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Performance analyses of helical coil heat exchangers. The effect of external coil surface modification on heat exchanger effectiveness
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 thetube results in the development. It has been long recognized that the heattransfer 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 heattransfer enhancement, while the uniform curvature of spiral structure is inconvenient in pipe installation in heat exchangers. Authors have presentedtheir 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.
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- Publication version
- Accepted or Published Version
- DOI:
- Digital Object Identifier (open in new tab) 10.1515/aoter-2016-0032
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Details
- Category:
- Articles
- Type:
- artykuły w czasopismach recenzowanych i innych wydawnictwach ciągłych
- Published in:
-
Archives of Thermodynamics
no. 37,
edition 4,
pages 137 - 159,
ISSN: 1231-0956 - Language:
- English
- Publication year:
- 2016
- Bibliographic description:
- Andrzejczyk R., Muszyński T.: Performance analyses of helical coil heat exchangers. The effect of external coil surface modification on heat exchanger effectiveness// Archives of Thermodynamics. -Vol. 37., iss. 4 (2016), s.137-159
- DOI:
- Digital Object Identifier (open in new tab) 10.1515/aoter-2016-0032
- Sources of funding:
-
- COST_FREE
- Verified by:
- Gdańsk University of Technology
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