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NAOSITE : Nagasaki University's Academic Output SITE > Faculty of Engineering > Bulletin > Reports of the Faculty of Engineering, Nagasaki University > Volume 19, No. 33 >


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Title: 温泉熱発電(油ポンプなしのねじ膨張機の湿り運転特性)
Other Titles: Power from a Thermal Spring(Characteristics of a small-size Screw Expander with Wet Working Medium)
Authors: 河部, 秀彦 / 栗須, 正登 / 児玉, 好雄 / 吉田, 孝男
Authors (alternative): Kawabe, Hidehiko / Kuritsu, Masato / Kodama, Yoshio / Yoshida, Takao
Issue Date: Aug-1989
Publisher: 長崎大学工学部 / Faculty of Engineering, Nagasaki University
Citation: 長崎大学工学部研究報告, 19(33), pp.1-6; 1989
Abstract: The performance characteristics of a small-size screw expander for energy conversion of hot springs are described in this report. Instead of lubrication oil, the test machine is fed high temperature oily working medium liquid for the lubricant. This idea is proposed in order to omit lubrication of pump. By feeding of the oily working medium liquid lubricant, the working fluids must be of low quality(dryness fraction). For the calculation of the wet expantion, we introduce the actual adiabatic expansion with thermophysical properties of the actual working medium. This expansion is the isentropic expansion in which the adiabatic exponent K is variable. The calculated values of this method gives fairly good agreement with the experimental results. In this paper, as the result of the calculation and experimentation, we report the performance characteristics of a small-size screw expander operated with a low (x = 0.6~1.0) quality actual working medium.
URI: http://hdl.handle.net/10069/24294
ISSN: 02860902
Type: Departmental Bulletin Paper
Text Version: publisher
Appears in Collections:Volume 19, No. 33

Citable URI : http://hdl.handle.net/10069/24294

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