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Comparison of receivers for solar dish collector system

机译：太阳能集热器系统接收器的比较

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摘要

In this paper, a numerical investigation is performed to study the natural convective heat loss from three types of receivers for a fuzzy focal solar dish concentrator, namely cavity receiver, semi-cavity receiver and modified cavity receiver. The natural convection heat loss from the receivers is estimated by varying the inclination from 0° (cavity aperture facing sideways) to 90° (cavity aperture facing down). The orientation and geometry of the receiver strongly affect the natural convection heat loss. A comparative study is performed to predict the natural convection heat loss from the cavity, semi-cavity and modified cavity receivers. The convection heat loss is high at 0° and decreases monotonically with increase in angle up to 90° in all three cases. The convection heat losses at 0° and 90° inclination of the modified cavity receiver are 26.03% and 25.42% of the convection heat loss of the cavity receiver, respectively. The influence of area ratio (A_w/A_1) on the convective heat loss is investigated for the modified cavity receiver, and an optimum A_w/A_1 of 8 is found for minimum natural convection heat loss. Among the three receivers, the modified cavity receiver is the preferred receiver for a fuzzy focal solar dish collector system.
机译：本文进行了数值研究，研究了模糊聚焦太阳能碟形聚光器的三种接收器的自然对流热损失，它们分别是空腔接收器，半空腔接收器和改进的空腔接收器。接收器的自然对流热损失是通过将倾斜度从0°（腔孔面向侧面）更改为90°（腔孔朝下）来估算的。接收器的方向和几何形状强烈影响自然对流热损失。进行了一项比较研究，以预测腔，半腔和改进型腔接收器的自然对流热损失。对流热损失在0°时较高，并且在所有三种情况下都随着角度的增加而单调减少，直至90°。改进型腔体接收器在0°和90°倾角处的对流热损失分别为腔体接收器对流热损失的26.03％和25.42％。研究了改进型腔体接收器的面积比（A_w / A_1）对流热损失的影响，发现最佳的A_w / A_1为8，以使自然对流热损失最小。在这三个接收器中，改进的空腔接收器是模糊聚焦太阳能集热器系统的首选接收器。

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