Analysis of Influencing Factors and Mechanisms of SOFC System Performance

Abstract

Due to the low efficiency of traditional utilization methods, the environmental pollution caused by diesel has become alarming in recent years, and the clean utilization of diesel has become urgent. “Diesel reforming+SOFC(Solid Oxide Fuel Cell)” technology can directly convert diesel chemical energy into electrical energy, with higher comprehensive fuel utilization and less environmental pollution. It is considered to be an important trend for efficient and clean utilization of diesel. In this paper, the ASPEN PLUS simulation platform is used to establish the whole process model of SOFC system based on diesel reforming, and the effects of SOFC operating parameters such as operating temperature, operating pressure, air excess coefficient and water to carbon ratio on the performance of system are studied in detail. The results show that higher SOFC operating temperature and pressure are helpful to improve the performance of system; With the increase of air excess coefficient from 2.3 to 14.2, the output power of the system is increasing, and the power generation efficiency of the system is decreasing; With the increase of feed water to carbon ratio from 1 to 10, the power generation efficiency and output power of the system increase first and then decrease. When the feed water carbon ratio is 4.31, the above two parameters reach the highest values of 34.9% and 10611.7W.