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Indexed by:期刊论文

Date of Publication:2017-03-01

Journal:EDS Conference on Desalination for the Environment - Clean Water and Energy

Included Journals:SCIE、CPCI-S

Volume:69

Page Number:210-216

ISSN No.:1944-3994

Key Words:Pressure drop; Steam condensation; Horizontal tube; Desalination

Abstract:An experimental system was built up to measure the pressure drop of steam condensation flow in vacuum horizontal aluminium brass tubes, whose inner diameter is 18 mm and length is 2 m. The experiments were carried out at the saturation temperatures varying from 50 degrees C to 70 degrees C with mass flow rate changing between 2 and 11 kg/(m(2).s). The temperature differences between steam and cooling water are 3 degrees C, 5 degrees C and 7 degrees C, respectively. Pressure drop decreases along flow direction. Pressure drop increases with mass flow rate and vapor quality, decreases with saturation temperature. Temperature difference has less effect on pressure drop. The saturation temperature depression rises at first and remains at a constant level later with the increase of flow direction. Saturation temperature depression increases with mass flow rate and decreases with temperature difference and saturation temperature. Based on the experimental data, a correlation was proposed for calculating pressure drop of steam condensation flow in vacuum horizontal tube.