Test system and test method for fuel cell ejector

Abstract

The invention discloses a test system and a test method for a fuel cell ejector. Mainly, a high-pressure gas cylinder is connected with a gas cylinder valve, and the gas cylinder valve is connected with a proportional valve; the proportional valve is connected with a gas inlet of the ejector; an outlet of the ejector is connected with a three-way valve; one outlet of the three-way valve is connected with a gas side inlet of a humidifier; a gas side outlet of the humidifier is connected with a temperature controller; an outlet of the temperature controller is connected with a mixing barrel; theother outlet of the three-way valve is directly connected with the mixing barrel; a discharge outlet of the mixing barrel is connected with a first pressure regulating valve; a backflow outlet of themixing barrel is connected with a second pressure regulating valve; the other end of the second pressure regulating valve is connected with an ejection port of the ejector; a bottom outlet of the mixing barrel is connected with a water pump; and an outlet of the water pump is connected with a water side inlet of the humidifier. Humidity, temperature and pressure conditions of an ejector port andan outlet of the ejector can be quickly established, the use is convenient, the adjustment precision is high, and the experiment conditions are quickly established.

Description

technical field [0001] The invention relates to the field of fuel cells, in particular to a test system and a test method for a fuel cell ejector. Background technique [0002] In "PEM Fuel Cell: Theory and Practice (Plate 2)" (P216~222) translated by Li Donghong et al., the composition of the hydrogen supply system of the fuel cell is explained. In the proton exchange membrane fuel cell system, an ejector or circulation pump is usually required to guide the excess hydrogen from the outlet of the fuel cell with a lower pressure to the inlet of the fuel cell with a higher pressure, so as to realize the temperature and humidity regulation and humidity of the hydrogen at the inlet. Recycling of excess hydrogen. [0003] The ejector test system starts from the perspective of simulating the actual working conditions of the fuel cell, and hopes to test the performance of the ejector quickly and at low cost. Patent document CN201811440156.6 discloses a fuel cell test bench. Howev...

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Problems solved by technology

Patent document CN201811440156.6 discloses a fuel cell test bench. However, it is mainly used for a wide range of original component tests. The temperature and humidity control module is simply described as having a humidifier and a temperature controller. For the actual injector test System construction is not instructive

Patent document CN201810072225.6 discloses a stack simulation device for the development of high-power fuel cell thermal management systems. This device completely simulates the changes in the internal temperature, humidity and internal heat capacity of the stack, but the production and use of the equipment are difficult. more complex

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