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Reducing energy demand through energy efficiency (EE) policies is a key strategy in dealing with climate change and the energy needs of Southeast Asian countries (ASEAN). The industrial sector is the largest energy user sector and has significant energy-saving potential through good and sustainable energy management. This research is intended to analyze the progress of energy-saving programs in several ASEAN countries through policies that have been made with a focus on large industries. Five steps will be carried out, namely: searching for data on total population, GDP and total final energy consumption; conducting analysis with indicators of energy intensity, per capita energy consumption and GDP productivity; comparing the EE programs of ASEAN countries; designing savings strategies; and determine sustainable energy indicators. As a result, the energy consumption of ASEAN countries during the 2016 to 2020 time period has mostly increased. The policies that have been taken have similarities such as the implementation of energy audit and management, the application of minimum equipment performance standards, and the funding of the EE program. ASEAN countries need cooperation and coordination to ensure readiness in welcoming the energy transition.

Vegetables can be extended their shelf life by processing them into vegetable flour. Flour processing technology is inseparable from the drying process which means removing water from a material until it reaches a certain moisture content. This study aims to determine the effect of various temperatures at various stages of drying on the characteristics of the material to become mustard green flour. Drying it using a cabinet dryer at temperatures of 45 oC, 55 oC, and 65 oC. Observations were made at 0 h of drying (analysis of raw materials), 2 h, 4 h, and after turning into mustard green flour. The results showed that the drying temperature had an effect on the changes in the characteristics of the material during the drying process until it turned into mustard green flour. During the drying process, there was a decrease in moisture content, ash content, total chlorophyll, and physical color of the mustard green flour. Drying temperature has an effect on decreasing moisture content, ash content, total chlorophyll and physical color of mustard green flour, while drying time affects total chlorophyll and physical color of mustard green flour.

This study aims to assess hybrid solar drying method for processing red pepper compared to sun drying and solar drying. Independently selecting heat variables of 40 °C, 50 °C, 60 °C, 70 °C, and 80 °C, the temperature profiles, drying curves, thermal efficiency and effectiveness, and energy and exergy were analyzed to meet the standardized moisture content of the product as well as other features (color, vitamin C content, and β-carotene content). It was found that the drying rate decreased when the temperature rose, while the drying chamber efficiency and drying effectiveness were inversely proportional to the duration. The collector became the most efficient at 40 °C. The drying air temperature is directly proportional to utility, energy efficiency, exergy input, exergy ouput, exergy loss, exergetic efficiency, and development potential while inversely proportional to the energy utilization ratio. Drying red pepper with a hybrid solar dryer at all observed temperatures was deemed able to meet the nationally standardized water content of ≤ 10.78 %. Processing red pepper at 80 °C resulted in the L, a, and b values of color analysis of 30.37, 27.45, and 10.63 respectively, vitamin C content of 14.79 g 100 g–1, and β-carotene content of 4.43 mg 100 g–1.

One crucial period in the provision of food for Hajj/Umrah is the time between opening the package and consuming it by the pilgrims. This study aimed to determine the sterilization time to prevent damage and maintain acceptance by consumers. The methodology of this research was sterilization with variations in retort pressure settings and raw materials: (A) 1.8 bar pressure, 100 % skipjack; (B) 1.2 bar pressure, 90 % skipjack; (C) 1.2 bar pressure, 70 % skipjack; (D) 1.8 bar pressure, 50 % skipjack. The analysis included two components. The (i) was the determination of the adequacy of sterilization time, the (ii) was the observation of quality deterioration, which was based on organoleptic and Total Plate Count. The results showed that the adequacy of sterilization for variations A, B, C, and D was: 121.5 °C for 4.8 min; 114.5 °C for 4.8 min; 115.4 °C for 5.31 min, and 124.0 °C for 13.4 min. TPC analysis, which was carried out at 0 h, 3 h, 9 h, and 12 h in a row were 4 × 100, 2 × 102, 2 × 102, and 3 × 103. In terms of consumer acceptance, sterilized products have good values, with organoleptic values ranging from 7.8 to 8.2 (scale 1 to 10).

This study aims to obtain the incentives strategy that can increase the participation of energy users greater than or equal to 6000-TOE in fulfilling their obligations on energy conservation through energy management with Sustainable Energy Performance (SEP). Several steps need to be carried out. First, data collection on industries that must carry out energy management, and will be analyzed to determine the level of compliance of energy users. Second, ensure that already have carried out an energy-saving program with the SEP. Third, formulating incentive schemes for energy users. Fourth, the interest deduction for the company when they implement the SEP. The results show that only 10.25 % fully comply with the regulation, 36.89 % are partially compliant and 52.87 % are not compliant with energy management activities at all. For industries that have implemented energy conservation and SEP, several benefits are obtained, including capital expenditure (capex) savings when purchasing new imported equipment for creating another energy efficiency, by up to 30 % and incentives in the form of lowering interest rates by up to 4 %.

Hebel brick is used in making the walls of the house. One of the materials used in making hebel bricks is sand. The water content of the sand will affect the quality of the hebel bricks. The less water content in the sand, the better the quality of hebel bricks. In order to get sand with a little water content, it is necessary to do the drying process. To overcome this problem, a rotary dryer for sand drying using renewable energy, particular biomass energy sources was designed. It can be placed in a sand quarry near a river or near a beach. It is designed to have the ability to dry the wet sand by putting it in a rotary dryer, making this drying system usable both in sunny and rainy conditions. The drying process can take place continuously using heat from biomass energy. The heat is produced from the combustion process in the biomass furnace and then distributed to the rotary dryer. The advantage of this rotary dryer system could be done continuously with a little human power. Moreover, from these calculations can be analyzed the performance of this rotary dryer machine, to determine the suitability between design calculations and test results.

Sheet Glass Industry is one industry that uses 75 % natural gas energy and 25 % electricity. Using the Intergovernmental Panel on Climate Change, IPCC-2006 emission calculation method, the average greenhouses gas (GHG) emissions obtained from the calcination process obtained 112 211 t CO2 yr–1 per plant and an average emission factor (EFkl) of 0.18 CO2 t–1 yr–1 of pull. With the technology of converting heat into electrical energy, residual combustion as flue gases has the potential to be used to produce electrical energy. Referring to the analysis and calculation; one of factories has potential to generate 0.8 MW to 3 MW electric energy. It’s efficiency of 10 % to 40 % so that it can be calculated as a component of GHG emission reductions whose value is 4.6 t CO2 yr–1 to 18.7 t CO2 yr–1 per plant. With this reduction, each of the GHG emission and emission factors per plant dropped to 93 442 t CO2 yr–1 and 0.16 CO2 t-pull–1.

The purpose of this study is to perform the techno-economic analysis of photovoltaic system utilization for lighting and cooling of Ferry Ro/Ro 500 GT. The world is facing a dilemma of increasing dependence on fossil energy with decreasing supply. This situation must be anticipated by all sectors by energy efficiency (EE) and utilizing renewable energy (RE). Especially for RE in the transportation sector, ships as consumers of oil energy can also take advantage of solar energy sources, for example for lighting and cooling. For that purpose, five steps must be taken. First, determine the design specifications. Second, determine the specifications of components of the PV system. Third, calculate the power required for lighting equipment. Fourth, calculate the power required for the cooling system. Fifth, make an investment comparison for propulsion systems between diesel engines and photovoltaic systems. The results show that the energy required for lighting and cooling system as well as for propulsion systems can be placed in the deck area of 148.8 m2 for all system components, such as; PV modules, charge controllers, batteries, and inverter. This study can provide an overview of the use of PV system in designing the environmentally new or renovation ships.

The purpose of this study is to conceptualize an urban Hi-Tech Cook-Stove (HTCS) design using agricultural waste. Several steps need to be carried out. First, determine the cooking activities depend on the family size and food categories. Second, calculate the energy required for cooking. Third, determine the mass of biomass fuel required. Fourth, calculate the fuel consumption rate. Fifth, design the dimensions of the stove by considering the ergonomics, easy in manufacturing, installation, etc. Sixth, estimate the volume of each component. The result shows that the fuel supply must adjust the flow rate of fuel, air to fuel ratio controlled by a simple mechanical-electric compressor, monitor the combustion chamber visually/automatically, and the dust must be collected/disposed of automatically/mechanically. HTCS must consider the pellets from the higher heating value and faster of biomass with a certain composition of chopped and fibre, also the safety and comfort, such as overheating control, air exhaust control, combustion control, cooling control. For the future, the HTCS technical design concept must be integrated with the electricity and hot water from solar energy by using a hybrid photovoltaic-thermal (PVT) collector and urban biogas digester in the development of smart grids and smart cities.

The need for beef in Indonesia continues to increase. In 2020, it will require imports of 300 thousand t of meat or the equivalent of 1.7 × 106 cattle a year. To overcome the problem, the biogas-energized livestock feed making machine (copper) was designed. The advantage of this copper is the process of making the livestock feed can efficient and effective. Results of the calculations, known that with increasing miller rotation output, the resulting capacity shows an increase. Also, it can use drive motors that are available on the market with a power capacity of 50 W. Hence; this machine is very efficient in the use of electricity, high economic value, convenient and easy move to other places. Electricity for the engine is designed with renewable energy, namely biogas from co-digestion substrates namely animal feed waste, kitchen waste, cow dung and excreta disposal from septic tanks. This co-generation is expected to improve the life of the breeders

Estimation of the energy demand in Indonesia will increase by 8.15 % annually until 2030. Indonesia is committed to preventing climate change through mix energy (new and renewable energy). One of the sources of this energy is waterpower plants with a potential of 75 091 MW have been utilized 6.4 %, mini-hydro, and micro-hydro with a potential of 19 385 MW have been utilized 1 %. In the Industrial Revolution 4.0, it is doable to identify such potential using drone. This study was conducted in the Kalibawang irrigation area, Special Region of Yogyakarta, Indonesia. The procedure starts with the generation of detailed Aerial Photography using Drone DJI Phantom 4. The images from aerial photography were then processed into high-resolution Digital Elevation Model (DEM). DEM data represent the study area topography and can be used to identify the stream gradient potential or height difference (H). Six potential points were identified with height differences between 3 m to 8 m, resulting in the potential generated power ranging from 125 kW to 334 kW. This study demonstrates the identification of micro-hydro energy potential points, height difference, and generated power using Drone. Six points were identified with total potential energy 1 418 kW.

The purpose of this study is to conceptualize Indonesia’s ICT-based energy security tracking system with detailed indicators of renewable energy (RE) and energy efficiency (EE) from the smart city extension. The opportunities for improvement to the energy security system is still wide open with the support of advances in information and communication technology (ICT) to integrate the internet and smart grid. The method refers to five main dimensions: availability, efficiency, affordability, sustainability, and governance. Then, how to link the concept of energy security with detailing indicator of RE and EE to the smart city. Empirically, energy security is a function of availability, efficiency, affordability, sustainability, and governance. The most important dimension is the Government (Go) to realize the interconnectivity and the information. If the Go has been realized, the other four dimensions will be easily obtained. With the development of ICT, the energy security status will certainly be more easily accessed anytime and anywhere by the stakeholders. The concept of a smart city usually integrated with the ICT infrastructure, especially for monitoring, management and decision-making tool. This research provides an overview of how the concept of energy security system is closely related to the implementation of the smart grid.

The aim of this research is to determine the performance of PV panels, wind turbines, battery storage and power imported from the grid to the system which will ensure a reliable energy supply, as well as the technical feasibility of a smart microgrid system. Indonesia’s renewable energy potential for electricity reaches 443 GW, where solar energy is the largest potential, namely 4.8 KWh m–2 or equivalent to 112 000 GWp, but only 10 MWp has been utilized. The most basic problem in this system, namely, the uncertainty of wind energy and solar energy, one of the most vital factors in the optimal size of a renewable energy-based smart microgrid system is the reliability of the system being built. The method used in this research is to collect data on the availability of wind energy and solar energy as well as load analysis on the smart microgrid system. As a result, the resulting power output was 6.2 MWh during the experiment. The highest average Performance Ratio (PR) of the solar energy power generation system, namely 77 % in February 2020. Optimized with Battery Life (OBL) model produces a power output of 102.4 kWh and has an overall system efficiency of 81.92 %.

Indonesia is an archipelago that has a wealth of marine fish resources, and the country with the second-longest coastline in the world. The improvement witnessed in the economy of Indonesia in recent years, is as a result of the growth experienced in various sectors, among which is the fisheries and marine. To overcome this problem, a portable conveyor system of moving equipment for fishermen’s catches was designed. It can be placed at the dock or port where the fishermen are anchored and unloading the fishermen’s catches from the sea. It designed to have the ability to move up and down in the moving frame, making this conveyor system can be used both in high tides and low tides of seawater level conditions. The advantage of this portable conveyor system is could be done continuously with a little human power. Other than that, from the results of the calculations, known that with increasing motor rotation, the required traveling time will only become shorter. The resulting conveyor capacity shows an increase. Also, it can use drive motors that are available on the market with a power capacity of 0.37 kW. Therefore, the process of this portable conveyor system can be more efficient.

Pico hydro or a small scale hydroelectric power plant is used as the rotating energy of the generator. Pico hydro is a hydroelectric power plant that has a power of less than 5 kW. Technically, Pico hydro has three main components namely water, turbine and generator. Turbine type propeller reaction has a special profile that causes a decrease in water pressure during the blades. This pressure difference exerts force on the blade so that the runner (rotating part of the turbine) can rotate. Permanent magnets are used to produce magnetic flux. Permanent magnets used are rare-eatrhrod magnet material, neodymium-iron-boron NdFeB with N35 type. The planned generator released is 36.85 V, 500 rpm, 50 hz. This designed water turbine has four blades which cannot change its angle. As for the measurement results produce a voltage of 35.1 V with a manufacturing efficiency of 95 %. Charging the battery voltage must be more than 12 V, therefore the generator must be turned at least 200 rpm with a voltage of 14 V to be used for charging batteries.

The purpose of this study is to analyze the potential for energy savings because the laundry industry consumes a lot of energy and water. If the laundry industries are not controlled, it will cause serious environmental and energy problems. The audit activity was divided into three stages. Pre-audit stage, the auditors were divided into groups with clear details of tasks and responsibilities, starting with conducting energy audits on the floor, analyzing statistical data, and process flow. Site audit stage; conduct an audit on the floor from the beginning to the end of the process, then collecting and confirming the statistical data for energy and production. Post-audit stage, complete the audit report that will be submitted or presented to the laundry management, which consists of; audit findings with loss or savings analysis, accompanied by recommendations for further improvement. The results show that there are many savings opportunities, especially by overcoming the energy wasted in the production process. Improvements can be made by overcoming energy waste and controlling energy consumption and production more efficiently, implementing renewable energy technology such as solar dryer and hybrid photovoltaic and thermal (PVT) collector, and then considering industrial revolution 4.0 with IoT and ICT.

The purpose of this paper is to prove that waste palm oil industry (POME) can be used as raw material (source of energy) for biodiesel. In the production process, palm oil mill produced large amounts of waste. The provision of a shelter pond system is a temporary solution from palm oil mill to relocate the liquid waste. With BOD content with range 25,625 to 39,616.7 mg/l and COD content with range 117,333.3 to 146,333.3 mg/l, this condition will generate a serious problem for environmental pollution. Therefore, it is important to test the characteristics of waste oil from each pond. The hexane solvent extraction method is used to separate the oil from the liquid waste. The first pond contains 51.3% water, 21% oil, 2% sludge & sediment and 5.6% free fatty acids. The second pond contains 86.7% water, 16.1% oil, 2.4% sludge & sediment and 8% free fatty acids. The third pond contains 74% water, 6.8% oil, 3.1% sludge & sediment and 12.2% free fatty acid and the fourth pond contains 78.7% water, 3.7% oil, 2% sludge & sediment and 13.3% free fatty acids. Based on the results of this research, the characteristics of POME and its oil losses are the fraction of oil wasted from Crude Palm Oil (CPO) processing, whereas CPO has characteristics as a raw material for Biodiesel. POME should be processed into biodiesel since the liquid waste is discarded from palm oil mill, so there is no need a big land to make waste storage ponds.

Biomass from EFB is considered as potential renewable energy sources to be developed in Indonesia. EFB can be efficiently converted into valuable and useful gaseous products through gasification. Research about EFB gasification in various gasifier has been done, though little research about EFB simulation on CFB bed gasifier. The aim of this research is to simulate gasification of EFB on CFB gasifier by assuming that the gasification reaction isunder equilibrium condition. Method encompasses biomass feedstock, simulation basis manager, process description, simulation description, model validation, and sensitivity analysis. The model predicts H2 and CO fraction on syngas product in agreement with published real CFB gasification operation. The result shows that CFB gasifier performance is improving at high temperature above 800°C., and syngas conversion is higher under high temperature.The highest H2 yield achieved at 800°C.Impact of S/B has been investigated, and it is found that when value of S/B is increasing, the more H2 produced. The value of ER below 1 is desired since the focus is to get CO together with H2. The lower ER value the higher syngas yield obtained. The model will be used as a basis for further chemical production simulation from EFB gasification.