Based On The Different Storage Modes Of Solar Photovoltaic Air Conditioning Performance Research

With the improvement of people's living standard,produced by the use of air conditioning energy consumption accounts for the proportion of building energy consumption is more and more big,especially in the summer,large refrigeration requirements often result in summer power shortages.Research and development of solar energy air conditioning to meet the demand of cooling and reduce the energy consumption is of great significance.To solve the problem of solar energy is intermittent and instantaneous.The solar air conditioning system with different energy storage has be studied in the operation characteristics and cooling performance.The concrete research contents are as follows:First,Build a set of independent photovoltaic air conditioning system which for battery energy storage device.The energy transfer between components of system and cooling performance are analyzed.The results show that System working in mode of panels and battery power supply,rated input power is 2.45 kW,battery capacity is 130 ah,the COP_solar maximum value of 0.36.Second,considering the battery have some problem such as short service life and the high cost,air conditioning system was improved.a photovoltaic direct-drive ice cool storage air conditioning system has been established.Refrigeration compressor can be driven directly by photovoltaic panels,using ice bucket in evaporator ice cold storage,replace battery stored energy.Third,under different working conditions,the stability of system is studied experimentally.At the same time,the cold storage and cooling characteristics of the system are studied experimentally under different operating modes.Experiment results show that the system composed of 18 m² panels can stable operation,when the radiation intensity is larger than 148 W/m².System working in working condition of,rated input power is 2.5 kW,ice-making capacity is 79 kg,the COP_solar is 0.24.Fourth,Photovoltaic direct-drive ice cool storage system in the evaporator in the process of ice,found through theoretical analysis and experimental testing show thatrefrigerant and water in thermal efficiency will be reduced,when the ice thickness is 3 cm.The refrigeration coefficient of performance decreased with the increase of the ice thickness.Fifth,system can realize air conditioning function by the form of circulating water melting ice.System working in mode of ice making and then ice melting cooling simultaneously,and the COP_solar is 0.37,and better than the traditional photovoltaic air conditioning system with battery as energy storage device.