A system for generating electricity which includes an internal manifold fuel cell stack having an anode fuel gas duct, an anode exhaust gas duct, a cathode air duct and a cathode exhaust duct and a plenum having a fuel gas inlet, an anode exhaust gas outlet, an air inlet and a cathode exhaust gas ou
A system for generating electricity which includes an internal manifold fuel cell stack having an anode fuel gas duct, an anode exhaust gas duct, a cathode air duct and a cathode exhaust duct and a plenum having a fuel gas inlet, an anode exhaust gas outlet, an air inlet and a cathode exhaust gas outlet, which plenum is adapted to deliver a fuel gas and air to the internal manifold fuel cell stack. At least one air preheat panel is provided having two parallel planar surfaces disposed proximate and parallel to the internal manifold fuel cell stack and forming at least one air duct between the two parallel planar surfaces, which at least one air duct extends parallel to the two planar surfaces and has at least one cold air inlet and at least one preheated air outlet. The preheated air outlet is in fluid communication with the cathode air duct. In accordance with one embodiment, the internal manifold fuel cell stack, plenum and the at least one air preheat panel are all disposed within a housing.
대표청구항▼
1. In a system for generating electricity comprising at least one internal manifold fuel cell stack comprising a plurality of fuel cell units, each said fuel cell unit comprising an anode electrode, a cathode electrode and an electrolyte disposed between said anode electrode and said cathode electro
1. In a system for generating electricity comprising at least one internal manifold fuel cell stack comprising a plurality of fuel cell units, each said fuel cell unit comprising an anode electrode, a cathode electrode and an electrolyte disposed between said anode electrode and said cathode electrode, a separator plate disposed between said anode electrode of one said fuel cell unit and said cathode electrode of an adjacent said fuel cell unit, gas delivery means for providing fuel gas to said anode electrode and oxidant to said cathode electrode, gas removal means for removing anode exhaust gas and cathode exhaust gas from said fuel cell stack, and stack beat removal means for removing heat from said fuel cell stack, the improvement comprising:said stack heat removal means comprising at least one air preheat panel having two planar surfaces disposed proximate and substantially parallel to a stacking direction of said fuel cell stack and forming at least one air duct between said two parallel planar surfaces and extending parallel to said two planar surfaces having at least one cold air inlet and at least one preheated air outlet. 2. A system in accordance with claim 1, wherein said at least one air duct is in fluid communication with said gas delivery means.3. A system in accordance with claim 2, wherein said gas delivery means comprises a plenum having a fuel gas inlet, an anode exhaust gas outlet, an air inlet and a cathode exhaust gas outlet, said air inlet in fluid communication with said at least one air duct.4. A system in accordance with claim 3, wherein said plenum comprises an anode inlet duct in fluid communication with said fuel gas inlet, an anode exhaust gas duct in fluid communication with said anode exhaust gas outlet, a cathode inlet duct in fluid communication with said air inlet, and a cathode exhaust gas duct in fluid communication with said cathode exhaust gas outlet.5. A system in accordance with claim 4, wherein said plenum further comprises communication means for providing fluid communication between said anode exhaust gas duct and said cathode inlet duct.6. A system in accordance with claim 5, wherein said fuel cell stack, said plenum and said air preheater panel are disposed in a housing.7. A system in accordance with claim 6, further comprising a pre-reformer having a pre-reformer inlet in fluid communication with said anode exhaust gas outlet, and an anode preheater adapted to heat a reformed fuel gas produced by said pre-reformer to an anode inlet temperature, said pre-reformer and said anode preheater disposed within said housing.8. A system in accordance with claim 4, wherein said gas delivery means comprises at least one pre-burner having a fuel inlet in fluid communication with said anode exhaust gas duct and said at least one preheated air outlet and a combustion products outlet in fluid communication with said cathode inlet duct.9. A system in accordance with claim 8, wherein said pre-burner is integral with said plenum.10. A system in accordance with claim 1, wherein said at least one air preheat panel forms a plurality of said air ducts, said air ducts being alternating upflow and downflow ducts.11. A system in accordance with claim 1, wherein said at least one cold air inlet is in a form of a side slot disposed on one side of said at least one air preheat panel.12. A system for generating electricity comprising:an internal manifold fuel cell stack having an anode fuel gas duct, an anode exhaust gas duct, a cathode air duct and a cathode exhaust duct; a plenum having a fuel gas inlet, an anode exhaust gas outlet, an air inlet and a cathode exhaust gas outlet, said plenum adapted to deliver a fuel gas and air to said internal manifold fuel cell stack; at least one air preheat panel having two parallel planar surfaces disposed proximate and parallel to a stacking direction of said internal manifold fuel cell stack and forming at least one air duct between said two parallel planar surfaces, said at least one air duct extending parallel to said two planar surfaces and having at least one cold air inlet and at least one preheated air outlet, said preheated air outlet being in fluid communication with said cathode air duct; and a housing fully enclosing said internal manifold fuel cell stack, said plenum and said at least one air preheat panel. 13. A system in accordance with claim 12 further comprising a pre-burner disposed within said housing having a fuel inlet in fluid communication with said anode exhaust gas duct and said preheated air outlet.14. A system in accordance with claim 13, wherein said pre-burner is integral with said plenum.15. A system in accordance with claim 12, wherein said at least one air preheat panel forms a plurality of said air ducts, said air ducts arranged to provide alternating upflow and downflow of air.16. A system in accordance with claim 12 further comprising a pre-reformer and an anode preheater disposed within said housing, said pre-reformer having a pre-reformer inlet in fluid communication with said anode exhaust gas outlet and said anode preheater adapted to heat a reformed fuel gas produced by said pre-reformer to an anode inlet temperature.17. A system in accordance with claim 12, wherein said housing forms an opening in fluid communication with an air supply whereby air is introduced into an interior of said housing.
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이 특허에 인용된 특허 (4)
Robert C. Ruhl ; Christopher E. Milliken ; Michael A. Petrik, Apparatus and method for cooling high-temperature fuel cell stacks.
Fletcher Nicholas J. (Vancouver CAX) Lamont Gordon J. (Vancouver CAX) Basura Vesna (Burnaby CAX) Voss Henry H. (West Vancouver CAX) Wilkinson David P. (North Vancouver CAX), Electrochemical fuel cell employing ambient air as the oxidant and coolant.
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