A new type of liquid-suction heat exchanger for automotive air conditioning system

WANG Yan; YANG Jianfeng; ZENG Min; WANG Qiuwang

doi:10.3969/j.issn.0438-1157.2014.z1.043

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A new type of liquid-suction heat exchanger for automotive air conditioning system

更新时间：2025-12-10

- A new type of liquid-suction heat exchanger for automotive air conditioning system
- CIESC Journal Issue S1, Pages: 264-271(2014)
- 作者机构：
  
  1. 中国船舶重工集团公司第七○四研究所,上海,200031
  2. 西安交通大学热流科学与工程教育部重点实验室,陕西,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2014.z1.043
  CLC： K124
- Online First：30 May 2014，
  
  Published：30 May 2014
- 稿件说明：
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WANG Yan, YANG Jianfeng, ZENG Min, et al. A new type of liquid-suction heat exchanger for automotive air conditioning system[J]. CIESC Journal, 2014, (S1): 264-271.
DOI：

WANG Yan, YANG Jianfeng, ZENG Min, et al. A new type of liquid-suction heat exchanger for automotive air conditioning system[J]. CIESC Journal, 2014, (S1): 264-271. DOI： 10.3969/j.issn.0438-1157.2014.z1.043.

摘要

带有气-液回热器的空调制冷系统已经被广泛使用，对相同几何尺寸的传统管壳式汽车空调回热器和新型连续螺旋折流板式回热器进行对比性的数值模拟研究。结果表明：以制冷剂R404A为工质，在相同质量流量下，回热器整体换热量提高32.2%，总传热系数提高41.7%；壳侧为制冷剂液体，壳侧平均传热系数提高3.5倍，同时壳侧压损也提高11倍；管侧为制冷剂气体，管侧平均传热系数和压损几乎不变。换热器整体回热效率从0.21提高到0.29，提高了38.1%。

Abstract

Liquid suction heat exchangers are commonly installed in refrigeration system with the intent of ensuring proper system operation and increasing system performance. Previous researchers have investigated performance of liquid suction heat exchangers

and some of them have concluded that the relative capacity change index (RCI) will increase with the increasing of heat recovery efficiency for certain refrigerants. In this study

two kinds of liquid suction exchangers set up with different baffles are numerical simulated by ANSYS FLUENT using the refrigerant R404A. They are used in an automotive air conditioning system and almost have the same geometrical parameters. The results indicated that for the same mass flow rate the overall heat transfer rate and average heat transfer coefficient of the shell-and-tube heat exchanger with continuous helical baffles (CH-STHX) are higher than that of the shell-and-tube heat exchanger (STHX) by 32.2% and 41.7%. The shell-side average heat transfer coefficient of the liquid refrigerant in the CH-STHX is about 3.5 times higher than that of the STHX. As the price of heat transfer enhancement

the shell-side pressure drop of the CH-STHX is extremely increasing to 11 times larger than that of the STHX. While the tube-side heat transfer coefficient and pressure drop of the CH-STHX almost keep the same with that of the STHX. And most importantly

the heat recovery efficiency increases from 0.21 to 0.29 for the CH-STHX

by 38.1%.

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