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提出一种盖板式冲缝型集热器,将吸热板设置成冲缝型,提高换热效果,改善集热器内部气流组织。利用实验数据回归得到气流穿过吸热板时的局部阻力系数经验关系式,证实该集热器的优越性。在对传热模型进行实验验证的基础上,采用空气进出口温升和有效效率为综合评价指标,模拟优化集热器的结构参数和运行参数。结果表明,最佳的平均冲缝间距、冲缝当量直径、集热器高度、空气流量(单位集热面积的流量)范围分别为0.08~0.12m、0.008~0.012m、1.8~3.0m、40~80m3/h(0.012~0.025m/s)。
A cover-type stamping type collector is proposed. The heat-absorbing plate is provided with a punch type to improve the heat exchange effect and improve the air flow structure inside the collector. The empirical relationship between the local drag coefficient and the airflow passing through the heat absorption plate is obtained by regression of the experimental data, confirming the superiority of the collector. Based on the experimental verification of the heat transfer model, the air inlet and outlet temperature rise and effective efficiency are taken as the comprehensive evaluation indexes to simulate the structural parameters and operating parameters of the optimized collector. The results show that the optimum average pitch, the equivalent diameter of the punch, the height of the collector and the flow of air (the flow rate per collector area) are 0.08 ~ 0.12m, 0.008 ~ 0.012m, 1.8 ~ 3.0m, 40 ~ 80m3 / h (0.012 ~ 0.025m / s).