Unlock instant, AI-driven research and patent intelligence for your innovation.

Operation method of reforming fuel cell system

A fuel cell system and operation method technology, which is applied in fuel cells, fuel cell additives, fuel cell heat exchange, etc., can solve the problems of large volume, complex process structure, low efficiency, etc., achieve the advantages of efficient operation, and optimize thermal management. the effect of the measures

Active Publication Date: 2019-06-25
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
View PDF6 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The low temperature is based on Nafion-based proton exchange membrane, the working temperature is 60-80°C, and the tolerance of carbon monoxide (CO) is only 10ppm, but the concentration of CO in the mixed gas from the reformer can be as high as tens of thousands of ppm, so Need to use multi-stage purification or Pd membrane separation to reduce CO concentration, the whole system has complex process structure, large volume and low efficiency

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Operation method of reforming fuel cell system
  • Operation method of reforming fuel cell system
  • Operation method of reforming fuel cell system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Embodiment 1: The flow chart of methanol reforming fuel cell system is shown in figure 2 One road of methanol is pumped into the combustion chamber 201 through the pump 211, and the heat generated by combustion is transferred to the reforming chamber 202; the other road of methanol flows into the reforming chamber 202 through the pump 212 to undergo steam reforming reaction, and the generated hydrogen enters the stack 300; The heat generated during operation is removed by the heat conduction oil, and the circulation pump 422 pumps the heat conduction oil into the electric stack, flows through the air-cooled radiator 421, and then enters the electric stack again. During the system start-up process, methanol in the combustion chamber is ignited by means of electric ignition or electric heating device 231; the heating of the electric stack also needs the help of electric heating device 423, which first conducts heat to heat-conducting oil, and the heat-conducting oil heats...

Embodiment 2

[0051] Embodiment 2: The system flow of methanol fuel cell is shown in image 3 , on the basis of Embodiment 1, the system adds a heat transfer oil heat exchange chamber 420 and a stack air inlet preheater 430 . The heat exchange chamber 420 can transfer part of the heat of the exhaust gas of the combustion chamber to the heat transfer oil during the start-up phase, and the heat transfer oil then transfers the heat to the electric stack. At the same time, the use of electric heating and exhaust heat exchange can greatly reduce the heating time of the electric stack. The function of the air inlet preheater 430 is to transfer the heat of the exhaust gas to the inlet air, so as to avoid the excessive temperature gradient in the stack from affecting its life.

Embodiment 3

[0052] Embodiment 3: the system flow of methanol fuel cell see Figure 7 . The system adopts an integrated methanol reformer, and the reformer includes: a combustion chamber 201 , a reforming chamber 202 , a burning methanol vaporization chamber 203 , a mixing chamber 204 , and a heat exchange chamber 205 . The whole reformer is carved and milled from a whole piece of aluminum alloy. In addition, the system also has an integrated heat exchanger, which includes: a vaporizer 410 , an exhaust gas cooling oil heat exchanger 420 , a reformed gas cooling chamber 440 , and an exhaust gas heat exchange chamber 450 . The whole heat exchanger makes full use of the waste heat of the combustion exhaust gas, the heat produced by the stack, the waste heat of the stack exhaust gas, and the high-temperature reformed gas to provide heat for the vaporization of methanol, and at the same time reduces the temperature of the reformed gas entering the stack to avoid high temperature damage to the ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

An operation method of a reforming fuel cell system is provided. In the startup stage of the system, a heating device 1 provides heat for a fuel reformer, and a heating device 2 provides heat for a heat conducting circulating medium in a closed-loop pipeline so as to indirectly provide heat for a fuel cell stack. In the operation stage of the system, when the voltage of the fuel cell stack is higher than a set value VS, the fuel cell stack outputs the voltage to the outside. The heat conducting circulating medium radiates heat through a heat exchanger. In the shutdown stage of the system, thetemperature of the fuel cell stack is reduced by increasing the flow rate of the heat conducting circulating medium, and a fuel storage device stops providing fuel for the fuel reformer when the temperature of the stack is lower than a set value TS2. Compared with the prior art, the operation method of the invention makes full use of the thermal energy of each grade, optimizes the thermal management measures of the system, and has obvious advantages in fast startup and efficient operation of the system.

Description

technical field [0001] The invention belongs to the field of fuel cells, and in particular relates to an operating method for reforming a fuel cell system. Background technique [0002] Fuel cell is a kind of energy conversion device that directly converts fuel chemical energy into electrical energy. It has many advantages such as high efficiency, no pollution, and low noise. It has broad application prospects in the fields of power supply, backup power supply and mobile power supply. [0003] Hydrogen is the preferred fuel for fuel cells, but its large-scale application is limited due to many problems in the preparation, storage, and transportation of hydrogen. The use of liquid fuels (methanol, ethanol, diesel, etc.) to reform hydrogen production is an effective solution. [0004] At present, reforming fuel cells can be divided into two categories: low temperature and high temperature according to the operating temperature of the fuel cell. The low temperature is based o...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04014H01M8/04223H01M8/04225H01M8/0612H01M8/04029
CPCY02E60/50Y02P70/50
Inventor 杨林林孙公权
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI