太阳能光伏发电技术在海南地区低温储粮中的应用研究

Application on solar photovoltaic power generation technology in low temperature storage of Hainan area

对海南地区某占地面积为270 m2的粮仓屋顶铺设太阳能光伏发电系统进行了研究,通过对光伏发电类型、太阳能组件、离网逆变器等的选择,设计并铺设了一个总直流输出功率为29 160 W的离网太阳能光伏发电系统。正常情况下,该系统日平均产生直流电量116 kW·h,平均系统转换效率为0.65,能提供220 V、50 Hz的交流电量75.4 kW·h,能全天候24 h为2台2匹空调提供电能。如外网每年再辅以4 050.9 kW·h电能用于谷物冷却机在粮温升高时对其进行降温,则1年内仓库中平均粮温维持在20℃条件下的时间达到10个月,可基本实现准低温储藏。

A solar photovoltaic power generation system was built on the roof of a granary in Hainan.Through the selection of photovoltaic power generation type,solar module,off-grid inverter,a off-grid solar photovoltaic power generation system was designed and layed,whose total DC output power is 29 160 W.Under normal circumstances,the system generates direct current average daily volume is 116 kW·h,the average system conversion efficiency is 0.65,can provide 220 V,50 Hz AC power 75.4 kW·h,can be all-weather 24 h for 2 sets of 2 air-conditioning to provide electricity.Such as an external network supplemented by 4 050.9 kW·h per year for the grain cooler to cool the grain temperature when it rises,the average grain temperature in the warehouse within 1 year is maintained at 20 ℃for 10 months,it can basically achieve quasi-low temperature storage.