Operation method study based on the energy balance of an independent microgrid using solar-powered water electrolyzer and an electric heat pump |
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Authors: | Shin&rsquo ya Obara,Seizi Watanabe,Balaji Rengarajan |
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Affiliation: | a Power Engineering Laboratory, Department of Electrical and Electronic Engineering, Kitami Institute of Technology, 165 Koen-cho, Kitami, Hokkaido 090-8507, Japan b Department of Mechanical Engineering, Kushiro National College of Technology, Otanozhike 2-32-1, Kushiro, Kokkaido 084-0916, Japan c Centre for Fuel Cell Technology, International Advanced Research Centre for Powder Metallurgy and New Materials, IIT-M Research Park, Phase-1, Second Floor, 6, Kanagam Road, Taramani, Chennai 600 113, India |
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Abstract: | A completely energy-independent microgrid (green microgrid) was examined in this work with the aims of abating greenhouse gas emissions by spreading the use of green energy, providing energy backup systems for disaster, and increasing the energy utilization efficiency with the use of exhaust heat. This paper analyzed the energy supply to six houses in a cold region. The green microgrid consisted of photovoltaics, water electrolyzers, proton-exchange membrane fuel cells (PEFCs), and heat pumps. To investigate the operation method and the capacity of each piece of equipment in the arrangement, a distributed system with two or more sets of equipment and a central system with one set of equipment were analyzed by a genetic algorithm. By introducing the prior energy need pattern of a cold region into the proposed system, the operation method and equipment capacity based on the power and heat balance were clarified. By introducing the partial load performance of a water electrolyzer and a PEFC into the analysis program, the operation method of each system was investigated. It was found that the area of a solar cell of a distributed system could be reduced by 12% as compared to a central system. |
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Keywords: | Microgrid Distributed power system Photovoltaic Water electrolyzer Genetic algorithm |
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