Plasma-based de-icing

Details Plasma-based de-icing Plasma-based de-icing

2006-11-21

2006-11-21

Paschall, Mark (Department: 3742)

Electric heating

Metal heating

By arc

C219S121590, C219S121380, C219S121510, C315S111210, C244S13400A, C244S13400A

Reexamination Certificate

active

07138599

ABSTRACT:
An electrical conductor and a gas-filled layer are located at or near the surface of an object being deiced. The conductor carries an AC voltage that generates an alternating electric field in the gas-filled layer. A conductive layer increases the electric field strength in the gas-filled layer between the electrical conductor and the conductive layer. The alternating electric field causes electric breakdown of gas and plasma-formation in the gas-filled layer. The plasma absorbs energy released during electric discharge through the plasma, which heats ice, causing it to melt. The alternating electric field typically has a field strength in a range of about from 1 to 100 kV/cm. The AC voltage typically has an amplitude in a range of about from 10 kV to 1300 kV, and a frequency in a range of about from 50 Hz to 1 MHz. The gas-filled layer includes a plasma-forming gas selected from, among others, air, nitrogen and argon.

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“Power lines may clean air pollution”, Gemini No. 4 Dec. 1996, pp. 1-3.

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