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Thermal Sciences 2004. Proceedings of the ASME - ZSIS International Thermal Science Seminar II
June, 13-16, 2004, Bled, Slovenia

DOI: 10.1615/ICHMT.2004.IntThermSciSemin


ISBN Print: 978-9-61913-930-1

Augmentation of Heat Transfer Coefficient using various Tube — Fin Combinations for Condenser Size and Cost Reduction

pages 993-999
DOI: 10.1615/ICHMT.2004.IntThermSciSemin.1270
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RÉSUMÉ

The heat rejection capacity of any Air-Conditioning system depends on efficient design of the condenser. Condenser is one of the major contributors to the cost of the entire unit. There is a scope for reducing the cost and the size of an Air-Conditioning Unit by redesigning the condenser with new fin and tube configurations.
The present work deals with the reduction in size and hence cost of a condenser used for 1.5 Ton Air-Conditioning System through enhancement of convective heat transfer coefficient. The paper includes theoretical calculations using LMTD approach for heat exchanger design and a comparison of experimental results, as well as percentage reduction in cost for various designs. Theoretical calculations for pressure drop in grooved tubes involve a lot of complex equations and human effort; hence, CFD technique is used to overcome these difficulties [1].
The performance, size and cost of all modified condensers is compared with the Plain tube and Plain fin i.e. a conventional condenser. It can be concluded from theoretical and experimental results that the Grooved Tube-Louvered Fin (GT/LF) condenser gives better performance than other tube-fin combinations. Hence, the GT/LF condenser is recommended for commercial use.

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