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JEET, Vol. 13, No. 6, November 2018
Research on Liquefaction Characteristics of SF6 Substitute Gases
Youping Tu
Area E - Electrical Facilities
Abstract SF6 has been widely used in high voltage power equipment, such as gas insulated switchgear (GIS) and gas insulated transmission line (GIL), because of its excellent insulation and arc extinguishing performance. However, SF6 faces two environmental problems: greenhouse effect and high liquefaction temperature. Therefore, to find the SF6 substitute gases has become a research hotspot in recent years. In this paper, the liquefaction characteristics of SF6 substitute gases were studied. Peng?Robinson equation of state with the van der Waals mixing rule (PR-vdW model) was used to calculate the dew point temperature of the binary gas mixtures, with SF6, C3F8, c-C4F8, CF3I or C4F7N as the insulating gas and N2 or CO2 as the buffer gas.
Keyword SF6 substitute gases,GIS and GIL,Peng-Robinson equation of state,van der Waals mixing rule,dew point temperature.
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