Experimental Study On Photovoltaic Power Generation And Evaporative Compound Air Conditioning System

Under the contradictory background that the energy problem,environmental problems and the air conditioning energy consumption problems in the building,we can exploit and utilize the renewable energy to solve high temperature problem in some of the residential construction or office building in the northwest China.Photovoltaic power driven evaporative air conditioning that’s to use the two kinds of renewable energy that the solar energy and the dry air energy. Compared with the traditional air conditioning,evaporative air conditioning without compressor is energy saving; if using Photovoltaic(PV) is more energy efficient, and photovoltaic power generation can also drive other loads,fully staffed. Photovoltaic easily affected by the factors such as the intensity of solar radiation and temperature, the capacity is not high affected by high temperature in summer,cooling the photovoltaic panels is very necessary. And comprehensive benefit analysis of the entire system to provide reference and guidance, therefore, the topic is put forward.The solar energy and dry air energy are the most abundant,in 6-8 months of each year,in the northwest region by the resource assessment, which provides the innate natural conditions. To calculate the system matching and select the quite equipment type,organizing the cumbersome and narrative formula. Meanwhile, putting forward the design scheme of several different type and working mode of pv systems are classified in this paper.Firstly, the topic did most the early survey work; and secondly the wind-light complementary evaporative air fan driven experiments, which draw a feasible and battery voltage stabilizing role. Then establishment of independent PV test bench to drive evaporative air conditioning to do a series of experiments,by a office in xi ’an as a case.The test results that the PV system produce about 1.8 k W.h on a testing day, the total power170 k W.h in summer, and can meet the 230 W dew point indirect evaporative air conditioning requirements; the air-conditioning outlet temperature is 21-28.1 ℃, meet the requirements of indoor; secondary exhaust temperature is 29.1-30.7 ℃, which can be recycled; Photovoltaic system DC-AC conversion loss about 20-25%, therefore Photovoltaic drivered DC type load is more efficient.At 12:00-14:50,by evaporative air fan cooling Photovoltaic panels, system capacity can be increased about 0.1 k W.h, and thePV system output power is stable.Finally, carring on the initial investment,energy saving and emission reduction benefit analysis, the grid PV type than independent type system has priority application advantages;3-5 k W system, about 5-7 years can recycling costs, the energy conservation and emissions reduction benefit is very considerable in the life cycle.