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提出一种冲缝型吸热板结构,并对采用该结构的普通玻璃和真空玻璃盖板式冲缝型空气集热器的热性能进行研究。建立两种集热器的数学模型,并在实验的基础上,以空气出口温度和热效率作为评价指标,模拟研究不同参数对集热器热性能的影响。结果表明,在该文参数范围内,两种集热器的空气出口温度和热效率均随冲缝当量直径和室外风速增大而减小,随平均冲缝间距和环境温度增大而增大;空气出口温度随集热器送风量增大而减小,随空气进口温度升高而增大;热效率随集热器送风量增大而增大,随空气进口温度升高而减小;受真空玻璃透射率较低的影响,在室外环境条件良好时,真空玻璃盖板式集热器的热性能低于普通玻璃盖板式集热器。
This paper presents a kind of punch-type heat absorption plate structure, and studies the thermal performance of ordinary glass and vacuum glass cover-type punch-type air collector with this structure. Based on the experiment, taking the air outlet temperature and thermal efficiency as evaluation indexes, the influence of different parameters on the thermal performance of the heat collector was simulated. The results show that the air outlet temperature and thermal efficiency of the two collectors decrease with the increase of the equivalent diameter and the outdoor wind speed of the collector, and increase with the increase of the average pitch and the ambient temperature. Air outlet temperature decreases with the increase of collector air volume and increases with air inlet temperature. Thermal efficiency increases with the increase of collector air volume and decreases with air inlet temperature. Due to the low transmittance of vacuum glass, the thermal performance of vacuum glass-covered collectors is lower than that of ordinary glass-covered collectors when the outdoor environmental conditions are good.