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首页> 外文会议>2011 International Conference on Computer Distributed Control and Intelligent Environmental Monitoring >Effect of Cavity Wall Temperature and Opening Ratio on the Natural Convection Heat Loss Characteristics of a Solar Cavity Receiver
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Effect of Cavity Wall Temperature and Opening Ratio on the Natural Convection Heat Loss Characteristics of a Solar Cavity Receiver

机译：腔壁温度和开口率对太阳腔接收器自然对流散热特性的影响

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摘要

The natural convection heat loss characteristics of a solar cavity receiver have been investigated by numerical simulation method. The results show that, the natural convection heat loss, the convection heat transfer coefficient and Nusselt number increase with the increment of opening ratio. However, due to the consideration of physical property variation of air in this study, the natural convection heat loss and the convection heat transfer coefficient increases with the elevation of cavity wall temperature while Nusselt number decreases as cavity wall temperature rises. Moreover, for a receiver with small opening ratio, the cavity wall temperature has extremely subtle effect on the convection heat transfer coefficient and Nusselt number, on the contrary, the cavity wall temperature variation will lead to notable change in the natural convection heat loss characteristics when the opening ratio becomes larger.
机译：通过数值模拟方法研究了太阳腔接收器的自然对流热损失特性。结果表明，自然对流热损失，对流传热系数和Nusselt数随开孔率的增加而增加。然而，由于考虑到空气的物理性质变化，自然对流热损失和对流传热系数随腔壁温度的升高而增加，而Nusselt数随腔壁温度的升高而降低。此外，对于开口率小的接收器，腔壁温度对对流传热系数和努塞尔数具有极微妙的影响，相反，腔壁温度变化会导致自然对流热损失特性发生显着变化。开口率变大。

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