Fuel cell test gas temperature and humidity control system and method

Abstract

The invention discloses a fuel cell test gas temperature and humidity control system, which comprises a gas supply loop connected between a hydrogen source and a galvanic pile, and a humidification water loop and a cooling water loop connected with the gas supply loop, wherein the gas supply loop is directly connected with the galvanic pile to input reaction gas meeting set pressure, flow, temperature and humidity to the galvanic pile, the humidification water loop and the gas supply loop pass through the same humidifier and are connected to the two ends of the humidifier at the same time to humidify gas and conduct temperature exchange at the same time, and the cooling water loop and the gas supply loop are connected to the two ends of the heat exchanger at the same time to conduct heat exchange on the humidified gas. The invention further discloses a control method of the fuel cell test gas temperature and humidity control system. The control method is high in precision, quick in response, suitable for various humidifying and temperature adjusting modes and beneficial to reducing structural complexity and system cost.

Description

technical field [0001] The invention belongs to the technical field of fuel cell testing, and in particular relates to a fuel cell testing gas temperature and humidity control system and method. Background technique [0002] A fuel cell is an electrochemical device that can effectively control the chemical reaction of fuel and oxidant and convert the chemical energy into electrical energy directly. Its power generation efficiency is not limited by the Carnot cycle, and it is a new type of high-efficiency and clean power source. , known as the fourth power generation method after thermal power, hydropower and nuclear power. [0003] Fuel cell operation requires specific pressure, temperature, and humidity conditions, any of which will have an impact on the power output of the fuel cell. The test system applied to fuel cells is used to simulate various actual working conditions. It needs to provide accurate parameters such as air supply temperature, humidity, flow and pressur...

AI Technical Summary

Problems solved by technology

[0006] CN108232250A proposes a proton exchange membrane fuel cell air humidity control system, which first adjusts the intake air temperature, and then adjusts the intake air humidity. Even if heat preservation treatment is added, the intake air temperature will still be changed to varying degrees after the intake air humidity is adjusted, especially When the deviation between the set humidity and the intake air humidity is large, the intake air temperature will vary greatly, making it difficult to stabilize to the set temperature

[0007] CN109597452A proposes a high-power fuel cell test platform gas temperature and humidity control system, which uses the stack circulating cooling water to increase the temperature of the humidifying gas entering the stack, and is only used for designated humidifiers, in which two heat exchangers are used to increase The volume and structural complexity of the test equipment

CN101447575 proposes a fuel cell humidity control method, but its humidifier cannot be adjusted, and the air humidity can only be adjusted by adjusting the dry gas flow

CN103560261A proposes a method to control the humidity of dry gas by adjusting the flow rate of wet gas, but it is only applicable to membrane humidification devices

Images