Control system for methanol reforming fuel cell power generation system under variable load working condition

Abstract

The invention discloses a control system for a methanol reforming fuel cell power generation system under a variable load working condition, and the system comprises a fuel supply module, a methanol reforming module, a fuel cell module, an energy storage module, and a control module. Staged control is carried out according to the characteristics of the methanol reforming fuel cell system, regionalization processing is carried out on the power required by the user and the residual capacity of the energy storage module, and difference and delay adjustment is carried out on the output power of the methanol reforming fuel cell system according to the power required by the user and the residual capacity of the energy storage module. According to the invention, the methanol reforming fuel cell system can be quickly recovered and kept in a relatively good state for a long time, the defect of slow response of the methanol reforming fuel cell system is overcome, the impact of variable user demand power on the methanol reforming fuel cell system is avoided, and the requirements of users on global variable user demand power and discontinuous power utilization are met; and efficient and stable operation of the whole power generation system can be ensured.

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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