中文摘要：

以安阳市某中学20 kW准单晶并网光伏系统为例,利用效益分析模型,定量计算光伏发电的社会经济和环境效益。结果显示：在标准日辐射时数4.14 h、光伏组件5.5元/W、用户侧电价0.6元/（kW.h）和无税费情况下,光伏系统投资回收期为14年,能量回收期2.9年,可以安排1人就业;与煤电相比,每年污染减排496.39当量,PV发电环境成本为0.18分/（kW.h）,年投资报酬率为2%。PV的即时功率与太阳辐射量呈正比,与环境温度呈正比。系统功率与温度的相关系数r为0.46,属弱相关;系统功率与空气相对湿度的相关系数r为-0.38,属弱反相关。

英文摘要：

Taking the 20-kW grid-connected photovoltaic system（PV） with quasi-monocrystalline silicon modules for example,the social economic and environmental benefits of photovoltaic applications are calculated based on a benefit analysis model.The results show that the investment and energy recovery periods are 14 years and 2.9 years with one employment position provided on condition that the daily standard radiation hours are 4.14 h,the PV module costs 5.5 Yuan/W,the electricity price is 0.6 Yuan /kWh at the user side and there is no taxation.Compared with coal-fired generation,the emission reduction volume of the PV generation is 496.39 equivalent per year;the environmental cost of the PV power is 0.18 Fen/ kW.h;and the annual return on investment is 2%.The PV instantaneous power is proportional to the solar radiation volume and the environmental temperature.The weak correlation between the system power and the temperature is observed with the correlation coefficient equal to 0.46,while the correlation between the power and humidity turns out to be weak negative with the coefficient correlation of-0.38.