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所建立的太阳集热器动态模型不同于传统模型是因为其考虑了集热器容水量的热容对集热器热特性的影响。研究了该模型与传统模型的区别,分析了不同类型容水量对集热器出水水温、集热系统水泵的启停控制、有效集热量的影响。结果显示:水热容对全玻璃真空管集热器的出水温度影响明显;对于容水量较小的平板式集热器,水热容的影响相对较小;减少容水量会增加水泵开启时间,增加有效集热量。
The established dynamic model of solar collector is different from the traditional model because it considers the influence of the heat capacity of collector capacity on thermal characteristics of the collector. The difference between the model and the traditional model is studied. The influence of different types of water content on the water temperature of the collector, the on-off control of the collector pump and the effective heat gain are analyzed. The results show that the influence of water heat capacity on water temperature of all-glass vacuum tube collector is significant. For plate-type collectors with smaller water content, the influence of water heat capacity is relatively small. Reducing the water content will increase the pump opening time and increase Effective heat collection.