天气对槽式太阳能集热系统热性能的影响  

EFFECT OF WEATHER ON THERMAL PERFORMANCE OF TROUGH SOLAR COLLECTOR SYSTEM

作　　者：王迪 王华[1] Wang Di;Wang Hua(School of Mechanical and Power Engineering,Henan Polytechnic University,Jiaozuo 454000,China)

机构地区：[1]河南理工大学机械与动力工程学院,焦作454000

出　　处：《太阳能》2023年第12期59-66,共8页Solar Energy

摘　　要：槽式太阳能集热系统可以提供100~300℃的中温热源,为研究天气状况对其热性能的影响,以集热面积为15.3m^(2)的槽式太阳能集热系统为例,研究了河南省焦作地区4种典型天气(晴天、阴天、雾霾、多云)下,天气、法向太阳直接辐照度、集热器入口流体温度对该集热系统集热效率和㶲效率的影响。研究结果表明:1)在4种典型天气下,晴天时,槽式太阳能集热系统的集热效率和㶲效率最高,分别为53.0%和50.7%;雾霾天气时槽式太阳能集热系统的集热效率和㶲效率最低。2)法向太阳直接辐照度和集热器入口流体温度对集热效率和㶲效率的影响规律相同。3)在10:00前集热效率和㶲效率都呈增长趋势,集热器入口流体温度在32.9~71.4℃时,槽式太阳能集热系统的集热效率和㶲效率均维持在40%以上。A trough solar collector system can provide a medium temperature heat source of 100~300℃.To study the influence of weather conditions on its exergy performance,this paper takes a trough solar collector system with a heat collection area of 15.3 m^(2) as an example to study the effects of weather,direct normal solar irradiance,and heat collector inlet fluid temperature on the collection efficiency and exergy efficiency of the system under four typical weather conditions(sunny,overcast,haze,and cloudy)in Jiaozuo area,Henan Province.The research results show that:1)Under four typical weather conditions,on sunny days,the trough solar collector system has the highest heat collection efficiency and exergy efficiency,with 53.0%and 50.7%,respectively;During haze weather,the heat collection efficiency and exergy efficiency of trough solar collectors are the lowest.2)The influence of direct normal solar irradiance and the inlet fluid temperature of the heat collector on the heat collection efficiency and exergy efficiency follows the same pattern.3)Before 10:00 am,both the heat collection efficiency and exergy efficiency showed an increasing trend.When the inlet fluid temperature of the heat collector is between 32.9 and 71.4℃,the heat collection efficiency and exergy efficiency of the trough solar collection system remained above 40%.

关 键 词：槽式太阳能集热系统 法向太阳直接辐照度 集热效率 㶲效率 

分 类 号：TK515[动力工程及工程热物理—热能工程]