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International Journal of Fluid Mechanics Research
ESCI SJR: 0.206 SNIP: 0.446 CiteScore™: 0.5

ISSN Druckformat: 2152-5102
ISSN Online: 2152-5110

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International Journal of Fluid Mechanics Research

DOI: 10.1615/InterJFluidMechRes.v25.i4-6.180
pages 656-661

Heat Transfer and Pressure Drop Characteristics in an EHD-Enhanced Finned-Tube Gas-to-Gas Heat Exchanger

Michael M. Ohadi
Small and Smart Thermal Systems Laboratory, Center for Energy Environmental Engineering, Department of Mechanical Engineering, University of Maryland, College Park, Maryland 20742, USA
S. S. Li
Center for Environmental Energy Engineering (CEEE) Department of Mechanical Engineering, University of Maryland, College Park, MD 20742, USA
A. I. Ansari
Center for Environmental Energy Engineering, Department of Mechanical Engineering, University of Maryland, College Park, USA

ABSTRAKT

The potential of the electrohydrodynamic (EHD) enhancement technique when used in conjunction with finned tubes for compound heat transfer enhancement in a gas-to-gas heat exchanger was studied experimentally. Experiments included evaluation of heat transfer and pressure drop characteristics when the electric field was applied to the tube side of the heat exchanger, to the shell side, and simultaneously applied to the tube and shell sides. In each case heat transfer enhancements and pressure drop characteristics are reported as a function of the Reynolds number and electric field potential in the tube and shell sides. It is demonstrated that when used in conjunction with finned tubes, the EHD technique can result an impressive improvement in the performance of the heat exchanger particularly for situations where a low temperature difference between the two working fluids in the heat exchanger prevails.


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