Investigation of coupling characteristics of SOFC/MG hybrid system

In a SOFC/MGT hybrid distributed energy system, the performance and safety are greatly influenced by the parameters of MGT. In this paper, a typical numerical model of SOFC/MGT system has been built up. The effects of turbine inlet temperature (TIT) and pressure ratio (PR) to the performance of the hybrid system have been investigated. The results show that the output power and efficiency of the system will come down with the TIT or PR increasing; on the contrary, the possibility that the SOFC and hybrid system may be destroyed will grow with lower value of TIT or PR. Consequently, while a SOFC/MGT hybrid system is designed, it is very important to select appropriate value of TIT and PR.