Breakdown of gas mixture CO2+N2

On march, we have done test on gas mixture of CO2 + N2 on different gas pressure and different gap distance. The purpose is to test dielectric strength of gases on different parameter. Tested using AC voltage in high voltage lab.


This is the view of flashover of mixture gas.

In this project, it is conclude that mixture of gas CO2+N2 are better insulator than single gas of pure CO2 and N2.Gas mixture composed an electronegative gas and an ordinary gas like N2 have some advantages such as reduction of gas cost, drop of boiling point or liquefaction temperature, and a nonlinear rise of discharge voltage for the low mixing ratio of the electronegative gas.

However, application of gas mixture has some disadvantages. One serious problem is that the liquefied recoveries of a component gas become very difficult, needing low temperature or high pressure, or both.

~This is just a slight information that i post. The full report is almost done, but i'm doing on single gas of CO2 and N2 only. The purpose of this project is to study the dielectric strength of different gas insulator to substitute SF6 gas that has been designated a greenhouse gas subject to emission restrictions at COP3.

~Thanks to lecturers and friends who had helped me a lot during this project ^^