Building combined cooling, heating and power (CCHP) system with re-versible electrical heat pump (EHP) and thermal-activated heat pump (THP)

Building combined cooling, heating and power (CCHP) system is characterized by its high energy efficiency. CCHP system can have different configurations, in this paper we study an innovative system with reversible electric heat pump (EHP) to provide cooling or heat and thermal-activated heat pump (THP) which is absorption chiller to provide cooling. In addition, waste heat can also be used for heating through heat exchangers. Then, we build a system model and analyze the system coefficients and operating strategies in different weather condi-tions. On this basis, we conduct a preliminary economic analysis. Results show that the total energy efficiency during winter operation can be from 90%-135%, and in summer operation mode from 61-129%, depending on different cooling, heating and power load profiles. In ad-dition, NPV analysis shows that the payback time of the system can be within 3 years, com-pared with the traditional gas fired boiler plus EHP scenario.