Experimental Study on Heat Transfer Characteristics and Pressure Drops for Water Flowing in Spiral Coil Heat Exchanger

被引：1

作者：

Zhang, Xiaoyan ^{[1
]}

Jiang, Fangfang ^{[1
]}

Zhao, Shanyuan ^{[1
]}

Tian, Wenfei ^{[1
]}

Chen, Xiaohang ^{[1
]}

机构：

[1] Xian Univ Sci & Technol, Sch Energy Engn, Xian 710054, Shaanxi, Peoples R China

来源：

THERMAL, POWER AND ELECTRICAL ENGINEERING, PTS 1 AND 2 | 2013年 / 732-733卷

关键词：

Spiral Coil; Heat Transfer; Pressure Drop;

D O I：

10.4028/www.scientific.net/AMR.732-733.593

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The heat transfer and pressure drop characteristics for water flowing in four spiral coils with different shapes and different sizes were experimental studied. Reynolds number range from 4000 to 9000, volume flow rate range from 200 to 350 L/h and heating power range from 80-350 W. Based on the experimental results, the regularity of Reynolds number and heating power influencing on heat transfer and pressure drop characteristics was analyzed and discussed. The results indicate: the Nu increases with increasing Re, the greatest average heat transfer coefficient appears in the smaller circular spiral coil. The heat transfer coefficients increase with increasing heating power, the greatest average heat transfer coefficient also appears in the smaller circular spiral coil. The pressure drops increase with increasing Re, the pressure drop in big ellipse spiral coil is greatest. The resistance coefficients gradually decrease with increasing Re. The resistance coefficient of small circular spiral coil is always greatest, and the resistance coefficient of big circular spiral coil is smallest.

引用

页码：593 / 599

页数：7

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