SEPARATOR FOR FUEL CELL WHERE SPIRAL FLOW CHANNEL IS FORMED

摘要

PURPOSE: A separator for a fuel cell, which has a spiral flow channel for feeding fuel gas, is provided to reduce the energy loss and pressure drop in the flow channel, thereby helping the drain of water, and to increase the efficiency per square area of the separator, thereby being advantageous in minimization of the separator stack. By using the separator, it is possible to make uniform use of a gas no matter with the gas pressure, and the temperature distribution in the separator becomes homogeneous. CONSTITUTION: The separator for a fuel cell comprises a spiral flow channel comprised of an inflow channel band(Bi), in which channel bands(B) which consist of plurality of parallel channels(C), start from one outside of the separator disc, extend to make a half round along the surface frame of the separator, and further extend to make another half round or more while keeping a distance like the width of the channel band from the frame and the inner surface of the already formed channel, thereby forming a spiral that extends toward the center of the separator; and an outflow channel band(B0), in which the end of the inflow channel band(Bi) at the center of the separator takes a U turn to change the proceeding direction, then makes one round along the inner surface of the inflow channel band, and outwardly extends between the inflow channel bands that are separated from each other with the distance, to the outside of the separator disc.