Heat transfer and pressure drop correlations for compact heat exchangers with multi-region louver fins

Li, Wei; Wang, Xialing

doi:10.1016/j.ijheatmasstransfer.2010.04.002

Cited by 51 publications

(20 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Li and Wang [17] analyzed the air-side thermal performance by using the effectiveness-NTU method. The characteristics of the heat transfer and pressure drop for heat exchangers with different geometry parameters were presented in terms of the Colburn-j factor and Fanning friction factor as a function of the Reynolds number.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of the Air-Side Thermal Hydraulic Performance of a Louvered-Fin and Flat-Tube Heat Exchanger at Low Reynolds Numbers

Erbay

Uğurlubilek

Altun

et al. 2016

Heat Transfer Engineering

View full text Add to dashboard Cite

In this study, the air-side heat transfer and fluid flow characteristics of a louvered-fin and flattube type heat exchanger used in the household refrigerators were investigated numerically.Louver angles of 20º, 24º, 28º, and 32º and fin pitches of 1.50, 2.00, and 2.50 mm were tested.To represent domestic refrigeration systems, the simulations were conducted for low Reynolds numbers, between 223 and 573. The results were evaluated using the volume goodness factor for the air side. The best performance was obtained with louver angle of 20˚ and fin pitch of 1.50 mm at Reynolds number of 229 over the investigated cases. It was demonstrated that Colburn jfactor, friction factor, Stanton number and volume goodness factor did not change linearly with respect to the parameters considered.

show abstract

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of the Air-Side Thermal Hydraulic Performance of a Louvered-Fin and Flat-Tube Heat Exchanger at Low Reynolds Numbers

Erbay

Uğurlubilek

Altun

et al. 2016

Heat Transfer Engineering

View full text Add to dashboard Cite

show abstract

“…Where, (A t = A f + A b ), A f and A b are the areas of the fin and base surface, respectively. η f denotes the fin efficiency and is calculated by the approximation method described by Li and Wang [30]. …”

Section: Heat Transfer Rate Considerationsmentioning

confidence: 99%

Heat transfer characteristics and entropy generation for wing-shaped-tubes with longitudinal external fins in cross-flow

2016

View full text Add to dashboard Cite

A numerical study is conducted to clarify heat transfer characteristics, effectiveness and entropy generation for a bundle of wingshaped-tubes attached to Longitudinal fins (LF) at downstream side. The air-side Re a ranged from 1.8 x 10 3 to 9.7 x 10 3 . The fin height (h f ) and fin thickness (δ) have been changed as: (2 mm ≤ h f ≤ 12 mm) and (1.5 mm ≤ δ ≤ 3.5 mm). The analysis of entropy generation is based on the principle of minimizing the rate of total entropy generation that includes the generation of entropy due to heat transfer and friction losses. The temperature field around the wing-shaped-tubes with (LF) is predicted using commercial CFD FLUENT 6.3.26 software package. Correlations of Nu a , St a , and Bejan number (Be), as well as the irreversibility distribution ratio (Φ) in terms of Re a and design parameters for the studied bundle are presented. Results indicated that, installing fins with heights from 2 to 12 mm results in an increase in Nu a from 11 to 36% comparing with that of wing-shaped tubes without fins (NOF). The highest and lowest values of effectiveness (ε) at every value of the considered Re a range are occurred at h f = 6 mm and (NOF), respectively. The wing-shaped-tubes heat exchanger with h f = 6 mm has the highest values of (ε), efficiency index (η) and area goodness factor (G a ) and also the lowest values of Φ and hence the best performance comparing with other arrangements. The minimum values of Φ are occurred at h f = 6 mm. (Be) decreases with increasing Re a for all studied h f . The heat transfer irreversibility predominates for (1800 ≤ Re a ≤ 4200) while the opposite is true for (6950 < Re a ≤ 9700). δ has negligible effect on Nu a and heat transfer irreversibility. Comparisons between the experimental and numerical results of the present study and those, previously, obtained for similar available studies showed good agreements.

show abstract

“…These authors reported that implementing simple and perforated dimples on the louvers enhance the heat transfer and flow efficiency significantly. In previous studies [19,20], the j factor and f factor have been utilized to characterize the heat transfer and pressure drop of simple louver fin banks.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical investigation of the heat transfer augmentation and pressure drop in simple, dimpled and perforated dimpled louver fin banks with an in-line or staggered arrangement

Sangtarash

Shokuhmand

2015

Applied Thermal Engineering

View full text Add to dashboard Cite

Heat transfer and pressure drop correlations for compact heat exchangers with multi-region louver fins

Cited by 51 publications

References 20 publications

Numerical Investigation of the Air-Side Thermal Hydraulic Performance of a Louvered-Fin and Flat-Tube Heat Exchanger at Low Reynolds Numbers

Numerical Investigation of the Air-Side Thermal Hydraulic Performance of a Louvered-Fin and Flat-Tube Heat Exchanger at Low Reynolds Numbers

Heat transfer characteristics and entropy generation for wing-shaped-tubes with longitudinal external fins in cross-flow

Experimental and numerical investigation of the heat transfer augmentation and pressure drop in simple, dimpled and perforated dimpled louver fin banks with an in-line or staggered arrangement

Contact Info

Product

Resources

About