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ACRC Technical Report 214PDF


Title:A Study of the Application of Vortex Generators to Enhance the Air-Side Performance of Heat Exchangers
Author(s):Bull, B.R.; Jacobi, A.M.
Subject(s):vortex generators
air-side thermal performance
Abstract:The effect of longitudinal vortex generation on heat transfer is evaluated for a full scale plain fin-and-tube compact heat exchanger operating in both dry and wet conditions. The heat exchanger tested is comparable to an evaporator in a residential air-conditioning system. For this study the baseline performance of the heat exchanger is determined then the heat exchanger is modified with the addition of 2100 delta-wing vortex generators. The performance is determined by a volume goodness factor for the dry operating conditions and the overall enthalpy transfer coefficient for wet operating conditions. A 10% improvement in the volume goodness factor was recorded for the dry tests and the wet tests showed an overall reduction in the overall enthalpy transfer coefficient. A comparison was then made using j and f correlations for other enhanced surfaces. From these tests the j/f value for the vortex generator enhanced surface is shown to be comparable to the other enhanced surfaces.
Issue Date:2003-05
Publisher:Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign.
Series/Report:Air Conditioning and Refrigeration Center TR-214
Genre:Technical Report
Sponsor:Air Conditioning and Refrigeration Project 121
Date Available in IDEALS:2009-06-12

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