Membrane humidifier for automobile fuel cell power system

Abstract

The invention provides a membrane humidifier for an automobile fuel cell power system, and relates to the technical field of fuel cell system parts. The membrane humidifier comprises a shell, two first flow passage parts and two second flow passage parts, wherein a first fluid passage and a second fluid passage are arranged in a cross way in the shell and penetrate through the shell; the two firstflow passage parts are centrosymmetrically positioned at two ends of the first fluid passage, and have inclined flow guiding parts; the two flow passage parts are positioned at two ends of the secondfluid passage in a mirror symmetry; and a membrane tube bundle unit exists in the shell, is arranged along the direction of the second fluid passage and is connected with the second flow passage parts at two ends. By adopting the membrane humidifier, damp air discharged from tail gas at the cathode side outlet of a fuel cell stack has better gas distribution uniformity, simple flow passage path,small pressure loss and no turbulent flow, can perform sufficient and efficient moisture exchange with to-react dry air entering the cathode side inlet of the fuel cell stack, and meet the requirementof the cathode side of the fuel cell stack on inlet damp air.

Description

technical field [0001] The invention relates to the technical field of fuel cell system components, in particular to a membrane humidifier for an automobile fuel cell power system. Background technique [0002] The appearance of automobiles has had a huge impact on human society, economy, science and technology, and culture. At present, the automobile has become an indispensable means of transportation and transportation in people's daily life, and the automobile industry has also become a pillar industry of the modern economy. With the rapid development of the national economy, my country's automobile industry will also face a period of opportunities for rapid development. With the rapid increase of global car ownership, the energy and environmental problems caused by traditional internal combustion engine vehicles are becoming more and more serious. Energy shortage and environmental pollution are two major challenges facing the automobile industry in the 21st century. ...

AI Technical Summary

Problems solved by technology

In the prior art, for example, in order to improve the efficiency of water vapor exchange, the water-rich exhaust air and the dry reaction air flow in opposite directions, but this method is to exchange humidity from one end to the other. On the one hand, for Realize the countercurrent humidification flow structure, the maximum humidity section of the reaction air and the exhaust air are at the same place, and the minimum humidity section is at the same place, which will lead to a decrease in humidity exchange efficiency; The structure of the membrane tube is prone to collision and turbulence of the flowing air due to poor gas distribution uniformity and high resistance, resulting in a decrease in water exchange efficiency

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