作者：刘桂雄1, 黄坚1, 曾成刚2, 谭小卫3
作者单位：1. 华南理工大学机械与汽车工程学院, 广东 广州 510640;
2. 深圳市太科检测有限公司, 广东 深圳 519053;
3. 新菱空调(佛冈)有限公司, 广东 清远 511675
关键词：管程流体; 温度传感; 稳态径向传热
摘要：
针对管程流体温度测量在没有预留测量窗口情况下存在测量困难的问题,提出一种管程流体温度间接测量方法,该方法基于管道外壁与空气热交换、管壁热传导、管道内壁与管程流体对流传热等公式,推出稳态径向传热模型。已知管道的材料、内外径尺寸等,通过测量管道外壁温度、环境温度、管程流体流速,即可间接测量管程流体温度。试验表明:该方法具有较高测量精度,误差0.31℃,具有较好应用前景。
Method of tube side fluid temperature measurement based on steady state heat transfer through radial direction model
LIU Guixiong1, HUANG Jian1, ZENG Chenggang2, Tan Xiaowei3
1. School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, China;
2. Shen Zhen TAIKE Test Co., Ltd., Shenzhen 519053, China;
3. SINRO (Fogang) Air conditioning & Cooling Equipment Co., Ltd., Qingyuan 511675, China
Abstract: Tube side fluid temperature measurement has obtained the widespread application in energy efficiency testing. Aiming at the difficulty of temperature measuring without measurement window, a tube side fluid temperature indirect measurement method was proposed. The method was based on the steady state heat transfer through radial direction model, which deducing from heat transfer of air to tube, heat conduction of tube, and heat transfer of tube to water. Adopting this method, indirect measuring the temperature of tube side fluid required the data of tube specification and material, the temperature of pipeline outer surface, air temperature, and the velocity of flow. Experiments show that the proposed method has a well measurement accuracy, absolute error is less than 0.31 ℃, and a wide application prospect.
Keywords: tube side fluid; temperature sensing; radial steady heat transfer
2015, 41(1): 6-8 收稿日期: 2014-7-26;收到修改稿日期: 2014-8-15
基金项目: 广东省中小企业技术创新专项(2012CY166)
作者简介: 刘桂雄(1968-),男,广东揭阳市人,教授,博导,主要从事智能传感与检测技术研究。
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