Electrical Breakdown Characteristics of Supercritical Trifluoroiodomethane-Carbon Dioxide (CF3I-CO2) Mixtures
Electrical Breakdown Characteristics of Supercritical Trifluoroiodomethane-Carbon Dioxide (CF3I-CO2) Mixtures
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DOI：
10.1109/ceidp49254.2020.9437475
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发表时间：
2020-10
期刊：
影响因子：
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通讯作者：
Jia Wei;A. Cruz;F. Haque;Chanyeop Park;L. Graber
中科院分区：
文献类型：
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作者：
Jia Wei;A. Cruz;F. Haque;Chanyeop Park;L. Graber
超临界流体（SCFs）作为一种新型的介电介质，具有联合收割机的优点，具有低粘度、高传热能力和高介电强度。本文首次报道了三氟碘甲烷（CF_3 I）和二氧化碳（CO_2）混合物在超临界条件下的分解实验结果。实验在均匀电场下的0.1 mm间隙中进行。通过状态方程（EoS）的计算和光学外观的评价，得到实验过程中物质的状态。实验结果表明，当CF 3 I质量分数为10%时，超临界CF 3 I-CO2混合物的介电强度平均为278 kV/mm。我们的实验还表明，这种超临界CF 3 I-CO2混合物的介电行为表现出的介电强度的临界点附近的不连续性。本文指出了使用超临界CF_3 I-CO_2混合物用于高功率密度应用的适用性。
Supercritical fluids (SCFs), as a new type of dielectric medium, combine highly desirable properties of gaseous and liquid dielectrics, most notably: low viscosity, high heat transfer capability, and high dielectric strength. This paper, for the first time, reports the results of breakdown experiments on the mixture of trifluoroiodomethane (CF3I) and carbon dioxide (CO2) under the supercritical conditions. Experiments were conducted in a 0.1 mm gap under a uniform electric field. The state of substance during experiments was obtained by the calculation from the equation of state (EoS), and by evaluating the optical appearance. The experiment result shows a dielectric strength of the supercritical CF3I-CO2 mixture at an average of 278 kV/mm with a 10% CF3 I mass fraction. Our experiments also suggest that the dielectric behavior of this supercritical CF3I-CO2 mixture manifests a discontinuity of the dielectric strength near the critical point. This paper indicates the suitability of using supercritical CF3I-CO2 mixture for high power density applications.