Ballard Power Systems AG, Ballard Power Systems Inc.
대리인 / 주소
Seed IP Law Group PLLC
인용정보
피인용 횟수 :
5인용 특허 :
3
초록▼
Fuel cell system comprising at least one fuel cell which includes an anode compartment and a cathode compartment which are separated from one another by a proton-conducting membrane, further comprising a cathode feeder for delivering oxygen-containing gas to the cathode compartment, an anode feeder
Fuel cell system comprising at least one fuel cell which includes an anode compartment and a cathode compartment which are separated from one another by a proton-conducting membrane, further comprising a cathode feeder for delivering oxygen-containing gas to the cathode compartment, an anode feeder for delivering a liquid coolant/fuel mixture to the anode compartment, the anode compartment being disposed in an anode circuit which comprises a gas separator and a pump, and cooling of the coolant/fuel mixture circulating in the anode circuit is effected by the fuel cell which is designed for operation involving water break-through from the anode compartment into the cathode compartment. The evaporation cooling thus achieved in the fuel cell results in cooling of the coolant/fuel mixture at a steady-state operating temperature which is established in the fuel cell as a function of the membrane properties and the speed of the pump, thus obviating the need for any additional cooler in the anode circuit itself.
대표청구항▼
1. A fuel cell system, comprising:1) at least one fuel cell which hasa) an anode compartment,b) a cathode compartment, andc) a proton-conducting membrane which separates said anode compartment from said cathode compartment and is capable of allowing water to pass;2) a cathode circuit in which said c
1. A fuel cell system, comprising:1) at least one fuel cell which hasa) an anode compartment,b) a cathode compartment, andc) a proton-conducting membrane which separates said anode compartment from said cathode compartment and is capable of allowing water to pass;2) a cathode circuit in which said cathode compartment is disposed, said cathode circuit further including a cathode feeder for delivering oxygen-containing gas to said cathode department;3) an expander unit disposed in said cathode circuit, wherein water vapor generated in the cathode compartment is delivered to said expander unit;4) an anode circuit in which said anode compartment is disposed, said anode circuit further including an anode offtake connected to a gas separator, and an anode feeder for delivering a liquid coolant/fuel mixture to said anode compartment, whereby cooling in the anode circuit is effected by evaporation of liquid coolant that passes through said membrane from the anode compartment into the cathode compartment, with no additional heat exchanger being provided in said anode circuit; and5) means for setting and maintaining a desired operating temperature in said fuel cell by adjusting at least one of pressure in said cathode compartment or a rate of delivery of the liquid coolant/fuel mixture to said anode compartment. 2. The fuel cell system of claim 1, further comprising a compressor unit disposed in said cathode feeder. 3. The fuel cell system of claim 1, further comprising a compressor unit disposed in said cathode feeder. 4. The fuel cell system of claim 3, further comprising a supercharger intercooler, a cooler, and at least one water separator for water recovery, wherein said supercharger intercooler is disposed downstream of the compressor unit, and said cooler and at least one water separator are disposed downstream of the expander unit. 5. The fuel cell system of claim 4, further comprising a feedback line, wherein recycling of recovered water from the at least one water separator into the anode circuit is provided via said feedback line. 6. The fuel cell system of claim 1, further comprising a holding and purification tank disposed in said anode circuit. 7. The fuel cell system of claim 6, further comprising a subsidiary branch of the anode offtake, wherein said holding and purification tank is disposed in said subsidiary branch upstream of said gas separator. 8. The fuel cell system according to claim 1, further comprising:5) a subsidiary branch of the anode offtake, which splits off from said anode offtake, and is connected to said gas separator; and6) a holding and purification tank disposed in said subsidiary branch, upstream of said gas separator. 9. A method of operating a fuel cell system having at least one fuel cell which includes an anode compartment and a cathode compartment which are separated from one another by a proton-conducting membrane, and an anode feeder for delivering a liquid coolant/fuel mixture to the anode compartment, comprising:passing coolant through the proton-conducting membrane from the anode compartment into the cathode compartment;evaporating the coolant in the anode compartment; andadjusting temperature in said at least one fuel cell to a desired value by varying a rate at which said coolant evaporates in said cathode compartment;wherein said varying of said rate at which coolant evaporates in said cathode compartment is performed by adjusting at least one of a flow rate of the liquid coolant/fuel mixture or pressure in said cathode compartment. 10. The method of claim 9, wherein the operating temperature is between 90 and 110° C. 11. A method of controlling an operating temperature of a fuel cell system having at least one fuel cell that includes an anode compartment and a cathode compartment which are separated from one another by a proton-conducting membrane, and an anode feeder for delivering a liquid coolant/fuel mixture to the anode compartment, comprising:passing coolant through the pro ton-conducting membrane from the anode compartment into the cathode compartment;evaporating the coolant passing into the cathode compartment, whereby the evaporation of the coolant cools the coolant/fuel mixture in the anode compartment; andsetting and maintaining a desired operating temperature in said fuel cell system by varying a rate at which said coolant evaporates in said cathode compartment;wherein said varying of said rate at which coolant evaporates in said cathode compartment is performed by adjusting at least one of a flow rate of the liquid coolant/fuel mixture or pressure in said cathode compartment.
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이 특허에 인용된 특허 (3)
Surampudi Subbarao (Glendora CA) Narayanan Sekharipuram R. (Altadena CA) Vamos Eugene (La Canada CA) Frank Harvey A. (Encino CA) Halpert Gerald (Pasadena CA) Olah George A. (Beverly Hills CA) Prakash, Aqueous liquid feed organic fuel cell using solid polymer electrolyte membrane.
Meyer Alfred P. (West Simsbury CT) Scheffler Glenn W. (Tolland CT) Margiott Paul R. (South Windsor CT), Water management system for solid polymer electrolyte fuel cell power plants.
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