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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/18015
Title: Heat transfer augmentation by segmented tape inserts during condensation of R-22 inside a horizontal tube
Authors: Agrawal K.N.
Kumar R.
Lal S.N.
Varma H.K.
Published in: Proceedings of 2004 Winter Meeting - Technical and Symposium Papers, American Society of Heating, Refrigerating and Air-Conditioning Engineers
Abstract: The augmentation in heat transfer by twisted tape inserts has been studied for forced convection condensation of R-22 vapor inside a tube. The inserts are put in the entire length and in 1/4, 1/2, and 3/4 lengths of the test condenser. The pitch ratio, y, for the full-length tape and the segmented tapes is 5.9. The refrigerant flow rate, G, has been taken as 210, 237, 282, 327, and 372 kg/s-m2. The enhancement in heat transfer during condensation of R-22 has been attained up to 25% for the full-length twisted tape insert. However, in a certain range of refrigerant flow rates, the 1/2 segmented tape insert has outperformed the full-length tape. It is a general observation that all the twisted tape inserts are more effective at low refrigerant flow rates; however, the full-length twisted tape insert remains effective at the higher refrigerant flow rate as well.
Citation: Proceedings of 2004 Winter Meeting - Technical and Symposium Papers, American Society of Heating, Refrigerating and Air-Conditioning Engineers, (2004), 147- 154. Anaheim, CA
URI: http://repository.iitr.ac.in/handle/123456789/18015
Issue Date: 2004
Keywords: Condenser tubes
Cooling
Energy dissipation
Heat transfer
Parameter estimation
Turbulence
Two phase flow
Flow rate
Horizontal tubes
Pre-condensers
Test condensers
Condensation
Author Scopus IDs: 7102038358
55389796000
7203074890
7006817955
Author Affiliations: Agrawal, K.N., Mechanical Engineering Department, Indian Inst. of Technology Roorkee, Roorkee, India
Kumar, R., Mechanical Engineering Department, Indian Inst. of Technology Roorkee, Roorkee, India
Lal, S.N., Bhagalpur Engineering College, Bhagalpur, India
Varma, H.K., Ideal Institute of Technology, Ghaziabad, India
Corresponding Author: Agrawal, K.N.; Mechanical Engineering Department, Indian Inst. of Technology Roorkee, Roorkee, India
Appears in Collections:Conference Publications [ME]

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