The Simulation Research Of High Temperature Fuel Cell Combined Cooling Heating And Power System

Combined cooling heating and power is a total energy system, which is based on the energy cascade utilization. It can greatly increase the energy efficiency and systems secrurity, meanwhile, there are advantages of environment friendship and small investment. Therefore, CCHP system will occupy an important position in the sustainable development strategies. As a new energy system, high-temperature fuel cell has some good characristics, such as clean, high efficiency, good off-design performance etc, it is expected to be the mainstay in the 21st century CCHP system.This paper is supported by National Nature Science Fund, and focused on the modeling and simulation of CCHP system based on the high temperature fuel cell. The major points are as follows:The mathematical models of MCFC system were established based on electrical chemical reaction and thermal dynamic process, and the lumped fuel cell simulation moedel was built on the simulation plantform of Matlab/Simulink. The dynamic performance of MCFC system was investigated.The steady state design of LiBr absorption chiller under rated condition was performed based on LiBr absorption chiller's thermal process. The component models of LiBr absorption chiller were built, which includs high pressure generator, low pressure generator, absorber, evaporator, condenser etc. LiBr absorption chiller's model was created based on above component models. The dynamic performance of LiBr absorption chiller system was investigated.The simulation model of CCHP system was eastablished on the IPSEpro simulation platform. The match characteristics of individual components and the influence of operating condition on system performance were studied. The non-design performance of CCHP system was given.System configuration, operation mode, operation process, match and dynamic characteristics of CCHP system were discussed. Based on the cooling load demand, a CCHPcontrol system is designed to implement related control performance. The preliminary control characteristic of the CCHP system was performed.