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首页> 外文期刊>太陽エネルギ- >Cooling power enhancement of CPC (compound parabolic concentrator) sky radiator (1st report: optimal design and experiment for 2-D CPC sky radiator)
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Cooling power enhancement of CPC (compound parabolic concentrator) sky radiator (1st report: optimal design and experiment for 2-D CPC sky radiator)

机译：CPC（复合抛物线集中器）天空散热器的冷却功率增强（第一报告：二维CPC CPC天空散热器的优化设计和实验）

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摘要

In order to enhance the performance of sky radiation cooling, we have proposed a compound parabolic concentrating (CPC) sky radiator. The CPC-type sky radiator has following features; the incident sky radiation within the acceptance angle is concentrated and absorbed by the radiating surface after one or more reflections on the mirror. While the incident sky radiation which does not fall within acceptance angle is reflected by the mirror and returned back to the sky without being absorbed. On the other hand, almost all of radiation emitted at the radiating surface passes through the aperture cover, and are rejected to the sky, either directly or with one or more reflections. Therefore, the total amount of the radiation emitted from the radiating surface will become larger than that of the conventional fiat plate sky radiator. In the present paper, we optimize the 2-D geometry of the CPC sky radiator and conduct experimental verification. The results demonstrate that the improved 2-D CPC sky radiator has greater performance of cooling power than the previous CPC sky radiator, which was originally designed as the solar collector. Further, a universal plot using P{sub}(SR)/R and △T/R was proposed for better understanding to include atmospheric radiation and heat losses.
机译：为了提高天空辐射冷却的性能，我们提出了一种复合抛物线集中式（CPC）天空辐射器。 CPC型天窗具有以下特点：在接受角内的入射天空辐射在反射镜上反射一次或多次后会被辐射表面集中并吸收。而未落在接受角内的入射天空辐射被镜子反射并返回到天空而未被吸收。另一方面，几乎所有在辐射表面发射的辐射都通过光圈盖，并直接或通过一个或多个反射被拒绝向天空。因此，从辐射表面发射的辐射的总量将变得比传统的平直板天辐射器的总量大。在本文中，我们优化了CPC散热器的二维几何形状并进行了实验验证。结果表明，改进的二维CPC空气辐射器比以前设计为太阳能集热器的先前CPC空气辐射器具有更好的冷却能力。另外，为了更好地理解大气辐射和热量损失，提出了使用P {sub}（SR）/ R和△T / R的通用图。

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