基于辐射原理狭窄垂直封闭空腔热阻强化措施的实验研究

李思思; 周文和; 何炫; 王良璧

doi:10.11889/j.1000-3436.2017.rrj.35.020801

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基于辐射原理狭窄垂直封闭空腔热阻强化措施的实验研究

辐射物理 | 更新时间：2021-12-10

- 基于辐射原理狭窄垂直封闭空腔热阻强化措施的实验研究
- Experimental study on improvinging thermal resistance of vertical enclosures based on radiation principle
- 辐射研究与辐射工艺学报 2017年35卷第2期页码：20801
- 作者机构：
  
  1.兰州交通大学环境与市政工程学院兰州 730070
  2.兰州交通大学铁道车辆热工教育部重点实验室兰州 730070
- 作者简介：
  
  [ "李思思, 女, 1989年8月出生, 2013年毕业于青岛理工大学, 现在兰州交通大学就读研究生, 供热、供燃气、通风及空调工程, E-mail:961376208@qq.com", "LI Sisi (female) was born in August 1989, and graduated from Qingdao Technological University in 2013. Now she is a master candidate at Lanzhou Jiaotong University, engaging in heating, gas supply, ventilation and air conditioning engineering.E-mail:961376208@qq.com" ]
  周文和, 博士, 副教授, E-mail:zwh6888@mail.lzjtu.cnPh.D. ZHOU Wenhe, associate professor, E-mail:zwh6888@mail.lzjtu.cn
- 基金信息：
  
  国家自然科学基金(51466007)
- DOI：10.11889/j.1000-3436.2017.rrj.35.020801
  中图分类号：
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李思思, 周文和, 何炫, 等. 基于辐射原理狭窄垂直封闭空腔热阻强化措施的实验研究[J]. 辐射研究与辐射工艺学报, 2017,35(2):20801.

Sisi LI, Wenhe ZHOU, Xuan HE, et al. Experimental study on improvinging thermal resistance of vertical enclosures based on radiation principle[J]. Journal of Radiation Research and Radiation Processing, 2017,35(2):20801.
李思思, 周文和, 何炫, 等. 基于辐射原理狭窄垂直封闭空腔热阻强化措施的实验研究[J]. 辐射研究与辐射工艺学报, 2017,35(2):20801. DOI： 10.11889/j.1000-3436.2017.rrj.35.020801.

Sisi LI, Wenhe ZHOU, Xuan HE, et al. Experimental study on improvinging thermal resistance of vertical enclosures based on radiation principle[J]. Journal of Radiation Research and Radiation Processing, 2017,35(2):20801. DOI： 10.11889/j.1000-3436.2017.rrj.35.020801.

摘要

列车车体围护结构中普遍存在的狭窄空腔增加了车体围护结构的热阻，同时也为进一步降低空腔的辐射换热份额创造了条件。通过实验方法，利用粘贴铝箔方式改变空腔内壁面辐射特性，以期改善空腔热工性能效果进行了研究。结果发现：常规车体壁面空腔辐射换热份额很大，不容忽视；在空腔内壁面附着铝箔等高反射率表层，可有效降低空腔的辐射换热份额，且随着空腔厚度的增大，空腔当量导热系数降低的效果更为明显，最大可达无铝箔空腔的62%左右；冷面单面粘贴铝箔方式的效果与热面单面粘贴铝箔方式的效果几乎相同，双面粘贴铝箔方式效果最好，优于单面铝箔方式5%左右。

Abstract

The narrow space in a railcar body increase its thermal resistance and also enable improving the thermal resistance of the railcar body based on the radiation principle. In this study, the improvement of the thermal resistance by pasting aluminum foils on the inner surfaces of the enclosure has been tested. The results show that the heat radiation in the enclosure cannot be neglected because the amount of radiated heat is very large. An effective method to reduce the heat radiation in the enclosure involves pasting aluminum foils on the inner surfaces, and the effect becomes increasingly obvious, with up to 62% reduction in the radiated heat, as the enclosure thickness. Further, the improvement in the enclosure thermal resistance by pasting aluminum foils on one of the inner surfaces is almost the same whether on the cold side or the hot side, and the improvement when both inner surfaces are covered with aluminum foils is about 5% better than that when one surface is covered.

关键词

狭窄空腔辐射换热强化空腔热阻当量导热系数

Keywords

Narrow enclosureHeat radiationImproving thermal resistanceEquivalent thermal conductivity

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