Fluid flow and heat transfer in an air-to-water double-pipe heat exchanger

2015 ◽  
Vol 130 (11) ◽  
Author(s):  
M. Sheikholeslami ◽  
M. Gorji-Bandpy ◽  
D. D. Ganji
Keyword(s):  
Heat Transfer ◽  
Fluid Flow ◽  
Heat Exchanger ◽  
Flow And Heat Transfer ◽  
Double Pipe ◽  
Pipe Heat

An experimental study on MWCNT–water nanofluids flow and heat transfer in double-pipe heat exchanger using porous media

2019 ◽  
Vol 137 (5) ◽  
pp. 1797-1807 ◽  
Author(s):  
Ahmad Moradi ◽  
Davood Toghraie ◽  
Amir Homayoon Meghdadi Isfahani ◽  
Ali Hosseinian
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Porous Media ◽  
Heat Exchanger ◽  
Flow And Heat Transfer ◽  
Double Pipe ◽  
Pipe Heat

Investigation of turbulent flow and heat transfer in an air to water double-pipe heat exchanger

2014 ◽  
Vol 26 (4) ◽  
pp. 941-947 ◽  
Author(s):  
Mohsen Sheikholeslami ◽  
M. Jafaryar ◽  
F. Farkhadnia ◽  
Mofid Gorji-Bandpy ◽  
Davood Domiri Ganji
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Turbulent Flow ◽  
Flow And Heat Transfer ◽  
Double Pipe ◽  
Pipe Heat

scholarly journals Improving thermal performance using Al2O3-water nanofluid in a double pipe heat exchanger filling with porous medium

2020 ◽  
Vol 24 (6 Part B) ◽  
pp. 4267-4275
Author(s):  
Qusay Jasim ◽  
Noah Saleh ◽  
Adnan Hussein
Keyword(s):  
Heat Transfer ◽  
Porous Media ◽  
Fluid Flow ◽  
Heat Exchanger ◽  
Volume Flow ◽  
Inlet Temperature ◽  
Flow Rates ◽  
Inside Diameter ◽  
Double Pipe ◽  
Pipe Heat

A double pipe heat exchanger is significant device for many industrial applications. In this paper, an experimental study using both porous media and nanofluid to enhance heat transfer in a double pipe heat exchanger is performed. The test rig has been fabricated with inner copper pipe of 1.10 m length, 16 mm, and 14 mm outside and inside diameter, respectively. While, the outer PVC pipe is 1 m length, 31 mm, and 27 mm outside and inside diameter, respectively. The inner pipe has been filling with 3 mm diameters of steel balls porous media. The experimental tests were performed utilizing alumina nanofluid (Al2O3-water) with two volume concentrations 0.5% and 1%. The volume flow-rates are in the range of (2-5) Lpm and 10 Lpm through inner and outer pipe, respectively. It was conducted with a constant 28?C inlet temperature of cold fluid-flow inside the inner pipe and 50?C inlet temperature of hot fluid-flow inside the outer pipe. Results indicated that the heat transfer enhanced as nanofluid volume concentrations and volume flow-rates increase. It was observed that effectiveness increases as increase of flow-rate and nanofluid concentrations.

Numerical Investigation on Conjugate Heat Transfer of Supercritical CO2 in a Horizontal Double-Pipe Heat Exchanger

2017 ◽  
Author(s):  
Zhenxing Zhao ◽  
Jun Wu ◽  
Yuansheng Lin ◽  
Qi Xiao ◽  
Fan Bai ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Supercritical Fluid ◽  
Supercritical Co2 ◽  
Conjugate Heat Transfer ◽  
High Mass ◽  
Heat Transfer Deterioration ◽  
Flow And Heat Transfer ◽  
Double Pipe ◽  
Pipe Heat

The special fluid flow and heat transfer characteristics of supercritical CO2 in a horizontal double-pipe heat exchanger have been numerically investigated. The AKN k-epsilon model was selected to model the turbulent flow and heat transfer of supercritical fluid. In conjugate heat transfer process, there exists obvious heat transfer deterioration on the top wall for horizontal flow. The region of heat transfer deterioration expands with the increased GShell or TShell,0, and the influence of TShell,0 on conjugate heat transfer is greater than that of GShell. The high-temperature fluid will gather near the top region. The intensity and position of the secondary flow can represent the turbulence heat transfer. When the supercritical fluid temperature is much higher than Tpc, buoyancy force can be omitted, but it can not been neglected even under relatively high mass flux.

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