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研究了太阳能空气集热器Ⅰ型的传热性能,建立了基于一维假设下的热量传递的数学模型,导出了准静态条件下沿程温度分布、出口温度、全天集热效率的近似解.通过计算,分析了进口温度、工质流速、流道深度对集热器传热性能的影响,计算结果表明全天集热效率随工质流速的增大而增大、随进口温度的升高而急剧下降、随着流道深度的增加,集热效率迅速增大到最大值后逐渐减小
The heat transfer performance of solar air heater type Ⅰ was studied. The mathematical model of heat transfer based on one - dimensional assumption was established and the approximate solution of temperature distribution, outlet temperature and heat collection efficiency under quasi - static conditions was derived. The effects of inlet temperature, working fluid velocity and flow channel depth on the heat transfer performance of the collector were analyzed. The calculation results show that the heat collection efficiency increases with the increase of the working fluid velocity. With the increase of inlet temperature, Steep decline, with the increase of runner depth, heat collection efficiency rapidly increased to the maximum and then gradually reduced