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International Heat Transfer Conference 15

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

Steam Flow Condensation in Semi-Circular and Square Mini-Channels

Melanie M. Derby
Mechanical and Nuclear Engineering Kansas State University 3002 Rathbone Hall Manhattan, KS 66506

Yoav Peles
Rensselaer Polytechnic Institute, 110, 8th Street, Troy NY, 12180-3590; University of Central Florida Department of Mechanical and Aerospace Engineering Pegasus Blvd., P.O. Box 162450, Orlando, FL 32816-245012760, USA

Michael K. Jensen
Center for Multiphase Flow, Rensselaer Polytechnic Institute, Troy, NY, USA; University of Wisconsin-Milwaukee, Mechanical Engineering Department Milwaukee, Wisconsin 53201

DOI: 10.1615/IHTC15.cds.008873
pages 686-697

KEY WORDS: Condensation, Two-phase/Multiphase flow, minichannel, mini-channel, shape effects, microchannel


This study examines the effects of channel shape on condensation of steam, a high surface tension fluid. Condensation heat transfer coefficients were measured in 1-mm hydraulic channels square and semi-circular channels for a range of qualities (0.08 < x < 0.9) and mass fluxes (75 < G < 200 kg/m2s). Heat transfer coefficients increased with increasing quality, and few effects of shear forces were noted in this mass flux range. Over the range of tested conditions, the hannels did not experience substantial surface tension enhancement. The data were compared to previous work with refrigerants, and the trends are discussed.

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