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设计一种新型平板型、渗透式太阳空气集热器,以该集热器为研究对象,建立能量转换与传递模型,开发模拟计算程序,并通过实验测试证明此程序准确、可靠。以出风温度和集热效率为评价指标,研究集热器关键结构参数和运行参数对集热器性能的影响规律。结果表明,随着送风量增大,出风温度逐渐降低,集热效率逐渐升高,但变化趋势均渐于平缓;随着室外温度增高,出风温度和集热效率升高;随着盖板透过率增大,出风温度和集热效率升高,且基本呈线性变化;随着集热板高度增大,出风温度升高,且近似呈对数变化,而集热效率降低;随着孔缝当量直径增大,出风温度和集热效率降低,其中出风温度近似呈线性变化,集热效率近似呈指数变化;随着孔缝平均间距增大,出风温度和集热效率升高,出风温度近似呈线性变化,集热效率近似呈指数变化。
A new type of solar collector with flat plate and penetrating solar air is designed. Based on the collector, the model of energy conversion and transfer is established, and the simulation calculation program is developed. The experimental results show that the program is accurate and reliable. Taking the outlet air temperature and heat collecting efficiency as the evaluation indexes, the influence laws of the key structural parameters and operating parameters of the collector on the performance of the collector were studied. The results show that with the increase of air supply, the outlet air temperature gradually decreases and the heat collection efficiency gradually increases, but the changing trend gradually becomes gentle. With the increase of outdoor temperature, the outlet air temperature and heat collection efficiency increase. With the increase of collector height, the temperature of the outlet air increases, and the change of logarithm is logarithmically, while the efficiency of heat collection decreases. With the increase of the transmissivity, the outlet air temperature and collector efficiency increase with the increase of the collector plate height. The equivalent pore diameter increases, the outlet air temperature and collector efficiency decrease, and the outlet air temperature changes approximately linearly, and the collector efficiency changes exponentially. With the increase of the average pore spacing, the outlet air temperature and collector efficiency increase The wind temperature changes approximately linearly, and the heat collection efficiency changes exponentially.