Contemporary Developments in the Thermal Design of Finned-Tube Heat Exchangers

The capability to utilize dry air cooling by which heat is directly rejected to the air atmosphere heat sink is one of the benefits of the supercritical carbon dioxide (sCO2) energy conversion cycle. For the selection and analysis of the heat exchanger options for dry air cooling applications for the sCO2 cycle, two leading forced air flow design approaches have been identified and analyzed for this application; an air cooler consisting of modular finned tube air coolers; and an air cooler consisting of modular compact diffusion-bonded heat exchangers. The commercially available modular finned tube air cooler is found to be more cost effective and is selected as the reference for dry air cooling.

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Prediction of heat transfer coefficient on the fin inside one-tube plate finned-tube heat exchangers

International Journal of Heat and Mass Transfer ◽

10.1016/j.ijheatmasstransfer.2005.01.035 ◽

2005 ◽

Vol 48 (13) ◽

pp. 2697-2707 ◽

Cited By ~ 24

Author(s):

Han-Taw Chen ◽

Jen-Pin Song ◽

Yi-Tong Wang

Keyword(s):

Heat Transfer ◽

Heat Transfer Coefficient ◽

Transfer Coefficient ◽

Heat Exchangers ◽

Finned Tube ◽

Tube Plate

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Heat Transfer Enhancement in Triangular Fin

Heat Transfer: Volume 2 ◽

10.1115/ht2008-56478 ◽

2008 ◽

Author(s):

H. Shokouhmand ◽

M. Moghaddami ◽

H. Jafari

Keyword(s):

Heat Transfer ◽

Heat Transfer Enhancement ◽

Heat Exchangers ◽

Industrial Applications ◽

Finned Tube ◽

Optimum Thickness ◽

Transfer Enhancement ◽

Constant Length ◽

Heat Rejection ◽

Triangular Fin

Fins are widely utilized in many industrial applications for example, fins are used in air cooled finned tube heat exchangers like car radiators, heat rejection devices, refrigeration systems and in condensing central heat exchangers. In this paper, heat transfer inside the fin system composed of a primary rectangular fin with a number of rectangular fins (secondary fins), which are attached on its surface, is modeled and analyzed numerically. The length of the secondary fins decreases linearly from the base of the primary fin to its tip. This modified triangular fin is a kind of improved tree fin networks. The effectiveness of the modified triangular fin is compared with the effectiveness of triangular fin which is calculated analytically. The results show that adding secondary fins increases the effectiveness of triangular fin significantly. Also, it is found that increasing the number of secondary fins in a constant length of primary fin will increase the effectiveness. In addition, by comparing the results it can be concluded that by shortening the length of the primary fin in modified triangular fin, the effectiveness will increase significantly to the contrary of the triangular fin, so smaller heat exchangers can be built by using the modified triangular fin. It is found that in a constant length of primary fin, there is an optimum thickness of secondary fins which maximize the effectiveness of the fin.

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Thermal design of multi-stream heat exchangers

Applied Thermal Engineering ◽

10.1016/s1359-4311(02)00074-1 ◽

2002 ◽

Vol 22 (14) ◽

pp. 1643-1660 ◽

Cited By ~ 37

Author(s):

M. Picón-Núñez ◽

G.T. Polley ◽

M. Medina-Flores

Keyword(s):

Heat Exchangers ◽

Thermal Design

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