Methanol reforming fuel cell heat utilization method based on major cycle and minor cycle

Abstract

The invention discloses a methanol reforming fuel cell heat utilization method based on major cycle and minor cycle. A cycle system corresponding to the methanol reforming fuel cell heat utilization method is composed of a cycle power device, a heating device, an electric pile runner, an electronic thermostat device, a radiating device and a cycle medium. And the method is relates to the technicalfield of the fuel cell. The methanol reforming fuel cell heat utilization method based on major cycle and minor cycle can add the electronic thermostat device in the cycle system, so that the entirecycle system is divided into two cycle systems, the path and time of each cycle period can be shortened, the heating speed is improved, the path and the time of the period cycle are reduced, and the unnecessary heat loss is avoided at the same time; the preheating efficiency is improved when the power consumption is reduced, the electric pile is faster in temperature rise rate and shorter in generation waiting time, and the waiting time of a user is reduced.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a methanol reforming fuel cell heat utilization method based on a large cycle and a small cycle. Background technique [0002] Methanol reforming fuel cell is a high-temperature fuel cell. The optimum temperature for high-temperature proton exchange membrane is 160°C-180°C. The temperature of the fuel cell needs to be maintained between 160°C-180°C during normal operation. During the stage, the temperature of the electric stack itself is lower than the optimum temperature, and the electric stack needs to be preheated externally, and the hydrogen gas can be introduced to generate electricity after it reaches the reaction temperature. During the normal working stage of the fuel cell, the electric stack itself is within the optimum temperature range , Hydrogen and oxygen undergo an electrochemical reaction inside the stack to generate electricity, and at the same time release a l...

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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a methanol reforming fuel cell heat utilization method based on a large cycle and a small cycle, which solves the problem of the long distance and long time for the circulating medium of the existing cycle system to complete the entire cycle, and at the same time In the preheating stage, the circulating medium needs to pass through the useless cooling device. Even if the cooling device is not working, part of the heat loss of the circulating medium will be caused, and the power consumption will increase. At the same time, the heating speed of the electric stack will be reduced, and the heating speed of the entire electric stack will be slow during the preheating stage. , takes a long time, which will cause the user to wait for a long time

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