多孔蛭石含湿蒸发降温对光伏组件发电性能的影响  

EFFECT OF POROUS VERMICULITE MOISTURE EVAPORATION COOLING ON POWER GENERATION PERFORMANCE OF PHOTOVOLTAIC PANELS

作　　者：刘小钰 冉茂宇[1,2] Liu Xiaoyu;Ran Maoyu(School of Architecture,Huaqiao University,Xiamen 361021,China;Xiamen Key Laboratory of Ecological Building Construction,Xiamen 361021,China)

机构地区：[1]华侨大学建筑学院,厦门361021 [2]厦门市生态建筑营造重点实验室,厦门361021

出　　处：《太阳能学报》2023年第8期307-315,共9页Acta Energiae Solaris Sinica

摘　　要：为进一步提高光伏组件的冷却发电性能,该文选择多孔蛭石作为氯化钙盐和水的载体,研究多孔蛭石含盐吸放湿、蓄水蒸发、间歇喷淋3种降温方式对光伏组件上、下表面温度和发电性能的影响。研究结果表明:多孔蛭石载盐CaCl2可增加光伏发电量,但由于蒸发含水率较低、光伏组件背板散热热阻较大,其降温效果有限;多孔蛭石的储水蒸发可有效降低光伏组件温度,每天一次蓄水可满足每日蒸发需水量,与未降温的光伏组件相比,其发电效率可提高2.5%;相比于多孔蛭石储水蒸发冷却,间歇式喷淋与多孔蛭石储水相结合方式的发电效率提高了8.2%。To further improve the cooling power generation performance of photovoltaic panels,the porous vermiculite was selected as carriers of CaCl2 salt and water,and the effects of three cooling methods namely moisture absorption/desorption,water storage evaporation,intermittent spray,on the upper and lower surface temperatures and power generation performance of photovoltaic panels were investigated in this paper.It is found that porous vermiculite carried CaCl2 salt can increase photovoltaic power generation,but its cooling effect is limited due to lower evaporation moisture content and large thermal resistance for heat dissipation of photovoltaic panel back.The water storage evaporation of porous vermiculite can effectively reduce the temperature of photovoltaic panels;once water storage in a day can meet the water evaporation demand for a day;the power generation efficiency can increase by 2.5%compared with that of photovoltaic panels without cooling.The combination of intermittent spray and water storage in porous vermiculite can further increase the power generation efficiency up to 8.2%,compared with the evaporation cooling of water storage in porous vermiculite.

关 键 词：多孔材料 光伏发电 氯化钙 吸放湿 蒸发降温 

分 类 号：TK511[动力工程及工程热物理—热能工程]