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Indexed by:会议论文

Date of Publication:2009-12-18

Included Journals:EI、CPCI-S

Volume:2

Page Number:103-110

Key Words:Condensation; Microchannel; Heat transfer; Pressure drop; Steam quality

Abstract:Experiment was conducted to study steam condensation in horizontal microchannel etched on silicon wafer and bonded by a Pyrex glass plate from the top. The trapezoidal microchannel had a top width of 7943.11 mu m and depth of 81.77 mu m with hydraulic diameter of 161.49 mu m. The experiments were performed at different steam mass fluxes ranged from 128 kg m(-2) s(-1) to 320 kg m(-2) s(-1), while the inlet temperature of cooling water was fixed at 30 degrees C or 50 degrees C. Characteristics of condensation heat transfer and pressure drop in microchannels were measured and discussed. The temperature of Pyrex glass and local steam quality were also tested. It is found that the heat transfer flux, heat transfer coefficient and pressure drop depend greatly on steam mass flux and cooling water temperature.