Source Of Electrical Energy Research Articles

Penerapan Lampu Penerangan Jalan Umum Otomatis Tenaga Matahari di Nagari Lagan Mudik Punggasan

Street lighting is needed to ensure road users' smooth running and safety. Lack of light will create a high risk of accidents and crime on the road. Many areas in Indonesia in general and West Sumatra in particular, mainly rural areas, still need street lighting due to the need for regional capacity to provide lighting on public roads. This activity implemented street lighting in Nagari Lagan Mudik Punggasan, Linggo Sari Baganti District, Pesisir Selatan District, West Sumatra Province. A total of five light units have been installed in four different locations. Installation of lights using a pole made of wood as high as 4 meters on the 20 KV distribution electricity post and the welcome board of the village. The lights work automatically and can be active when dark and off when bright. The lamp's working principle utilises solar panels, which produce electricity during the day. The source of electrical energy used by the light comes from a battery that a solar panel has charged. This system is expected to overcome the village's lack of street lighting and use clean, environmentally friendly energy sources.

Analysis of Solar Cell Potential in Building I of Pembangunan Panca Budi University

Solar thermal energy is very abundant in areas that have a tropical climate such as in North Sumatra Province which is always exposed to sunlight throughout the year. It is a source of energy that has the potential to be developed. Solar Power Plants (PLTS) generate electricity from solar cells that are exposed to sunlight. The high and low voltage generated depends on the amount of sunlight hitting the solar cell panel. Building I of Pembangunan Panca Budi University uses a source of electrical energy from PT. PLN as the only primary source to run all the facilities in the building. The obstacle that is often experienced is when there is a blackout or cessation of the supply of electrical energy from PLN. All equipment that uses electrical energy stops working due to the absence of electricity.The research method is to collect data in the field, analyze the collected data and analyze the factors that influence the intensity of the sun. The number of solar cell panels used is 189 units with a capacity of 250 Wp with the area required for solar cell panel installation is 189 x 1.7 = 321.3 m². The use of solar cells as a source of New, Renewable Energy (EBT) is one of the alternative energy sources which is expected to be able to meet the demand for electrical energy in Building I Pembangunan Panca Budi University.

Study of a Regional Turboprop Aircraft with Electrically Assisted Turboshaft

Hybrid-Electric Propulsion (HEP) could be part of the solution to decrease emissions associated with regional commercial aviation. This study presents results for the aircraft level fuel reduction potential of a regional turboprop concept with an HEP architecture and Entry-Into-Service (EIS) in 2035+. The configuration specifically tackles the elaborated challenges of introducing an additional electrical energy source to the configuration by employing a twofold electrical assistance to a turboshaft engine in combination with an innovative thermal management concept. Relevant components and disciplines were modeled and incorporated into an integrated aircraft design environment. The behavior and interaction of the HEP architecture with the aircraft was thoroughly investigated. A best-performing configuration was derived and compared with a conventional reference configuration following a State-of-the-Art (SoA) reference aircraft approach. For a typical mission with 200 nmi range, a block fuel reduction of 9.6% was found. However, the assumed battery performance characteristics limited the reduction potential and led to a fuel burn increase for the 600 nmi design mission. Furthermore, sourcing the non-propulsive subsystems directly from the on-board battery was detrimental. The innovative Thermal Management System (TMS) located in the propeller slipstream showed a synergistic effect with the investigated configuration.

Passive electrochemical hydrogen recombiner for hydrogen safety systems: prospects

This paper presents the concept of a passive electrochemical hydrogen recombiner (PEHR). The reaction energy of the recombination of hydrogen and oxygen is used as a source of electrical energy according to the operating principle for hydrogen fuel cells to establish forced circulation of the hydrogen mixture as an alternative to natural circulation (as is not utilized in conventional passive autocatalytic hydrogen recombiners currently used in nuclear power plants (NPPs)). The proposed concept of applying the physical operation principles of a PEHR based on a fuel cell simultaneously increases both productivity in terms of recombined hydrogen and the concentration threshold of flameless operation (the ‘ignition’ limit). Thus, it is possible to reliably ensure the hydrogen explosion safety of NPPs under all conditions, including beyond-design accidents. An experimental setup was assembled to test a laboratory sample of a membrane electrode assembly (MEA) at various hydrogen concentrations near the catalytic surfaces of the electrodes, and the corresponding current–voltage characteristics were recorded. The simplest MEA based on the Advent P1100W PBI membrane demonstrated stable performance (delivery of electrical power) over a wide range of hydrogen concentrations.

Sorbent-coated carbon fibers for direct air capture using electrically driven temperature swing adsorption

•Sorbent-coated carbon fibers exhibit rapid temperature swing by Joule heating •The DAC system can fully regenerate in under 10 min •Wind-driven DAC modules recover CO2 product from the air at ∼82% purity •The cost of CO2 from this wind-driven DAC system is projected to be ∼$160/tonne Direct air capture (DAC) by electrically driven temperature swing adsorption (ETSA) is an emerging technology due to its simplicity and ease of pairing with renewable electricity energy sources. Herein, we describe the preparation of sorbent-coated carbon fibers via roll-to-roll process that exhibit 400 ppm CO2 adsorption of ∼1.2 mmol gfiber−1. The fibers exhibit Joule heating upon application of a potential, reaching CO2 regeneration temperatures within 1 min. DAC modules show fast electrothermal CO2 desorption with directly applied electric potential, releasing the adsorbed CO2 six times faster than externally driven thermal desorption. The simplicity and modularity of the sorbent-coated carbon fibers and their rapid adsorption/desorption cycling by ETSA have the potential to improve the productivity of DAC systems. A techno-economic analysis of a pilot-scale ETSA-DAC system projects an overall cost of about 160 $ tCO2−1, with convective energy losses to the ambient accounting for only 7% of the Joule heating input during desorption. Direct air capture (DAC) by electrically driven temperature swing adsorption (ETSA) is an emerging technology due to its simplicity and ease of pairing with renewable electricity energy sources. Herein, we describe the preparation of sorbent-coated carbon fibers via roll-to-roll process that exhibit 400 ppm CO2 adsorption of ∼1.2 mmol gfiber−1. The fibers exhibit Joule heating upon application of a potential, reaching CO2 regeneration temperatures within 1 min. DAC modules show fast electrothermal CO2 desorption with directly applied electric potential, releasing the adsorbed CO2 six times faster than externally driven thermal desorption. The simplicity and modularity of the sorbent-coated carbon fibers and their rapid adsorption/desorption cycling by ETSA have the potential to improve the productivity of DAC systems. A techno-economic analysis of a pilot-scale ETSA-DAC system projects an overall cost of about 160 $ tCO2−1, with convective energy losses to the ambient accounting for only 7% of the Joule heating input during desorption.

Rancang Bangun Automatic Transfer Switch (ATS) Hybrid Daya PLN Dan PLTS Pada Sistem Hidroponik

Hydroponic system requires continuous circulation of water to grow plants. To prevent the risk of stopping the circulation of this water, another source of electrical energy is used to backup power sources if there is a blackout at PLN. So, in this research Automatic Transfer Switch (ATS) system was designed in Hydroponics to maintain water circulation. In which this ATS has a contractor that two power sources that can flow and cut off electric current, which is also connected to the MK2P Relay as an inverter switch, and the MCB as a component protector. The backup power source is used by PLTS connected to the inverter, where the inverter is supplied by a battery that is charged by solar panels as a backup power source. The results of this design show that the transfer delay from PLN to PLTS for about 1,52 seconds and PLTS to PLN is 5.40 seconds. The delay is caused by TDR delay set for about 5 seconds to connected to PLN. As well as the reliability that results form this system is also balanced and can provide electric voltage u to 100% performance with experiments using different delays such as 1, 2, 3, 4, and 5 seconds for 10 trials which can turn on a maintain water circulation on hydroponics.

Assessment of thermodynamic performance of a novelty solar-ORC configuration based hydrogen production: An experimental study

In this study, a solar-Organic Rankine Cycle (ORC) assisted hydrogen production system was experimentally investigated. An evacuated tube heat pipe solar collector (ETHPSC) was used for thermal energy generation. The tubes used in this study were produced differently from the tubes of the conventional heat pipe. The condenser area of the vacuum tubes used was made of glass instead of copper. Moreover, acetone was used as the fluid in the tube. The thermal energy obtained from the collector was used as a heat source for electrical energy in the ORC system. A uniquely designed ORC system is modeled and manufactured. The electrical energy obtained from the ORC unit was used for hydrogen production by means of the proton exchange membrane electrolyzer (PEMe). As a result of the study, two different efficiency analyses were made. If all of the electricity produced in the S-1 scenario was spend on hydrogen production, the energy and exergy efficiency were calculated as 3.45% and 2.15%, respectively. In the S-2 scenario, if some of the electricity produced was spend on hydrogen production, the energy and exergy efficiency of the whole system were found to be 0.01446% and 0.002146% respectively. In addition, 0.000004433 kg/s hydrogen production was obtained from the presented system.

Load Regulation Strategies of Solid Oxide Electrolysis System Coupled with External Heat Sources

Solid oxide electrolysis system requires electrical and thermal energy. Five scenarios are defined according to various cases of external heat sources coupling and electrical energy sources. Three methods are proposed to track variations in electrical or thermal load, including constant flow rate (F method), constant steam utilization (Us method) and constant cell operating voltage (V method). Through system process simulation, the applicability of three methods in different scenarios is explored to obtain load regulation strategies. In the scenario coupled with low-temperature heat and intermittent power and the scenario with no heat coupling, the F method is preferred at high loads and the V method is preferred at low loads, while it is the opposite in the scenario coupled with high-temperature heat and intermittent power. The V method is preferred at low loads in the scenario coupled with low-temperature heat and high loads in the scenario coupled with high-temperature heat.

The diversity of energy consumption structure, energy efficiency and carbon emissions: Evidence from Shaanxi, China.

As a major energy sources province in China, Shaanxi Province ranks top three in terms of raw coal production in China and undertakes the important task of ensuring national energy supply and security. Affected by the endowment of energy resources, fossil energy accounts for a large proportion of the energy consumption structure in Shaanxi Province, and it will face huge challenges under the severe carbon emission situation in future. In order to analyze the relationship between energy consumption structure, energy efficiency and carbon emissions, the paper introduces the concept of biodiversity into the energy industry. Taking Shaanxi Province as an example, the paper calculates the energy consumption structure diversity index and analyzes the impact of energy consumption structure diversity on energy efficiency and carbon emissions in Shaanxi Province. The results shows that the diversity index and equilibrium index of energy consumption structure in Shaanxi exhibits a slow upward trend in general. In most years, energy consumption structure diversity index in Shaanxi is higher than 0.8, and the equilibrium index is higher than 0.6. The carbon emissions of energy consumption in Shaanxi generally show increasing trend, and the carbon emissions have increased from 5,064.6 tons to 21899.67 tons from 2000 to 2020. The paper also shows that Shaanxi H index is negatively correlated with total factor energy utilization efficiency in Shaanxi, and positively correlated with carbon emissions in Shaanxi. The main reason is the internal substitution of fossil energy, and the proportion of primary electricity and other energy sources is still relatively low, which leads to a higher level of carbon emissions.

The acceptance of nuclear energy as an alternative source of energy among Generation Z in the Philippines: An extended theory of planned behavior approach

Nuclear Power Plants (NPP) are widely utilized around the globe from different base forms as it is one of the most dependable renewable resources that technological advancements have offered. However, different perceptions of the usage of NPPs emerged from different generations. The purpose of this study was to investigate the acceptance of nuclear energy as an alternative source of energy among Generation Z in the Philippines by utilizing an extended Theory of Planned Behavior (TPB) approach. An online questionnaire which consisted of 31 items was distributed using a purposive sampling approach and 450 respondents of Generation Z voluntarily answered. Structural Equation Modeling (SEM) showed that the knowledge regarding NPP had significant effects on risk perception and benefit perception which subsequently led to subjective norms. In addition, perceived behavioral control and subjective norms had significant effects on behavioral intention which led to nuclear acceptance. Interestingly, the respondents perceived the benefit of NPP as slightly higher than the perceived risk. With these, it was clear that the commissioning Nuclear Power Plant must consider as an alternative source of electric energy in the Philippines. Moreover, this study is one of the first studies that investigated the acceptance of NPP among Generation Z. Lastly, the model could be a basis to strengthen the acceptance strategy of opening NPP among Generation Z, particularly in developing countries.

Review on Modeling and Control Strategies of DC–DC LLC Converters for Bidirectional Electric Vehicle Charger Applications

Bidirectional DC–DC converters are frequently chosen for applications requiring high power density such as in bidirectional electric vehicle (EV) chargers. Vehicle to Everything (V2X) technology makes the EV battery an electrical energy source. In this article, the use of a DC–DC LLC converter used in a bidirectional EV charger is reviewed. Different modeling approaches of the DC–DC LLC converter, such as small and large signal modeling, are discussed. Common modulation strategies applied to the DC–DC LLC converter in V2X mode, such as Pulse Frequency Modulation (PFM), Pulse Width Modulation (PWM) and Phase-Shift Modulation (PSM), are presented. The new challenge is to present the main characteristics and limitations of each modulation strategy in order to cover the whole operating zone of the EV charger in V2X mode. Furthermore, different control strategies based on a small or large signal model combined with different modulation strategies are highlighted. Linear and nonlinear controllers applied to the DC–DC LLC converter are discussed. Robust controllers are mainly highlighted regarding their advantage in ensuring the control robustness with respect to unexpected disturbances. A comparative study among modulation strategies as well as different control algorithms is conducted in terms of control performance and converter efficiency in V2X mode.

Direct carbon footprint of hydrogen generation via PEM and alkaline electrolysers using various electrical energy sources and considering cell characteristics

Hydrogen supplying to industrial users is currently the major hydrogen business worldwide and the demand for hydrogen is almost entirely supplied from fossil fuels. In the last years a widespread interest on hydrogen has grown as energy vector for the decarbonization of multiple sectors, including industry, transport and buildings. Nevertheless, the impact of natural gas and other fossil fuels substitution with hydrogen is highly affected by the mix of different technologies and energy sources applied for hydrogen generation.The paper aims to investigate current CO2 emissions related with hydrogen generation in Australia and Italy by means of PEM and alkaline technologies; and to evaluate the potential impact considering cell characteristics variation and 3 scenarios based on energy mix. A sensitivity analysis is performed to identify the critical parameters. Based on experimental data, the energy consumption for hydrogen production using PEM technology is more sensitive to cell voltage compared to current density, which indicates the importance of cell manufacturing and electrolyte resistance. In addition, by performing sensitivity analysis regarding energy sources scenarios it is found that carbon dioxide emission in Australia is more sensitive to renewable energy sources rather than Italy.

Prediksi Kecepatan Angin Jangka Menengah dengan Artificial Neural Network untuk Estimasi Daya Listrik Tenaga Angin (Studi Kasus: Kota Sabang)

Indonesia, as a country at the equator, has a very large renewable energy potential that can be used as a source of electrical energy. Electricity consumption in Indonesia, especially in Aceh, continues to increase annually because of population growth and increasing economic needs. Recently, the construction of power plants has been considered to be environmentally friendly and economical. One of the efforts that can be made is the development of wind-power plants. The availability of certain wind speeds was expected. Therefore, accurate prediction data must be used as the basis for building wind power plants. To increase the accuracy of wind speed prediction by looking at the error rate in predicting the amount of wind speed generated using an Artificial Neural Network with feed-forward and feed-backward functions from the back propagation algorithm (BPNN). The results of the application using the Neural Network algorithm with a back propagation Neural Network (BPNN) to predict wind speed show that the Neural Network algorithm can predict wind speed with an error of 0.0036. In July 2021, the estimated energy demand is 81.5 KWH.

Calculating the energy capacity and capacity factor of floating photovoltaic (FPV) power plant in the cirata reservoir using different types of solar panels

The trend to use solar energy as an electrical energy source continues to grow around the world. Located on the equator, Indonesia has the potential for continuously available solar energy throughout the year, which means that the use of solar energy as a solar power plant need to be increased. Floating solar power plant is a solution for solar power plant development in areas where land is limited due to high population density. One of the reservoirs currently under development and construction of floating solar power plant under the Electric Power Supply Business Plan 2021 – 2030 is the Cirata Reservoir with power capacity of 145 MWp. This study aims to obtain the results of the calculation of the energy capacity and capacity factor of the 145 MWp Cirata Reservoir floating solar power plant using different types of solar panel with RETScreen Expert software. This study uses data analysis techniques. The annual energy capacity results for monocrystalline, polycrystaline, and thin-film solar cell module types are 190.54 GWh, 190.54 GWh, and 186.87 GWh respectively. The capacity factor results for monocrystalline, polycrystaline, and thin-film solar cell module types respectively are 15.00%; 15.00%; and 14.70%.

Stochastic multi-objective ORPD for active distribution networks

Optimal Reactive Power Dispatch (ORPD) concerns to dispatch the reactive power outputs of different electrical energy sources to meet both network objectives and constraints. In this regard, distributed generation units and reactive power compensators due to their capability in generating reactive power have significant impact on distribution systems. This is while; their optimal locations in addition to their optimal outputs as well as applying different models of loads can remarkably affect the obtained results. In this article, a new multi-objective ORPD is proposed for active distribution networks considering different load level and the uncertainty of load model and load demand. To effectively solve the introduced ORPD, an optimization approach based on modified grey wolf optimizer and multi-level Pareto analysis is also proposed. Furthermore, the multi-criteria decision-making method is used to find the final suitable answer. To demonstrate the performance of the proposed ORPD and optimization approach, the IEEE 69-bus distribution network is considered as a test system.

Global Radioactive Waste Disposal Trends and Prospects

Nuclear power generation, which began in the Soviet Union in June 1954, has now become a main source of electrical energy in 33 countries around the world. However, radioactive waste and its safety have always been at the center of controversy, and even after 70 years, there is no official regulation on the disposal of radioactive waste under international law. In this review, the policies and current status of radioactive waste disposal in major countries around the world, including Korea, are investigated. Based on this, the direction for radioactive waste management in Korea was presented. Currently, radioactive waste is disposed of in two ways. Finland, Sweden, and France are conducting deep permanent disposal according to the recommendation of the International Atomic Energy Agency, and Japan, the United Kingdom, and India are promoting reprocessing of spent nuclear fuel to reduce waste and the volume of the repository. Korea has been temporarily storing radioactive waste at the site of the power plant since the completion of Kori Unit 1 in 1978, but it is expected that the capacity of the temporary storage facility will reach its limit in 2031. Accordingly, the securing of a permanent disposal site and the development of reprocessing technology are being studied together, but no tangible results have been achieved so far. Korea's radioactive waste disposal has problems such as a small land area, institutional difficulties in developing reprocessing technology, frequent policy changes, ignorance and indifference, and lack of smooth communication. Although public concern about nuclear power generation has increased due to the Fukushima disaster, not many people are interested in spent nuclear fuel. Within the framework of reprocessing and permanent disposal, Korea should refrain from frequent policy changes that can confuse public opinion and research and development, and come up with a long-term realistic policy.

Transformation of Sound Energy into Electrical Energy Using IoT

Abstract: The world is expanding more and more rapidly and we have a lot of energy in bondage. Energy is in distinct forms i.e noise energy, electrical energy, mechanical energy, etc. Energy cannot be generated or demolished but it can be transformed from one energy formation into further. However, we are rapidly expanding and finding a solution to this situation. Now a days noise energy is considered one of the biggest problems in big cities and it cannot be controlled or reduced but they can be used as energy resources. And this noise energy can be used to bring about energy. Factories, industries, vehicles, airports, etc. cause a lot of sound energy. We modify this sound energy into electrical energy. Now a days, Electrical energy source play a foremost role. So, we require additional electrical energy as world population increasing rapidly, especially renewable resources, pure and clean energy sources. Non-renewable energy sources are in short supply. So, we need to utilise the renewable energy resource very carefully. And one of the main mottos of this project is the produced electrical energy is used to reduce the accidents in the deep curve hill station areas by detecting the vehicles. And also, we can use this produced electrical energy in street lights. This project describes work done on conversion techniques and methods used to convert noise energy to corresponding electrical energy

APPLICATION OF MORPHOLOGIC ANALYSIS TO QUANTIFY DIVERSION OF FLOOD WATERFLOW AND POTENTIAL ELECTRICAL ENERGY

As significant catchment of flood water, this study examined important morphological structures of Lake Buhi (LB) catchment area which is a part of Bicol River Basin Area (BRBA). The information taken was used to derive a mathematical model which was then used in analysing the hydrologic event in the area. Different scenarios were investigated to provide solutions and avoid major risks and damages in BRBA during extreme precipitation. The method used to gather the data are Geographical Information System (GIS), digital elevation modelling (DEM), hydrologic modelling, site visit, and remote sensing. It was found that the morphology is well structured to collect and impound vast amount of rainwater flow and form huge body of water known as the LB. The area has immense number of streams that directs surface runoff into the impounded body of water having low drainage density. Enormous amount is needed to discharge away and prevent high water level rise and stop flood in the nearby villages. The capacity of the outflow river is sufficient in most cases of the forecasted precipitation while during the time of typhoon event was found insufficient. However, there are three options to divert away the accumulated floodwater and become a potential source of electrical energy.

Penerapan Bank Energi Surya sebagai Sumber Energi Mandiri untuk Penerangan Masyarakat di Dusun Batu Ampar Desa Mulyorejo

Solar Energy Bank is an activity of the Community Service Student Creativity Program (PKM-PM) in collaboration with Ayo Berbagi (ABG) partners and given to 24 houses of Dusun Batu Ampar RT 04/RW 17 which still do not have access to the PLN electricity network so that lighting conditions at night are very poor. The purpose of this program is to implement the Solar Energy Bank as an alternative source of electrical energy for night lighting with emergency lights and Internet of Things (IoT) based monitoring systems. The program implementation method uses 3 implementation techniques, extension techniques through socialization, then science and technology assistance techniques include preparation and implementation activities, and the third is training and mentoring techniques. Benchmarks for the success of community services activities are measured by questionnaires given to society before and after implementation of the solar energy bank. Based on the result of the questionnaire, the implementation of the Solar Energy Bank has helped solve lighting problems, provided community service satisfaction and increased knowledge regarding the use of solar energy as an alternative energy source and skills in operating the Solar Energy Bank for the people of Dusun Batu Ampar RT 04/RW 17.

Management power of renewable energy in multiple sources system to feeding the rotor of a doubly-fed induction generator

The purpose of this paper is the elimination of interruptions of electrical energy produced by a multi-source production system, so we have assured the feed of DFIG rotor in a wind system by different energy sources (photovoltaic generator, battery group) and switchover between them by auxiliary contacts controlled by a supervisor via a power control algorithm. For the photovoltaic generator, a controller for tracking the maximum power point is designed using direct search approach perturb observe method. For the battery group, the installation of a number of the capacitor battery elements in series and in parallel will be kept the power necessary to supply the DFIG rotor. For the wind system, it contains the power generated by DFIG is controlled by sliding mode system. With regard to switching between electrical energy sources, our proposed system relies on an algorithm to compare the energies produced by each generator with the energy required to feed the DFIG rotor and the energies consumed in the system, where the energy source with high production energy and available is exploited to feed the system and charge the batteries. Simulations were performed to confirm the reliability and efficacy of the system proposed.