Abstract

Integrating thermal energy storage (TES) device with building cooling heating and power (BCHP) system proves to be an effective way to improve the performance of the whole system. In this paper, the applicability of TES-BCHP system is investigated according to the relationship between user load demands and system energy supply. Based on the supplied thermal power ratio of the prime mover and the required one of users, a new parameter, the degree of mismatch (DM), is defined. Moreover, the relationship between primary energy saving ratio (PESR) of TES-BCHP system and DM is established, under following thermal load (FTL) and following electrical load (FEL) respectively for three different working conditions. The preliminary results show that the more DM approaches to unity, the higher PESR of TES-BCHP will be. It also indicates that TES-BCHP is more applicable for those where the heating demand is dominant.

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