太阳能复合热源系统最优集热参数匹配

Optimal Matching Parameter of Solar Composite Heat Source System

本文使用TRNSYS对几种太阳能复合热源系统在24小时连续稳定运行工况下进行模拟,并通过成本计算对比太阳能系统的净收益,并比较不同供水温度,集热器面积和水箱体积对净收益的影响。结果表明,通过监测蓄热水箱温度来控制辅助热源启停的系统具有更好的稳定性和经济性。供水温度和集热器面积对太阳能集热系统的净收益影响较大,供水温度越低净收益越大,在负荷一定时,不同供水温度对应的最优集热器面积基本相同。水箱体积对净收益的影响较小,可以结合实际进行选择。负荷在小幅度内波动对最优集热器面积的影响较小,且负荷越高净收益越大。

TRNSYS is used to simulate several kinds of solar thermal system in 24 hours continuous and stable operation condition. The net income of solar energy system is calculated and compared. The influence of water supply temperature,collector area and water tank volume are compared. The results show that the system of controlling the auxiliary heat source by monitoring the temperature of the storage tank has better stability and economy. The water supply temperature and the collector area have a great influence on the net income of the solar collector system. The lower the water supply temperature is, the larger the net income is, and the optimal collector area is basically the same when the load is constant.The impact of the tank volume on net income is small and can be designed with actual selection. Within a small range the effect of fluctuate of the load on the optimal collector area is small, and the higher the net income is, the higher the net income is.