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ISSN Online: 2377-424X

ISBN Print: 0-89116-909-1

International Heat Transfer Conference 9
August, 19-24, 1990 , Jerusalem, Israel

EXPERIMENTAL STUDY OF THE ENHANCEMENT OF CONDENSATION HEAT TRANSFER ON DOWNWARD-FACING HORIZONTAL SURFACES

Get access (open in a dialog) DOI: 10.1615/IHTC9.3770
pages 103-108

Sinopsis

Experiments were performed to study the effects of surface geometry and porous drainage strip on the condensation heat transfer performance of downward-facing submerged and vapor-space condensers to be used for immersion cooling modules for electronic components. A smooth surface and two finned surfaces with and without the porous drainage strip were tested for condensation of R-113 and methanol. For the submerged condenser, vapor space was formed under the condensing surface in the low-heat-flux regime, whereas rising bubbles impinged on the condensing surface in the high-heat-flux regime. For both the submerged and vapor-space condensers, significant heat transfer enhancement was provided by the finned surface with smaller fin spacing. For the vapor-space condenser and the submerged condenser operated in the low-heat-flux regime, further heat transfer enhancement was provided by use of the porous drainage strip fitted normal to the finned surface. The measured heat transfer coefficients for the latter cases agreed well with numerical predictions.