Research On Performance And Component Matching Characteristics Of Distributed Independent PV Air Conditioning System

In recent years many countries around the world were using photovoltaic generation to alleviate the pressure of the power grid. and to feed the electricity demands in areas without grid. Also, with the development of the society and the improvement of people’s quality of life, air conditioning energy consumption in the building has climbed to 50~ 60%. Photovoltaic(PV) air conditioning systems use power all come from the sun and cause no pollution to the environment, thus get the public’s attention and research enthusiasm.To solve the problems of components matching or mixture ratio for different areas using photovoltaic air conditioning system. The study of distributed independent photovoltaic air conditioning system based on Kunming climate data was carried out from the following aspects:1.The research status of distributed photovoltaic air conditioning system was presented, and the advantages of the distributed photovoltaic air conditioning system was analyzed. The working principle of the system and component parameters are introduced, and a complete set of 48 V distributed photovoltaic air conditioning system was designed, which mainly consists of the solar panel, controller, inverter, battery and a air conditionor. The performance evaluation index of this system is also presented and analyzed.2. The refrigeration and heating performance of the system based on climate conditions in Kunming were experimentally studied, results show that the highest efficiency of system can reach 0.37, and the daily maximum generating capacity is 9 k W. During the peak irradiation period the solar panels refrigerating capacity is 430W/m2 h, heating capacity is 400 W, and the highest security of the system can reach 1.4.3. The system theoretical model was established and solved to analysis the system energy distribution by the use of Matlab software. The model was validated by experimental test results, which shows a error within 7%.4. The validated model was used to improve the matching performance of system components, the results show that if the improvement for this system controller with the function of MPPT and the maximum electric current is 40 A, and Pure sine wave adopts full bridge 1.5k W inverter, ultimately control efficiency and inverter efficiency could be increased by 13~20%, eventually a 11~13% performance enhancement could be achieved, therefore the system efficiency can be improved from 0.37 to 0.41.5. Finally, the validated model was used to evaluate the performance of distributed photovoltaic air conditioning system(commercial and household two categories) in three typical areas: Tropical — Perennial with cooling demand(southeast Asia), temperate areas—spring all the year round(Kunming), temperate areas—four distinct seasons(Beijing). The conclusions are as follows: the household type distributed photovoltaic air conditioning system has well running performance in the power shortage areas such as southeast Asia tropics, the payback period is six years; commercial type distributed photovoltaic air conditioning system has the prominent environmental and social benefits for high electricity price or power shortage areas, such as southeast Asia tropics or Beijing.