Heat transfer augmentation in a plate-fin heat exchanger using a rectangular winglet

2010 ◽  
Vol 39 (8) ◽  
pp. 590-610 ◽  
Author(s):  
Munish Gupta ◽  
K.S. Kasana ◽  
R. Vasudevan
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Heat Transfer Augmentation

Nanofluid heat transfer augmentation in a double pipe heat exchanger

2020 ◽  
Author(s):  
Kafel Azeez ◽  
Ayad Fouad Hameed ◽  
Adnan M. Hussein
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Heat Transfer Augmentation ◽  
Double Pipe ◽  
Pipe Heat

Shell-and-Tube Side Heat Transfer Augmentation by the Use of Wall Radiation in a Crossflow Shell-and-Tube Heat Exchanger

1984 ◽  
Vol 106 (4) ◽  
pp. 735-742 ◽  
Author(s):  
Y. Yamada ◽  
M. Akai ◽  
Y. Mori
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Room Temperature ◽  
Heat Transfer Performance ◽  
Transfer Coefficients ◽  
Tube Heat Exchanger ◽  
Heat Transfer Coefficients ◽  
Heat Transfer Augmentation ◽  
Hot Gas ◽  
Shell And Tube

The heat transfer performance of a crossflow shell-and-tube heat exchanger for high-temperature use in which heat transfer is augmented by the use of wall radiation in both shell and tube sides, is studied. Radiation plates are inserted in the shell side, and twisted cross-tapes in the tube side. Overall heat transfer coefficients are measured to be about a maximum 80 percent larger than those without radiation, where the inlet temperatures of the hot gas range up to 800 °C, while those of the cold gas are about room temperature. Analytical results agree well with experimental results, and an approximate calculation procedure is found to be simple and accurate enough for practical use.

Heat Transfer Augmentation in Heat Exchanger by using Nanofluids and Vibration Excitation - A Review

2020 ◽  
Vol 17 (1) ◽  
pp. 7719-7733
Author(s):  
N. F. D. Razak ◽  
M. S. M. Sani ◽  
W. H. Azmi
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
High Frequency ◽  
Heat Transfer Performance ◽  
Transfer Performance ◽  
High Frequency Vibration ◽  
Heat Transfer Augmentation ◽  
Vibration Excitation ◽  
Efficient Heat Transfer ◽  
Fouling Reduction

Nanofluids are used in heat exchanger system as efficient heat transfer fluids to improve heat transfer performance by passive method. Besides, another special active technique by implementing the low or high frequency vibration, which was used in heat exchanger to enhance the heat transfer performance. This paper reviews the heat transfer augmentation in heat exchanger by using nanofluids, vibration excitation of low and high frequency vibration. The use of nanofluids in heat exchanger system can provide better effective thermal conductivity compared to the conventional coolants. The presence of nanosize particles in nanofluids performed better mixing flow with higher thermal properties compared to pure fluids. Additionally, the active method by inducing low and high frequency vibration technology was applied in heat exchanger system. The heat transfer augmentation by vibration excitation was resulted from the mitigation of the fouling resistance on the surface of the tube wall. It was found that vibration excitation not only increase the heat transfer rate, but also might be a solution for fouling reduction. Hence, there is a great potential of using nanofluids together with vibration excitation simultaneously in heat exchanger system to improve the heat transfer performance.

scholarly journals Numerical Analysis for Heat Transfer Augmentation in a Circular Tube Heat Exchanger Using a Triangular Perforated Y-Shaped Insert

Fluids ◽  
2021 ◽  
Vol 6 (7) ◽  
pp. 247
Author(s):  
Lokesh Pandey ◽  
Satyendra Singh
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Friction Factor ◽  
Circular Tube ◽  
Tube Wall ◽  
Constant Heat Flux ◽  
Working Fluid ◽  
Tube Heat Exchanger ◽  
Heat Transfer Augmentation ◽  
Plain Tube

The present investigation constitutes CFD analysis of the heat transmission phenomenon in a tube heat exchanger with a Y-shaped insert with triangular perforation. The analysis is accomplished by considering air as a working fluid with a Reynolds number ranging from 3000 to 21,000. The segment considered for analysis consists of a circular tube of 68 mm diameter and 1.5 m length. The geometrical parameter considered is the perforation index (0%, 10%, 20%, and 30%). The constant heat flux is provided at the tube wall and a pressure-based solver is used for the solution. The studies are performed for analyzing the effects of inserts on the heat transfer and friction factor in the circular tube heat exchanger which results in augmented heat transfer at a higher perforation index (PI) and lower friction factor. The investigation results show that the highest heat transfer is 5.84 times over a simple plain tube and the maximum thermal performance factor (TPF) is 3.25 at PI = 30%, Re = 3000.

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