A control system for methanol reforming fuel cell power generation system under variable load conditions

Abstract

The invention discloses a control system for a methanol reforming fuel cell power generation system under changing load conditions. The methanol reforming fuel cell system fluctuating user demand power control system includes a fuel supply module, a methanol reforming energy module and control module, the present invention performs stage-by-stage control according to the characteristics of the methanol reforming fuel cell system, and regionalizes the power required by the user and the remaining capacity of the energy storage module, and the output power of the methanol reforming fuel cell system , The remaining capacity area of ​​the energy storage module is adjusted for difference and hysteresis. The invention can make the methanol reforming fuel cell system quickly recover and maintain a good state for a long time, make up for the shortcoming of the methanol reforming fuel cell system's slow response, avoid the impact of changing user demand power on the methanol reforming fuel cell system, and satisfy users' global changes The user demand power and intermittent power demand can ensure the efficient and stable operation of the entire power generation system.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a control system for a methanol reforming fuel cell power generation system under varying load conditions. Background technique [0002] Methanol reforming fuel cell is a fuel cell system that uses hydrogen-rich gas generated by methanol reforming reaction as fuel. It is composed of methanol reforming module and proton exchange membrane fuel cell stack. The high power density and high energy efficiency of the stack; at the same time, methanol is used as the input energy of the fuel cell, and the hydrogen is produced and used immediately, avoiding the danger of high pressure during the hydrogen storage process, the low efficiency during the transportation process, and the high cost of use. The methanol steam reforming reaction is an endothermic reaction, so an external heat source is required to maintain the energy required for reforming endothermic and raw material preheating....

AI Technical Summary

Problems solved by technology

The methanol steam reforming reaction is an endothermic reaction, so an external heat source is required to maintain the energy required for reforming endothermic and raw material preheating. In order to improve system efficiency, the unused hydrogen of the fuel cell is usually used by backburning The way to supply heat to the methanol reforming system, combustion tail gas and fuel cell high-temperature exhaust gas is usually used to recover heat by preheating the raw materials, so it is a multi-heat and mass transfer system, but heat and mass transfer is a relatively slow process , the system output power adjustment is also slow, so frequent changes in fuel cell output will affect the stability of methanol reforming fuel cell system operation

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