A Study on Dielectric Properties of High Temperature CO2 Gas Contaminated with PTFE Vapor at 0.8MPa

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: 2021/11/01

タイトル(英語): A Study on Dielectric Properties of High Temperature CO2 Gas Contaminated with PTFE Vapor at 0.8MPa

著者名: Akihiro Tsusaka (Aichi Institute of Technology), Toshiya Yokoi (Aichi Institute of Technology), Toshiro Matsumura (Aichi Institute of Technology), Kazuto Yukita (Aichi Institute of Technology), Yasuyuki Goto (Aichi Institute of Technology), Yasunobu Yokom

著者名(英語): Akihiro Tsusaka (Aichi Institute of Technology), Toshiya Yokoi (Aichi Institute of Technology), Toshiro Matsumura (Aichi Institute of Technology), Kazuto Yukita (Aichi Institute of Technology), Yasuyuki Goto (Aichi Institute of Technology), Yasunobu Yokom

キーワード: dielectric property，gas circuit breaker，PTFE vapor，CO2 gas，alternative gas

要約(英語): Carbon dioxide (CO2) is considered as one of the sulfur hexa-fluoride (SF6) alternatives for arc-quenching gas. In this paper, polytetrafluoroethylen (PTFE) was assumed as the nozzle material of the gas circuit breaker. The dielectric properties in the hot CO2 gas contaminated by PTFE vapor were calculated in the temperature range of 300K to 4,000K at a pressure of 0.8MPa. In this calculation, not only 48 gaseous phase species but also the carbon in solid phase one (graphite) were adopted as component species. It is derived that at temperatures below 2,000K, the critical reduced electric field strength of the hot CO2 gas contaminated with PTFE vapor becomes higher than that of pure CO2 as the PTFE vapor concentration increases. By contrast, in the high temperature region exceeding 2,000K, the critical reduced electric field strength is less than that of pure CO2 when PTFE contamination is 20% or 40%. The dominant reactions governing the critical reduced electric field strength are discussed and listed in the Tables. It is concluded that the dominant reactions are brought about by the dominant particles or particles having large electron collision cross sections.

本誌: 電気学会論文誌B（電力・エネルギー部門誌） Vol.141 No.11 （2021） 特集：開閉保護技術

本誌掲載ページ: 656-665 p

原稿種別: 論文／英語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejpes/141/11/141_656/_article/-char/ja/