耦合天空辐射制冷的微通道分离式热管系统性能研究

程归; 陈晓明; 李兴友

doi:doi:10.19912/j.0254-0096.tynxb.2024-2178

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耦合天空辐射制冷的微通道分离式热管系统性能研究

更新时间：2026-07-22

- 耦合天空辐射制冷的微通道分离式热管系统性能研究
- Vol. 47, Issue 4, Pages: 782-790(2026)
- 作者机构：
- 作者简介：
- 基金信息：
- DOI：doi:10.19912/j.0254-0096.tynxb.2024-2178
  CLC： TK172
- Online First：08 May 2026，
  
  Published：2026
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程归, 陈晓明, 李兴友. 耦合天空辐射制冷的微通道分离式热管系统性能研究[J]. 2026, 47(4): 782-790.
DOI：

程归, 陈晓明, 李兴友. 耦合天空辐射制冷的微通道分离式热管系统性能研究[J]. 2026, 47(4): 782-790. DOI： doi:10.19912/j.0254-0096.tynxb.2024-2178.

摘要

为提高微通道分离式热管的能效

提出一种耦合天空辐射制冷的微通道分离式热管系统。基于流体体积方法

建立系统的数值计算传热模型

数值研究系统在不同天空有效温度下的换热特性。结果表明

与传统微通道分离式热管系统相比

耦合系统具有更高的工质流速和换热系数

显著提高了系统的制冷功率和能效比（EER）。由于受太阳辐射的影响

耦合系统在夜间的节能收益优于在白天的

相比于传统系统的性能提高率分别为11%~22.7%和6.6%~13.8%。天空有效温度越低

耦合系统的节能效果越显著。此外

探讨辐射制冷换热器面积、风量以及室内空气温度对系统性能的影响。研究发现

辐射制冷换热器面积越大

系统的制冷功率和EER越高。当辐射制冷换热器面积从0.15 m2增加到1.79 m2时

制冷功率由719 W增大到861 W

EER从9.22增大到11.04

两者均提高了19.7%。

Abstract

To enhance the energy efficiency of microchannel separated heat pipes

a microchannel separated heat pipe system coupled with sky radiative cooling has been proposed. A numerical heat transfer model of the proposed system is established based on the volume-of-fluid method. The is characteristics of the system under various effective sky temperatures are numerically studied. The results indicate that compared to traditional microchannel separated heat pipe systems

the coupled system has higher working fluid flow rates and heat transfer coefficients

and therefore higher cooling capacity and energy efficiency ratio （EER）. Due to the influence of solar radiation

energy saving potential by the coupled system is higher at night than in the daytime

with an improvement rate over the traditional system of 11%-22.7% and 6.6%-13.8%

respectively. The lower the effective sky temperature

the higher the energy saving potential can be obtained by the coupled system. Additionally

the influences of radiative cooling heat exchanger area

airflow rate

and indoor air temperature on the performance of the coupled system are discussed. It is found that the larger the radiative cooling heat exchanger area

the higher the cooling capacity and EER can be obtained. As the radiative cooling heat exchanger area increases from 0.15 m² to 1.79 m²

the cooling capacity rises from 719 W to 861 W

and the EER ranges from 9.22 to 11.04

which are increased by 19.7%.

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Keywords

references

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