Patent ID: 8003271
Filing Date: 2011-08-23
Classification: F28D,F28F,H01M,Y02E

Abstract:
1. A system including a heat exchanger connected to a fuel cell, the system comprising: a stack of unit cells in the fuel cell; a housing in the heat exchanger having a cooling water inlet and a cooling water outlet connected to the stack of unit cells in the fuel cell; a vertically moving plate in the housing of the heat exchanger, positioned below the cooling water outlet, which moves reciprocally in a first direction and a second direction in the housing, the second direction being opposite to the first direction such that the moving plate is movable in the first direction when the housing receives a supply of pressurized steam therein through the cooling water inlet and is movable in the second direction to discharge cooling water in the housing to the stack of unit cells through the cooling water outlet; and an elastic member coupled with the moving plate to apply an elastic force in the second direction to the moving plate, the moving plate adjusting an amount of cooling water discharged through the cooling water outlet by varying the water level between the moving plate and the cooling water outlet such that during a period of discharging cooling water through the cooling water outlet the moving plate has an equilibrium state between opposing forces that include the pressurized steam acting in the first direction and the elastic force acting in the second direction.