建筑外表面热流及换热系数现场测试

朱新荣; 邱杨; 杨雯; 杨轩; 刘加平

doi:10.13204/j.gyjzG19113009

建筑外表面热流及换热系数现场测试

doi: 10.13204/j.gyjzG19113009

朱新荣^1,2,
邱杨²,
杨雯²,
杨轩²,
刘加平^1,2

1. 西安建筑科技大学建筑学院, 西安 710055;
2. 西部绿色建筑国家重点实验室, 西安 710055

基金项目:

国家自然科学基金青年科学基金项目（51308435）；陕西省教育厅专项科研项目（18JK0447，18JK0454）。

详细信息

作者简介:
朱新荣,女,1983年出生,博士,副教授。电子信箱:104380274@qq.com

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- 文章访问数: 144
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- 被引次数: 0
出版历程
- 收稿日期: 2019-11-30
- 刊出日期: 2020-10-17

FIELD TESTING OF HEAT FLUX AND HEAT EXCHANGE COEFFICIENTS ON BUILDING EXTERIOR SURFACE

1. School of Architecture, Xi'an University of Architecture and Technology, Xi'an 710055, China;
2. State Key Laboratory of Green Building in Western China, Xi'an 710055, China

摘要

摘要: 建筑表面换热系数是建筑热工与节能及能耗模拟的重要参数。为考察实际建筑表面的热流与换热系数动态变化，提高建筑能耗模拟的准确性，为设计标准提供基础参数数据，采用直接热平衡法，对西安某办公建筑外墙进行现场测试，得到外墙的对流、辐射及总换热热流，并在此基础上获得了表面的对流、辐射和总换热系数。结果表明：测试期间外墙表面辐射换热系数与对流换热系数分别在1.59~29.18 W/（m²·K）和0.14~7.56 W/（m²·K）之间变化；外墙辐射热流在白天占总热流比例约为85%，夜间约为50%；对低风速的自然风，建议采用最大频率的对流换热系数数值作为设计计算取值。
- 换热系数 /
- 对流 /
- 辐射 /
- 热流密度 /
- 现场测试
Abstract: Heat transfer coefficient of building surface is an important parameter for building thermal engineering, energy saving and energy consumption simulation. In order to investigate the dynamic changes of heat flow and heat transfer coefficient on the actual building surface, to improve the accuracy of building energy consumption simulation, and to provide basic parameter data for codes and standards, the direct heat balance method was adopted in this study. Field tests were carried out on the external walls of an office building in Xi'an, the convection/radiation and total heat flux of the external walls were obtained. On the basis of experiment, the convection heat transfer coefficient(CHTC), the radiation heat transfer coefficient(RHTC), and total heat transfer coefficient of the surface were obtained. The results indicated that the radiation and convection heat transfer coefficients of the external walls changed from 1.59 to 29.18 W/(m²·K) and 0.14 to 7.56 W/(m²·K), respectively. The radiation heat flux of the external walls accounted for 85% during the daylight and 50% during the night of the total heat flux. For the natural wind with low wind speed, the value of maximum frequency was suggested to be used as the design value.
- heat transfer coefficient /
- convective /
- radiative /
- heat flux density /
- field test

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