Patent ID: 6355368
Filing Date: 2002-03-12
Classification: F28D,H01M,Y02E

Abstract:
A system comprising:a stack of fuel cell flow plates including openings to form an inlet manifold passageway and an outlet manifold passageway to communicate a coolant through the stack, the flow plates capable of transferring thermal energy to the coolant to cause the coolant to change from a liquid state into a gas state; a condenser to change the coolant from the gas state to the liquid state; at least one conduit connected to communicate the coolant between the condenser and the inlet and outlet manifold passageways; a chamber in communication with the condenser, the chamber including a first opening in communication with the atmosphere and a second opening in communication with the condenser; and a diaphragm located in the chamber between the first and second openings to allow expansion to substantially maintain atmospheric pressure in the condenser.