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首页> 外文会议>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：腔壁温度和开口比对太阳能腔接收机自然对流热损失特性的影响

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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能腔接收机的自然对流热损失特性。结果表明，自然对流热损失，对流传热系数和露面数随开口比的增量而增加。然而，由于考虑了本研究中的空气的物理性质变化，自然对流热损失和对流传热系数随着空腔壁温的升高而增加，而腔室壁温升高则尤塞格数减少。此外，对于具有小开口率的接收器，腔壁温度对对流传热系数和篮板数具有极大的影响，相反，腔壁温度变化将导致自然对流热损失特性的显着变化开口比变大。

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