Abstract
a b s t r a c t Fuel cell based micro-CHP systems are expected to be one of the most promising technologies for imple- mentation in the residential sector. Since the design and operation of such CHP systems are greatly dependent upon the seasonal atmospheric conditions, it is important to evaluate their performance under difference climate conditions to ensure that it is well matched with the local heat-to-power ratio. The aim of this study is to investigate the optimal design and operation of a syngas-fuelled SOFC micro-CHP system for small households located in five different climate zones in China. The ability of the micro-CHP to cover the heat and electricity demand of a 70 m2 single-family apartment with an average number of occupants of 3 is evaluated. A detailed model of the micro-CHP unit coupled with a hot water storage tank and an auxiliary boiler is developed. System design trade-offs are discussed to determine the optimal match between the energy demand of the household for different climates across China and the energy supply of the micro-CHP during the whole year. Moreover, criteria for sizing the system components of the micro-CHP are specifically addressed. The developed methodology can be applied to different types
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