Gas-liquid separator of fuel cell system

Abstract

A gas-liquid separator capable of decreasing the height dimension thereof and a fuel cell system suitable for the gas-liquid separator are provided. In a gas-liquid separator, an introduction pipe connected to a main pipe includes an enlarged portion. A passage cross-sectional area of the enlarged portion is larger than that of an inlet pipe. An exhaust gas of hydrogen including impurities such as water discharged from a fuel cell stack flows from the inlet pipe and the speed of the exhaust gas in the enlarged portion decreases. As the speed at which the exhaust gas flows into the main pipe decreases, a ratio in which water falls downward increases. For this reason, even when the dimension of the gas-liquid separator in the height direction is shortened, a water separating rate can be maintained. The exhaust gas of hydrogen from which water is separated is reused in the fuel cell stack.

Dependencies are inferred from the claim text.