scholarly journals Evaluation of a Sabatier Reaction Utilizing Hydrogen Produced by Concentrator Photovoltaic Modules under Outdoor Conditions

2020 ◽  
Vol 10 (9) ◽  
pp. 3144
Author(s):  
SoeHtet Wai ◽  
Yasuyuki Ota ◽  
Masakazu Sugiyama ◽  
Kensuke Nishioka
Keyword(s):  
Energy Systems ◽  
Cost Effective ◽  
Electrical Energy ◽  
H2 Production ◽  
Electrochemical Cells ◽  
Photovoltaic Modules ◽  
Process Chains ◽  
Power To Gas ◽  
The University ◽  
Gas Conversion

Power to gas (P2G) process chains have tremendous potential to enhance energy systems because of the capability of solar energy to convert solar radiation into electrical energy as well as the increasing use of specific gases as a means to store the resulting energy. Utilizing sunlight, photovoltaic systems are capable of producing useful gases such as hydrogen (H2) and methane (CH4). These gases are utilized in gas grids, transportation, and heavy industry. In employing a sunlight-derived gas, H2 production, by water disbanding, needs to be cost-effective with tremendous adaptability. New powerful solar to gas conversion system modules have been successfully carried out in the University of Miyazaki, Japan. These systems contain DC/DC converters and electrolyzer sets linked in parallel with efficient three concentrator photovoltaics (CPV). The performance of the solar to methane conversion process and power consumption analysis will be the focus of the current research. Efficiencies of 97.6% of CO2 to CH4 conversion and 13.8% for solar to methane on a clear sunny day were obtained by utilizing highly efficient CPV modules connected with multiple converters, electrochemical cells, and reactors fixed with Ni-based catalysts.

scholarly journals Thermal Energy Storage for the Complex Energy Systems

2020 ◽  
Vol 2 (2) ◽  
pp. 175-190
Keyword(s):  
Energy Storage ◽  
Thermal Energy ◽  
Sustainable Use ◽  
Energy Systems ◽  
Cost Effective ◽  
Electrical Energy ◽  
Energy System ◽  
Emerging Trends ◽  
Network Operation ◽  
Storage Technologies

Thermal energy systems (TES) systems contribute to the on-going process leading to greater integration between different energy systems in order to achieve cleaner and more sustainable use of energy resources. This paper reviews the current literature showing the development and deployment of TES-based solutions in power grid-connected systems. These solutions integrate the energy system to gain new potential for energy management, make better use of renewable energy (RES) resources, modernize energy system infrastructure, facilitate network operation practices that include energy conversion and service delivery. The network is cost-effective, facilitating. This paper provides a complementary look at other investigations into energy storage technologies and materials for TES and TES building applications and electrical energy storage aids for network applications. The main aspects discussed are the features, parameters, and models of TES systems, the deployment of TES in variable RES systems, small networks, multi-power networks, and emerging trends for TES applications.

Installation, Operation, and Performance of the Amonix High Concentration Photovoltaic System at the University of Nevada, Las Vegas

Solar Energy ◽  
2005 ◽  
Author(s):  
Kenneth W. Stone ◽  
Vahan Garboushian ◽  
Robert Boehm ◽  
Rick Hurt ◽  
Allison Gray ◽  
...  
Keyword(s):  
Las Vegas ◽  
Electrical Energy ◽  
Photovoltaic System ◽  
Site Location ◽  
High Concentration ◽  
Component Level ◽  
Photovoltaic Modules ◽  
And Performance ◽  
Power And Energy ◽  
The University

This paper discusses the installation and operation of the Amonix High Concentration Photovoltaic System at the Center for Energy Research at the University of Nevada, Las Vegas (UNLV). This includes the analysis performed to select of the foundation site location, drilling the foundation, installation of the foundation and pedestal, installation of the drive system, and installation of the concentrating photovoltaic modules. The day-to-day operation of the unit is described including an example of the generated power throughout the day. A summary is presented of the performance of the unit since the start of operation in March of 2004. This includes an example of the daily-generated electrical energy for a month, the monthly-generated energy since the start of the program, the total generated energy, the generating time, the peak power, etc. The result of an analysis of the power and energy generated is given that indicates the system performance has not decreased during this period of operation. Operating reliability data of the unit is presented for the system, subsystems, and major component level.

Electrochemical cleaning of soils with different concentrations of oil pollution using a single source of electrical voltage

2020 ◽  
Vol 10 (6) ◽  
pp. 674-680
Author(s):  
Nikolay S. Shulaev ◽  
◽  
Valeriya V. Pryanichnikova ◽  
Ramil R. Kadyrov ◽  
Inna V. Ovsyannikova ◽  
...  
Keyword(s):  
Contaminated Soils ◽  
Oil Pollution ◽  
Cost Effective ◽  
Electrical Energy ◽  
Design Parameters ◽  
Technological Infrastructure ◽  
Chemical Reagents ◽  
Electrode Space ◽  
Soil Excavation ◽  
Interelectrode Resistance

The most essential scientifific and practical task in the area of ecological safety of pipelines operation is the development and improvement of methods of purifification and restoration of oil-contaminated soils. One of the most effificient and cost effective methods is electrochemical purifification, that does not require the use of expensive chemical reagents and soil excavation. However, the consideration of non-uniform contamination of various soil sections is required. The article examines the features of the organization and technological infrastructure for electrochemical purifification of non-uniformly contaminated soils when using a single electrical energy source, a method for calculating the design parameters of the corresponding installation is proposed. Effificient purifification of non-uniformly contaminated soil when using a specifified voltage is possible through the use of different-sized electrodes. For each soil type, the amount of transmitted electric charge required for soil purifification is determined by the concentration of the contaminant. Allocation of cathodes and anodes as parallel batteries and their connection using individual buses is an effective and energy-effificient solution, since an almost-uniform electric fifield is created in an inter-electrode space, thus allowing the reduction of the interelectrode resistance of the medium.

scholarly journals Eco-Emission Analysis of Multi-Carrier Microgrid Integrated with Compressed Air and Power-to-Gas Energy Storage Technologies

2021 ◽  
Vol 13 (9) ◽  
pp. 4681
Author(s):  
Khashayar Hamedi ◽  
Shahrbanoo Sadeghi ◽  
Saeed Esfandi ◽  
Mahdi Azimian ◽  
Hessam Golmohamadi
Keyword(s):  
Energy Storage ◽  
Power Systems ◽  
High Efficiency ◽  
Objective Assessment ◽  
Energy Systems ◽  
Vital Role ◽  
Compressed Air ◽  
Emission Analysis ◽  
Multi Objective ◽  
Power To Gas

Growing concerns about global greenhouse gas emissions have led power systems to utilize clean and highly efficient resources. In the meantime, renewable energy plays a vital role in energy prospects worldwide. However, the random nature of these resources has increased the demand for energy storage systems. On the other hand, due to the higher efficiency of multi-energy systems compared to single-energy systems, the development of such systems, which are based on different types of energy carriers, will be more attractive for the utilities. Thus, this paper represents a multi-objective assessment for the operation of a multi-carrier microgrid (MCMG) in the presence of high-efficiency technologies comprising compressed air energy storage (CAES) and power-to-gas (P2G) systems. The objective of the model is to minimize the operation cost and environmental pollution. CAES has a simple-cycle mode operation besides the charging and discharging modes to provide more flexibility in the system. Furthermore, the demand response program is employed in the model to mitigate the peaks. The proposed system participates in both electricity and gas markets to supply the energy requirements. The weighted sum approach and fuzzy-based decision-making are employed to compromise the optimum solutions for conflicting objective functions. The multi-objective model is examined on a sample system, and the results for different cases are discussed. The results show that coupling CAES and P2G systems mitigate the wind power curtailment and minimize the cost and pollution up to 14.2% and 9.6%, respectively.

scholarly journals Optimal Planning of Electricity-Natural Gas Coupling System Considering Power to Gas Facilities

Energies ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3400
Author(s):  
Jie Xing ◽  
Peng Wu
Keyword(s):  
Natural Gas ◽  
Energy Systems ◽  
Optimal Planning ◽  
Planning Model ◽  
Operation Costs ◽  
Coupling System ◽  
Gas System ◽  
Different Types ◽  
Power To Gas ◽  
Natural Gas System

Bidirectional coupling systems for electricity and natural gas composed of gas units and power-to-gas (P2G) facilities improve the interactions between different energy systems. In this paper, a combined optimization planning method for an electricity-natural gas coupling system with P2G was studied. Firstly, the characteristics of the component model of the electricity-natural gas coupling system were analyzed. The optimization planning model for the electricity-natural gas coupling system was established with the goal of minimizing the sum of the annual investment costs and the annual operation costs. Based on the established model, the construction statuses for different types of units, power lines, and pipelines and the output distribution values for gas units and P2G stations were optimized. Then, the immune algorithm was proposed to solve the optimization planning model. Finally, an electricity-natural gas coupling system composed of a seven-node natural gas system and a nine-node power system was taken as an example to verify the rationality and effectiveness of the model under different scenarios.

scholarly journals Numerical Evaluation of a HVAC System Based on a High-Performance Heat Transfer Fluid

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3298
Author(s):  
Gianpiero Colangelo ◽  
Brenda Raho ◽  
Marco Milanese ◽  
Arturo de Risi
Keyword(s):  
Heat Transfer ◽  
High Performance ◽  
Cooling System ◽  
Electrical Energy ◽  
Simulation Software ◽  
Heat Transfer Fluid ◽  
Hvac System ◽  
Dynamic Simulations ◽  
Heating And Cooling ◽  
The University

Nanofluids have great potential to improve the heat transfer properties of liquids, as demonstrated by recent studies. This paper presents a novel idea of utilizing nanofluid. It analyzes the performance of a HVAC (Heating Ventilation Air Conditioning) system using a high-performance heat transfer fluid (water-glycol nanofluid with nanoparticles of Al2O3), in the university campus of Lecce, Italy. The work describes the dynamic model of the building and its heating and cooling system, realized through the simulation software TRNSYS 17. The use of heat transfer fluid inseminated by nanoparticles in a real HVAC system is an innovative application that is difficult to find in the scientific literature so far. This work focuses on comparing the efficiency of the system working with a traditional water-glycol mixture with the same system that uses Al2O3-nanofluid. The results obtained by means of the dynamic simulations have confirmed what theoretically assumed, indicating the working conditions of the HVAC system that lead to lower operating costs and higher COP and EER, guaranteeing the optimal conditions of thermo-hygrometric comfort inside the building. Finally, the results showed that the use of a nanofluid based on water-glycol mixture and alumina increases the efficiency about 10% and at the same time reduces the electrical energy consumption of the HVAC system.

Fe, Ni-codoped W18O49 grown on nickel foam as bifunctional electrocatalyst for boosted water splitting

2021 ◽  
Author(s):  
Guojuan Hai ◽  
Jianfeng Huang ◽  
Liyun Cao ◽  
Koji Kajiyoshi ◽  
Long Wang ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Water Splitting ◽  
High Performance ◽  
Solvothermal Method ◽  
Nickel Foam ◽  
Energy Systems ◽  
Cost Effective ◽  
Bifunctional Catalysts ◽  
Renewable Energy Systems ◽  
Bifunctional Electrocatalyst

Designing cost-effective bifunctional catalysts with high-performance and durability is of great significance for the renewable energy systems. Herein, a typical Fe, Ni-codoped W18O49/NF was prepared via a simple solvothermal method....

scholarly journals Correction: In situ electrochemical H2 production for efficient and stable power-to-gas electromethanogenesis

2021 ◽  
Author(s):  
Frauke Kracke ◽  
Jörg S. Deutzmann ◽  
Wenyu Gu ◽  
Alfred M. Spormann
Keyword(s):  
H2 Production ◽  
Power To Gas

Correction for ‘In situ electrochemical H2 production for efficient and stable power-to-gas electromethanogenesis’ by Frauke Kracke et al., Green Chem., 2020, 22, 6194–6203, DOI: 10.1039/D0GC01894E.

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