Two-phase flow distribution in parallel flow mini/micro-channel heat exchangers for refrigeration and heat pump systems: A comprehensive review

2021 ◽  
pp. 117820
Author(s):  
Tong Xiong ◽  
Guoqiang Liu ◽  
Shenjie Huang ◽  
Gang Yan ◽  
Jianlin Yu
Keyword(s):  
Heat Pump ◽  
Heat Exchangers ◽  
Two Phase Flow ◽  
Flow Distribution ◽  
Parallel Flow ◽  
Phase Flow ◽  
Micro Channel ◽  
Two Phase ◽  
Comprehensive Review

Thermal analysis of micro‐channel heat exchangers with two‐phase flow using FEM

2005 ◽  
Vol 15 (1) ◽  
pp. 43-60 ◽  
Author(s):  
Pradeep Hegde ◽  
K.N. Seetharamu ◽  
G.A. Quadir ◽  
P.A. Aswathanarayana ◽  
M.Z. Abdullah ◽  
...  
Keyword(s):  
Thermal Analysis ◽  
Heat Exchangers ◽  
Two Phase Flow ◽  
Phase Flow ◽  
Micro Channel ◽  
Two Phase

The Influence of Header Design on Two-Phase Flow Distribution in Plate-Fin Heat Exchangers

2020 ◽  
Vol 13 (2) ◽  
Author(s):  
Zhe Zhang ◽  
Sunil Mehendale ◽  
Shengnan Lv ◽  
Hui Yuan ◽  
JinJin Tian
Keyword(s):  
Heat Exchanger ◽  
Water Flow ◽  
Heat Exchangers ◽  
Water Distribution ◽  
Single Phase ◽  
Two Phase Flow ◽  
Flow Distribution ◽  
Phase Flow ◽  
Single Phase Flow ◽  
Two Phase

Abstract Fluid flow maldistribution causes deterioration of heat transfer as well as pressure drop penalty in heat exchangers. A test bench was set up to investigate the effect of different header designs on air-water flow distribution in plate-fin heat exchangers (PFHX). Two-phase flow distribution was examined for air Reynolds numbers (ReG) of 28293542 and inlet qualities (x) of 46.3–64.0%. Two-phase flow distribution was seen to be more uneven in the heat exchanger in comparison with single-phase flow, the water distribution being more uneven than that of the air. For a fixed inlet quality, as the air flowrate was increased, the distribution of two-phase flow became increasingly nonuniform, showing a pattern similar to single-phase flow. Furthermore, the air distribution became more even, while the water flow became more unevenly distributed as the inlet quality increased. To mitigate the maldistribution, perforated plates were incorporated in the heat exchanger header. The improved headers significantly aided in distributing the two-phase flow more evenly. At ReG = 2829 and x = 46.3%, the heat exchanger effectiveness was expressed in terms of the unevenness in quality, Sx. The effectiveness decreased as the unevenness of the flow distribution was exacerbated, emphasizing the significance of uniform phase and flow distribution as a key element of heat exchanger design.

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