Theoretical Simulation And Experimental Research On System Of Energy Independence Heat Pump Driven By Internal-combustion Engine

The system of energy independence heat pump driven by internal-combustion engine (EIHPICE) is the energy-saving and environment-friendly equipment, which used natural gas or other fuels as an independent input energy, and could provide the heating, cooling and hot water for the buildings. It is inheritance and development of internal-combustion engine heat pump technology. In this paper, the theoretical simulation and experimental research were conducted on the system of EIHPICE, the main research contents are as follows:⑴A imed at the system of EIHPICE, the whole system is divided into three parts: Internal-combustion engine system, heat pump system and autonomous power supply system. The mathematical model of EIHPICE was established. It is made up of sub-models of internal-combustion engine, exhaust gas heat exchanger, cylinder heat exchanger, generator, compressor, finned tube heat exchanger, plate heat exchanger, expansion valve and dispenser. Aimed at the actual heat pump system, a detailed study on a finned tube heat exchanger with flow regulation of dispenser was carried out, the parameters of refrigerant along with the distribution in the heat exchanger were simulated and analyzed.⑵The theoretical study was conducted on autonomous power supply system. The mathematical model of a three-phase synchronous generator is established under the abc and dq coordinate system, the dynamic performance of synchronous generator on sudden three-phase short circuit and establish potential in the case of no load had been studied. Aiming at the characteristics of this power generation system, in this paper, a rectifier model is established by using the SIMULINK toolbox in the MATLAB.⑶Experiment table for performance research of the EIHPICE was established, the performance tests under different working conditions with variable rotary speed, variable water flow of plate heat exchanger and variable evaporation temperature were carried out. Data measured on the testing is used to testify the EIHPICE model, and the results indicated that the calculated results are conformed to the experimental data better.⑷The influence factors of the EIHPICE performance were carried on by using the mathematical model of the EIHPICE. The effects of refrigerant circuitries, current form of plate heat exchanger and generator load on the performance of the EIHPICE were investigated numerically. ⑸Based on the mathematical model of heat pump driven by Internal-combustion Engine(ICEHP), the dynamic distributed parameter model of the ICEHP was presented, and the dynamic characteristics of the air source ICEHP had been studied, the statistic data of temperature spans of Beijing, Shanghai, Guangzhou and Nanjing are established according to the weather data of nearly thirty years, the COP and PER variation with the outdoor temperature are calculated when the HPICE is running with the load of building in the cooling and heating season, and the seasonal efficiency ratios and PER of Beijing, Shanghai, Guangzhou and Nanjing were analyzed, as well as the different type of air source heat pump's seasonal performance and PER were compared.