摘要
为了探寻一种在中高温场合使用的平板式太阳能集热器,设计和开发了小流量、大温差的蛇形管平板式太阳能集热器,并进行了空晒试验和瞬时效率试验。试验结果表明:集热器的空晒温度可达170.2℃,热损系数为5.239 W/(m2.℃),载热工质进口温度70℃时效率52%—55%。通过对集热器各部分温度变化趋势的比较,提出改进措施,以提高蛇形管平板式集热器在中高温工况下的集热性能。
A serpentine-flow flat-plate solar collector of small volume and large temperature difference is designed and developed in order to explore the flat-plate solar collector used in high temperature situation.And experiment of stagnation and instantaneous efficiency is carried out.The results shown that stagnation temperature can reach 170.2 ℃ and heat loss coefficient is 5.239 W/（m2·℃）.Efficiency of solar collector between 52% —55% when inlet temperature of working fluid is 70 ℃.By comparison the temperature trend of various parts of the collector the corrective measure is proposed to improve performance of serpentine-flow flat-plate solar collector in high temperature conditions.
出处
《科学技术与工程》
2011年第7期1441-1446,共6页
Science Technology and Engineering
基金
国家自然科学基金(51066002/E060701)资助
关键词
太阳能
蛇形管平板式集热器
空晒试验
集热效率
solar energy serpentine-flow flat-plate collector experiment of stagnation thermal efficiency
