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International Heat Transfer Conference 13

ISBN Imprimir: 1-56700-226-9 (CD)
ISBN En Línea: 1-56700-225-0

AN EXPERIMENTAL INVESTIGATION OF POOL BOILING FOR WATER WITH COPPER FOAM METAL AT LOW VACUUM PRESSURE

DOI: 10.1615/IHTC13.p28.540
page 7

Bidyut Baran Saha
International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan; Kyushu University Program for Leading Graduate School, Green Asia Education Center Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga-koen 6-1 Kasuga-shi, Fukuoka 816-8580, Japan; Mechanical Engineering Department, Kyushu University 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan

Kim Choon Ng
Department of Mechanical Engineering, National University of Singapore; Water Desalination and Reuse Center, 4700 King Abdullah, University of Science and Technology (KAUST), Twuwal 23955-6900

M. A. Sai
National University of Singapore, Singapore

Anutosh Chakraborty
Kyushu University, Kasuga-shi, Fukuoka, Japan

Shigeru Koyama
International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan; Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga-koen 6-1, Kasuga-shi, Fukuoka 816-8580, Japan

Sinopsis

The pool boiling heat transfer of water has been investigated extensively by many scientists and researchers and the range of pressures of experiments spanning from atmospheric to near critical pressures. There is a dearth of pool boiling data for micro cooling applications particularly when the vapour pressures are less than 4 kPa and saturation temperatures are below the ambient. In this paper, the authors investigate the pool boiling of water in an evaporator where uniform heat fluxes are introduced by a radiantly-heated kaleidoscope, maximizing the high density boiling pattern across a specially designed foam-metal surface. The evaporator pressure is about 1.8 kPa, corresponding to water boiling temperatures of around 16°C. Other factors such as the ratio of wetted surface to base area have also been investigated. The results show that high boiling fluxes could be achieved with substantially lower overall temperature difference between the foam-metal and the saturation temperature. The measured data compared well with the available experimental data found in the literature, and a new modified correlation for pool boiling at low sub-atmospheric pressure is proposed.

IHTC-13 Digital Library

Measurement of fluid temperature with an arrangement of three thermocouples FLOW BOILING OF A HIGHLY VISCOUS POLYMER SOLUTION