Numerical studies on flow and heat transfer in membrane helical-coil heat exchanger and membrane serpentine-tube heat exchanger

2011 ◽  
Vol 38 (9) ◽  
pp. 1189-1194 ◽  
Author(s):  
Zhenxing Zhao ◽  
Xiangyu Wang ◽  
Defu Che ◽  
Zidong Cao
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Helical Coil ◽  
Tube Heat Exchanger ◽  
Flow And Heat Transfer ◽  
Numerical Studies ◽  
Coil Heat Exchanger ◽  
Coil Heat

Numerical study on flow and heat transfer of high-pressure syngas in membrane helical-coil heat exchanger

2011 ◽  
Vol 7 (6) ◽  
pp. 848-855 ◽  
Author(s):  
Zhen Yang ◽  
Zhenxing Zhao ◽  
Yinhe Liu ◽  
Xiangyu Wang ◽  
Yongqiang Chang ◽  
...  
Keyword(s):  
Heat Transfer ◽  
High Pressure ◽  
Heat Exchanger ◽  
Numerical Study ◽  
Helical Coil ◽  
Flow And Heat Transfer ◽  
Coil Heat Exchanger ◽  
Coil Heat

scholarly journals Performance analyses of helical coil heat exchangers. The effect of external coil surface modification on heat exchanger effectiveness

2016 ◽  
Vol 37 (4) ◽  
pp. 137-159 ◽  
Author(s):  
Rafał Andrzejczyk ◽  
Tomasz Muszyński
Keyword(s):  
Heat Transfer ◽  
Surface Modification ◽  
Heat Exchanger ◽  
Heat Exchangers ◽  
Helical Structure ◽  
Nuclear Industry ◽  
Helical Coil ◽  
Tube Heat Exchanger ◽  
High Heat Transfer ◽  
Coil Heat

Abstract The shell and coil heat exchangers are commonly used in heating, ventilation, nuclear industry, process plant, heat recovery and air conditioning systems. This type of recuperators benefits from simple construction, the low value of pressure drops and high heat transfer. In helical coil, centrifugal force is acting on the moving fluid due to the curvature of the tube results in the development. It has been long recognized that the heat transfer in the helical tube is much better than in the straight ones because of the occurrence of secondary flow in planes normal to the main flow inside the helical structure. Helical tubes show good performance in heat transfer enhancement, while the uniform curvature of spiral structure is inconvenient in pipe installation in heat exchangers. Authors have presented their own construction of shell and tube heat exchanger with intensified heat transfer. The purpose of this article is to assess the influence of the surface modification over the performance coefficient and effectiveness. The experiments have been performed for the steady-state heat transfer. Experimental data points were gathered for both laminar and turbulent flow, both for co current- and countercurrent flow arrangement. To find optimal heat transfer intensification on the shell-side authors applied the number of transfer units analysis.

Investigation Heat Transfer Parameters for a Helical-Coil Heat Exchanger in a Two-Phase Medium

2019 ◽  
pp. 22-33 ◽  
Author(s):  
A.A. Aleksandrov ◽  
I.V. Barmin ◽  
S.K. Pavlov ◽  
V.V. Chugunkov
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Hydrocarbon Fuel ◽  
External Heat ◽  
Helical Coil ◽  
Two Phase ◽  
Phase Medium ◽  
Coil Heat Exchanger ◽  
Heat Exchanger Surface ◽  
Coil Heat

The paper focuses on hydrocarbon fuel cooling in launch vehicles, specifically considering experimental technique and results obtained during investigation of one of the primary heat exchanger parameters, that is, heat transfer coefficient of the heat exchanger surface. We present a model of efficient hydrocarbon fuel cooling by means of intensifying heat transfer on the external heat exchanger surface due to nitrogen sparging causing active motion in the liquid heat carrier. We obtained quantitative data regarding heat transfer on the external surface of a helical-coil heat exchanger located in a two-phase medium consisting of antifreeze and nitrogen, in the temperature range of 243--293 K. We derived a similarity equation for calculating heat transfer coefficient on the external heat exchanger surface, which is required to determine the heat exchanger surface area and to compute heat transfer from hydrocarbon fuel to the two-phase medium consisting of antifreeze and nitroge.

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