水箱上热水入口位置对带辅助电加热器自然循环太阳能热水系统运行特性的影响

EFFECTS OF THE HOT WATER INLET POSITION ON THE STORAGE TANK ON PERFORMANCE OF A THERMOSYPHON SOLAR WATER HEATER WITH AN AUXILIARY ELECTRIC HEATER

辅助电加热器的加入,无疑使自然循环太阳能热水系统的运行特征变得更为复杂,也使得对此种系统的性能模拟和理论分析变得更加困难。利用作者建立的“固定节点等量对流混合模型”,本文根据理论计算机模拟详细探讨了水箱上热水入口位置对带辅助电加热器自然循环太阳能热水系统运行特性的影响,并首次揭示出一些以前未知的规律,为此种系统走向最佳化设计和实际工程应用奠定坚实的基础。

When there is an auxiliary electric heater operating in storage tank, the performance of a thermosyphon solar water heater will become more complex, and it will be more difficult to simulate the system performance. Based on the 'fixed-node, equally-convected mixing model' developed by the authors, the effects of hot water inlet position on storage tank on the system performance were studied by computer simulation. In this paper, some new laws governing system performance were discovered for the first time. It is believed that our study results will be very beneficial for the designs and practical engineering applications of such a system.