Abstract
This paper details the use of objective sizing techniques for a novel design of a residential solid oxide fuel cell (SOFC) combined cooling, heat and electrical power (CCHP) for UK market. The aim of the research is to determine the objective sizing of parameters taking into account the aspects of efficiency, economic and environmental impacts by the entropy-weighting approach and grey relationship analysis. The combination of these two approaches helps designers objectively maximise efficiency of energy utilization and minimise emissions and costs of the system that is examined. It is envisaged that electrical demand is met by the fuel cell stacks while the most efficient use is made of heat that is generated by the fuel cell through waste heat recovery to satisfy domestic hot water, freezers, space heating and space cooling. The demand of conventional electric freezers is innovatively designed to be fulfilled by heat exchangers and absorption chillers to further increase the efficiency of heat use. Due to the particularity of the energy demand of the domestic sector in the UK, the proposed system structure, sizing values and control strategies - supported by MATLAB R2018a/Simulink - are suited to the residential energy demands of a single household.
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