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在理论分析的基础上,对闷晒式和自然循环式太阳热水器的热性能进行了实验研究,证明非稳态效率方程可用于描述热水器的运行规律。通过理论和实验的比较,定量地给出了阳光入射角对热水器效率的影响。大量的实验数据还证实,非稳态效率方程和平均日效率两种方法是统一的,它们只是以不同的形式反映出太阳热水器的热性能。
On the basis of theoretical analysis, the thermal performance of stuffy-tanned and natural circulation solar water heaters is experimentally studied, and the unsteady efficiency equation can be used to describe the operating rules of water heaters. Through the comparison of theory and experiment, the effect of sunlight incident angle on water heater efficiency is given quantitatively. A large number of experimental data also confirm that the unsteady efficiency equation and the average daily efficiency of the two methods are unified, they only reflect the different forms of solar water heater thermal performance.