Dynamic Performance Reserch Of Combined Cooling Heating And Power System Based On Gas Engine

With the energy efficiency strongly advocated at home and abroad,as a way of cascade energy utilization,the Combined Cooling Heating and Power(CCHP) system has gradually become the main trend in the future study and use. Though a lot of research work has been carried out for CCHP system at home and abroad,but there is still more study based on the steady state characteristics than the study of the theory of the dynamic behavior of the whole system.Though the simulation study of dynamic characteristics of a CCHP system based on gas engine,we can grasp the dynamics of such a system and put forward control methods adjusting the operation of the actual system.With a CCHP system form Shanghai using an internal combustion engine as the prime mover as the foundation,finish the required data of dynamic simulation,and use the known part of the data to design the complete system and absorption refrigerating machine. List the properties empirical formulas of various substance in system and program into a callable function with MATLAB.On this basis,use the method of mean value model to carry on the dynamic mathematical modeling of each subsystem of generating,and adopt the lumped parameter method to establish machine dynamic mathematical model for all kinds of heat exchangers and absorption refrigerating in system.By analyzing the mathematical model,the paper puts forward the corresponding application solutions,and program system components and the overall system using MATLAB/SIMULINK.According to system control elements and process,simulate the dynamic condition of generator set and absorption chiller,including load load, load lightening, shutdown and boot, etc.On the basis of the analysis of simulation results,we get some practical guiding significance to the conclusions.At last,list the various operation schemes of the system,and on the basis of the simulation and analysis,we can get the system dynamic rules and guide the adjustment of the actual operation control.