초록 ▼

A water tank 21 for stocking processed water used for cooling of a solid polymer type fuel cell 6, etc., cooling water supply means for supplying the processed water to the fuel cell 6 reactant air supplying means for supplying the reactant air to the fuel cell 6, and fuel gas supply means for elect

A water tank 21 for stocking processed water used for cooling of a solid polymer type fuel cell 6, etc., cooling water supply means for supplying the processed water to the fuel cell 6 reactant air supplying means for supplying the reactant air to the fuel cell 6, and fuel gas supply means for electrode reaction are provided, and the reactant air supply means passes the reactant air through the water tank 21 to add moisture to the gas.

대표청구항 ▼

The invention claimed is: 1. A solid polymer type fuel cell comprising: a fuel-cell main body for performing power generation through the electrochemical reaction between hydrogen in reformed gas and oxygen in reactant air; a reactant air supply portion for supplying the reactant air to the fuel-ce

The invention claimed is: 1. A solid polymer type fuel cell comprising: a fuel-cell main body for performing power generation through the electrochemical reaction between hydrogen in reformed gas and oxygen in reactant air; a reactant air supply portion for supplying the reactant air to the fuel-cell main body; a reformed gas supply portion for supplying the reformed gas to said fuel-cell main body; and a processed water supply portion comprising a processed water tank for stocking processed water and for supplying processed water, wherein said processed water tank supplies the processed water to said reformed gas supply portion to humidify the reformed gas, humidifies the reactant air supplied from said reactant air supply portion by using the processed water, and supplies the humidified reactant air to said fuel-cell main body, wherein said water supply portion comprises water processing means for subjecting water to predetermined processing and supplying the processed water to the processed water tank, and wherein said water supply portion further comprises a liquid level control portion for keeping the water level of processed water in a predetermined range so that a gas-phase portion is formed in said water tank at all times, the reactant air from said reactant air supply portion being humidified while passing through said water tank and supplied to said fuel-cell main body. 2. The solid polymer type fuel cell as claimed in claim 1, further comprising a cooling portion for circulating the processed water from said processed water supply portion to said fuel-cell main body to cool said fuel-cell main body. 3. The solid polymer type fuel cell as claimed in claim 1, wherein said liquid level control portion comprises a water level gauge for detecting the water level of the processed water and a motor operated valve for controlling supply of the processed water from a processed water source into said processed water tank. 4. The solid polymer type fuel cell as claimed in claim 1, wherein said processed water supply portion comprises a processed water tank in which processed water is stocked, and temperature adjusting means for keeping the temperature of the processed water in said processed water tank in a predetermined range, wherein the degree of humidification is adjusted by a set temperature when the reactant air from said reactant air supply portion is humidified while passing through said processed water tank. 5. The solid polymer type fuel cell as claimed in claim 4, wherein the upper limit value of the predetermined range of the processed water to be adjusted by said temperature adjusting means is varied in accordance with the operation temperature of said fuel cell. 6. The solid polymer type fuel cell as claimed in claim 5, wherein the predetermined temperature range of the processed water to be adjusted by said temperature adjusting means ranges from 60��C to 80��C. 7. The solid polymer type fuel cell as claimed in claim 4, wherein said temperature adjusting means has an electrical heater. 8. The solid polymer type fuel cell as claimed in claim 1, further comprising a steam supply portion for vaporizing the processed water from said processed into steam and adding the steam to raw material supplied to said reformed gas supply portion, wherein said steam supply portion adjusts the addition amount of water so that the ratio (S/C ratio) between the amount of supplied water and the amount of raw fuel gas ranges from 3to 4. 9. The solid polymer type fuel cell as claimed in claim 1, wherein said reformed gas supply portion has a CO remover for reducing the concentration of carbon monoxide in the reformed gas, and the reformed gas output from said CO remover is supplied to said fuel-cell main body without removing moisture therefrom. 10. The solid polymer type fuel cell as claimed in claim 1, further comprising water processing means for subjecting city water to predetermined processing to generate processed water having low electrical conductivity, and supplying the processed water thus generated to said processed water supply portion. 11. The solid polymer type fuel cell as claimed in claim 1, further comprising an exhaust heat recovery portion that is supplied with high-temperature gas discharged from said fuel-cell main body and recovers heat generated in said fuel-cell main body through the electrochemical reaction between hydrogen in the reformed gas and oxygen in the reactant air. 12. The solid polymer type fuel cell as claimed in claim 11, wherein said exhaust heat recovery portion comprises a heat exchanger in which water is circulated to be heat-exchanged with high-temperature gas discharged from said fuel-call main body, and a hot water tank for stocking hot water from said heat exchanger and supplying water to said heat exchanger. 13. The solid polymer type fuel cell as claimed in claim 12, further comprising a heat exchanger that is attached to said processed water supply portion and performs the heat exchange between the processed water and the water while the processed water and the water are circulated in said heat exchanger so as not to be mixed with each other. 14. The solid polymer type fuel cell as claimed in claim 11, wherein said exhaust heat recovery portion comprises a heat exchanger in which the processed water from said processed water supply portion is circulated to be heat-exchanged with high-temperature gas discharged from said fuel-cell main body, thereby performing exhaust heat recovery. 15. The solid polymer type fuel cell as claimed in claim 1, further comprising a cooling portion in which cooling refrigerant is circulated, said cooling portion being attached to said fuel-cell main body and performing heat exchange with said fuel-cell main body to cool said fuel-cell main body, wherein heat exchange is performed between the processed water from said processed water supply means and the cooling refrigerant from said cooling portion while the processed water and the cooling refrigerant are circulated without being mixed with each other, thereby recovering heat generated in said fuel-cell main body to said processed water supply portion. 16. The solid polymer type fuel cell as claimed in claim 1, further comprising a water withdrawing portion for withdrawing water generated in said fuel-cell main body. 17. The solid polymer type fuel cell as claimed in claim 16, wherein said water withdrawing portion comprises a heat exchanger for performing the heat exchange between discharge gas from said fuel-cell main body and water circulated therein to liquefy and withdraw water from the discharge gas, and a water resupply portion for temporarily stocking the water withdrawn by said heat exchanger and city water. 18. The solid polymer type fuel cell as claimed in claim 17, wherein said water resupply portion supplies the stocked water to said processed water supply portion in accordance with the water level thereof. 19. The solid polymer type fuel cell as claimed in claim 18, wherein said water resupply portion comprises a water level gauge for detecting the water level and controls supply of the city water to said water resupply portion and supply of stocked water to said processed water portion in accordance with the detection result of said water level gauge. 20. The solid polymer type fuel cell as claimed in claim 17, further comprising a water processing portion disposed at the front stage of said water resupply portion or between said water resupply portion and said processed waster supply portion, said water processing portion performing predetermined processing on city water to generate processed water having low electrical conductivity, and supplying the processed water thus generated to said water resupply portion or said processed water supply portion. 21. The solid polymer type fuel cell as claimed in claim 16, further comprising a cooling portion which is attached to said fuel-cell main body and in which cooling refrigerant is circulated to be heat-exchanged with said fuel-cell main body to cool said fuel-cell main body, wherein the processed water from said processed water means and the cooling refrigerant from said cooling portion are heat-exchanged with each other while the processed water and the cooling refrigerant are circulated so as not to be mixed with each other, thereby recovering heat generated in said fuel-cell main body to said processed waster supply portion. 22. The solid polymer type fuel cell as claimed in claim 17, further comprising: a first processed water supply path for directly supplying the stocked water of said water resupply portion to said processed supply portion; a second processed water supply portion for supplying, through a water processing device for conducting predetermined processing on the stocked water of said water resupply portion to generate processed water having low electrical conductivity, the processed water to said processed water supply portion; a water quality detector for detecting the water quality of the stocked water of said water resupply portion; and a processed water path switching portion for selecting one path of said first processed water supply path and said second processed water supply path and supplying the processed water to said processed water portion, which are disposed between said water resupply portion and said processed water supply portion. 23. The solid polymer type fuel cell as claimed in claim 22, wherein said water quality detector comprises a conductometric device of water or water quality sensor. 24. The solid polymer type fuel cell as claimed in claim 17, further comprising: a first processed water supply path for directly supplying the stocked water of said water resupply portion to said processed supply portion; a second processed water supply portion for supplying, through a water processing device for conducting predetermined processing on the stocked water of said water resupply portion to generate processed water having low electrical conductivity, the processed water to said processed water supply portion; and a processed water path switching portion for selecting one path of said first processed water supply path and said second processed water supply path at a predetermined time cycle and supplying the processed water to said processed water portion, which are disposed between said water resupply portion and said processed water supply portion. 25. The solid polymer type fuel cell as claimed in claim 1, wherein said water processing portion further includes a mechanism for heating the processed water of said processed water supply portion by heat generated from a power generation system having said fuel cell. 26. The solid polymer type fuel cell as claimed in claim 25, wherein said mechanism has a heat exchanger for adjusting the temperature of the processed water of said processed water supply portion through heat exchange using the heat generated in said power generating system. 27. The solid polymer type fuel cell as claimed in claim 1, further comprising a heat exchanger that is attached to said processed water supply portion and in which the processed water in said processed water supply portion is circulated, wherein the temperature of the processed water in said processed water supply portion is adjusted through the heat exchange in said heat exchanger. 28. A solid polymer type fuel cell comprising: a fuel-cell main body for performing power generation through the electrochemical reaction between hydrogen in reformed gas and oxygen in reactant air; a reactant air supply portion for supplying the reactant air to the fuel-cell main body; a reformed gas supply portion for supplying the reformed gas to said fuel-cell main body; and a processed water supply portion comprising a processed water tank for stocking processed water and for supplying processed water, and a water processing means for subjecting water to predetermined processing and supplying the processed water to the processed water tank; wherein said reactant air supply portion communicates with an inlet of the processed water tank for humidifying the reactant air before the reactant air is supplied to the fuel-cell main body, wherein said process water tank comprises a first outlet communicating with said reformed gas supply portion for supplying processed water to said reformed gas supply portion to humidify the reformed gas, and a second outlet communicating with the fuel-cell main body for supplying humidified reactant air to said fuel-cell main body, and wherein said processed water supply portion further comprises a liquid level control portion for keeping the water level of processed water in a predetermined range so that a gas-phase portion is formed in said water tank at all times, the reactant air from said reactant air supply portion being humidified while passing through said water tank and supplied to said fuel-cell main body.