DSG 槽式太阳能腔体式集热管分层流区的热性能研究

摘要

Using a numerical simulation of a nelliptical cavity absorber and vacuum absorber, heat transfer coefficient and thermal gradient of the stratified flow areas of both absorbers are ana-lyzed.The results show an increase of heat trans-fer coefficient in the cavity absorber,but the struc-ture still needs to be improved,because the ther-mal gradient remains high.%针对一种椭圆形腔体式集热管和真空集热管，通过数值模拟的方法，对该集热管在分层流区域的换热系数和温度梯度进行分析研究。结果表明该腔体式集热管能够提高分层流区域的换热系数，但是集热管壁面的温度梯度并没有得到有效的降低，结构有待进一步改进。