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Study on Convective Heat Transfer Coefficient in a Room

房间内对流传热系数的研究

基本信息

批准号：
24760472
负责人：
OGASAWARA TAKESHI
金额：
$ 2.91万
依托单位：
Meisei University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Young Scientists (B)
财政年份：
2012
资助国家：
日本
起止时间：
2012-04-01 至 2014-03-31
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-24760472/
关键词：
対流熱伝達率局所対流熱伝達率

项目摘要

Convective heat transfer coefficient of building elements is an important parameter to evaluate indoor thermal environment and heat load in air-conditioned and ventilated buildings. In this study, we examined the indoor convective heat transfer coefficient using 2-point temperature measuring sensor situated in viscous sub-layer near wall. We have developed a technique that can be applied to measure both for steady-state and transient convective heat transfer coefficients. We found convective heat transfer coefficient in a room with floor heating system significantly smaller than with using air-conditioner for heating, due to the difference in air velocity near wall surface. We also found that convective heat transfer coefficient tended to increase as increasing temperature difference between wall surface and adjacent air.

建筑构件对流换热系数是评价空调通风建筑室内热环境和热负荷的重要参数。在本研究中，我们使用安装在靠近墙壁的粘性亚层中的两点测温传感器来检测室内对流换热系数。我们开发了一种可以同时测量稳态和瞬态对流换热系数的技术。我们发现地板采暖房间的对流换热系数明显小于空调采暖房间，这是由于壁面附近空气流速的差异造成的。对流换热系数随壁面与周围空气温差的增大而增大。