IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0519559
(2000-03-06)
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발명자
/ 주소 |
- Klett, James W.
- Burchell, Timothy D.
- Choudhury, Ashok
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출원인 / 주소 |
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
30 인용 특허 :
78 |
초록
▼
A thermally conductive carbon foam is provided, normally having a thermal conductivity of at least 40 W/m·K. The carbon foam usually has a specific thermal conductivity, defined as the thermal conductivity divided by the density, of at least about 75 W·cm3/m·°K·gm. The foam also has a high specific
A thermally conductive carbon foam is provided, normally having a thermal conductivity of at least 40 W/m·K. The carbon foam usually has a specific thermal conductivity, defined as the thermal conductivity divided by the density, of at least about 75 W·cm3/m·°K·gm. The foam also has a high specific surface area, typically at least about 6,000 m2/m3. The foam is characterized by an x-ray diffraction pattern having "doublet" 100 and 101 peaks characterized by a relative peak split factor no greater than about 0.470. The foam is graphitic and exhibits substantially isotropic thermal conductivity. The foam comprises substantially ellipsoidal pores and the mean pore diameter of such pores is preferably no greater than about 340 microns. Other materials, such as phase change materials, can be impregnated in the pores in order to impart beneficial thermal properties to the foam. Heat exchange devices and evaporatively cooled heat sinks utilizing the foams are also disclosed.
대표청구항
▼
A thermally conductive carbon foam is provided, normally having a thermal conductivity of at least 40 W/m·K. The carbon foam usually has a specific thermal conductivity, defined as the thermal conductivity divided by the density, of at least about 75 W·cm3/m·°K·gm. The foam also has a high specific
A thermally conductive carbon foam is provided, normally having a thermal conductivity of at least 40 W/m·K. The carbon foam usually has a specific thermal conductivity, defined as the thermal conductivity divided by the density, of at least about 75 W·cm3/m·°K·gm. The foam also has a high specific surface area, typically at least about 6,000 m2/m3. The foam is characterized by an x-ray diffraction pattern having "doublet" 100 and 101 peaks characterized by a relative peak split factor no greater than about 0.470. The foam is graphitic and exhibits substantially isotropic thermal conductivity. The foam comprises substantially ellipsoidal pores and the mean pore diameter of such pores is preferably no greater than about 340 microns. Other materials, such as phase change materials, can be impregnated in the pores in order to impart beneficial thermal properties to the foam. Heat exchange devices and evaporatively cooled heat sinks utilizing the foams are also disclosed. n of the organic compounds contained in said waste gas. 3. The improved process of claim 1, further comprising: f) pressurizing the purified gas exiting from the regenerators prior to discharging one part of it to the atmosphere and recycling another part of said purified gas so as to form said stream of purified gas used in step d). 4. The improved process of claim 1, further comprising: g) pressurizing the waste gas prior to introducing it into each of said regenerators. 5. The improved process of claim 1, wherein: h) during the second period of time: directing the waste gas exiting from the combustion chamber through a third regenerator similar in configuration to the first and second regenerators, instead of directing said waste gas through the first regenerator, thereby allowing said first regenerator to be purged of any waste gas accumulated therein during the first period of time, and; i) during a third period of time: discharging to the atmosphere through said first regenerator, the waste gas exiting from the combustion chamber while the second regenerator is being purified and the waste gas exiting therefrom is being directed to the third regenerator. 6. The improved process of claim 1, further comprising: j) separating from the waste gas part of the liquid particles contained therein prior to processing said waste gas in order to reduce the amount of heat required to achieve evaporation of the liquid particles remaining in said waste gas. 7. The improved process of claim 1, wherein, in step d), the stream of purified gas is heated by mixing said stream with hot combustion gases supplied by a fuel burner fed in part or totally with combustible liquid separated from said waste gas. 8. The improved process of claim 1, wherein, in step d), the stream of purified gas is heated by mixing said stream with hot gases drawn from the combustion chamber. 9. The improved process of claim 5, further comprising: separating from the waste gas part of the liquid particles contained therein prior to processing said waste gas in order to reduce the amount of heat required to achieve evaporation of the liquid particles remaining in said waste gas, and wherein, in step d), the stream of purified gas is heated by mixing said stream with hot gases supplied by a burner fired in part or totally with combustible liquid separated from said waste gas. 10. The improved process of claim 5, further comprising: separating from the waste gas part of the liquid particles contained therein prior to processing said waste gas in order to reduce the amount of heat required to achieve evaporation of the liquid particles remaining in said waste gas, and wherein, in step d), the stream of purified gas is heated by mixing said stream with hot gases drawn from the combustion chamber.
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