水素吸蔵合金を用いた蓄熱システムの開発 : 第3報,実負荷条件による性能試験(熱工学,内燃機関,動力など)

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An innovative heat storage system with metal hydride (MH) applied to air conditioning of buildings is investigated. The characteristics that metal hydride generates heat at absorption process and absorbs heat at desorption process is useful for new air conditioning system without chlorofluorocarbon (CFC). The trial system is composed of two heat storage vessels of a "shell and tube type" heat exchanger with heat transfer fins and filled with MH and a compressor equipped for hydrogen transfer. The system proposed in this paper is simple because the heat storage vessel has two functions of heat source and heat storage, and suitable for environment because of no usage of CFC. The purpose of heat storage is to decrease the difference of the electric power demand at daytime and that at night. That is to say, the effective heat storage system consumes electric power at night and requires no power at daytime. In the innovative heat storage system with metal hydride, the hydrogen is transferred using electric power at night and transferred in reverse only by the pressure difference between two heat storage vessels at daytime. The trial system was operated at actual loading condition, and the performance of the MH heat storage system was evaluated. As the experimental result, heat storage finishes in a limited time, and heat storage quantity was 13.5 MJ, which was sufficient for the heat capacity to cool the 10m^2 room for 3 hours. And, the storaged heat per unit MH volume is 305 MJ/m^3, which is sufficiently high compared with the conventional system using water or equivalent ice. In addition, the coefficient of performance of the system is 2.44.
社団法人日本機械学会の論文
2004-08-25

水素吸蔵合金を用いた蓄熱システムの開発 : 第3報,実負荷条件による性能試験(熱工学,内燃機関,動力など)

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