[특허]Perforated fin heat exchangers and catalytic support

Nuvera Fuel Cells, Inc.

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특허 상세정보

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Perforated fin heat exchangers and catalytic support

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F28F-001/30 F28F-001/24
미국특허분류(USC)	165/133; 165/151; 165/182; 422/198; 422/201
출원번호	US-0195304 (2002-07-12)
발명자 / 주소	Northrop,William F.
출원인 / 주소	Nuvera Fuel Cells, Inc.
대리인 / 주소	Hamilton, Brook, Smith &
인용정보	피인용 횟수 : 7 인용 특허 : 41

초록
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Perforated fins are provided to improve the capabilities of fin and tube type heat exchangers, and to adapt them for flow outside of the tube that is essentially parallel to the axis of the tube. The fins are made of a thermally conductive material, such as metal, with perforations in the fins. Fins can be of any shape. Typically, one or more tubes or binding posts pass through the fins. The fins are attached to the tube or post by press fitting, furnace or torch brazing, welding, or other method of mechanical bonding. The perforations allow heat exchange with the contents of a tube of a fluid flowing essentially parallel to the axis of the tube, in contrast to conventional fin-tube heat exchangers. The fins may also be bonded to a post or other securing means and inserted into the inside of a tube or other hollow body to improve efficiency of heat exchange. In addition, the fins may carry a catalyst, optionally carried on a washcoat or similar treatment to increase surface area.

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What is claimed is: 1. A heat exchanger comprising: a tube adapted to permit the flow of a first fluid inside the tube; a plurality of fins, each fin contacting the outer surface of the tube and oriented generally normal to the tube, each fin comprising perforations to permit the flow of a second fluid therethrough in a direction that is essentially parallel to the tube, at least one of the fins comprising a material for facilitating a change in the composition of the second fluid; and a container surrounding the tube and fins, the container arranged to direct the flow of the second fluid through the fins in a direction that is essentially parallel to the tube to promote the exchange of heat between the first fluid and the second fluid. 2. The heat exchanger of claim 1, wherein at least one of the perforated fins comprises a catalyst. 3. The heat exchanger of claim 1, wherein at least one of the perforated fins comprises a chemical absorbent. 4. The heat exchanger of claim 1, wherein at least one fin is affixed to the tube. 5. The heat exchanger of claim 1, wherein the heat exchanger is incorporated in a plant comprising at least one of a chemical reactor, a nuclear reactor, a biological reactor, and a chemical extraction process. 6. The heat exchanger of claim 1, wherein an output of the heat exchanger comprises at least one of heated air and heated water. 7. The heat exchanger of claim 1, wherein at least one fin comprises a bent portion for increasing the contact area between the fin and the tube. 8. A method for heat exchange between a first fluid and a second fluid, comprising the steps of: providing a tube having a plurality of fins contacting the outer surface of the tube and oriented generally normal to the tube, each fin comprising perforations to permit the flow of a fluid therethrough, the plurality of fins not extending through the tube; flowing a first fluid inside the tube in a direction that is essentially parallel to the tube; and flowing a second fluid through the fins in a direction that is essentially parallel to the tube to promote the exchange of heat between the first fluid and the second fluid, at least one of the fins comprising a material for facilitating a change in the composition of the second fluid. 9. The method of claim 8, further comprising: providing a container surrounding the tube and fins, the container arranged to direct the flow of a second fluid through the fins. 10. The method of claim 8, wherein at least one of the perforated fins comprises a catalyst. 11. The method of claim 8, wherein at least one of the perforated fins comprises chemical absorbent. 12. The method of claim 8, wherein the device is incorporated in a plant comprising at least one of a chemical reactor, a nuclear reactor, a biological reactor, and a chemical extraction process. 13. The method of claim 8, wherein the method produces at least one of heated air and heated water. 14. The method of claim 8, wherein at least one fin is affixed to the tube. 15. The method of claim 8, wherein at least one fin comprises a bent portion for increasing the contact area between the fin and the tube. 16. A heat exchanger comprising: a tube adapted to permit the flow of a first fluid inside the tube; a plurality of fins, each fin contacting the outer surface of the tube and oriented generally normal to the tube, each fin comprising perforations to permit the flow of a fluid therethrough in a direction that is essentially parallel to the tube; a container surrounding the tube and fins, the container arranged to direct the flow of a second fluid through the fins in a direction that is essentially parallel to the tube to promote the exchange of heat between the first fluid and the second fluid; and at least one internal fin contacting the interior surface of the tube and oriented generally normal to the tube, the internal fin comprising perforations to permit the flow of a fluid in a direction that is essentially parallel to the tube, the plurality of fins contacting the outer surface of the tube and the at least one internal fin contacting the interior surface of the tube not extending through the tube; at least one of the fins contacting the outer surface of the tube, or at least one of the internal fins, comprising a material for facilitating a change in the composition of a fluid flowing through the heat exchanger. 17. The heat exchanger of claim 16, wherein at least one fin is affixed to the tube. 18. The heat exchanger of claim 16, wherein at least one fin is not affixed to the tube and makes contact effective for heat exchange when the fin is at a temperature other than ambient temperature. 19. A heat exchanger comprising: a tube adapted to permit the flow of a first fluid inside the tube; a plurality of fins, each fin contacting the outer surface of the tube and oriented generally normal to the tube, each fin comprising open perforations to permit the flow of a fluid therethrough in a direction that is essentially parallel to the tube; and a container surrounding the tube and fins, the container arranged to direct the flow of a second fluid through the fins in a direction that is essentially parallel to the tube to promote the exchange of heat between the first fluid and the second fluid, the heat exchanger being incorporated in a fuel processor for converting hydrocarbon fuel into a mixture comprising hydrogen. 20. The heat exchanger of claim 19, wherein the fuel processor is incorporated in a vehicle. 21. In a fuel processor for converting hydrocarbon fuel into a mixture comprising hydrogen, a method for heat exchange between a first fluid and a second fluid, comprising the steps of: providing a tube having a plurality of fins contacting the outer surface of the tube and oriented generally normal to the tube, each fin comprising open perforations to permit the flow of a fluid therethrough; flowing a first fluid inside the tube in a direction that is essentially parallel to the tube; and flowing a second fluid through the fins in a direction that is essentially parallel to the tube to promote the exchange of heat between the first fluid and the second fluid. 22. The method of claim 21, wherein the fuel processor is incorporated in a vehicle. 23. A heat exchanger comprising: a tube adapted to permit the flow of a first fluid inside the tube; a plurality of fins, each fin contacting the outer surface of the tube and oriented generally normal to the tube, each fin comprising perforations to permit the flow of a fluid therethrough in a direction that is essentially parallel to the tube; and a container surrounding the tube and fins, the container arranged to direct the flow of a second fluid through the fins in a direction that is essentially parallel to the tube to promote the exchange of heat between the first fluid and the second fluid, at least one fin not affixed to the tube and making contact effective for heat exchange when the fin is at a temperature other than ambient temperature. 24. A method for heat exchange between a first fluid and a second fluid, comprising the steps of: providing a tube having a plurality of fins contacting the outer surface of the tube and oriented generally normal to the tube, each fin comprising perforations to permit the flow of a fluid therethrough; flowing a first fluid inside the tube in a direction that is essentially parallel to the tube; and flowing a second fluid through the fins in a direction that is essentially parallel to the tube to promote the exchange of heat between the first fluid and the second fluid; and providing at least one internal fin contacting the interior surface of the tube and oriented generally normal to the tube, the internal fin comprising perforations to permit the flow of a fluid in a direction that is essentially parallel to the tube, the plurality of fins contacting the outer surface of the tube and the at least one internal fin contacting the interior surface of the tube not extending through the tube; at least one of the fins contacting the outer surface of the tube, or at least one of the internal fins, comprising a material for facilitating a change in the composition of a fluid flowing through the heat exchanger. 25. A method for heat exchange between a first fluid and a second fluid, comprising the steps of: providing a tube having a plurality of fins contacting the outer surface of the tube and oriented generally normal to the tube, each fin comprising perforations to permit the flow of a fluid therethrough; flowing a first fluid inside the tube in a direction that is essentially parallel to the tube; and flowing a second fluid through the fins in a direction that is essentially parallel to the tube to promote the exchange of heat between the first fluid and the second fluid, at least one fin not affixed to the tube and making contact effective for heat exchange when the fin is at a temperature other than ambient temperature.

이 특허에 인용된 특허 (41)

이 특허를 인용한 특허 피인용횟수: 7

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Perforated fin heat exchangers and catalytic support

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Perforated fin heat exchangers and catalytic support

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