Proposed Correlations for Laminar, Turbulent, and Transition Heat Transfer in Micro-fin Tubes with Different Inlet Configurations

2022 ◽  
pp. 101-105
Author(s):  
Afshin J. Ghajar
Keyword(s):  
Heat Transfer ◽  
Fin Tubes ◽  
Transition Heat

Evaporation Heat Transfer and Pressure Drop in Micro-Fin Tubes Before and After Tube Expansion

2005 ◽  
Vol 12 (1) ◽  
pp. 59-72 ◽  
Author(s):  
Yun Wook Hwang ◽  
Min Soo Kim ◽  
Yongchan Kim
Keyword(s):  
Heat Transfer ◽  
Pressure Drop ◽  
Evaporation Heat ◽  
Before And After ◽  
Evaporation Heat Transfer ◽  
Fin Tubes ◽  
Tube Expansion

Heat Transfer During Film Condensation of R-123 Vapour on Horizontal Integral-Fin Tubes

1996 ◽  
Vol 3 (2) ◽  
pp. 147-164 ◽  
Author(s):  
L. K. Sreepathi ◽  
S. L. Bapat ◽  
S. P. Sukhatme
Keyword(s):  
Heat Transfer ◽  
Film Condensation ◽  
Fin Tubes

Condensation heat transfer on pin-fin tubes: Effect of thermal conductivity and pin height

2013 ◽  
Vol 60 (1-2) ◽  
pp. 465-471 ◽  
Author(s):  
Hafiz Muhammad Ali ◽  
Adrian Briggs
Keyword(s):  
Heat Transfer ◽  
Thermal Conductivity ◽  
Condensation Heat Transfer ◽  
Pin Fin ◽  
Fin Tubes

Average Wall Radiative Heat Transfer Characteristic of Isothermal Radiative Medium in Inner Straight Fin Tubes

2021 ◽  
Author(s):  
Wenping Peng ◽  
Min Xu ◽  
Xiaoxia Ma ◽  
Xiulan Huai
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Coefficient ◽  
Transfer Coefficient ◽  
Radiative Heat Transfer ◽  
Calculation Method ◽  
Radiative Heat ◽  
Solid Surfaces ◽  
Design Calculation ◽  
Radiative Heat Transfer Coefficient ◽  
Fin Tubes

Abstract Wall radiative heat transfer in inner straight fin tubes is very complex considering the coupling of heat conduction in fins and radiative heat transfer of medium with solid surfaces, influenced by a number of factors such as fin parameters, radiative pro perties and run conditions. In this study, a simplified method is used.The average radiative heat transfer between radiative medium and solid surfaces is firstly studied by simulation with fins assumed having a constant temperature. Then an approximate correlation of this radiative heat transfer coefficient is proposed using the traditional radiative heat transfer calculation method with a view coefficient, having a error within 15%. A calculation method of average wall radiative heat transfer coefficient is further proposed by fin theory with an average temperature of fin surface used to consider the varying of the temperature along the fin when the conductivity of fins is finite. Using the predicting method proposed, a method for design calculation of fins in tubes to optimize wall radiative heat transfer is also given with three dimensionless numbers of p/n, 2H/D and nt/pD defined. Three cases of are analyzed in detail based on the design calculation method. It is verified that the radiative heat transfer could be enhanced twice by introducing fins. Under the same h0, conductivity and emissivity are two important factors to choose the material for fins.The micro-fins or the special treatments on the tube wall are a best choice for the fin material having a relatively small conductivity.

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