摘要
根据U型管太阳能集热器的内部结构的换热特点推导了U型管式太阳集热器的瞬时效率公式,建立了U型管太阳能集热器的能量平衡和等效肋片模型两种传热模型,通过数值计算在不同的环境温度、铝翼的平均温度和不同的太阳辐照强度下计算出U型管集热器的瞬态效率,并利用最小二乘法分别拟合出真空管的瞬态效率公式。与实测结果相比,两种方法均与试验数据基本吻合,其中能量平衡模型的归纳式误差更小一些。
On the basis of studying inter-thermal performance of U-tube solar collector, the transient efficiency and efficiency factor were got. As for analyzing the thermal performance of the collector from different angles, two models were developed. By using numerical method each part of the collector were got. Furthermore, by weighted least square method, the instantaneous efficiency of solar collector was got. Experimental results coincide with theoretical calculations well.
出处
《能源技术》
2010年第6期334-337,共4页
Energy Technology
关键词
U型管式真空管集热器
瞬时效率
热性能
U-tube solar collector
instantaneous efficiency
thermal performance
