A test method for dew point temperature of fuel cell humidification reaction gas

Abstract

The invention discloses a method for testing the dew point temperature of humidification reaction gas of a fuel cell, which comprises: making a certain flow rate of reaction gas flow through a humidifier for humidification, and monitoring the temperature and pressure of the humidified reaction gas; The wet reaction gas flows into the condenser for condensation treatment, so that the reaction gas changes from an unsaturated state to a saturated state, obtain the quality of condensed water at this time, and monitor the temperature and pressure of the condensed reaction gas; use the basic thermodynamic equation and ideal The gas equation calculates the dew point temperature of unsaturated steam based on the flow rate of the reaction gas before humidification, the temperature and pressure of the reaction gas after humidification, the quality of condensed water, and the temperature and pressure of the reaction gas after condensation. The method for testing the dew point temperature of the fuel cell humidification reaction gas provided by the invention has simple measuring equipment, and the dew point temperature after gas humidification can be directly calculated through the basic laws of thermodynamics and the ideal gas state equation, so that the test result is accurate and reliable.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a method for testing the dew point temperature of a fuel cell humidification reaction gas. Background technique [0002] As a kind of clean energy, fuel cells have been paid more and more attention in recent years, especially with the industrialization and mass production of fuel cells or systems, the accuracy and controllability of the operating conditions of fuel cell stacks or systems are getting higher and higher. People pay more and more attention, especially the test of the dew point temperature of the reaction gas after humidification has always been a relatively big problem. Taking the air humidification of the fuel cell system as an example, at present, there are two methods commonly used in the prior art to determine the dew point temperature of the humidified gas: one is to directly define the temperature of the water passing through the membrane humidifier as the d...

AI Technical Summary

Problems solved by technology

Taking the air humidification of the fuel cell system as an example, at present, there are two methods commonly used in the prior art to determine the dew point temperature of the humidified gas: one is to directly define the temperature of the water passing through the membrane humidifier as the dew point temperature of the humidified gas Another approach is to use a dew point meter to measure the dew point temperature of the humidified gas; the disadvantage of the former is that the gas passing through the membrane humidifier is not necessarily saturated due to the difference in water vapor exchange, that is, the temperature of the humidified water is actually not Not equal to the dew point temperature of the humidified gas, resulting in inaccurate test results of this method

The disadvantage of the latter is that the existing dew point meters on the market are prone to water accumulation on the dew point probe when testing the dew point temperature, which will cause deviations in the measured dew point temperature value, and the accuracy of the test results cannot be guaranteed; and The dew point meter is usually expensive, which makes the test costly and uneconomical

Images