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Marine engineering officers operate and maintain the ship's machinery during normal navigation. Most accidents on board are related to human factors which, at the same time, are associated with the workload of the crew members and the working environment. The number of alarms is so high that, most of the time, instead of helping to prevent accidents, it causes more stress for crew members, which can result in accidents. Convolutional Neural Networks (CNNs) are being employed in the recognition of images, which depends on the quality of the images, the image recognition algorithm, and the very complex configuration of the neural network. This research study aims to develop a user-friendly image recognition tool that may act as a visual sensor of alarms adjusted to the particular needs of the ship operator. To achieve this, a marine engineering simulator was employed to develop an image recognition tool that advises marine engineering officers when they are conducting their maintenance activities, with the aim to reduce their stress as a work risk prevention tool. Results showed adequate accuracy for three-layer Convolutional Neural Networks and balanced data, and the use of external cameras stands out for user-friendly applications. [ABSTRACT FROM AUTHOR]

Abstract Requiem sharks (genus Carcharhinus) have previously been reported to form large aggregations around marine infrastructures in the eastern Mediterranean Sea. While this behaviour may offer fitness advantages at the individual level, the implications of extended residency at human-altered habitats for population persistence have yet to be assessed. In this work, we investigated the phylogeographic and demographic composition of sharks near a coal-fired power and desalination station in Israel. Our aim was to infer habitat use and the mechanisms underlying the aggregation behaviour, and to highlight potential conservation impacts. We sampled, measured, and released 70 individuals between 2016 and 2022 to assess genetic variability within the cytochrome C oxidase I (COI) region and to analyse the aggregation’s structure based on the sharks’ size and sex distribution. In addition, we performed meristic counts on a reference specimen collected dead at another power station in Israel to supplement species identification using the abovementioned techniques. Our findings indicate size-based sex segregation of adult female dusky and male sandbar sharks (Carcharhinus obscurus and Carcharhinus plumbeus, respectively), with each species comprising two COI haplotypes. In the dusky shark, one haplotype corresponded to an Indo-Pacific lineage, and the other matched an Atlantic lineage. In the sandbar shark, we observed a haplotype previously sampled in the Mediterranean Sea, the Red Sea, the Northwest Indian Ocean, and South Africa, and another haplotype that was unique to our study site and genetically closer to the former than to sequences sampled in other ocean basins. This study provides the first indication of sympatric aggregation amongst phylogeographically distinct dusky and sandbar shark lineages, suggesting that human-altered habitats in the eastern Mediterranean Sea may influence the distribution of these species. Based on the observed segregation pattern, we conclude that the site does not function as a nursery, parturition, or mating area, and discuss other plausible explanations that warrant further research. Finally, we highlight important directions for future research and the implications of our findings for management and conservation.

Marine engineering officers operate and maintain the ship’s machinery during normal navigation. Most accidents on board are related to human factors which, at the same time, are associated with the workload of the crew members and the working environment. The number of alarms is so high that, most of the time, instead of helping to prevent accidents, it causes more stress for crew members, which can result in accidents. Convolutional Neural Networks (CNNs) are being employed in the recognition of images, which depends on the quality of the images, the image recognition algorithm, and the very complex configuration of the neural network. This research study aims to develop a user-friendly image recognition tool that may act as a visual sensor of alarms adjusted to the particular needs of the ship operator. To achieve this, a marine engineering simulator was employed to develop an image recognition tool that advises marine engineering officers when they are conducting their maintenance activities, with the aim to reduce their stress as a work risk prevention tool. Results showed adequate accuracy for three-layer Convolutional Neural Networks and balanced data, and the use of external cameras stands out for user-friendly applications.

In this study, we introduce our newly developed measurement-fed-perception self-adaption Low-cost UAV Coordinated Carbon Observation Network (LUCCN) prototype. The LUCCN primarily consists of two categories of instruments, including ground-based and UAV-based in-situ measurement. We use the GMP343, a low-cost non-dispersive infrared sensor, in both ground-based and UAV-based instruments. The first integrated measurement campaign took place in Shenzhen, China, 4 May 2023. During the campaign, we found that LUCCN's UAV component presented significant data-collecting advantages over its ground-based counterpart owing to the relatively high altitudes of the point emission sources, which was especially obvious at a gas power plant in Shenzhen. The emission flux was calculated by a cross-sectional flux (CSF) method, the results of which differed from the Open-Data Inventory for Anthropogenic Carbon dioxide (ODIAC). The CSF result was slightly larger than others because of the low sampling rate of the whole emission cross section. The LUCCN system will be applied in future carbon monitoring campaigns to increase the spatiotemporal coverage of carbon emission information, especially in scenarios involving the detection of smaller-scale, rapidly varying sources and sinks. [ABSTRACT FROM AUTHOR]

To ensure proactive and intelligent control of the electrical power generated in industrial units selfproducing energy, the construction of a data-driven model devoted to power prediction is an efficient solution that we have proven in this contribution. The remarkable added value of the paper was articulated around three main pillars: primarily, we have modelled a power station based on Rankine cycle that serves the energy needs of an industrial facility. Secondly, the connection of this plant to the public electric grid has been taken into consideration in modelling. Thirdly, we have used the model to avoid paying unwanted bills thanks to the forecasting of periods when there is an energy importation from grid. Before constructing the model, we have prepared a dataset composed of more than 25 million data points, reflecting the history of 3 years of archived data related to fifteen 15 features, in order to predict the target variable of this study. After finding that GRU and LSTM are among the most successful deep learning algorithms in energy prediction, we decided to use them in our particular application. Afterwards, a comparative study between them was first carried out on accuracy, where encouraging results were obtained on both sides, with respective scores of 98.73% and 99.36% during the training step, followed by 98.51% and 99.11% during the testing phase. Besides, the evaluation in terms of loss functions gave a convergence of the GRU model after 8 epochs, against 11 epochs for the LSTM algorithm. Therefore, we preferred to use LSTM in the definitive model because of its higher accuracy, providing that good computing power is used, so that the processing time could be acceptable by the endusers. Finally, we deployed the model to simulate a real case of forecasting the power drop one week in advance. In this case, we found that if the industrial unit had used the results of the model as a proactive decision support tool, it would have avoided importing 1456.4 MWh for 8 days from the national grid, which was equivalent to a loss of 119,094.8 USD. [ABSTRACT FROM AUTHOR]

This paper proposed a multi-objective-based Generation Expansion Planning (GEP) for the real-word power generation system of Tamil Nadu, an Indian state. GEP aims to solve numerous conflicting problems for constructing new power plants. The proposed approaches are Multi-Objective Comprehensive Learning Particle Swarm Optimization (MOCLPSO) and Circle Search algorithm. The key objectives of the proposed method is to reduce budget, to maximize reliability and to minimize the pollutant discharge. Therefore, the apt formulations are modeled and solved to establish the conflicting facets of GEP problem. This paper implements MOCLPSO algorithm to solve Multi-Objective GEP (MOGEP) problem for 7-year and 14-year planning horizon. By then, the proposed model is implemented at MATLAB/Simulink platform and the implementation is calculated. The proposed method shows better results in all approaches like Seagull Optimization Algorithm (SOA), Particle Swarm Optimization (PSO) and Cuckoo Search algorithm. The outcomes establish the competence of MOCLPSO and Circle Search Algorithm to offer good-ranged Pareto optimal non-dominated solutions. [ABSTRACT FROM AUTHOR]

The history of the construction and operation of the object of cultural heritage - the Kyiv Central Power Station (ЦЕС1), the second alternating current station in pre-revolutionary Russia, is considered. The development and improvement of electrical and thermal equipment, changes in the fuel base during the difficult times of the First World War, the revolution and the establishment of Soviet power in Kyiv. The transfer of the station to the control of the Academy of Sciences of the Ukrainian SSR, the beginning of research on MHD energy generation, the construction of the second largest research facility in the USSR for this technology began a new - scientific stage in the life of CES-1 as a scientific and experimental base of the Institute of Electrodynamics of the Academy of Sciences of the Ukrainian SSR. For now, the work of the team of scientists and engineering personnel is focused on thermal engineering problems of energy already within the framework of a separate Institute - thermal energy technologies of the National Academy of Sciences of Ukraine. This living monument of the era of industrialization (end of the 19th - 20th centuries) has complex significance for Kyiv and Ukraine: as a legacy of the history of energy and as an active experimental and technological complex. The history of the construction and operation of the object of cultural heritage - the Kyiv Central Power Station (ЦЕС1), the second alternating current station in pre-revolutionary Russia, is considered. The development and improvement of electrical and thermal equipment, changes in the fuel base during the difficult times of the First World War, the revolution and the establishment of Soviet power in Kyiv. The transfer of the station to the control of the Academy of Sciences of the Ukrainian SSR, the beginning of research on MHD energy generation, the construction of the second largest research facility in the USSR for this technology began a new - scientific stage in the life of CES-1 as a scientific and experimental base of the Institute of Electrodynamics of the Academy of Sciences of the Ukrainian SSR. For now, the work of the team of scientists and engineering personnel is focused on thermal engineering problems of energy already within the framework of a separate Institute - thermal energy technologies of the National Academy of Sciences of Ukraine. This living monument of the era of industrialization (end of the 19th - 20th centuries) has complex significance for Kyiv and Ukraine: as a legacy of the history of energy and as an active experimental and technological complex. [ABSTRACT FROM AUTHOR]

Adequately mixing of reactants is an important factor for efficient deNOx process in power station NOx emission control system. In this study, an experimental validated CFD simulation is conducted to investigate the effect of spray operation conditions on the mixing uniformity of reactant ammonia vapor in deNOx process occurring in a power station's furnace. According to the CFD simulation results, it is found that spray momentum ratio, initial droplet size and initial ammonia concentration all affect the mixing uniformity of ammonia vapor. Overall, a larger spray momentum ratio, larger initial droplet size and lower ammonia concentration contributes positively to the mixing uniformity. By comparing the same spray momentum ratio but different nozzle inlet velocity and furnace inlet velocity, it is found that the impact of spray momentum ratio mainly comes from furnace inlet velocity not nozzle inlet velocity. In addition, gravity should not be neglected. In the end, the method described in this study could provide a systematic way to study the effects of nozzle operation conditions on deNOx process. • Larger spray momentum ratio, larger droplet size and lower ammonia solution concentration improve the mixing of ammonia vapor in boiler • The effect of spray momentum ratio mainly comes from the flue gas velocity rather than the spray velocity • The gravity should be considered in the operation of SNCR system [ABSTRACT FROM AUTHOR]

Whole-aircraft coupled aerodynamics, flight dynamics, and structural dynamics models are commonly employed during the aircraft design process, generally increasing in fidelity, and associatively accuracy, as the design matures. While literature acknowledges the impact of explicitly representing the propulsion system in such models, it does not address the impact of structural idealizations on key metrics that inform early conceptual design. This paper investigates the impact of a range of propulsion system structural modeling strategies and their attendant idealizations on the accuracy with which key structural performance metrics may be acquired. A conventional tube-and-wing airframe with under-wing-mounted, high-bypass-ratio, turbofan propulsion systems is employed as a verification case. The lowest-fidelity modeling strategies defined herein are capable of acquiring airframe loads and vertical power plant center-of-mass inertial loads within ±2%. Higher-fidelity, predominantly 2D strategies are necessary for acquisition of propulsion system displacements, deformations, and power plant swing frequency within ±10% of a global finite element model. However, sufficient data must be available to allow the construction of higher-fidelity strategies during early design stages. [ABSTRACT FROM AUTHOR]

City riverbanks usually have great landscape value and are iconic public spaces. However, there are many cities with large abandoned industrial buildings, such as power plants, on their riverbanks. Such buildings run the risk of being demolished in order to recover the surrounding natural landscape, despite having an important presence in the collective memory of the citizens and in the history of the city. This article seeks to analyse the reuse and refurbishment of industrial power plants on riversides from a modern artistic/recreational approach in order to restore and enhance the landscape value of the site by regenerating the environs and turning them into hubs of activity. Two case studies from different locations are considered in order to extract the information. A methodology is used that allows us to analyse and study a complex reality in a straightforward, concise and direct way. That means it can be used by many agents currently involved in those reuse processes to compare and to monitor the different cases over time. This research has sought to highlight the power plant typology, its relationship with the riverside, and subsequently, to extrapolate the criteria used to study other industrial buildings. [ABSTRACT FROM AUTHOR]

The results of the processing of ash from the combustion of fuel oil after roasting with the addition of Na2CO3 followed by aluminothermic melting are presented. As a result, metallic nickel and vanadium slag were obtained. Studies of slag, metal, and deposits on the electrode were carried out. The resulting metal contains about 90 wt% Ni. The main phases of scurf on the electrode are a solid solution based on periclase (Mg1–x–y–zNixFeyVzO), sodium-magnesium vanadate (NaMg4(VO4)3), and substituted forsterite (Mg2–x–yFexNiySiO4). The processing of ash made it possible to significantly increase the concentration of vanadium and convert it into more soluble compounds. Vanadium amount increased from 16.2 in ash to 41.4–48.1 V2O5 wt% in slag. The solubility of vanadium was studied during aqueous leaching and in solutions of H2SO4 and Na2CO3. The highest solubility of vanadium was seen in H2SO4 solutions. The degree of extraction of vanadium into the solution during sulfuric acid leaching of ash was 18.9%. In slag, this figure increased to 72.3–96.2%. In the ash sample, vanadium was found in the form of V5+, V4+ compounds, vanadium oxides VO2 (V4+), V2O5 (V5+), and V6O13, and nickel orthovanadate Ni3(VO4)2 (V5+) was found in it. In the slag sample, vanadium was in the form of compounds V5+, V4+, V3+, and V(0÷3)+; V5+ was presented in the form of compounds vanadate NaMg4(VO4)3, NaVO3, and CaxMgyNaz(VO4)6; V3+ was present in spinel (FeV2O4) and substituted karelianite (V2–x–y–zFexAlyCrzO3). In the obtained slag samples, soluble forms of vanadium are due to the presence of sodium metavanadate (NaVO3), a phase with the structure of granate CaxMgyNaz(VO4)6 and (possibly) substituted karelianite (V2–x–y–zFexAlyCrzO3). In addition, spinel phases of the MgAl2O4 type beta-alumina (NaAl11O17), nepheline (Na4–xKxAl4Si4O16), and lepidocrocite (FeOOH) were found in the slag samples. [ABSTRACT FROM AUTHOR]

With the enhancement of environmental awareness, China has put forward new carbon peak and carbon neutrality targets. Electric vehicles can effectively reduce carbon emissions in the use stage, and some retired power batteries can also be used in echelon, so as to replace the production and use of new batteries. How to calculate the reduction of carbon emission by the echelon utilization of retired power batteries in energy storage power stations is a problem worthy of attention. This research proposes a specific analysis process, to analyze how to select the appropriate battery type and capacity margin. Taking the BYD power battery as an example, in line with the different battery system structures of new batteries and retired batteries used in energy storage power stations, emissions at various stages in different life cycles were calculated; following this in carbon emission, reduction, by the echelon utilization of the retired power battery, was obtained. Finally, the overall carbon emissions that might be reduced by echelon utilization in the future were calculated according to the BYD's battery loading volume and China's total power battery loading volume in 2021. This research provides a quantitative analysis idea for the carbon emission reduction of power battery echelon utilization. Using this method could improve the process of echelon utilization, optimize the supply chain of power batteries, drive the development of the new-energy vehicle industry, and explore new business models, so as to achieve the environmental protection goal of carbon neutrality. [ABSTRACT FROM AUTHOR]

This paper focuses on a model for increasing the power generation of a hydroelectric power station using the combined application of hydrokinetic turbines installed at the tailrace of the existing dam. Hydrokinetic turbines will capture additional power from the energy remaining in water currents exiting draft-tube outlets and tailrace of the dam. Two commercially available hydrokinetic turbines of different orientation were used for the analysis to theoretically estimate the increased power generation capability of Shiroro hydropower station using an array of 75, 150, 225 and 300 units. Preliminary results showed that at 50% reliability, combined-cycle hydropower can increase the generation capacity of Shiroro hydropower station by 2.5% and that there is a considerable power generation potentials that can be harnessed to augment existing output from the power station and alleviate the existing power problems in the country. [ABSTRACT FROM AUTHOR]

New data about the Mediterranean pycnogonids are given. For this contribution, we analysed 315 samples that until now had remained unidentified, collected in 1979–1980 in the Tyrrhenian Sea close to Torrevaldaliga, Italy. We found six species: Ammothella appendiculata, Anoplodactylus californicus, Endeis biseriata, Endeis spinosa, Nymphon gracile and Tanystylum conirostre. Two of them are the subject of taxonomical and faunal remarks: morphological features of Anoplodactylus californicus specimens are reported and discussed, and the first record of Endeis biseriata for the Mediterranean Sea is reported.

This paper focuses on a model for increasing the power generation of a hydroelectric power station using the combined application of hydrokinetic turbines installed at the tailrace of the existing dam. Hydrokinetic turbines will capture additional power from the energy remaining in water currents exiting draft-tube outlets and tailrace of the dam. Two commercially available hydrokinetic turbines of different orientation were used for the analysis to theoretically estimate the increased power generation capability of Shiroro hydropower station using an array of 75, 150, 225 and 300 units. Preliminary results showed that at 50% reliability, combined-cycle hydropower can increase the generation capacity of Shiroro hydropower station by 2.5% and that there is a considerable power generation potentials that can be harnessed to augment existing output from the power station and alleviate the existing power problems in the country.

It is well established that emissions from combustion of heavy fuels, light fuels and natural gas cause negative impacts on surrounding environment, including the erosion of antique buildings. This study investigates the effect of emissions from the Khoms Steam and Gas power station on the neighboring ancient city of Leptis Magna, using an air dispersion software (DISPER) to calculate the concentrations of sulfur oxides and nitrogen oxides in archaeological city under the influence of climate variables. The objective of this study is to calculate marble erosion rates caused by the chemical reactions on the surface of selected Marble structures. The study reveals high concentrations of the targeted pollutions on the surface's columns & status of the city. [ABSTRACT FROM AUTHOR]

Copyright of Architectus is the property of Oficyna Wydawnicza Politechniki Wroclawskiej 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.)

New data about the Mediterranean pycnogonids are given. For this contribution, we analysed 315 samples that until now had remained unidentified, collected in 1979–1980 in the Tyrrhenian Sea close to Torrevaldaliga, Italy. We found six species: Ammothella appendiculata, Anoplodactylus californicus, Endeis biseriata, Endeis spinosa, Nymphon gracile and Tanystylum conirostre. Two of them are the subject of taxonomical and faunal remarks: morphological features of Anoplodactylus californicus specimens are reported and discussed, and the first record of Endeis biseriata for the Mediterranean Sea is reported. [ABSTRACT FROM AUTHOR]

Power plants account for 42% of the total emitted carbon dioxide in Kuwait. To reduce global warming, it is necessary to capture carbon dioxide from the flue gas of power stations. In this paper, commercial polyethylene-oxide based membranes were simulated using a two-stage setup for the production of a stream containing 90 mol% of carbon dioxide. The compression and the vacuum systems were evaluated in this study in terms of the membrane area, flow of the captured carbon dioxide, power consumption, and capital investment. Results show that the compression system requires less membrane area but it was not economical due to the high energy requirement of the compressor. In the vacuum system, the membrane area increased by a fold of 30 but the energy consumption was reduced by 96%. It was concluded that the vacuum system reduced the capital cost by 63% in contrast with the compression system. Compared to other technologies such as amine scrubber and pressure swing adsorption, the vacuum membrane system can provide a very attractive solution for carbon dioxide separation with a capture cost of 30.1$ per ton. [ABSTRACT FROM AUTHOR]

The article shows results of researching the projects that exist in St. Petersburg. Constructive and cost parameters of power stations, which pass and distribute electric power were found and possibility to estimate the degree of parametric similarity of the project being devised with the analogues project by using the method of cluster analysis by homogeneity principle. It was found out that the procedure of clustering gives an opportunity to get homogeneous in quality samples of needed projects, which in its turn provides a chance to choose the nearest analogue and on its foundation to forecast the cost of the project. On the basis of the method of expert estimations and respective coefficients methodology of modeling the project cost was designed, whose goal is to evaluate the precise cost of the project, which differs from the analogue by parameters. This methodology can allow us with more trustworthiness to identify the future cot of the project and to give possibility to change the cost. The approach put forward by the authors is built on the basis of mathematic model data that speed up the process of selecting analogues and modeling cost of the project.

City riverbanks usually have great landscape value and are iconic public spaces. However, there are many cities with large abandoned industrial buildings, such as power plants, on their riverbanks. Such buildings run the risk of being demolished in order to recover the surrounding natural landscape, despite having an important presence in the collective memory of the citizens and in the history of the city. This article seeks to analyse the reuse and refurbishment of industrial power plants on riversides from a modern artistic/recreational approach in order to restore and enhance the landscape value of the site by regenerating the environs and turning them into hubs of activity. Two case studies from different locations are considered in order to extract the information. A methodology is used that allows us to analyse and study a complex reality in a straightforward, concise and direct way. That means it can be used by many agents currently involved in those reuse processes to compare and to monitor the different cases over time. This research has sought to highlight the power plant typology, its relationship with the riverside, and subsequently, to extrapolate the criteria used to study other industrial buildings.

In the event of accidents in power systems associated with a reduction in frequency in order to prevent the complete repayment of the energy district and accelerate the elimination of the accident, frequency division automatics (FDA) are used. Existing technical solutions for the implementation of the FDA do not always provide a balance of the generated and consumed power under the action of the FDA, since the current circuit-mode situation is not taken into account. The aim of this work is to develop effective algorithms for the functioning of adaptive FDA, which allocates power units of a power plant to a balanced load of an isolated energy district, taking into account the current circuit-mode situation. To achieve this goal, we use the method of structural and parametric synthesis of emergency control algorithms, which consists in creating a composite algorithmic model of adaptive FDA. The result of this work is the developed algorithmic model of an adaptive FDA of a power plant, consisting of input and processing algorithms for input analog signals of a FDA, algorithms for input and processing of input discrete signals of a FDA, algorithms for generating start-up organs of a FDA, algorithms for allocating a power plant to a balanced load of a power district. The proposed algorithm for the functioning of adaptive FDA is universal and allows you to automatically allocate power units of a power plant to a balanced load of an isolated energy district, regardless of the type of accident and its cause, the configuration of the electrical network and the values of electricity generation and consumption, as well as the current circuit-mode situation.

The results of the processing of ash from the combustion of fuel oil after roasting with the addition of Na2CO3 followed by aluminothermic melting are presented. As a result, metallic nickel and vanadium slag were obtained. Studies of slag, metal, and deposits on the electrode were carried out. The resulting metal contains about 90 wt% Ni. The main phases of scurf on the electrode are a solid solution based on periclase (Mg1–x–y–zNixFeyVzO), sodium-magnesium vanadate (NaMg4(VO4)3), and substituted forsterite (Mg2–x–yFexNiySiO4). The processing of ash made it possible to significantly increase the concentration of vanadium and convert it into more soluble compounds. Vanadium amount increased from 16.2 in ash to 41.4–48.1 V2O5 wt% in slag. The solubility of vanadium was studied during aqueous leaching and in solutions of H2SO4 and Na2CO3. The highest solubility of vanadium was seen in H2SO4 solutions. The degree of extraction of vanadium into the solution during sulfuric acid leaching of ash was 18.9%. In slag, this figure increased to 72.3–96.2%. In the ash sample, vanadium was found in the form of V5+, V4+ compounds, vanadium oxides VO2 (V4+), V2O5 (V5+), and V6O13, and nickel orthovanadate Ni3(VO4)2 (V5+) was found in it. In the slag sample, vanadium was in the form of compounds V5+, V4+, V3+, and V(0÷3)+; V5+ was presented in the form of compounds vanadate NaMg4(VO4)3, NaVO3, and CaxMgyNaz(VO4)6; V3+ was present in spinel (FeV2O4) and substituted karelianite (V2–x–y–zFexAlyCrzO3). In the obtained slag samples, soluble forms of vanadium are due to the presence of sodium metavanadate (NaVO3), a phase with the structure of granate CaxMgyNaz(VO4)6 and (possibly) substituted karelianite (V2–x–y–zFexAlyCrzO3). In addition, spinel phases of the MgAl2O4 type beta-alumina (NaAl11O17), nepheline (Na4–xKxAl4Si4O16), and lepidocrocite (FeOOH) were found in the slag samples.

A drainpipe of a gas–steam turbine combined cycle power plant leaked after served for only 64 months. The chemical compositions, metallographic structure and mechanical properties were qualified, and therefore, the leakage was not caused by material quality. The comprehensive analysis of leakage morphology and deposition revealed that the leakage was caused by under-deposit corrosion. The decarburization of metallographic structure was not detected, which indicated that H generated by cathodic reaction has not occurred, so that the under-deposit corrosion caused by H+ was ruled out. The deposition was the iron oxides. The substances (mainly Na3PO4) used for chemical cleaning absorbed in deposition resulted in occluded alkaline electrolyte and damaged the protective film of pipe wall, and electrochemical corrosion process caused the drainpipe failure subsequently. The process and mechanism of pipe wall thinning and leakage in the working medium without heating concentration and corrosion substances were revealed. The preventive suggestions were also proposed for such a failure. [ABSTRACT FROM AUTHOR]

With the enhancement of environmental awareness, China has put forward new carbon peak and carbon neutrality targets. Electric vehicles can effectively reduce carbon emissions in the use stage, and some retired power batteries can also be used in echelon, so as to replace the production and use of new batteries. How to calculate the reduction of carbon emission by the echelon utilization of retired power batteries in energy storage power stations is a problem worthy of attention. This research proposes a specific analysis process, to analyze how to select the appropriate battery type and capacity margin. Taking the BYD power battery as an example, in line with the different battery system structures of new batteries and retired batteries used in energy storage power stations, emissions at various stages in different life cycles were calculated; following this in carbon emission, reduction, by the echelon utilization of the retired power battery, was obtained. Finally, the overall carbon emissions that might be reduced by echelon utilization in the future were calculated according to the BYD’s battery loading volume and China’s total power battery loading volume in 2021. This research provides a quantitative analysis idea for the carbon emission reduction of power battery echelon utilization. Using this method could improve the process of echelon utilization, optimize the supply chain of power batteries, drive the development of the new-energy vehicle industry, and explore new business models, so as to achieve the environmental protection goal of carbon neutrality.

In recent years an active growth of renewable energy production in the world has been observed. The peculiarity of our country is the presence of a large number of natural energy resources which put Ukraine among the electricity exporting countries, on the one hand, and the availability of virtually all types of renewable energy production (solar energy, hydropower (large and small), wind, etc.), on the other one. So we made an analysis of possibilities of an introduction the renewal energy from 1% of total energy production we have now to a bigger number and proposes the steps to achieve this goal. Given the statistic and existing situation in energy market, the resource base for renewable energy sources and local fuels is large and sufficient for a significant increase in the energy efficiency and the reliability of Ukraine's energy supply, and can be the basis for the transition to clean energy for the future.

Copyright of Journal of Ballistics / Dandao Xuebao is the property of Journal of Ballistics Editorial Department 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.)

Sustainable power source advancements range from the entrenched, for example, hydropower, to the developing a breeze sun oriented mixture framework. Every innovation has its own individual instrumentation necessities to quantify and control framework factors. The expansion of the new LabView module to the framework gives the truly necessary ongoing data on the framework factors, for example, wind speed, wind bearing, dc power, air conditioning power, air conditioning/dc voltages, and flows. This continuous information procurement framework is being utilized broadly to furnish the understudies with an active research center experience identified with electrical, gadgets, and instrumentation. In this paper, conversations on numerous parts of information securing, instrumentation, interfacing, and writing computer programs depend on a current 1.5 kW wind-sun based half breed power station. [ABSTRACT FROM AUTHOR]

Concentration levels of 12 PCB congeners (PCB-18, 28, 31, 44, 52, 101, 153, 118, 138, 149, 180 and 194) were determined in soil, dust, sediment and water samples collected at Ijora Olopa Power Station, Lagos, Nigeria. The calibration factors of target PCBs were estimated to test the linearity of the GC-ECD within a concentration of 0.025 ng/µL to 0.400 ng/µL. RSD of the calibration factors ranged from 4.6% to 12.3%, indicating a good response. Mean total PCBs in samples increased in the order water

Frequency response analysis is widely used as a method for the offline diagnosis of winding deformations in power transformers. To apply it to a working transformer, people need to determine how to inject the excitation signal and measure the response signal for windings that bear a rated voltage and current. In this study, a method to obtain the frequency response curve online is proposed. It uses the principle of magnetic field coupling to inject a frequency sweep signal into the windings through a Rogowski coil. Another Rogowski coil sensor placed at the root of a high-voltage bushing is used to measure the response current signal. Experiments on a 72.5 kV bushing show that metal accessories of the bushing have no influence on the injection or the measurement. The feasibility of this method was verified by experiments on charged 110/35/10 kV transformers at a factory and a working 35 kV transformer in a power station. The results show that it is safe to install the Rogowski coil at the root of the high-voltage bushing. The excitation signal can be injected into live windings and the response signal is measurable. Strong electromagnetic power frequency noise can be reduced and the frequency response curve can be measured online.

This article deals with an analysis of research literature focused on the electrification of the country in the 1920s - early 1930s and the main directions in the development of foreign and domestic historiography on the given subject. Most sources on the New Economic Policy (NEP) and industrialization do not mention the plans of comprehensive electrification of industry and agriculture. In this respect, the article analyzes the fundamental role of electrification in the country’s development. Despite the prevailing opinion in the literature that the high industrial potential of pre-revolutionary Russia was the critical factor in the electrification of the country, the article demonstrates the determining role of the executive corps. Because the entire array of issues related to the repressive politics of the government toward technical specialists and executives in the energy field has remained outside of the scientific analysis in Russian historiography, the article addresses questions concerning the mass use of prison labor during the construction of energy facilities and the search for participants in the subversive conspiracy at the energy enterprises in the early 1930s. The significance of the article consists in the fact that the challenges in the development of the energy complex in the USSR at the turn of the 1930s have emerged with new intensity in the contemporary energy sector of Russia.

Weirs are barriers built across rivers for a wide range of other purposes than hydropower production. Like hydropower installations, weirs can negatively impact fish migrations. Downstream migration and mortality of Atlantic salmon smolts were studied during passage of a weir and power station by tagging 227 smolts with radio transmitters. Extra loss of smolts due to the weir and adjacent reservoir was 5.2%. Mortality was likely related to physical damage imposed to the smolts and/or increased predation risk. Extra loss of smolts did not differ between the weir and the power station (7.2%). Migration speeds were reduced at the power station but not at the weir. We conclude that mortality at one power station site may differ considerably among years, because the mortality was more than four times higher in a previous year than in this study. Increased river discharge seemed to decrease mortality and increase migration speeds at the power station. [ABSTRACT FROM AUTHOR]

In order to explore the noise reduction effect and application of different hearing protectors in different workplaces in a power station, so as to facilitate to select differently suitable hearing protectors to staff based on needs. This paper uses principal component analysis and evaluation according to the insertion loss test results of 112 kinds of hearing protectors. Combined with the field test results of 10 workplaces in a power station, it is found that 112 kinds of hearing protectors mostly are suitable in 7 working places. People need to select suitable hearing protectors specifically in other 3 places. At the same time, this paper can provide reference for the selection of hearing protection in other different working places. [ABSTRACT FROM AUTHOR]

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