Numerical analysis on the effect of baffle inclination angle on flow and heat transfer characteristic of shell and tube heat exchanger with helical baffle

2016 ◽  
pp. 457-463
Author(s):  
Unnat Prajapati ◽  
Absar Lakdawala
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Numerical Analysis ◽  
Inclination Angle ◽  
Heat Transfer Characteristic ◽  
Transfer Characteristic ◽  
Tube Heat Exchanger ◽  
Flow And Heat Transfer ◽  
Helical Baffle ◽  
Shell And Tube

Improving shell and tube heat exchanger thermohydraulic performance using combined baffle

2019 ◽  
Vol 30 (8) ◽  
pp. 4119-4140 ◽  
Author(s):  
Ali Akbar Abbasian Arani ◽  
Hamed Uosofvand
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Pressure Drop ◽  
Fluid Dynamic ◽  
Flow Simulation ◽  
Content Type ◽  
Tube Heat Exchanger ◽  
Flow And Heat Transfer ◽  
Helical Baffle ◽  
Shell And Tube

Purpose This paper aims to investigate the fluid flow and heat transfer of a laboratory shell and tube heat exchanger that are analyzed using computational fluid dynamic approach by SOLIDWORKS flow simulation (ver. 2015) software. Design/methodology/approach In this study, several types of baffle including segmental baffle, butterfly baffle, helical baffle, combined helical-segmental baffle, combined helical-disk baffle and combined helical-butterfly baffle are examined. Two important parameters as the heat transfer and pressure drop are evaluated and analyzed. Based on obtained results, segmental baffle has the highest amount of heat transfer and pressure drop. To assess the integrative performance, performance coefficient defines as “Q/Δp” is used. Findings This investigation showed that among the presented baffle types, the heat exchangers equipped with disk baffle has the highest heat transfer. In addition, in the same mass flow rate, the performance coefficient of the shell and tube heat exchanger equipped with helical-butterfly baffle is the highest among the proposed models. Originality/value After combined helical-butterfly baffle the butterfly baffle, disk baffle, helical-segmental baffle and helical-disk baffle show their superiority of 35.12, 25, 22 and 12 per cent rather than the common segmental baffle, respectively. Furthermore, except for the combined helical-disk baffle, the other type of combined baffle have better performance compare to the basic configuration (butterfly and segmental baffle).

A numerical investigation on LNG flow and heat transfer characteristic in heat exchanger

2014 ◽  
Vol 68 ◽  
pp. 110-118 ◽  
Author(s):  
Handry Afrianto ◽  
Md. Riyad Tanshen ◽  
B. Munkhbayar ◽  
U. Tony Suryo ◽  
Hanshik Chung ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Numerical Investigation ◽  
Heat Transfer Characteristic ◽  
Transfer Characteristic ◽  
Flow And Heat Transfer

A Fully Wet and Fully Dry Tiny Circular Fin Method for Heat and Mass Transfer Characteristics for Plain Fin-and-Tube Heat Exchangers Under Dehumidifying Conditions

2006 ◽  
Vol 129 (9) ◽  
pp. 1256-1267 ◽  
Author(s):  
Worachest Pirompugd ◽  
Chi-Chuan Wang ◽  
Somchai Wongwises
Keyword(s):  
Heat Transfer ◽  
Mass Transfer ◽  
Heat Exchanger ◽  
Heat And Mass Transfer ◽  
Heat Exchangers ◽  
Heat Transfer Characteristic ◽  
Transfer Characteristic ◽  
Tube Heat Exchanger ◽  
Mass Transfer Characteristic ◽  
Transfer Characteristics

This study proposes a new method, namely the “fully wet and fully dry tiny circular fin method,” for analyzing the heat and mass transfer characteristics of plain fin-and-tube heat exchangers under dehumidifying conditions. The present method is developed from the tube-by-tube method proposed in the previous study by the same authors. The analysis of the fin-and-tube heat exchangers is carried out by dividing the heat exchanger into many tiny segments. A tiny segment will be assumed with fully wet or fully dry conditions. This method is capable of handling the plain fin-and-tube heat exchanger under fully wet and partially wet conditions. The heat and mass transfer characteristics are presented in dimensionless terms. The ratio of the heat transfer characteristic to mass transfer characteristic is also studied. Based on the reduced results, it is found that the heat transfer and mass transfer characteristics are insensitive to changes in fin spacing. The influence of the inlet relative humidity on the heat transfer characteristic is rather small. For one and two row configurations, a considerable increase of the mass transfer characteristic is encountered when partially wet conditions take place. The heat transfer characteristic is about the same in fully wet and partially wet conditions provided that the number of tube rows is equal to or greater than four. Correlations are proposed to describe the heat and mass characteristics for the present plain fin configuration.

scholarly journals Numerical Study on the Effect of Tube Rows on the Heat Transfer Characteristic of Dimpled Fin

2014 ◽  
Vol 6 ◽  
pp. 637052 ◽  
Author(s):  
Xuehong Wu ◽  
Lihua Feng ◽  
Dandan Liu ◽  
Hao Meng ◽  
Yanli Lu
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Heat Transfer Characteristic ◽  
Average Nusselt Number ◽  
Heat Transfer Performance ◽  
Numerical Study ◽  
Transfer Characteristic ◽  
Transfer Performance ◽  
Heat Transfer Characteristics ◽  
Tube Heat Exchanger

The dimpled fin has excellent heat transfer performance and has attracted a lot of attention to apply on the fin and tube heat exchanger. A study presents to investigate the effects of number of tube rows on the air-side heat transfer characteristics of dimpled fin for velocity ranging from 1 to 3 m/s. The Q/Δ P and Q/((Δ P × V)) are used to evaluate the heat transfer performance of the heat exchanger. The results show that the dimpled arrangement can change the mainstream direction, increase the disturbance, and enhance the heat transfer. With the increase of the number of tube rows, the average Nusselt number decreases and Q/Δ P and Q/((Δ P × V)) increase gradually. Compared with the multipipe tube rows, the performance of two-row tube is better.

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