Study On Optimization Control Of Ground-Source Heat Pump System(GSHPs)

This subject is study on GSHPs(ground-source heat pump system), In order to promoting GSHPs advantages of energy-saving and environmental, this dissertation presents a new fuzzy control method,designs the control programme and sets up an equipmen,which was operated in the laboratory.The results indicated that the new control method is better than the traditional one,in saving running costs and extending the service life of heat pump.Firstly, our R&D group have researched the dual-machine technology which has been used in the actual parallel model project.The equipment of GSHPs makes up of two fixed speed compressor and is contolled by the traditional on-off method. In the running process of the system,a large number of practical operation of data is recorded and analysed,it contributes foundation to realization of GSHPs intelligent control.Secondly, in order to mostly satisfying the user's requirement and saving more energy, problems of this control method were found out by analysing data records of traditional on-off control method.For its shortages, a fuzzy logic control which bases on the physical characteristics of actual GSHPs is presented.The framework of strategy consists of the fuzzy logic control rules,and a FLC(fuzzy logic controller) is formed.According to the performance of fuzzy logic control,An inverter controlled scroll compressor is selected.It can achieve continuous changes in energy output.Finally,an equipment of GSHPs is constructed,and it runs successfully. As proved by running data,FLC can follow the change of energy necessity effectively and response quickly to outside interference. Based on FLC and inverter controlled scroll compressor, the optimization control system of GSHPs has a better adaptive capability,achieves continuous energy output,responses to a wide range change of load and interference rapidly,improves the start performance of compressor.A complete set of new GSHPs' technologies, integrating the fuzzy logic control system with current GSHPs' technology,is set up,which has value of practice and promotes wide use of GSHPs.