チャギング蒸気凝縮に及ぼす管出口形状の影響

概要

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Pressure vessel of heat power plant has a vent tube or vapor condensation tube not to make over pressure in case of over power operation. Under certain condition, the vapor condensation pressure in the water pool may lead overpressurization and subsequent construction damage. This paper presents an experimental result on the condensation-induced pressure wave in single vent tube with various vapor outlet figures. The objectives of the work are to prevent the chugging occurence by changing vapor outlet condition and to confirm the control volume of chugging by measuring the progression of pressure wave. The result revealed that chugging occurence were restrained by changing outlet figures. The frequency components of some pressure wave at chugging had progressive character. It suggests that an appropriate consideration on the control volume inclued not only vent tube but also vapor bubble should be required for chugging analysis.
公益社団法人日本マリンエンジニアリング学会の論文