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第43号 >

Please use this identifier to cite or link to this item: http://hdl.handle.net/11178/4699

Title: 水平細管内の流動と沸騰熱伝達に関する研究(機械工学科)
Other Titles: Investigation on Boiling Heat Transfer and Pressure Drop in a Horizontal Small Tube(DEPARTMENT OF MECHANICAL ENGINEERING)
Authors: 筒井, 正幸
中山, 昭男
TSUTSUI, Masayuki
ツツイ, マサユキ
ナカヤマ, アキオ
九州産業大学工学部機械工学科 / 九州産業大学工学部機械工学科
Keywords: Flow boiling
Heat transfer
Pressure drop
Small tube
Issue Date: Dec-2006
Publisher: 九州産業大学工学部
Abstract: Heat transfer coefficient and pressure drop for refrigerants R-123 are measured in horizontal small tube. The stainless steel tube of 1.1mm inside diameter, 305mm heated length is used for the test section. As ranges of the main experimental parameters, heat fluxes are 0.5-33kW/m^2; mass velocities 110-3400kg/m^2s; and inlet temperatures 18-30℃. The experimental result presented that the boiling heat transfer coefficients are between 3 and 12 times as large as the single convective heat transfer coefficient. It is also presented that the two-phase frictional pressure drop could be predicted by following relation within ±20%. ΔP_F/ΔP_<Vo>=1.68x^<1.10>_<exit> Where, ΔP_<Vo> is pressure drop for the total flow of fluid having the vapor properties at test section exit.
URI: http://hdl.handle.net/11178/4699
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