Overall heat transfer coefficient of plate-fin heat exchanger during a mixed refrigerant cryogenic process in low quality

CAO Le; LIU Jinping; XU Xiongwen; LI Rixin

doi:10.11949/j.issn.0438-1157.20151177

您当前的位置：

首页 >

文章列表页 >

Overall heat transfer coefficient of plate-fin heat exchanger during a mixed refrigerant cryogenic process in low quality

更新时间：2025-12-10

- Overall heat transfer coefficient of plate-fin heat exchanger during a mixed refrigerant cryogenic process in low quality
- CIESC Journal Issue 4, Pages: 1277-1286(2016)
- 作者机构：
  
  1. 华南理工大学电力学院,广东,广州,510640
  2. 广东省能源高效清洁利用重点实验室,广东,广州,510640
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20151177
  CLC： B61+1
- Online First：05 April 2016，
  
  Published：05 April 2016
- 稿件说明：
移动端阅览
CAO Le, LIU Jinping, XU Xiongwen, et al. Overall heat transfer coefficient of plate-fin heat exchanger during a mixed refrigerant cryogenic process in low quality[J]. CIESC Journal, 2016, (4): 1277-1286.
DOI：

CAO Le, LIU Jinping, XU Xiongwen, et al. Overall heat transfer coefficient of plate-fin heat exchanger during a mixed refrigerant cryogenic process in low quality[J]. CIESC Journal, 2016, (4): 1277-1286. DOI： 10.11949/j.issn.0438-1157.20151177.

摘要

对于中小型天然气液化装置

板翅式换热器被广泛应用于回热换热。然而

目前对低干度混合工质在板翅式换热器中低温换热性能优化等问题的研究甚少。因此

搭建一套采用单级压缩、一级回热的Linde-Hampson制冷循环系统

并以N2-CH4-C2H4-C3H8-iC4H10作为混合制冷剂制取-160℃低温

用以重点分析板翅式换热器中的总传热系数以及影响板翅式换热器传热系数的因素。实验结果表明:低干度下板翅式换热器中总传热系数在2.6~22.7 W·m-2·K-1之间

受制冷温度和循环浓度变化的影响不明显

而目前对低干度低流速下混合制冷剂的低温换热性能预测仍存在一定的偏差

其中Cavallini和Modified Granryd的计算模型经修正后可推荐使用;同时

也从制冷剂流速、压降等方面对板翅式换热器优化设计提出了相关建议。

Abstract

Plate-fin heat exchangers (PFHEs) are mostly employed in medium- and small-sized LNG plants. However

works about the heat transfer characteristic optimization of mixed refrigerant in PFHE under low quality have been barely carried out nowadays. Thus

a Linde-Hampson cycle using single stage compressors and recuperative heat exchanger was established and mixed refrigerant (N2-CH4-C2H4-C3H8-iC4H10) was used to obtain the refrigeration temperature of -160℃. Meanwhile

the overall heat transfer coefficient and the correlational influence factor were mainly analysed. The experimental results showed that the overall heat transfer coefficient of the PFHE was about 2.6—22.7 W·m-2·K-1 while the refrigeration temperature and the circulated composition had week influence on the overall heat transfer coefficient. Meanwhile

the existing correlations cannot accurately predict the heat transfer coefficient of the mixed refrigerant under low quality and low flow velocity. However

the correlation of Cavallini and modified Granryd can used to predict the HTC of mixed refrigerant under low quality and low flow velocity after modification in this work. Additionally

some suggestion have been proposed in the design and optimization of PFHEs considering the refrigerate flowrate and pressure drop.

关键词

Keywords

references

Views

252

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Numerical simulation of coupled heat transfer for LNG pipeline

Analysis of temperature field of membrane liquid cargo in a LNG carrier

Numerical simulation for flow condensation of methanol in horizontal tube

Flow boiling heat transfer and pressure drop characteristics of R1234ze(E) in metal foam filled tubes

Simulation of heat transfer performance in the coolant side of a novel chiller for electric vehicles thermal management system

Related Author

HU Zhuohuan

HUANG Tianke

ZHANG Leyi

YANG Mo

HUANG Bo

HUANG Hao

WANG Wen

HE Longkun

Related Institution

School of Energy and Power Engineering, University of Shanghai for Science and Technology

School of Mechanical Engineering, Shanghai Jiao Tong University

Jiangnan Institute of Technology, Jiangnan Shipyard (Group) Co., Ltd.

Institute of Refrigeration and Cryogenics Engineering, Shanghai Jiao Tong University

Shanghai UFI Filter Co. Ltd.

⁰