文档介绍：加热设备《工业加热》第 37 卷 2008 年第 2 期
蒸发冷却板式换热器的传热与阻力实验研究
胡晓伟,张旭
(同济大学机械工程学院暖通空调研究所,上海 200092)
摘要:通过对板式换热器传热的理论分析和在干工况、喷淋工况下的实验研究,得出板式换热器在喷淋情形下空气侧喷淋水量对强
化对流传热系数的影响关系,进而拟合出喷淋情形下空气侧的对流传热系数的关联式。同时为了综合考虑由于喷淋造成的换热器性
能的变化,还对喷淋前后空气侧的阻力变化进行了测试分析。
关键词:板式换热器;传热效率;对流传热系数
中图分类号: 憲文献标志码:A 文章编号:1002-1639(2008)02-0027-03
Experimental Study on Heat Transfer and Pressure Drop When Sprinkling Water to the Surface of Plate Heat Exchanger
HU Xiao-wei,ZHANG Xu
(Institute of HVAC, Tongji University, Shanghai 200092, China)
Abstract: Through the theory analysis of the plate heat exchanger and the experiments of the plate heat exchanger when work in dry operation
and sprinkling water to the surface of it, we get how much the convection coefficient increased when sprinkling water to the surface of the heat
exchanger. After that, we can give the formula of the convection coefficient of the sprinkling water to the surface of the heat exchanger. At
the same time, in order to consider more performance changed of the heat exchanger when sprinkling water to it, we analyzed the pressure
drop of the air side when sprinkling water.
Key words: plate heat exchanger;heat transfer efficiency;convection coefficient
换热器是各种换热设备中非常关键的部分,在化工, 用精度为 ℃水银温度计进行测定。
冶金,电力,制冷,轻工等企业中占着很重要的地位。相
对于管式换热器来说,板式换热器拥有换热性能更好,体
积更小,价格更低 1 ,一个世纪以来它在单相领域中得到
了广泛的应用。
蒸发式冷却器相对于其它型式的冷却器来说,由于
其利用了物质相变的能量,因此其传热性