中文摘要：

以TRNSYS程序为平台，对平板型太阳能热水器进行了模拟研究，TRNSYS模拟结果与试验结果的吻合较好。试验显示，不同天气下日总辐照量对太阳能热水器日平均效率的影响不大，日总辐照量在5．3～22．2MJ时，系统热效率稳定在52％左右。文章分析了典型天气条件下系统日平均有用能量输出与辅助能量的关系，为太阳能热水器辅助热源与集热面积的优化配置提供参考。

英文摘要：

A model and simulation of an experimental system of flat-plate solar water heater was presented on the platform of TRNSYS （Transient System Simulation） program. The results of TRNSYS simulation agree with the experimental result of the system well. The results indicated that the solar irradiance had few influence on the performance characteristics of the solar water heater under different weather conditions, the system efficiency kept around 52% when the daily total radiation varied from 5.3 MJ to 22.2 MJ. The relationship between the daily average efficiency and the auxiliary energy under typical weather conditions was analyzed in this article, which provide a reference for the design of the auxiliary energy of the solar water heater and the decision of the heat collector area.