Once-through boiler

Japanese: 貫流式ボイラー - かんりゅうしきぼいらー
Once-through boiler

...When the steam pressure is high and it is supercritical (gauge pressure 225.6 kgf/cm2 or more), there is no phase change between the liquid and gas, and steam and water cannot be separated, so a once-through type is used, in which the water becomes steam as it flows through the water wall tube. There are two types of once-through boilers. In one type, the water wall tube is divided into several vertical blocks, and the feedwater flows through them in sequence, with the blocks connected by pipes called downcomers. ...

*Some of the terminology used to refer to "once-through boilers" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…蒸気圧力が高い超臨界圧力(ゲージ圧225.6kgf/cm2以上)の場合は,液体と気体の間に相の変化がなく,蒸気と水を分離することができないため,水が水壁管を流れる間に蒸気となる貫流式が用いられる。貫流式ボイラーには二つの方式がある。一つは水壁管をいくつかの垂直なブロックに分け,給水はそれらを順番に流れるようにしたもので,ブロック間は降水管と呼ばれる管でつながれる。…

※「貫流式ボイラー」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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