Performance Researches Of A Hybrid System Based On 120kW Solid Oxide Fuel Cell And Micro Gas Turbine

Fuel cell is a device that converts chemical energy into electricity directly from the reaction of fuel and oxidant. It can achieve electrical efficiency during 40%-60%. The overall combined heat and power efficiency is above 80%. So it has a better development prospect. At present, the developed countries and areas such as America, Europe, Japan and so on, they have focused on the fuel cell research and commercial. Solid oxide fuel cell (SOFC) is one kind of fuel cells. The exhaust gas temperature of SOFC is about 900℃, therefore it has the advantage of high temperature waste heat to recovery. Micro gas turbine (MGT) works at high temperature and pressure conditions. If the hybrid system which is combined SOFC and MGT is achieved, the hybrid system not only can improve the overall heat but also improve electrical efficiency. It also can reduce the emission and pollutants, and then be full use of energy. Therefore, combined SOFC and MGT will have great application prospect in distributed energy market. It is helpful to solve the energy question in researching combined system.The content of this paper is based on the funds of DLUT-DICP's project which is combined intermediate temperature pressurized SOFC and MGT. In this paper, the H₂-O₂ SOFC model is built by c programming language. Then the parameters such as voltage, output power, current density, fuel utilization, operation temperature and so on are presented. The effects of them on SOFC are also presented. Combined SOFC and MGT System is built by the software Aspen Plus. In this hybrid system, the fuel is natural gas. The different hybrid systems have been built and analyzed. Then the performance and advantages of them are given.Highly effective energy utilization and new energy production become the focus of energy development with increasing in economy and lacking for energy sources in the world. The practical examples with SOFC-MGT are investigated in the fields of the different hybrid power systems and simulate with numerical ways. The results show a promising direction for SOFC+MGT application in the future.