Abstract:
A combined heating, power and biogas system coupled with renewable energy (RCHPB) has become an important technical approach to deal with the global energy crisis. The RCHPB system illustrates a characteristics of heterogeneity of several input energy resources and strong coupling among resources, grids, loads and storages, which have brought great challenges to the comprehensive evaluation of the system. A reasonable evaluation of the comprehensive performance of the system is the primary prerequisite for promoting the development of multi-energy complementary systems. On the basis of the research results at home and abroad, the systematic energy efficiency definition, the evaluation index system and the evaluation methods of RCHPB system are summarized and analyzed in the paper. The results of the review show that the traditional evaluation methods are not suitable to evaluate RCHPB system well due to the uncertain and fluctuant wind energy and solar energy as well as the strong coupling of energy conversions. It is necessary to consider the effects of climate, resource endowment, energy storage capacity and energy conversion coupling on the evaluation indexes and construct an evaluation index system and comprehensive evaluation method for the RCHPB so as to provide strong support for the application and development of the RCHPB system. The evaluation indexes and evaluation methods of the RCPHB system are finally summarized and prospected.