Thermal performance assessment in a fin-and-oval-tube heat exchanger with delta winglet vortex generators

2015 ◽  
Vol 29 (4) ◽  
pp. 1765-1779 ◽  
Author(s):  
Withada Jedsadaratanachai ◽  
Amnart Boonloi
Keyword(s):  
Heat Exchanger ◽  
Performance Assessment ◽  
Thermal Performance ◽  
Vortex Generators ◽  
Tube Heat Exchanger ◽  
Delta Winglet ◽  
Oval Tube

scholarly journals Comparison of Different Fin and Tube Compact Heat Exchanger with Longitudinal Vortex Generator in CFU-CFD Configurations

2021 ◽  
Vol 39 (5) ◽  
pp. 1523-1531
Author(s):  
Katherine Barquín ◽  
Alvaro Valencia
Keyword(s):  
Heat Exchanger ◽  
Vortex Generator ◽  
Hydraulic Performance ◽  
Vortex Generators ◽  
Longitudinal Vortex ◽  
Tube Heat Exchanger ◽  
Tube Arrangement ◽  
First Case ◽  
Delta Winglet ◽  
Oval Tube

Over the last decades several studies have searched for improved Fin and Tube Heat Exchanger (FTHE) designs capable of providing the best thermo-hydraulic performance. The present study aims at quantifying and comparing the thermo-hydraulic performance of different FTHE configurations. Six different designs were analyzed. The first FTHE consisted of an in-line circular tube arrangement and the last one was a FTHE with staggered oval tube with two pairs of Delta Winglet Vortex Generators (DWVG) in common flow up–common flow down (CFU-CFD) configuration. The best performance was obtained using DWVG in CFU-CFD orientation. This configuration enabled a 90% increase of the thermal performance factor when compared with the first case, using only two pairs of vortex generator´s per tube.

CFD analysis of fin tube heat exchanger with a pair of delta winglet vortex generators

2012 ◽  
Vol 26 (9) ◽  
pp. 2949-2958 ◽  
Author(s):  
Seong Won Hwang ◽  
Dong Hwan Kim ◽  
June Kee Min ◽  
Ji Hwan Jeong
Keyword(s):  
Heat Exchanger ◽  
Vortex Generators ◽  
Cfd Analysis ◽  
Tube Heat Exchanger ◽  
Delta Winglet ◽  
Fin Tube

scholarly journals 3D Simulative Investigation of Heat Transfer Enhancement Using Three Vortex Generator Types Surrounding Tube in Plate Fin Heat Exchanger

2019 ◽  
Vol 130 ◽  
pp. 01027
Author(s):  
Stefan Mardikus ◽  
Petrus Setyo Prabowo ◽  
Vinsensius Tiara Putra ◽  
Made Wicaksana Ekaputra ◽  
Juris Burlakovs
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Pressure Drop ◽  
Vortex Generator ◽  
Vortex Generators ◽  
Pair Type ◽  
Tube Heat Exchanger ◽  
Performance Of Heat Transfer ◽  
Delta Winglet ◽  
The Heat Transfer Coefficient

Vortex generator is a method to enhancing of heat exchanger performance but still have some disadvantages when the heat transfer performance increase. One of the disadvantage using vortex generator is high pressure drop. This investigation will be compared three type vortex generators to result the overall performance of heat transfer around tube in plate fin heat exchanger. The three types of vortex generator to investigate are rectangular winglet type, delta winglet type, and trapezoidal winglet type in laminar flow. The result showed that using the kind of trapezoidal winglet pair type in the plate fin and tube heat exchanger consist of six rows of round tube with two neighboring fins form a channel better performance than two types vortex generators such as rectangular winglet type and delta winglet type. The heat transfer coefficient when use trapezoidal winglet type was increased almost same with rectangular winglet type and pressure drop was decreased more than delta winglet type.

scholarly journals Efek Sudut Serang Concave Delta Winglet Vortex Generators Terhadap Kenaikan Laju Perpindahan Panas Di Dalam Aliran Fluida

ROTASI ◽  
2018 ◽  
Vol 20 (2) ◽  
pp. 124
Author(s):  
Syaiful Syaiful ◽  
MSK Tony Suryo Utomo ◽  
Hengky Dwi Febriandy
Keyword(s):  
Heat Exchanger ◽  
Vortex Generator ◽  
Vortex Generators ◽  
Tube Heat Exchanger ◽  
Delta Winglet

Fin and tube heat exchanger adalah salah satu penukar kalor compact yang digunakan dalam berbagai aplikasi, seperti pada industri petroleum, industri kimia, industri HVAC dan indistri otomotif. Oleh karena itu peningkatan performa termal pada heat exchanger perlu untuk dilakukan. Salah satu cara untuk meningkatkan performa termal pada heat exchanger adalah dengan meningkatkan koefisien perpindahan panas konveksi pada fluida. Pada studi sekarang ini, eksperimen dilakukan untuk mengetahui beberapa parameter yang mempengaruhi perbaikan perpindahan panas. Eksperimental dilakukan dengan memasang vortex generators pada sudut serang 15, 30 dan 45 dengan susunan satu, dua dan tiga baris di dalam saluran persegi empat. Pada eksperimen ini, concave delta winglet vortex generators (CDW VGs) dan tanpa vortex generator (baseline) diinvestigasi. Kecepatan udara masuk ke dalam saluran persegi empat ditentukan pada rentang 0.4-2.0 m/s dengan interval 0.2 m/s dengan laju panas konstan 35 W pada plat dimana vortex generators ditempelkan. Pada kasus tiga baris DWP VG dengan sudut serang 45̊, koefisien perpindahan panas konveksi rata-rata meningkat 1,68 kali lebih besar daripada baseline. Sedangkan pada kasus tiga baris CDWP VGs dengan sudut serang 45̊, koefisien perpindahan panas konveksi rata-rata meningkat 1,76 kali lebih besar daripada tiga baris DWP VG.

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