Numerical investigation on heat transfer characteristics of the plate air heater with variable channels and experimental validation

被引：1

作者：

Li, Haowen ^{[1
]}

Wu, Lijun ^{[1
]}

Yuan, Zhicheng ^{[1
]}

Yuan, Zhaokuo ^{[1
]}

机构：

[1] Tongji Univ, Sch Mech Engn, Shanghai 201804, Peoples R China

来源：

APPLIED THERMAL ENGINEERING | 2017年 / 122卷

基金：

中国国家自然科学基金;

关键词：

New plate air heater; Experiment; Numerical simulation; Phase change heat transfer; TRANSFER ENHANCEMENT; PRESSURE-DROP; EXCHANGER; FLOW; PERFORMANCES; CFD; OPTIMIZATION; DESIGN;

D O I：

10.1016/j.applthermaleng.2017.03.136

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

This paper presents a novel plate air heater using steam as the high temperature fluid. The heat transfer characteristics of the air heater were numerical simulated in different steam and air volume flow rates with Fluent and a user-defined function (UDF) as well as verification by experiment. The results showed the variable channel structure of the new plate air heater promptly condensed liquid discharge, reduced the thickness of the steam film and improved the speed of condensing steam. In this experimental model, when the temperature of the steam side reached 120 degrees C, the flow rate was 12 m(3) . h(-1) and the air side flow was 480 m(3) . h(-1). The total heat transfer coefficient was approximately 70 W (m(2).K)(-1) and the drop in pressure of the steam side was less than 1 kPa. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：546 / 554

页数：9

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