Experimental investigation of the flow and heat transfer performance in micro-channel heat exchangers with cavities

2020 ◽  
Vol 159 ◽  
pp. 120075
Author(s):  
Binghuan Huang ◽  
Haiwang Li ◽  
Shuangzhi Xia ◽  
Tiantong Xu
Keyword(s):  
Heat Transfer ◽  
Experimental Investigation ◽  
Heat Exchangers ◽  
Heat Transfer Performance ◽  
Transfer Performance ◽  
Micro Channel ◽  
Flow And Heat Transfer

The Curvature Effect on the Heat Transfer at the End of a Bayonet Tube With Laminar Flows

2004 ◽  
Author(s):  
F. Sun ◽  
H. Li ◽  
J. Drummond ◽  
G.-X. Wang
Keyword(s):  
Heat Transfer ◽  
Heat Exchangers ◽  
Average Nusselt Number ◽  
Heat Transfer Performance ◽  
Laminar Flows ◽  
Transfer Performance ◽  
Curvature Effect ◽  
Flow And Heat Transfer ◽  
Cooling Agent ◽  
Annular Section

Bayonet tubes, simple refluent heat exchangers, are widely used to heat or cool a media when the heating/cooling agent is readily accessible from one side only. Many studies have been conducted to evaluate the heat transfer performance of bayonet tubes. The majority of these studies focus on the heat transfer in the annular section and little on the end surface. This paper presents a numerical simulation of the laminar flow and heat transfer in a bayonet tube. The simulation is first validated by the experimental data in the literature. The flow and heat transfer in bayonet tubes are then investigated with both flat and curved end surfaces. Both local and average Nusselt number on the end surfaces are calculated under various Re and geometry conditions. Effect of the end surface curvature is studied by comparing the performances of the flat and curved ended bayonet tubes.

State of the art on flow and heat transfer performance of compact fin-and-tube heat exchangers

2019 ◽  
Vol 139 (4) ◽  
pp. 2739-2768 ◽  
Author(s):  
A. Y. Adam ◽  
A. N. Oumer ◽  
G. Najafi ◽  
M. Ishak ◽  
M. Firdaus ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Heat Exchangers ◽  
Heat Transfer Performance ◽  
State Of The Art ◽  
Transfer Performance ◽  
Flow And Heat Transfer

Experimental Investigation on the Flow and Heat Transfer of an Air-Air Primary Surface Heat Exchanger

2018 ◽  
Author(s):  
Wei Dong ◽  
Shengbao Zhang ◽  
Zhiqiang Guo ◽  
Xiao Yu
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Heat Exchangers ◽  
Heat Transfer Performance ◽  
Surface Heat ◽  
Transfer Performance ◽  
Test Results ◽  
Flow And Heat Transfer ◽  
The Cross ◽  
Surface Heat Exchanger

The primary surface heat exchanger (PSHE) is a kind of small size, light weight, high integration heat exchanger. The characteristics of the complex internal structure, complex flow pattern and the flow interaction have a great influence on the heat transfer of the air-air primary surface heat exchanger. Five cross-corrugated air-air primary surface heat exchangers with different core configurations are designed and fabricated applying additive manufacturing technology. The cross angle θ of upper and lower corrugated plates is 0°, 15°, 30°, 45°, respectively. An experimental investigation on the flow and heat transfer performance is carried out. The comparison of test results of overall heat transfer coefficient and the pressure drop for different primary heat exchangers is presented. The test results show that the pressure drop is significantly increased with the cross angle increasing, and the heat transfer performance does not show the linear increasing with the cross angle increasing.

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