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2. Energy Efficiency Impact of Processing in Memory: A Comprehensive Review of Workloads on the UPMEM Architecture
- Author
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Falevoz, Yann, Legriel, Julien, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Zeinalipour, Demetris, editor, Blanco Heras, Dora, editor, Pallis, George, editor, Herodotou, Herodotos, editor, Trihinas, Demetris, editor, Balouek, Daniel, editor, Diehl, Patrick, editor, Cojean, Terry, editor, Fürlinger, Karl, editor, Kirkeby, Maja Hanne, editor, Nardelli, Matteo, editor, and Di Sanzo, Pierangelo, editor
- Published
- 2024
- Full Text
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3. Study on the Impact of Thermal Management System and Heat Utilization Strategy on Energy Consumption of Electric Vehicles Under Low-Temperature
- Author
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Fang, Jinrong, Yang, Shuo, Wang, Puxi, Zhang, Zhihui, Li, Song, Zeng, Dong, China Society of Automotive Engineers, Angrisani, Leopoldo, Series Editor, Arteaga, Marco, Series Editor, Chakraborty, Samarjit, Series Editor, Chen, Jiming, Series Editor, Chen, Shanben, Series Editor, Chen, Tan Kay, Series Editor, Dillmann, Rüdiger, Series Editor, Duan, Haibin, Series Editor, Ferrari, Gianluigi, Series Editor, Ferre, Manuel, Series Editor, Jabbari, Faryar, Series Editor, Jia, Limin, Series Editor, Kacprzyk, Janusz, Series Editor, Khamis, Alaa, Series Editor, Kroeger, Torsten, Series Editor, Li, Yong, Series Editor, Liang, Qilian, Series Editor, Martín, Ferran, Series Editor, Ming, Tan Cher, Series Editor, Minker, Wolfgang, Series Editor, Misra, Pradeep, Series Editor, Mukhopadhyay, Subhas, Series Editor, Ning, Cun-Zheng, Series Editor, Nishida, Toyoaki, Series Editor, Oneto, Luca, Series Editor, Panigrahi, Bijaya Ketan, Series Editor, Pascucci, Federica, Series Editor, Qin, Yong, Series Editor, Seng, Gan Woon, Series Editor, Speidel, Joachim, Series Editor, Veiga, Germano, Series Editor, Wu, Haitao, Series Editor, Zamboni, Walter, Series Editor, Zhang, Junjie James, Series Editor, and Tan, Kay Chen, Series Editor
- Published
- 2024
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4. Dynamic Priority Based Application Offloading Strategy in Mobile Cloud Computing
- Author
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Sen, Priyajit, Pandit, Rajat, Sarddar, Debabrata, Filipe, Joaquim, Editorial Board Member, Ghosh, Ashish, Editorial Board Member, Prates, Raquel Oliveira, Editorial Board Member, Zhou, Lizhu, Editorial Board Member, Dasgupta, Kousik, editor, Mukhopadhyay, Somnath, editor, Mandal, Jyotsna K., editor, and Dutta, Paramartha, editor
- Published
- 2024
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5. Smart Buildings: Comparison of Various Deep Learning Models to Forecast Energy Consumption
- Author
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Li, C. H., Tam, K. Y., Lee, T. T., Mak, S. L., Lam, S. K., Lee, C. C., Chan, T. W., Tang, W. F., Ng, C., Yuen, H. Y., Kacprzyk, Janusz, Series Editor, Gomide, Fernando, Advisory Editor, Kaynak, Okyay, Advisory Editor, Liu, Derong, Advisory Editor, Pedrycz, Witold, Advisory Editor, Polycarpou, Marios M., Advisory Editor, Rudas, Imre J., Advisory Editor, Wang, Jun, Advisory Editor, Nagar, Atulya K., editor, Jat, Dharm Singh, editor, Mishra, Durgesh, editor, and Joshi, Amit, editor
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- 2024
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6. Towards an In-Between Practice to Study Energy Shift at Work
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Bouzekri, Elodie, Rivière, Guillaume, Hartmanis, Juris, Founding Editor, Goos, Gerhard, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Bramwell-Dicks, Anna, editor, Evans, Abigail, editor, Winckler, Marco, editor, Petrie, Helen, editor, and Abdelnour-Nocera, José, editor
- Published
- 2024
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7. Deficiencies Within CE and LCA Models: Agrowaste Fibre and Conventional Insulation Materials
- Author
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Yasser, Farres, Ianakiev, Anton, Mendoza, Marisela, Klalib, Hynda Aoun, Pisello, Anna Laura, Editorial Board Member, Hawkes, Dean, Editorial Board Member, Bougdah, Hocine, Editorial Board Member, Rosso, Federica, Editorial Board Member, Abdalla, Hassan, Editorial Board Member, Boemi, Sofia-Natalia, Editorial Board Member, Mohareb, Nabil, Editorial Board Member, Mesbah Elkaffas, Saleh, Editorial Board Member, Bozonnet, Emmanuel, Editorial Board Member, Pignatta, Gloria, Editorial Board Member, Mahgoub, Yasser, Editorial Board Member, De Bonis, Luciano, Editorial Board Member, Kostopoulou, Stella, Editorial Board Member, Pradhan, Biswajeet, Editorial Board Member, Abdul Mannan, Md., Editorial Board Member, Alalouch, Chaham, Editorial Board Member, Gawad, Iman O., Editorial Board Member, Nayyar, Anand, Editorial Board Member, Amer, Mourad, Series Editor, Battisti, Alessandra, editor, Piselli, Cristina, editor, Strauss, Eric J, editor, Dobjani, Etleva, editor, and Kristo, Saimir, editor
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- 2024
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8. Focus on energy efficiency: Voith presents digital solution OnView.Energy for the paper industry
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Paper industry -- Energy use ,Energy conservation ,Energy efficiency ,Energy consumption ,General interest ,News, opinion and commentary - Abstract
Germany: Voith GmbH & Co. KGaA has issued the following news release: Voith introduces OnView.Energy, an innovative digitalization solution for energy monitoring that enables paper manufacturers to visualize, monitor and [...]
- Published
- 2024
9. ELABORATION OF THERMAL INSULATION COMPOSITES BASED ON PAPER WASTE AND BIO-SOURCED MATERIAL.
- Author
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ARHAB, FATMA, DJEBRI, BOUALEM, SAIDI, HEMZA, NASSER MUTHANNA, BASSAM GAMAL, and MEBROUKI, ABDELKADER
- Subjects
ENERGY consumption ,THERMAL insulation ,WASTE paper ,CLIMATE change ,SUSTAINABILITY - Abstract
It is well-known that energy consumption is increasing around the world on a daily basis. In the construction sector, a highly effective solution for reducing energy consumption involves exploring both modern and traditional buildings designed to adapt to climate changes. One promising approach is to use paper waste and bio-sourced materials as the basis for insulation. The purpose of this study was to improve the sustainability of buildings by using recycled waste materials that have a positive impact on the environment, people, and the economy. A novel insulating material composed of recycled paper waste and Ampelodesmos mauritanicus leaves and fibers was developed and used in non-load-bearing elements. The paper waste was transformed into pulp and mixed with the bio-sourced materials to create a composite material that exhibits excellent insulation properties. The resulting material is lightweight, durable, and cost-effective. Furthermore, different mechanical and thermal analyses were performed on specimens with varying dosage ratios. The results showed that the developed material has good thermal insulation, with a value of 0.027 W/m.K. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
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10. CO2 ELECTROREDUCTION: CIRCULAR INNOVATION IN PULP & PAPER.
- Author
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Rezaei, Mohammad
- Subjects
PAPER pulp ,ELECTROLYTIC reduction ,PAPER industry ,RENEWABLE energy sources ,CIRCULAR economy ,TECHNOLOGICAL innovations ,ENERGY consumption - Abstract
The pulp and paper sector significantly impacts global CO
2 emissions, which makes it necessary to explore inventive solutions that endorse sustainability and circularity in the industry. This paper delves into the potential of the CO2 electrochemical reduction process, an innovative approach poised to address the sector's environmental hurdles and bolster its circular economy. CO2 electrochemical reduction, colloquially known as CO2 electroreduction, is an emerging technology adept at transforming carbon dioxide into beneficial chemicals and fuels, including carbon monoxide, formic acid, and various hydrocarbons. This process provides a two-pronged benefit: it helps curb CO2 emissions and simultaneously generates valuable byproducts, which can be reincorporated into the pulp and paper manufacturing cycle, thus fostering a circular economic model. In this paper, we initially sketch an overview of the existing state of the pulp and paper sector, emphasizing its environmental footprint and underscoring the need for inventive strategies to curtail its carbon emissions. Following this, we introduce the notion of CO2 electroreduction, elucidating its foundational principles, the catalysts involved, and the diverse products that can be synthesized through this mechanism. Subsequently, we venture into the potential applications of CO2 electroreduction within the pulp and paper industry, specifically focusing on how the end-products of the process can be leveraged to create a more circular and sustainable industry. We discuss the use of carbon monoxide and hydrocarbons as alternative energy sources or raw materials for paper production and related goods. We also consider the possibility of using formic acid as an eco-friendly alternative to conventional pulping and bleaching chemicals, which could further diminish the industry's environmental imprint. We then present recent case studies and advancements in CO2 electroreduction research, highlighting its potential for large-scale integration within the pulp and paper industry. As part of a chemical plant and equipment manufacturing company, we also address the challenges of implementing this technology, touching on aspects such as the need for efficient catalysts, energy consumption, and scalability of the process. The paper wraps up with a highlight of the role innovation plays in promoting circularity in the pulp and paper sector. The deployment of CO2 electroreduction technology could not only help reduce the industry's environmental consequences but also herald a more sustainable and circular future. By fostering cooperation among researchers, industry stakeholders, and policymakers, we can expedite the development and execution of such innovative solutions, which ultimately pave the way towards a greener and more sustainable global environment. [ABSTRACT FROM AUTHOR]- Published
- 2024
11. Monitoring solids content development in pilot-scale through air drying of tissue paper.
- Author
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Sjöstrand, Björn and Bergström, Viktor
- Subjects
- *
SUSTAINABILITY , *ENERGY consumption , *POWER resources , *TISSUES - Abstract
This study delves into the dynamic evolution of solids content in a pilot-scale through air drying tissue machine, aiming to enhance comprehension and refine optimization strategies for tissue manufacturing. It focuses on development of solids content throughout the process. Analyzing the interaction between process parameters and solids content provides deeper insights into water removal dynamics. The research employs solid contents monitoring techniques in pilot scale, offering a detailed view of solids content evolution from the wet web's inception to the final tissue product. It significantly highlights the impact of key parameters, particularly pulp refining, on solids content across all positions of the pilot machine. Additionally, the study emphasizes the influence of vacuum system configurations, identifying the relationship between energy expended in the vacuum system and evaporation energy. Furthermore, the results indicate that compression and air displacement dewatering in vacuum boxes are less speed-sensitive compared to heat-driven evaporation in the TAD- and Yankee cylinders. Solid contents at all positions in the tissue machine correlates between various dewatering elements. Optimizing site-specific dewatering and evaporation strategies can potentially save drying energy in the Yankee drying phase which hold promise for enhanced energy and resource utilization, aligning with demands for sustainable manufacturing practices. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
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12. Airborne power ultrasound for paper drying: an experimental study.
- Author
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Noori O'Connor, Zahra and Yagoobi, Jamal S.
- Subjects
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ULTRASONIC imaging , *FACTORIAL experiment designs , *PERMEABILITY measurement , *DOPPLER ultrasonography , *ANALYSIS of variance , *ENERGY consumption , *AIRBORNE-based remote sensing - Abstract
A novel approach for paper drying using airborne ultrasound technology is presented. A unique experimental setup is developed, and a systematic study is conducted using 23 factorial design of experiments and Analysis of Variance. Three controlling factors are considered in the experiments including the initial moisture content, basis weight and refining condition. The outcome of the experiments is compared to a previous work on direct-contact ultrasonic drying of paper. The results confirm that similar to direct-contact, for airborne ultrasonic drying, the basis weight/thickness of the sample is the most important factor in ultrasonic drying and it is followed by the effect of initial moisture content. Using linear regression model, a correlation for predicting the total time of ultrasonic drying is provided. Quality of the dried samples is evaluated, and the permeability measurements confirmed the effect of pore characteristics on ultrasonic drying. The analysis for energy consumption reveals that airborne ultrasonic drying is more efficient at higher moisture contents. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
13. The costs of overwintering in paper wasps (Polistes dominula and Polistes gallicus): the use of energy stores.
- Author
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Stabentheiner, Anton, Mauerhofer, Teresa, Willfurth, Regina, Kovac, Helmut, Stabentheiner, Edith, Käfer, Helmut, and Petrocelli, Iacopo
- Subjects
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ENERGY consumption , *WASPS , *SPRING , *POWER resources , *MEDITERRANEAN climate - Abstract
Overwintering insects are facing energetic challenges because of food shortage, low temperature, and desiccation stress. Paper wasps of the genus Polistes overwinter as mated adults (gynes) in hibernacula protecting them from predation, snow, and rain but barely from low environmental temperature. In different climates, they face differing overwintering temperature regimes, and therefore they may differ in their energy use. We investigated how much of energy resources built up until autumn is used during diapause dormancy in natural hibernacula by measuring lipid, glycogen, and free carbohydrate content in autumn and early spring in Polistes dominula from temperate European (Austrian) and warm Mediterranean (Italian) climate and Polistes gallicus from Mediterranean climate. Winter energy consumption amounted to ~ 339 and ~ 310 J per wasp in the Austrian and Italian Polistes dominula populations. The smaller Italian Polistes gallicus consumed ~ 247 J. This amounts to 2.62, 2.35, and 1.79 J per day. Of this, the energy demand was mainly fuelled by lipids (84%, 93%, and 90%, respectively), but glycogen stores contributed also considerably (16%, 6%, and 9%). Free carbohydrates decreased only by 0.7%, 1%, and 0.8%. While fat stores seem still sufficient in spring, the wasps depleted most of their carbohydrates. The energy reserves of 396, 400, and 147 J per wasp remaining in spring in the three populations seem sufficient to fuel rest or simple brood care activities for a whole summer but restrict foraging flights to a few hours (~ 3.5–6 h). Results suggest that energy supply might become challenging in expected future climate scenarios. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
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14. Metasphere Labs And Bluesphere Ventures Unveil Research Paper on Leveraging Bitcoin, AI, and the Metaverse for Sustainability
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Sustainable development ,Energy consumption ,General interest ,News, opinion and commentary - Abstract
VANCOUVER: Metasphere Labs Inc. announced the development of a pivotal research paper titled, 'Bitcoin, AI, and the Metaverse as Tools for Sustainability' in an era where digital innovation is rapidly [...]
- Published
- 2024
15. NiFe 2 O 4 Material on Carbon Paper as an Electrocatalyst for Alkaline Water Electrolysis Module.
- Author
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Wang, Ying-Chyi, Yu, Shuo-En, Su, Yu-Lun, Cheng, I-Chun, Chuang, Yi-Cheng, Chen, Yong-Song, and Chen, Jian-Zhang
- Subjects
CARBON-based materials ,CARBON paper ,WATER electrolysis ,ENERGY consumption ,ELECTROLYTIC cells ,ELECTROCATALYSTS - Abstract
NiFe
2 O4 material is grown on carbon paper (CP) with the hydrothermal method for use as electrocatalysts in an alkaline electrolyzer. NiFe2 O4 material is used as the anode and cathode catalysts (named NiFe(+)/NiFe(−) hereafter). The results are compared with those obtained using CP/NiFe as the anode and CP/Ru as the cathode (named NiFe)(+)/Ru(−) hereafter). During cell operation with NiFe(+)/Ru(−), the current density reaches 500 mA/cm2 at a cell voltage of 1.79 V, with a specific energy consumption of 4.9 kWh/m3 and an energy efficiency of 66.2%. In comparison, for NiFe(+)/NiFe(−), the current density reaches 500 mA/cm2 at a cell voltage of 2.23 V, with a specific energy consumption of 5.7 kWh/m3 and an energy efficiency of 56.6%. The Faradaic efficiency is 96–99%. With the current density fixed at 400 mA/cm2 , after performing a test for 150 h, the cell voltage with NiFe(+)/Ru(−) increases by 0.167 V, whereas that with NiFe(+)/NiFe(−) decreases by only 0.010 V. Good, long-term stability is demonstrated. [ABSTRACT FROM AUTHOR]- Published
- 2024
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16. Metasphere Labs and Bluesphere Ventures Unveil Research Paper on Leveraging Bitcoin, AI, and the Metaverse for Sustainability
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Sustainable development ,Energy consumption ,Advertising, marketing and public relations - Abstract
(GlobeNewswire) - Metasphere Labs Inc. (formerly Looking Glass Labs Inc., Metasphere, or the Company) (Cboe Canada: LABZ) (OTC: LABZF) (FRA: H1N), in partnership with impact venture studio Bluesphere Ventures Inc. [...]
- Published
- 2024
17. Metasphere Labs and Bluesphere Ventures Unveil Research Paper on Leveraging Bitcoin, AI, and the Metaverse for Sustainability
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Sustainable development ,Energy consumption ,Banking, finance and accounting industries ,Business - Abstract
VANCOUVER, British Columbia, March 12, 2024 (GLOBE NEWSWIRE) -- Metasphere Labs Inc. ( formerly Looking Glass Labs Inc., 'Metasphere', or the 'Company') (Cboe Canada: https://www.cboe.ca/en/live/security-activity/LABZ%23!/market-depth) (OTC: https://www.otcmarkets.com/stock/LABZF/overview) (FRA: https://www.boerse-frankfurt.de/equity/metasphere-labs-inc), in [...]
- Published
- 2024
18. Astron Paper and Board Mill to invest in development of 10-megawatt solar power plant
- Subjects
Solar energy ,Green technology ,Solar power plants ,Energy consumption ,Company investment ,Business, international - Abstract
The company has also executed Memorandum of Understanding with Government of Gujarat Astron Paper and Board Mill is all set to invest in the development of a state-of-the-art 10-megawatt solar [...]
- Published
- 2024
19. El camino de la innovación en la industria papelera.
- Author
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Oleaga, Arantza Pérez, Elejalde, Cecilia Sanjuan, and Álvarez, Rodrigo Álvarez
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PAPER industry ,FOREST management ,ENERGY consumption ,SUSTAINABILITY ,LIGNINS - Abstract
Copyright of Montes is the property of Colegio y Asociación de Ingenieros de Montes and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2024
20. Theoretical analysis and design of roller mower straight blade.
- Author
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Zhang, Lingyan, Yao, Cheng, Ying, Weiqiang, Luo, Shijian, and Ying, Fangtian
- Subjects
- *
PAPER arts , *MATHEMATICAL optimization , *STRUCTURAL optimization , *ENERGY consumption , *CONSUMPTION (Economics) - Abstract
In order to study the cutting performance of the straight edge hob and reduce the cutting power consumption model of the straight edge hob, this paper takes the cutting power of the straight edge hob as the minimum goal, and establishes the mathematical model of the optimization design of the straight edge hob based on the composite optimization method. The mathematical model is solved by MATLAB software. At the same time,the mowing characteristics of a roller blade were studied by investigating the relationship between the hob and the coordination of variables such as rotational speed and roller diameter with the mowing parameters. The parameter analysis of straight edge hob before and after structural parameter optimization is generated, and a design method is proposed based on this. After defining the objective function and constraint conditions, the influence of structural parameters on the power consumption and efficiency of the hob was determined by optimising the complex method; this could significantly adjust the hob parameters to lower its power consumption. The energy consumption of the optimized design is reduced by 11.1 % compared with the original scheme, and the optimization effect is remarkable. The results show that the best working parameters of the hob are cutting speed of 1000 r/min, sliding cutting angle and grinding edge angle of 25~30°. Moreover, practical tests demonstrated the feasibility of using the proposed method to design the straight edge hob to improve mowing performance and hob stability. This study can provide parameter foundation and an optimization method for lowering chopping power consumption of the roller mower blade. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
21. Prediction Method of PHEV Driving Energy Consumption Based on the Optimized CNN BiLSTM Attention Network.
- Author
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Zhang, Xuezhao, Chen, Zijie, Wang, Wenxiao, and Fang, Xiaofen
- Subjects
- *
ENERGY consumption , *ELECTRONIC paper , *TRAFFIC flow , *ACCELERATION (Mechanics) , *VEHICLE models , *MOTOR vehicle driving , *HYBRID electric vehicles - Abstract
In the field of intelligent transportation, the planning of traffic flows that meet energy-efficient driving requirements necessitates the acquisition of energy consumption data for each vehicle within the traffic flow. The current methods for calculating vehicle energy consumption generally rely on longitudinal dynamics models, which require comprehensive knowledge of all vehicle power system parameters. While this approach is feasible for individual vehicle models, it becomes impractical for a large number of vehicle types. This paper proposes a digital model for vehicle driving energy consumption using vehicle speed, acceleration, and battery state of charge (SOC) as inputs and energy consumption as output. The model is trained using an optimized CNN-BiLSTM-Attention (OCBA) network architecture. In comparison to other methods, the OCBA-trained model for predicting PHEV driving energy consumption is more accurate in simulating the time-dependency between SOC and instantaneous fuel and power consumption, as well as the power distribution relationship within PHEVs. This provides an excellent framework for the digital modeling of complex power systems with multiple power sources. The model requires only 54 vehicle tests for training, which is significantly fewer than over 2000 tests typically needed to obtain parameters for power system components. The model's prediction error for fuel consumption under unknown conditions is reduced to 5%, outperforming the standard error benchmark of 10%. Furthermore, the model demonstrates high generalization capability with an R2 value of 0.97 for unknown conditions. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
22. Holistic assessment of Brazil's bioenergetic potential.
- Author
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de Sousa, Laura Vieira Maia, Silva Lora, Electo Eduardo, de Lisboa, Fábio Cordeiro, Filho, Fernando Bruno Dovichi, and del Olmo, Oscar Almazan
- Subjects
AGRICULTURAL wastes ,SULFATE waste liquor ,SOLID waste ,ENERGY consumption ,PAPER industry ,ARBORICULTURE ,URBAN plants ,SUGARCANE - Abstract
There is an urgent need for energy sources with lower environmental impacts to dispose of waste generated by human activities. In this context, a holistic analysis of energy use of waste from agricultural and forestry activities, animal excreta, urban solid waste and sewage, waste from the pulp and paper industry and charcoal in Brazil is presented. Based on a bibliographic review, the current Brazilian panorama is presented in figures giving, a vision of national potential for harnessing bioenergy from this theoretical and technical potential. The QGIS3.24.2 Tisler geoprocessing tool was used to generate potentiality maps from census data of microregions and municipalities available in the IBGE database (2022) and in the Geocentric Reference System for the Americas (SIRGAS 2000). The results of map analysis by micro‐regions of the primary energy from agricultural residues highlight sugar cane, corn and soybeans crops, followed by wastewater and animal excreta. They stood out amont the studied sources of biomass with technical potentials of 53.17, 15.23 and 6.81 GW, respectively. With these results, it is concluded that Brazil could enable around 75 GW installed power, reusing all biomass, potentially 12.5 PJ, without considering the 16 GW already installed from sugarcane and paper black liquor plants. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
23. Rebuild by ANDRITZ Gives Shandong Huatai Paper World's Largest Mechanical Pulping Line while Saving Energy and Resources.
- Subjects
- *
PAPER industry , *MECHANICAL pulping process , *NEW business enterprises , *ENERGY consumption - Published
- 2024
24. Enhancing Subsequent Kraft Fiber Dewatering Properties by using Fiber Polyamide-epichlorohydrin (PAE) Treatment to Prepare a Dry Pulp Product
- Author
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Antti Korpela, Atsushi Tanaka, and Jaakko Asikainen
- Subjects
market pulp ,dewatering ,bulking aid ,energy consumption ,pae ,paper properties ,Biotechnology ,TP248.13-248.65 - Abstract
The energy needed for the dewatering and drying of wet paper web represents around half of the energy consumption of papermaking processes. The present work examined whether the dewatering and drying of paper could be enhanced during a previous pulp drying process by pretreating the fibers with polyamide-epichlorohydrin (PAE). According to the hypothesis, the cured PAE restrains swelling and water absorption of water-wetted fibers by forming a fiber-bound, self-crosslinked polymer-network on the fiber surfaces. The hypothesis was tested by adding PAE to never-dried kraft pulp slurry followed by pulp thickening, drying, and final curing of the PAE-resin. After this, the PAE-treated fibers were dispersed in water, and their water retention values (WRV) and Shopper-Riegler values (○SR) were measured. The PAE pretreatments notably decreased the fibers´ WRV and ○SR, indicating improved water removal of paper web in the paper machine forming and drying section. Compared to chemical crosslinking pretreatments, which also can be used to decrease fibers WRV and ○SR-value, a notable advantage of PAE-pretreatment is milder required curing conditions of the PAE, which makes implementation of the method easier in practice. Due to decreased fiber-to-fiber bonding capability, the PAE-treated specialty fibers could take advantage especially as a bulking aid of paperboard, tissue, and absorbent materials.
- Published
- 2024
25. The smart home automated control system development.
- Author
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Zakozhurnikov, Sergei, Pikhtilkova, Olga, Pronina, Elena, and Raff, Oleg
- Subjects
SMART homes ,AUTOMATIC control systems ,HOUSING management ,ELECTRONIC paper ,ENERGY consumption - Abstract
The paper describes a smart home control system, which includes lighting, microclimate and security subsystems, as well as control algorithms for various operating scenarios. The process of the system operation is described in detail, the visualization of the system is presented in the form of a 3d model. The article shows the practical significance of the system, describes its functionality. The work is of undoubted relevance, since the introduction of a house management system can improve conditions of life and achieve high energy efficiency rates. The article presents in detail each element of the control system, namely: a control device, a control object, a set of sensors. On the example of the lighting subsystem, the process of creating the entire automated control system is described. An algorithm for automatic lighting operation is obtained and described. To control the system, a human-machine interface was developed in the OpenHab program. A panel with indicators of the light sensor is presented, its functionality is described. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
26. Management smart building with photovoltaic using (ANN) to increase energy efficiency.
- Author
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Jalal, Bareq Musaab and Al Rubayi, Rashid H.
- Subjects
ENERGY consumption ,BUILDING-integrated photovoltaic systems ,DIESEL electric power-plants ,ELECTRIC power ,INTELLIGENT buildings ,ENERGY management ,ELECTRIC power consumption ,ELECTRONIC paper - Abstract
the issue of rising electricity demand in the building sector is one of the major challenges. Therefore, the Building Management System (BMS) inside the building. Since the PV, national grid, and diesel generators supplies building electrical power, so the Energy Management System (EMS) technologies are necessary to study the priority of PV to supply building power to save energy. This paper proposes a Smart Building Management System (SBMS) used with Heating, Ventilation, and Air Conditioning (HVAC) in addition lighting systems. HVAC is controlled with occupancy sensors, temperature control, and load control. Lighting systems are controlled through occupancy sensors and daylight sensors to make them operate to minimize electricity consumption. Using Artificial Neural Network (ANN) control of the EMS in this work, SBMS and EMS are created and simulated using two case studies to supply public buildings. The first situation is SBMS without EMS and the second situation is SBMS with EMS. Finally, the results showed the impact of SBMS on the reduction of energy consumption for HVAC systems and lighting (20% on summer day and 11% on winter day), as the energy consumption was reduced for both HVAC and lighting by about (54% on a summer day and 44% on a winter day) because we added the scenario of case two to the one scenario case in a public building. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
27. Research on the Resource Treatment and Comprehensive Utilization of Carbon Containing Wastes Using Pyrolysis–Gasification Two-Stage Recycling.
- Author
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Yang, Li, Zhang, Xiang, Yan, Shubin, and Luo, Yunxia
- Subjects
TECHNOLOGICAL innovations ,WASTE gases ,SOLID waste ,ENERGY consumption ,CARBON ,LANDFILL management ,PAPER recycling - Abstract
Carbon containing waste has a certain calorific value and utilization value due to the presence of carbon elements. However, the current treatment methods are mostly traditional landfill disposal, incineration, or expensive physical and chemical reaction methods, which clearly do not comply with the rules of the current clean and resource-saving society. In this paper, a new technology and system for carbon containing wastes is proposed, which comprehensively treats and recycles carbon containing wastes, including solid waste, wastewater, waste gas, etc., using pyrolysis–gasification two-stage-cycle technology. The calculation results indicate that the technical scheme proposed in this article is feasible and can achieve the recycling of intermediate and final products, the efficient and clean utilization of carbon containing waste, and the graded utilization of energy. The clean utilization rate of carbon containing waste can be effectively improved, the energy consumption and cost of separate treatments can be reduced, and zero waste emissions can be completely achieved by the comprehensive pyrolysis–gasification two-stage-cycle treatment and resource utilization technology, which is one of the preferred solutions for future resource-saving societies. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
28. Digitalization in the Renewable Energy Sector.
- Author
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El Zein, Musadag and Gebresenbet, Girma
- Subjects
DIGITAL technology ,ENERGY industries ,RENEWABLE energy sources ,LITERATURE reviews ,ENERGY development ,ENERGY consumption - Abstract
This study explored the association between renewable energy uptake and digitalization in the sector by reviewing relevant literature (published 2010–2022), with the aim of identifying the existing utilization of digital technologies within the sector, challenges to adoption, and future prospects. Different search engines (SCOPUS, Web of Science, and Google Scholar) were used to locate relevant papers and documents. The results revealed the high significance of digital technologies in supporting the renewable energy sector, with high costs and security risks representing the key challenges. Most papers reviewed had a positive outlook, but recommended further research and development for effective energy transition and resilient infrastructure. The current drivers of the integration of digital technologies to support the diffusion of renewable energy sources appear to extend beyond energy demand and involve many aspects of sustainability and sustainable development. Compared with previous reviews, this work has unique scope and novelty since it considers the bigger picture of the coupling between digitalization and the renewable energy sector, with a greater focus on critical areas in these two interconnected bodies that need to be addressed. The relatively small sample of relevant papers (69 from 836 hits) located in the literature review confirms the need for more research covering the subject in greater depth. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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29. Addressing Water Sustainability in the 21st Century: The Role of Engineering and Technology.
- Author
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Whulanza, Yudan, Kusrini, Eny, Suwartha, Nyoman, and Maknun, Imam Jauhari
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ENGINEERING ,SUSTAINABILITY ,BUSINESS planning ,CONSUMER behavior ,ENERGY consumption ,NATURAL fibers ,ENGINEERS ,CATALYTIC cracking ,NUCLEAR reactors - Abstract
This document provides a summary of various research papers covering a wide range of topics. The papers explore subjects such as the properties of glass fiber reinforced polyamide 6, new materials for nuclear reactor fuel cladding, natural fiber composites for noise control, regenerative anti-lock braking systems for electric vehicles, vehicle sensing and localization technologies for autonomous driving, UAV communications, linear profile involute gears, digital marketing capabilities in Indonesian firms, factors influencing confidence in STEM practices among preservice teachers, tangible user interfaces for physical therapy in children, intelligent interfaces for personalized recommendations in tourism websites, paper-based glucose sensors for non-invasive glucose monitoring, top-priority industries in Russian regions, scalable processes for producing analytical grade sodium chloride, functionalization of cotton fabric using silver nanoparticles, catalytic cracking of palm fatty acid distillate for biofuel production, and kinetic models for enzymatic biodiesel production. These papers provide valuable insights into various scientific and technological advancements in their respective fields. [Extracted from the article]
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- 2024
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30. Investigation into energy performance of a multi-building complex in a hot and humid climate: efficacy of energy saving measures
- Author
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Tan, Xian Yun, Mahyuddin, Norhayati, Kamaruzzaman, Syahrul Nizam, Mat Wajid, Norhayati, and Zainal Abidin, Abdul Murad
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- 2024
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31. Development of comprehensive energy usage impact and carbon footprint parameters for green building life cycle assessment
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Usman, Abdullahi Mohammed and Abdullah, Kamil
- Published
- 2024
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32. Indoor environmental quality and energy use intensity: an empirical post-occupancy evaluation test of on-campus university student housing in Ghana
- Author
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Appau, Williams Miller, Attakora-Amaniampong, Elvis, and Anugwo, Iruka Chijindu
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- 2024
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33. Modeling and solving the multi-objective energy-efficient production planning and scheduling with imperfect maintenance activities
- Author
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Rastgar, Iman, Rezaeian, Javad, Mahdavi, Iraj, and Fattahi, Parviz
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- 2024
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34. The effect of population aging on environmental degradation: new evidence and insights
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Hondroyiannis, George, Papapetrou, Evangelia, and Tsalaporta, Pinelopi
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- 2024
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35. The nexus between tourism development, environmental quality and economic growth. Does renewable energy help in achieving carbon neutrality goal?
- Author
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Banga, Cathrine, Deka, Abraham, Ringim, Salim Hamza, Mustapha, Abubakar Sadiq, Özdeşer, Hüseyin, and Kilic, Hasan
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- 2024
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36. Investigation of the use of glycerin as a by-product, pomace oil and paper wastewater as grinding aids in marble dust wastes.
- Author
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Katircioglu-Bayel, Diler
- Subjects
- *
MARBLE , *FOURIER transform infrared spectroscopy , *STONE , *WASTE recycling , *STONE industry , *ENERGY consumption - Abstract
[Display omitted] • Ultrafine marble dust waste particles were obtained using the top–down approach. • Waste and by-products had positive effect on dry grinding of stone wastes. • It is economically feasible, also environmentally friendly. • These obtained ultrafine particles can be used effectively mineral filler in many areas. Waste management in marble processing plants is a considerable problem in countries with developed stone industries and trade. Research on the utilization of stone waste in different fields is still continuing. However, there are few studies on using this stone waste from processing plants as mineral fillers. Moreover, no study in the literature has investigated the influence of grinding aids on stone properties. The current research is the first to compare of the efficiency of different grinding aids on the waste calcitic and dolomitic marble in the production of mineral fillers. The objective of this work is to research the impacts of waste and by-products on the dry grinding of stone wastes as grinding aids in a vertical stirred media mill. The results were assessed in terms of various parameters: product particle size, powder flowability, material coating on the grinding media, and energy consumption. Remarkably, the study showed that the use of any of the grinding aids tested enhanced the grinding process in comparison with the no-aid condition. The best product fineness value was achieved with pomace oil followed by the by-product glycerin, among the grinding aids tested in both samples. Moreover, a higher media coating reduction and the highest energy saving were achieved with pomace oil. The most significant and lowest increase in the fluidity index was achieved with pomace oil and paper wastewater, respectively. Additionally, the Fourier transform infrared spectroscopy (FTIR) performed to reveal the interaction between particle surfaces and grinding aids demonstrated the activity of pomace oil and glycerin polar functional groups on particle surfaces. The analysis of the agglomeration phenomenon with SEM (scanning electron microscopy) micrographs showed that particle agglomeration could be eliminated with the pomace oil. Thermogravimetric analysis (TGA) was used to investigate changes in the mass of the samples' due to temperature changes. With this study, a significant contribution will be made to the ecosystem using waste marble powder whose storage problematic. [ABSTRACT FROM AUTHOR]
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- 2024
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- View/download PDF
37. Techniques for improving the productivity of a single slope solar still distillation of fresh water: A review paper.
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Abdulridha, Hussein Oleiwi, Hameed, Hassanain Ghani, and Merzah, Basil Noori
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- *
SOLAR stills , *FRESH water , *SOLAR radiation , *SOLAR energy , *CLEAN energy , *ENERGY consumption - Abstract
Numerous human activities and a rapidly growing world population are increasing the demand for freshwater. Fresh water production relies heavily on the use of conventional fuels and is associated with environmental pollution, leading to the need to look for other alternatives such as clean energy (solar energy). There are many villages and rural areas in the world without access to clean water. Many desalination systems have been developed to address this shortcoming. This study describes strategies for increasing clean water solar energy productivity that are currently in commercial and experimental development stages. Solar stills are the most prudent method for delivering new water since they just sudden spike in demand for the energy of the sun, which is promptly accessible in nature. The focus is on technologies that can be used independently, especially those that can be integrated into solar thermal systems. The results show that the solar thermal distillation yield is inversely proportional to the basin water depth and is directly related to the wind speed in the absorbing region, the temperature of the glass covers and the incident solar radiation. Add to the technology used inside and outside the system to improve productivity. [ABSTRACT FROM AUTHOR]
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- 2024
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38. Does urbanization cause energy consumption amidst globalization and FDI in South Asia? A pooled mean group estimation
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Islam, Md. Saiful
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- 2024
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39. A review of hydraulic energy harvester designs – current practice and future improvements.
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Giunta, Lorenzo, Roscow, James, and Liu, Jingqi
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DESIGN education ,ENERGY harvesting ,HYDRAULIC engineering ,ENERGY consumption ,RAPID prototyping - Abstract
This paper addresses the underexplored domain of hydraulic energy harvesters (HEH). Through a literature review, existing designs are identified, aiding in the categorisation of energy conversion technologies and fluid-mechanical interfaces. Recognizing a lack of standardized approaches to testing HEH, the paper proposes a re-configurable test platform. The platform, accommodating diverse configurations, operates at high pressures, aligns with existing hydraulic setups, and functions in static or dynamic modes. This tool aims to assist researchers further explore the implementation of HEHs. [ABSTRACT FROM AUTHOR]
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- 2024
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40. Nachhaltige Papierproduktion: Was die Schoellershammer PM 6 zur Benchmark für Energieeffizienz macht.
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SUSTAINABILITY ,TECHNOLOGICAL innovations ,HEAT recovery ,ENERGY consumption ,WATER consumption ,PAPER mills ,CLEANING ,MAINTENANCE costs - Abstract
Copyright of Wochenblatt für Papierfabrikation is the property of dfv Mediengruppe and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2024
41. Towards environmental sustainability: nexus of ecological footprint, human capital, economic growth and energy consumption in India
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Ritu, Rajveer Kaur and Kaur, Amanpreet
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- 2024
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42. Energy Assessment: Pragmatischer Ansatz zur Identifizierung von Einsparpotenzialen und zum Erreichen vom Net-Zero-Emissionsziel.
- Author
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Alexander, Mikula
- Subjects
ENERGY industries ,PROCESS optimization ,RAW materials ,CONSUMERS ,PAPER industry ,ENERGY consumption ,FACTORIES - Abstract
Copyright of Wochenblatt für Papierfabrikation is the property of dfv Mediengruppe and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2024
43. IMPLEMENTATION OF A VIRTUOUS INCUBATION SYSTEM UTILIZING IOT TECHNOLOGY.
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CHILUPSYA, PRECIOUS and MULEPA, JOEL
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INTERNET of things ,PRODUCTION losses ,CHICKS ,POULTRY farming ,OPERATING costs ,ENERGY consumption ,AGRICULTURAL technology ,INTELLIGENT transportation systems - Abstract
The Virtuous Incubation System is a solution aimed at transforming poultry farming by integrating Internet of Things (IoT) technology into the incubation process. This paper seeks to improve the efficiency and success rate of poultry egg incubation while minimizing manual intervention, reducing resource consumption, and ensuring optimal conditions for embryo development by providing a smart incubator system. The smart incubator addresses the challenges of traditional manual monitoring and adjustments by leveraging IoT devices, sensors, and data analytics to create an automated and intelligent incubation system. It provides energy efficiency by incorporating energy-efficient components to minimize power consumption, thereby reducing operational costs for farmers, and by providing notifications and alerts where critical deviations in environmental conditions or equipment malfunction, enabling proactive intervention to prevent losses. A cross-section of small- to medium-scale poultry producers, particularly those engaged in hatching chicks, were interviewed to highlight the main challenges regarding the business of hatching chicks. It was learned through the interviews that chick production on a small to medium scale was relatively expensive due to the labor employed to monitor the production and losses due to adverse conditions resulting in a poor success rate in hatching the chicks. Thus, the implementation of the virtuous incubation system comes in to solve the main challenges being faced by the local poultry producers. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
44. Social acceptance, emissions analysis and potential applications of paper-waste briquettes in Andean areas.
- Author
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Calle Mendoza, Iris Jabneel, Gorritty Portillo, Marcelo Antonio, Ruiz Mayta, Jazmin Gidari, Alanoca Limachi, Jose Luis, Torretta, Vincenzo, and Ferronato, Navarro
- Subjects
- *
BRIQUETS , *SOCIAL acceptance , *INDOOR air pollution , *ENERGY consumption , *ALTERNATIVE fuels , *ANIMAL droppings - Abstract
The research assessed waste-based briquettes consumption compared to conventional fuels in the Andes. Laboratory tests were conducted together with on-field analysis in Colquencha (Bolivia). The laboratory study shows that the performances of briquettes are better in terms of PM2.5 (933.4 ± 50.8 mg kg−1) and CO emissions (22.89 ± 2.40 g kg−1) compared to animal dung (6265.7 ± 1273.5 mgPM2.5 kg−1 and 48.10 ± 12.50 gCO kg−1), although the boiling time increased due to the lower fuel consumption rate and firepower compared to shrubs. The social survey organized with 150 Bolivian citizens suggested that low-income households are not able to pay for an alternative fuel: about 40% would pay less than 4 USD per month, while methane use for cooking is positively correlated with the income level (r = 0.244, p < 0.05). On field analysis suggested that local cookstoves are not appropriate for briquettes combustion since indoor air pollution overcomes 30 ppm of CO and 10 mgPM2.5 m-3. On balance, local small manufactures can be the main target for selling waste-based briquettes to reduce shrubs and wood consumption. However, briquettes production costs seem not yet competitive to natural easy-to-obtain fuels (i.e., animal dung). The research encourages the use of cellulosic and biomass waste-based briquettes in the Andean area for cooking, heating, or manufacturing and strongly advises policy-makers to introduce economic incentives for the recovery of secondary raw materials. • Analysis of waste-based briquettes use in Andean areas were conducted. • Laboratory analysis, social surveys, and on field evaluations are the methods. • Briquettes can be employed for reducing about 30% of the conventional fuels. • The research encourages the employment of waste-based briquettes in the Andes. • Incentives to briquettes production and consumption should be introduced. [ABSTRACT FROM AUTHOR]
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- 2024
- Full Text
- View/download PDF
45. SMART HOME POWER MANAGEMENT BASED ON IOT.
- Author
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MANG'ANDA, HENDRY
- Subjects
SMART homes ,HOME energy use ,PRIVATE networks ,INTERNET of things ,ENERGY consumption ,RESIDENTIAL heating systems - Abstract
This paper explores the implementation of Internet of Things (IoT) technology to create a remote-control system for electrical equipment in households. The system offers a unified interface for managing various home appliances, including lights, vertical curtains, and air conditioning units. A private network infrastructure supports a personal cloud service, enabling remote access to appliance controls through the internet. The primary objective of this study is to enhance energy efficiency within households by facilitating convenient and remote management of electrical devices. Through the IoT framework, users can monitor and adjust appliance settings based on environmental conditions, accessed through a web server and user-friendly web applications or smartphone interfaces. Key findings of this paper include the real-time monitoring of electrical parameters through web applications, providing insights into energy usage patterns and opportunities for optimization. By leveraging IoT technology, homeowners can reduce energy consumption and contribute to environmental sustainability while enjoying improved convenience in appliance management. This study underscores the importance of integrating IoT solutions into household infrastructure to promote energy conservation and enhance overall efficiency. The implications of this paper extend to both individual homeowners and broader efforts to mitigate energy consumption in residential settings, ultimately contributing to a more sustainable future. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
46. Artificial Intelligence and Sustainability—A Review.
- Author
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Dhiman, Rachit, Miteff, Sofia, Wang, Yuancheng, Ma, Shih-Chi, Amirikas, Ramila, and Fabian, Benjamin
- Subjects
ARTIFICIAL intelligence ,SUSTAINABILITY ,ENERGY consumption ,STAKEHOLDERS - Abstract
In recent decades, artificial intelligence has undergone transformative advancements, reshaping diverse sectors such as healthcare, transport, agriculture, energy, and the media. Despite the enthusiasm surrounding AI's potential, concerns persist about its potential negative impacts, including substantial energy consumption and ethical challenges. This paper critically reviews the evolving landscape of AI sustainability, addressing economic, social, and environmental dimensions. The literature is systematically categorized into "Sustainability of AI" and "AI for Sustainability", revealing a balanced perspective between the two. The study also identifies a notable trend towards holistic approaches, with a surge in publications and empirical studies since 2019, signaling the field's maturity. Future research directions emphasize delving into the relatively under-explored economic dimension, aligning with the United Nations' Sustainable Development Goals (SDGs), and addressing stakeholders' influence. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
47. Balance Between User Comfort and Energy Consumption of Two-timescale Optimization and Control in Majorization Order
- Author
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Nie, Zelin, Yan, Chao-Bo, Gao, Feng, Cheng, Wei, Zhou, Guanghui, and Chen, Xuefeng
- Published
- 2024
- Full Text
- View/download PDF
48. Valmet and Saipem Sign MOU to Develop Integrated Solutions to Support Decarbonization of Hard-to-Abate Industries.
- Subjects
- *
PAPER industry , *CARBON offsetting , *CLIMATE change , *ENERGY consumption , *RENEWABLE energy transition (Government policy) - Published
- 2024
49. Service and Energy Management in Fog Computing: A Taxonomy Approaches, and Future Directions.
- Author
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Hashemi, S. M., Sahafi, A., Rahmani, A. M., and Bohlouli, M.
- Subjects
ENERGY management ,INTERNET of things ,ENERGY consumption ,COMPUTING platforms ,COMPUTER architecture ,EDGE computing - Abstract
Background and Objectives: Today, the increased number of Internet-connected smart devices require powerful computer processing servers such as cloud and fog and necessitate fulfilling requests and services more than ever before. The geographical distance of IoT devices to fog and cloud servers have turned issues such as delay and energy consumption into major challenges. However, fog computing technology has emerged as a promising technology in this field. Methods: In this paper, service/energy management approaches are generally surveyed. Then, we explain our motivation for the systematic literature review procedure (SLR) and how to select the related works. Results: This paper introduces four domains of service management and energy management, including Architecture, Resource Management, Scheduling management, and Service Management. Scheduling management has been used in 38% of the papers. Therefore, they have the highest service management and energy management. Also, Resource Management is the second domain that has been able to attract about 26% of the papers in service management and energy management. Conclusion: About 81% of the fog computing papers simulated their approaches, and the others implemented their schemes using a testbed in the real environment. Furthermore, 30% of the papers presented an architecture or framework for their research, along with their research. In this systematic literature review, papers have been extracted from five valid databases, including IEEE Xplore, Wiley, Science Direct (Elsevier), Springer Link, and Taylor & Francis, from 2013 to 2022. We obtained 1596 papers related to the discussed subject. We filtered them and achieved 47 distinct studies. In the following, we analyze and discuss these studies; then we review the parameters of service quality in the papers, and ultimately, we present the benefits, drawbacks, and innovations of each study. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
50. Energy-Efficient Timetabling Approach Considering Varying Train Loads and Realistic Speed Profiles.
- Author
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Zixuan Zhu, Fangsheng Wang, Rudong Yang, Zhibin Jiang, Ruihua Xu, and Vansteenwegen, Pieter
- Subjects
ROLLING stock ,SPEED ,ENERGY consumption ,GENETIC algorithms ,OPERATING costs ,SUSTAINABLE development - Abstract
Energy saving has become a key concern of metro systems to reduce operating costs and meet the requirements of sustainable development. Energy-efficient timetabling, an effective way to reduce traction energy consumption, has gotten much attention in recent decades. However, limited research about energy-efficient timetabling simultaneously considered realistic speed profiles and the influence of train loads, which change greatly in different sections and significantly affect energy consumption. Therefore, this paper proposes an energy-efficient timetabling approach to improve regenerative energy utilization based on varying train loads and realistic speed profiles for bidirectional metro lines. First, based on the operational and safety constraints, this paper constructs an integer energy-efficient timetabling model where dwell times and nonuniform headways are taken as decision variables. Besides, the turnaround process is also considered to ensure rolling stock circulation efficiency. Sectional passenger volumes are employed to determine the varying train loads. Energy consumption is calculated based on realistic speed profiles. Owing to the complexity of the model, an improved adaptive large neighborhood search (ALNS) algorithm is designed to solve this model according to its characteristics. Finally, numerical examples are conducted based on the practical data from Shanghai Metro Line 17. The results indicate that the proposed approach effectively solves the energy-efficient timetabling problem with varying train loads and realistic speed profiles for bi-directional metro lines. The approach is suitable for off peak hours and can reduce energy consumption effectively, and the reduction is up to 11.9% for the presented cases. The improved ALNS algorithm can find good solutions within reasonable times in different cases. Moreover, compared with the widely used genetic algorithm in the literature, the improved ALNS algorithm is more efficient in solving the proposed energy-efficient timetabling problem in different cases. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
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