IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0043752
(2002-01-09)
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발명자
/ 주소 |
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출원인 / 주소 |
- The Trustees of Dartmouth College
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
6 |
초록
▼
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 betw
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.
대표청구항
▼
The invention claimed is: 1. A system for melting ice, comprising: an electrical conductor for generating an AEF in response to an AC voltage; a gas-filled layer proximate to the electrical conductor, the gas-filled layer containing a plasma-forming gas for forming a plasma in response to an AEF; a
The invention claimed is: 1. A system for melting ice, comprising: an electrical conductor for generating an AEF in response to an AC voltage; a gas-filled layer proximate to the electrical conductor, the gas-filled layer containing a plasma-forming gas for forming a plasma in response to an AEF; and a permanent outer shell, wherein the gas-filled layer is disposed between the electrical conductor and the permanent outer shell. 2. A system as in claim 1, wherein the permanent outer shell comprises a conductive layer. 3. A system as in claim 1, wherein ice on the permanent outer shell forms a conductive layer. 4. A system as in claim 1, wherein the electrical conductor is a main conductor of a power transmission line. 5. A system as in claim 1, further comprising: an AC power source for applying an AC voltage to the electrical conductor. 6. A system as in claim 1, further comprising: an AC voltage in the electrical conductor that generates an AEF, which AEF causes electric breakdown in the gas-filled layer. 7. A system as in claim 6, wherein the AC voltage has a frequency in a range of about from 50Hz to 1 MHz. 8. A system as in claim 6, wherein the AC voltage has a voltage in a range of about from 10 kV to 1300 kV. 9. A system as in claim 1, wherein the gas-filled layer comprises a gas selected from the group consisting of air, nitrogen and argon. 10. A system as in claim 1, wherein the gas-filled layer has a thickness in a range of about from 0.5 to 10 mm. 11. A system as in claim 1, wherein the permanent outer shell is electrically nonconductive. 12. A system as in claim 1, wherein the permanent outer shell is electrically conductive. 13. A system as in claim 12, further comprising a switch for electrically shorting the electrical conductor and the conductive permanent outer shell. 14. A system as in claim 1, wherein the gas-filled layer comprises gas-containing balls. 15. A system as in claim 1, wherein the permanent outer shell is a flexible band and wherein the gas-filled layer is contained within the flexible band. 16. A system for generating heat, comprising: an electrical conductor for generating an AEF in response to an AC voltage; a gas-filled layer proximate to the electrical conductor, the gas-filled layer containing a plasma-forming gas for forming a plasma in response to the AEF; an AC power source for applying an AC voltage to the electrical conductor; and a permanent outer shell, wherein the gas-filled layer is disposed between the electrical conductor and the permanent outer shell. 17. A system as in claim 16, wherein the permanent outer shell comprises a conductive layer. 18. A system as in claim 16, wherein the AC power source provides an AC voltage for generating an AEF having sufficient field strength to cause electric breakdown of gas in the gas-filled layer when a conductive layer is proximate to the electrical conductor. 19. A system as in claim 16, wherein the AC power source provides an AC voltage for generating an AEF having a strength in a range of about from 1 to 100 kV/cm. 20. A system as in claim 16, wherein the AC power source provides and AC voltage in a range of about front 10 kV to 1300 kV. 21. A system as in claim 16, wherein the AC power source provides an AC voltage having a frequency in a range of about from 50 Hz to 1 MHz. 22. A method for melting ice, comprising a step of: generating an AEF in a gas-filled layer proximate to the ice for causing electric breakdown of gas and the formation of plasma in the gas-filled layer, wherein the gas-filled layer is disposed between an electrical conductor and a permanent outer shell. 23. A method as in claim 22, wherein the step of generating an AEF includes generating an AEF having a strength in a range of about from 1 to 100 kV/cm. 24. A method as in claim 22, wherein the step of generating an AEF includes applying an AC voltage to an electrical conductor. 25. A method as in claim 24, wherein applying an AC voltage to the electrical conductor includes applying a voltage in a range of about from 10 kV to 1300 kV. 26. A method as in claim 24, wherein applying an AC voltage to the electrical conductor includes applying a voltage with a frequency in a range of about from 50 Hz to 1 MHz. 27. A method as in claim 24, wherein the electrical conductor is a main conductor of a power transmission line. 28. A meted as in claim 22, wherein ice on the permanent outer shell forms a conductive layer. 29. A method as in claim 22, wherein the permanent outer shell comprises a conductive layer. 30. A method as in claim 29, wherein the conductive layer includes a conductive metal-containing material.
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