Heat exchanger for fuel cell
a fuel cell and heat exchanger technology, applied in indirect heat exchangers, electrochemical generators, lighting and heating apparatus, etc., can solve the problems of increasing the cost of the fuel cell device, reducing the cooling capacity of the radiator,
Inactive Publication Date: 2005-10-27
DENSO CORP
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- Abstract
- Description
- Claims
- Application Information
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Benefits of technology
[0008] Thus, the cooling capacity of the heat exchanger can be satisfactorily maintained, while cooling water which carries high voltage (electricity) due to electricity produced in the fuel cell can be insulated from the externals by the tanks and the tubes without using electrically insulating refrigerant.
Problems solved by technology
However, the electrically insulating refrigerant such as fluorinert has a lower heat transfer efficiency than general cooling water which is composed of water and ethylene glycol, so that the cooling capacity of the radiator is decreased.
Moreover, the electrically insulating refrigerant is more expensive than general cooling water, thus increasing cost of the fuel cell device.
Method used
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embodiment
(Preferred Embodiment)
[0015] A preferred embodiment of the present invention will be described with reference to FIGS. 1-4. A heat exchanger (radiator 100) according to the present invention is suitably used to cool a fuel cell 10 by refrigerant (cooling water), which is circulated to flow through the fuel cell 10 and the radiator 100. The radiator 100 is mounted in, for example, a fuel-cell vehicle having a traveling motor which is driven by the fuel cell 10.
[0016] The fuel cell 10 generates electricity by a chemical reaction between hydrogen and oxygen. The fuel cell 10 is provided with a fuel cell stack and an exterior casing for accommodating the fuel cell stack therein. The fuel cell stack includes multiple cells which are connected with each other in series. Each of the cells is provided with a polyelectrolyte film which is sandwiched between a positive pole and a negative pole thereof.
[0017] As shown in FIG. 1, the fuel cell 10 is connected with (communicated with) a radiat...
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Abstract
A heat exchanger for cooling a fuel cell is provided with multiple fins, multiple tubes which are laminated and separated from each other by the fin, and at least two tanks which are communicated with the tubes at longitudinal-direction ends of the tubes. Cooling water is circulated to flow through the tubes, the tanks and the fuel cell. The tanks and the tubes are made of resin, while the fins are made of metal. Thus, cooling water which carries electricity can be electrically insulated from the externals by the tanks and the tubes, while the cooling capacity of the heat exchanger can be satisfactorily maintained.
Description
CROSS REFERENCE TO RELATED APPLICATION [0001] This application is based on Japanese Patent Application No. 2004-131780 filed on Apr. 27, 2004, the disclosure of which is incorporated herein by reference. FIELD OF THE INVENTION [0002] The present invention relates to a heat exchanger for cooling a fuel cell. BACKGROUND OF THE INVENTION [0003] In general, referring to JP-2002-33108A, a fuel cell device is provided with a refrigerant cycle system, in which a radiator (heat exchanger for cooling) is arranged. Electrically insulating fluid (refrigerant), for example, fluorine-based inert liquid such as fluorinert of Sumitomo 3M or electrically insulating oil, is circulated in the refrigerant cycle system to flow through the fuel cell device and the radiator, so that the fuel cell device is cooled. The refrigerant passage, in which the electrically insulating refrigerant flows, of the refrigerant cycle system is electrically insulated from the fuel cell device. Therefore, the radiator is ...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F28D1/053F28F1/02F28F1/20F28F21/06H01M8/02H01M8/04
CPCF28D1/05383F28F1/126F28F21/062F28F21/067Y02T90/32H01M8/04029H01M8/04074H01M2250/20Y02E60/50F28F21/084Y02T90/40
Inventor SONODA, YOSHIHIKOOKOCHI, TAKAKI
Owner DENSO CORP