Air-side heat transfer characteristics of flat plate finned-tube heat exchangers with large fin pitches under frosting conditions

2010 ◽  
Vol 53 (13-14) ◽  
pp. 2655-2661 ◽  
Author(s):  
Mooyeon Lee ◽  
Yonghan Kim ◽  
Hosung Lee ◽  
Yongchan Kim
Keyword(s):  
Heat Transfer ◽  
Flat Plate ◽  
Heat Exchangers ◽  
Finned Tube ◽  
Heat Transfer Characteristics ◽  
Transfer Characteristics

Flow and Thermal Characteristics Analysis of Plate–Finned Tube and Annular–Finned Tube Heat Exchangers fo In–Line and Staggered Configurations

2020 ◽  
Vol 22 (4) ◽  
pp. 1407-1418
Author(s):  
Shadman Sakib ◽  
Abdullah Al-Faruk
Keyword(s):  
Heat Transfer ◽  
Flow Rate ◽  
Heat Exchangers ◽  
Air Flow ◽  
Thermal Characteristics ◽  
Finned Tube ◽  
Air Flow Rate ◽  
Heat Transfer Characteristics ◽  
Transfer Characteristics ◽  
Exit Temperature

AbstractAs the effective selection of fin can greatly enhance the performance of heat exchanger, heat transfer and pressure drop performance on the air-side of annular and rectangular finned tube heat exchangers were numerically investigated. Two types of tube arrangement (in-line and staggered alignment) were examined for 6 different air flow rate for both the heat exchangers using computational fluid dynamics software package ANSYS FLUENT. Renormalization group theory (RNG) based k-ε turbulence model was employed to handle the unsteady three-dimensional flow and the conjugate heat transfer characteristics. The exit temperature were determined from the simulated results and then the LMTD, heat transfer rate and air-side heat transfer coefficient were calculated. The numerical flow visualization results revealed few important aspects, such as, the development boundary layers between the fins, the formation of the horseshoe vortex system, and the local variations of the velocity and temperature on the fin geometries. The result shows that as the air flow rate increased the exit temperature decreased but the overall heat transfer increased. Staggered configuration shows higher heat transfer characteristics over the in-line configuration. The rectangular finned tube shows 17 to 24% improvement in heat transfer over the annular finned tube.

scholarly journals CFD analysis and heat transfer characteristics of finned tube heat exchangers

2019 ◽  
Vol 14 (3) ◽  
pp. 165-176 ◽  
Author(s):  
Máté Petrik ◽  
Gábor Szepesi ◽  
Károly Jármai
Keyword(s):  
Heat Transfer ◽  
Heat Exchangers ◽  
Finned Tube ◽  
Cfd Analysis ◽  
Heat Transfer Characteristics ◽  
Transfer Characteristics
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