変圧器冷却用の冷却塔散布水へのオゾンの適用―レジオネラ属菌対策―

カテゴリ: 論文誌(論文単位)

グループ名: 【B】電力・エネルギー部門

発行日: 2018/12/01

タイトル(英語): Application of Ozone to Spraying Water in Cooling Tower of Transformer―Sterilization of Legionella―

著者名: 橋本　偉生（東芝プラントシステム（株）），橋口　功（東芝プラントシステム（株）），福井　秀樹（多田電機（株）），小野　祐作（多田電機（株）），中峠　美華（多田電機（株）），山内　四郎（多田電機（株））

著者名(英語): Hideo Hashimoto (Toshiba Plant Systems & Services Corporation), Koh Hashiguchi (Toshiba Plant Systems & Services Corporation), Hideki Fukui (Tada Electric Corrporation), Yusaku Ono (Tada Electric Corrporation), Mika Nakatoge (Tada Electric Corrporation),

キーワード: 変圧器，冷却塔，オゾン，レジオネラ菌，殺菌，腐食　　transformer，cooling tower，ozone，Legionella，sterilization，corrosion

要約(英語): A biofilm of micro-organisms such as bacteria including Legionella, fungi and algae can sometimes grow very rapidly in the spraying water of cooling tower, and can reduce the heat transfer rate of the cooling tower. Bacterial growth can be reduced or prevented by ozone sterilization method effectively. In application of ozone to cooling system of transformer, it is necessary to control ozone concentration for both sterilizing bacteria and suppressing corrosion during 30 years operation. For this purpose, we used heat exchanger model in which sub ppm ozone containing water was flowed through surface part of Cu tube and Cu fin for three month. We verified that Cu corrosion resistance allows thirty years operation and appropriate ozone concentration was effective to sterilization of micro-organisms including genus Legionella. We also used cooling system model including tower spraying in which sub ppm ozone containing water was flowed and circulated. We clarified ozone dissolution and consumption characteristic of transformer cooling system. We proposed optimum operation mode of ozone supplying as intermittent or continuous ozone supply with high sterilizasion effect according to the seasonal temperature change.

本誌: 電気学会論文誌B（電力・エネルギー部門誌） Vol.138 No.12 （2018）

本誌掲載ページ: 939-947 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejpes/138/12/138_939/_article/-char/ja/