CO2-emissions reduction potential and costs of a decentralized energy system for providing electricity,cooling and heating in an office-building in Tokyo |
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| Affiliation: | 1. Center for Molecular Systems (CMS), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan;2. Department of Applied Chemistry, Faculty of Engineering, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan;3. Next-Generation Fuel Cell Research Center (Next-FC), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan;4. Inorganic Material Research Division, INAMORI Frontier Research Center, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan;5. Research and Education Center for Advanced Energy Materials, Devices, and Systems, Kyushu University, 6-1 Kasuga-kouen, Kasuga 816-8580, Japan;6. International Institute for Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan |
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| Abstract: | Decentralized energy systems are thought to have great potential for supplying electricity, cooling, and heating to buildings. A decentralized system combining a solid oxide fuel cell (SOFC) with an absorption chiller-heater (ACH) is proposed. The CO2-emissions and costs of using different configurations of this SOFC-based system to provide an office building in Tokyo with electricity, cooling and heating are calculated by using an SOFC-model and an absorption-chiller model together with data for cooling and heating loads measured at an office building in downtown Tokyo. The results are compared with the CO2-emissions and costs of a conventional system that obtains the base electricity requirements as well as electricity for an electric chiller–heater system from the central power grid. The fully decentralized SOFC-based energy system could result in a potential CO2 reduction of over 30% at an estimated cost increase of about 70% compared to the conventional system. |
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