CN111525154B - Fuel cell and heat engine hybrid power generation system and working method thereof - Google Patents

Fuel cell and heat engine hybrid power generation system and working method thereof Download PDF

Info

Publication number
CN111525154B
CN111525154B CN202010350190.5A CN202010350190A CN111525154B CN 111525154 B CN111525154 B CN 111525154B CN 202010350190 A CN202010350190 A CN 202010350190A CN 111525154 B CN111525154 B CN 111525154B
Authority
CN
China
Prior art keywords
fuel cell
temperature
low
communicated
inlet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202010350190.5A
Other languages
Chinese (zh)
Other versions
CN111525154A (en
Inventor
郑开云
黄志强
蒋励
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Power Equipment Research Institute Co Ltd
Original Assignee
Shanghai Power Equipment Research Institute Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai Power Equipment Research Institute Co Ltd filed Critical Shanghai Power Equipment Research Institute Co Ltd
Priority to CN202010350190.5A priority Critical patent/CN111525154B/en
Publication of CN111525154A publication Critical patent/CN111525154A/en
Application granted granted Critical
Publication of CN111525154B publication Critical patent/CN111525154B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F01D15/10—Adaptations for driving, or combinations with, electric generators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
    • H01M8/04014—Heat exchange using gaseous fluids; Heat exchange by combustion of reactants
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
    • H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
    • H01M8/04097—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with recycling of the reactants
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/06—Combination of fuel cells with means for production of reactants or for treatment of residues
    • H01M8/0606—Combination of fuel cells with means for production of reactants or for treatment of residues with means for production of gaseous reactants
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/08—Fuel cells with aqueous electrolytes
    • H01M8/086—Phosphoric acid fuel cells [PAFC]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/10—Fuel cells with solid electrolytes
    • H01M8/12—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/10—Fuel cells with solid electrolytes
    • H01M8/12—Fuel cells with solid electrolytes operating at high temperature, e.g. with stabilised ZrO2 electrolyte
    • H01M2008/1293—Fuel cells with solid oxide electrolytes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

Abstract

The invention discloses a fuel cell and heat engine mixed power generation system, which has the capacity of 1-100 megawatts and comprises a reforming device, a phosphoric acid fuel cell, a solid oxide fuel cell, a combustion chamber, a compressor, a low-temperature heat regenerator, a low-temperature heat exchanger, a cooling medium pump, a high-temperature heat regenerator, a high-temperature heat exchanger, a turbine and a precooler. The invention can efficiently utilize the residual heat of the phosphoric acid fuel cell and the residual heat of the solid oxide fuel cell, and provides the residual heat of the phosphoric acid fuel cell and the residual heat of the solid oxide fuel cell to the supercritical carbon dioxide cycle as a power generation system of a heat engine, and the total power generation efficiency of the system can reach more than 60 percent.

Description

Fuel cell and heat engine hybrid power generation system and working method thereof
Technical Field
The invention relates to the technical field of power generation, in particular to a fuel cell and heat engine hybrid power generation system and a working method thereof.
Background
With the continuous advance of the hydrogen energy industry, fuel cell technology is also increasingly developed and matured. Among the various types of fuel cells, the most notable are proton exchange membrane fuel cells, phosphoric acid fuel cells, molten carbonate fuel cells, and solid oxide fuel cells. Proton exchange membrane fuel cells are primarily directed to the application requirements in the transportation field, since they are capable of providing high power densities at reasonable operating temperatures (about 80 ℃). Phosphoric acid fuel cells and molten carbonate fuel cells were developed primarily for stationary applications because they have lower power densities than proton exchange membrane fuel cells.
At present, the efficiency of the solid oxide fuel cell can reach more than 50 percent, and the solid oxide fuel cell is being developed for fixed application and transportation application, but the operation temperature is as high as 800-. The phosphoric acid fuel cell is the most mature technology of all fuel cells, can manufacture power generation devices with various specifications from dozens of kilowatts to dozens of megawatts, is a fuel cell product with the largest application amount outside the transportation field, and the delivery amount is increased year by year. The efficiency of the phosphoric acid fuel cell is about 40-50%, the operating temperature is about 200 ℃, and the generated waste heat needs to be discharged and utilized in the operating process, so that the phosphoric acid fuel cell can be used for heat supply or waste heat power generation to improve the energy utilization rate. The working temperature of the solid oxide fuel cell is high, the temperature of the discharged waste gas can reach 800 ℃, the temperature of the tail gas after the residual fuel is combusted in the post combustion chamber can reach more than 1000 ℃, so the grade of the waste heat of the solid oxide fuel cell is very high, and the waste heat can be efficiently utilized by adopting the heat engine to generate electricity. Because the residual heat temperature of the phosphoric acid fuel cell and the solid oxide fuel cell is higher and the heat is large, the phosphoric acid fuel cell and the solid oxide fuel cell can be more fully and efficiently utilized, and considerable economic efficiency can be brought.
In recent years, the supercritical carbon dioxide circulation technology is continuously developed and matured, and the potential advantages are continuously shown. The carbon dioxide has stable chemical property, high density, no toxicity, low cost, simple circulating system, compact structure, high efficiency and air cooling, and the supercritical carbon dioxide circulation can be combined with various heat sources to form a power generation system, so that the supercritical carbon dioxide circulation system has very wide and various application scenes including large-scale centralized power plants and small-scale distributed power plants. In the supercritical carbon dioxide circulation of a simple regenerative arrangement mode, because the specific heat of the working medium at the outlet of the compressor is large and the temperature is low, a low-grade heat source below 200 ℃ can be used as a component of the heat source, the phosphoric acid fuel cell just discharges the waste heat at the temperature, the temperature of the waste heat of the solid oxide fuel cell is high, and the solid oxide fuel cell is suitable for being used as a high-temperature heat source of the supercritical carbon dioxide circulation, so that a new way can be provided for the efficient utilization of the waste heat of the phosphoric acid fuel cell and the waste heat of the solid oxide fuel cell based on a supercritical carbon dioxide circulation system.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to provide the fuel cell and heat engine hybrid power generation system which is reasonable in design, simple in structure, simple and easy to control, and capable of efficiently utilizing the residual heat of the phosphoric acid fuel cell and the residual heat of the solid oxide fuel cell, supplying the residual heat of the phosphoric acid fuel cell and the residual heat of the solid oxide fuel cell to the supercritical carbon dioxide cycle as a heat engine, and enabling the total power generation efficiency of the system to be more than 60%.
In order to solve the technical problems, the invention adopts the following technical scheme:
a fuel cell and heat engine hybrid power generation system is characterized by comprising
A reformer for producing hydrogen by reforming a fuel with water, one inlet of the reformer being in communication with a water source and the other inlet of the reformer being in communication with a fuel source;
the phosphoric acid fuel cell is used for generating electricity, an air inlet of the phosphoric acid fuel cell is communicated with air, and a fuel inlet of the phosphoric acid fuel cell is communicated with a hydrogen-rich gas product outlet of the reforming device;
the solid oxide fuel cell is used for generating electricity, an air inlet of the solid oxide fuel cell is communicated with air, and a fuel inlet of the solid oxide fuel cell is communicated with a hydrogen-rich gas product outlet of the reforming device;
the combustion chamber is used for carrying out combustion treatment on tail gas discharged by the solid oxide fuel cell, and an inlet of the combustion chamber is communicated with a tail gas outlet of the solid oxide fuel cell;
the compressor is used for compressing the carbon dioxide working medium;
the low-temperature regenerator is used for heating the carbon dioxide working medium pressurized by the compressor, and a low-temperature side inlet of the low-temperature regenerator is communicated with an outlet of the compressor;
the low-temperature heat exchanger is used for heating the carbon dioxide working medium pressurized by the compressor, a low-temperature side inlet of the low-temperature heat exchanger is communicated with an outlet of the compressor, and a high-temperature side inlet of the low-temperature heat exchanger is communicated with a cooling medium outlet of the phosphoric acid fuel cell;
the outlet of the cooling medium pump is communicated with a cooling medium inlet of the phosphoric acid fuel cell, and the inlet of the cooling medium pump is communicated with a high-temperature side outlet of the low-temperature heat exchanger;
the low-temperature side inlet of the high-temperature regenerator is respectively communicated with the low-temperature side outlet of the low-temperature regenerator and the low-temperature side outlet of the low-temperature heat exchanger, and the high-temperature side outlet of the high-temperature regenerator is communicated with the high-temperature side inlet of the low-temperature regenerator;
the high-temperature heat exchanger is used for heating the carbon dioxide working medium heated by the high-temperature heat regenerator again, a low-temperature side inlet of the high-temperature heat exchanger is communicated with a low-temperature side outlet of the high-temperature heat regenerator, and a high-temperature side inlet of the high-temperature heat exchanger is communicated with an outlet of the combustion chamber;
the inlet of the turbine is communicated with the low-temperature side outlet of the high-temperature heat exchanger, the outlet of the turbine is communicated with the high-temperature side inlet of the high-temperature regenerator, and the turbine is used for driving the generator to generate electricity;
and the inlet of the precooler is communicated with the high-temperature side outlet of the low-temperature heat regenerator, and the outlet of the precooler is communicated with the inlet of the compressor.
In a preferred embodiment of the present invention, the fuel of the reformer may be any one of natural gas, coal gas and methanol.
In a preferred embodiment of the present invention, the reformer reforming reaction process employs a steam reforming or partial oxidation reforming process.
In a preferred embodiment of the present invention, the pressure at the outlet of the compressor is 15 to 25 Mpa.
In a preferred embodiment of the invention, the inlet temperature of the turbine is 500 to 750 ℃.
In a preferred embodiment of the invention, the residual heat of the gas at the outlet of the high-temperature side of the high-temperature heat exchanger can preheat the air and the hydrogen-rich gas entering the solid oxide fuel cell.
A working method of a fuel cell and heat engine hybrid power generation system is operated by adopting the fuel cell and heat engine hybrid power generation system, and comprises the following steps:
s1, feeding the fuel and water into a reforming device to produce hydrogen, wherein the reforming device produces hydrogen-rich gas products which are respectively fed into a phosphoric acid fuel cell and a solid oxide fuel cell;
s2, generating power by a phosphoric acid fuel cell and generating waste heat, generating power by a solid oxide fuel cell, and further burning the discharged tail gas in a combustion chamber to generate heat;
s3, boosting the carbon dioxide working medium by a compressor, dividing the carbon dioxide working medium into two paths, wherein one path of the carbon dioxide working medium enters a low-temperature heat regenerator to absorb the waste heat of the carbon dioxide working medium discharged by a turbine, and the other path of the carbon dioxide working medium enters a low-temperature heat exchanger to absorb the waste heat discharged by a phosphoric acid fuel cell;
s4, combining the two paths of heated carbon dioxide working media, and allowing the combined carbon dioxide working media to enter a high-temperature heat regenerator to absorb the waste heat of the carbon dioxide working media discharged by a turbine;
s5, the carbon dioxide working medium heated by the high-temperature heat regenerator enters a high-temperature heat exchanger to absorb the heat of the tail gas of the solid oxide fuel cell, and finally enters a turbine to expand to do work, and the tail gas discharged by the high-temperature heat exchanger can be used for preheating air and fuel entering the solid oxide fuel cell;
and S6, the carbon dioxide working medium discharged by the turbine releases heat through the high-temperature heat regenerator and the low-temperature heat regenerator, is cooled to normal temperature through the precooler, and finally returns to the compressor.
Compared with the prior art, the invention can efficiently utilize the residual heat of the phosphoric acid fuel cell and the residual heat of the solid oxide fuel cell, provides the residual heat of the phosphoric acid fuel cell and the residual heat of the solid oxide fuel cell for the supercritical carbon dioxide circulation to be used as a power generation system of a heat engine, adopts the supercritical carbon dioxide circulation in a simple heat regeneration mode, fully utilizes the residual heat of the phosphoric acid fuel cell and the solid oxide fuel cell, and has the total power generation efficiency of more than 60 percent.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a control schematic diagram of the present invention.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.
Referring to fig. 1, the power generation system with the capacity of 1-100 mw comprises a reformer 100, a phosphoric acid fuel cell 200, a solid oxide fuel cell 300, a combustion chamber 400, a compressor 500, a low-temperature regenerator 600, a low-temperature heat exchanger 700, a cooling medium pump 800, a high-temperature regenerator 900, a high-temperature heat exchanger 1000, a turbine 1100, a generator 1200 and a precooler 1300.
The reforming device 100 is used for reforming fuel and water to produce hydrogen, one inlet of the reforming device 100 is communicated with a water source, the other inlet of the reforming device 100 is communicated with a fuel source, in this embodiment, the fuel of the reforming device 100 can be any one of natural gas, coal gas and methanol, and the reforming reaction process of the reforming device 100 adopts a steam reforming or partial oxidation reforming process.
The phosphoric acid fuel cell 200 is used for generating electricity, the air inlet of the phosphoric acid fuel cell 200 is communicated with air, the fuel inlet of the phosphoric acid fuel cell 200 is communicated with the hydrogen-rich gas product outlet of the reforming device 100, the solid oxide fuel cell 300 is used for generating electricity, the air inlet of the solid oxide fuel cell 300 is communicated with air, and the fuel inlet of the solid oxide fuel cell 300 is communicated with the hydrogen-rich gas product outlet of the reforming device 100.
The combustor 400 is used for carrying out combustion treatment on tail gas exhausted by the solid oxide fuel cell 300, an inlet of the combustor 400 is communicated with a tail gas outlet of the solid oxide fuel cell 300, the compressor 500 is used for compressing carbon dioxide working media, and the pressure at an outlet of the compressor 500 is 15-25 Mpa in the embodiment.
The low-temperature heat regenerator 600 is used for heating the carbon dioxide working medium pressurized by the compressor 500, a low-temperature side inlet of the low-temperature heat regenerator 600 is communicated with an outlet of the compressor 500, the low-temperature heat exchanger 700 is used for heating the carbon dioxide working medium pressurized by the compressor 500, a low-temperature side inlet of the low-temperature heat exchanger 700 is communicated with an outlet of the compressor 500, and a high-temperature side inlet of the low-temperature heat exchanger 700 is communicated with a cooling medium outlet of the phosphoric acid fuel cell 200.
The cooling medium pump 800 is used for driving a cooling medium to circulate, an outlet of the cooling medium pump 800 is communicated with a cooling medium inlet of the phosphoric acid fuel cell 200, and an inlet of the cooling medium pump 800 is communicated with a high-temperature side outlet of the low-temperature heat exchanger 700.
The high-temperature regenerator 900 is used for further heating the carbon dioxide working medium heated by the low-temperature regenerator 600, a low-temperature side inlet of the high-temperature regenerator 900 is respectively communicated with a low-temperature side outlet of the low-temperature regenerator 600 and a low-temperature side outlet of the low-temperature heat exchanger 700, and a high-temperature side outlet of the high-temperature regenerator 900 is communicated with a high-temperature side inlet of the low-temperature regenerator 600.
The high-temperature heat exchanger 1000 is used for heating the carbon dioxide working medium heated by the high-temperature heat regenerator 900 again, a low-temperature side inlet of the high-temperature heat exchanger 1000 is communicated with a low-temperature side outlet of the high-temperature heat regenerator 900, and a high-temperature side inlet of the high-temperature heat exchanger 1000 is communicated with an outlet of the combustion chamber 400.
The turbine 1100 is used for providing power, an inlet of the turbine 1100 is communicated with a low-temperature side outlet of the high-temperature heat exchanger 1000, an outlet of the turbine 1100 is communicated with a high-temperature side inlet of the high-temperature heat regenerator 1000, the turbine 1100 is used for driving the generator 1200 to generate electricity, and the inlet temperature of the turbine 1100 is 500-750 ℃ in the embodiment.
The precooler 1300 is used for cooling the carbon dioxide working medium at the high-temperature side outlet of the low-temperature heat regenerator 600, the inlet of the precooler 1300 is communicated with the high-temperature side outlet of the low-temperature heat regenerator 600, and the outlet of the precooler 1300 is communicated with the inlet of the compressor 500.
The invention also discloses a working method of the fuel cell and heat engine hybrid power generation system, which comprises the following steps:
s1, feeding fuel and water into the reforming device 100 to produce hydrogen, wherein the reforming device 100 produces hydrogen-rich gas products which are respectively fed into the phosphoric acid fuel cell 200 and the solid oxide fuel cell 300;
s2, the phosphoric acid fuel cell 200 generates electricity and generates waste heat, the solid oxide fuel cell 300 generates electricity, and the exhausted tail gas enters the combustion chamber 400 to be further combusted to generate heat;
s3, boosting the carbon dioxide working medium by a compressor 500, dividing the carbon dioxide working medium into two paths, wherein one path enters a low-temperature heat regenerator 600 to absorb the waste heat of the carbon dioxide working medium discharged by a turbine 1100, and the other path enters a low-temperature heat exchanger 700 to absorb the waste heat discharged by a phosphoric acid fuel cell 200;
s4, merging the two heated carbon dioxide working media, and allowing the two carbon dioxide working media to enter a high-temperature heat regenerator 900 to absorb the waste heat of the carbon dioxide working media discharged by the turbine 1100;
s5, the carbon dioxide working medium heated by the high-temperature heat regenerator 900 enters the high-temperature heat exchanger 1000 to absorb the heat of the tail gas of the solid oxide fuel cell 300, and finally enters the turbine 1100 to do work by expansion, and the tail gas discharged by the high-temperature heat exchanger 1000 can be used for preheating the air and fuel entering the solid oxide fuel cell 300;
s6, the carbon dioxide working medium discharged by the turbine 1100 releases heat through the high-temperature heat regenerator 900 and the low-temperature heat regenerator 600, is cooled to normal temperature through the precooler 1300, and finally returns to the compressor 500.
In summary, the present invention adopts the parameters in Table 1
Figure BDA0002471672590000071
TABLE 1
The supercritical carbon dioxide cycle power generation efficiency is 39.5%, the residual heat absorbed from the phosphoric acid fuel cell is 0.84MW, and the residual heat absorbed from the solid oxide fuel cell is 1.70 MW.
Given a 40% power generation efficiency of the phosphoric acid fuel cell, the calorific value of the fuel consumed by the phosphoric acid fuel cell is 1.40MW, and the power generation amount is 0.56 MW.
Given a 50% efficiency of the solid oxide fuel cell, the calorific value of the fuel consumed by the solid oxide fuel cell is 3.40MW and the amount of electricity generated is 1.70 MW.
The reformer thermal efficiency is given as 90%.
The initial estimation results in the total power generation efficiency of the whole system being 61.1%.
In conclusion, the invention can efficiently utilize the residual heat of the phosphoric acid fuel cell and the residual heat of the solid oxide fuel cell, the residual heat of the phosphoric acid fuel cell and the residual heat of the solid oxide fuel cell are provided for the supercritical carbon dioxide cycle to be used as a power generation system of a heat engine, the supercritical carbon dioxide cycle of a simple heat regeneration mode is adopted, the residual heat of the phosphoric acid fuel cell and the solid oxide fuel cell is fully utilized, and the total power generation efficiency of the system can reach more than 60%.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (7)

1. A fuel cell and heat engine hybrid power generation system is characterized by comprising
A reformer for producing hydrogen by reforming a fuel with water, one inlet of the reformer being in communication with a water source and the other inlet of the reformer being in communication with a fuel source;
the phosphoric acid fuel cell is used for generating electricity, an air inlet of the phosphoric acid fuel cell is communicated with air, and a fuel inlet of the phosphoric acid fuel cell is communicated with a hydrogen-rich gas product outlet of the reforming device;
the solid oxide fuel cell is used for generating electricity, an air inlet of the solid oxide fuel cell is communicated with air, and a fuel inlet of the solid oxide fuel cell is communicated with a hydrogen-rich gas product outlet of the reforming device;
the combustion chamber is used for carrying out combustion treatment on tail gas discharged by the solid oxide fuel cell, and an inlet of the combustion chamber is communicated with a tail gas outlet of the solid oxide fuel cell;
the compressor is used for compressing the carbon dioxide working medium;
the low-temperature regenerator is used for heating the carbon dioxide working medium pressurized by the compressor, and a low-temperature side inlet of the low-temperature regenerator is communicated with an outlet of the compressor;
the low-temperature heat exchanger is used for heating the carbon dioxide working medium pressurized by the compressor, a low-temperature side inlet of the low-temperature heat exchanger is communicated with an outlet of the compressor, and a high-temperature side inlet of the low-temperature heat exchanger is communicated with a cooling medium outlet of the phosphoric acid fuel cell;
the outlet of the cooling medium pump is communicated with a cooling medium inlet of the phosphoric acid fuel cell, and the inlet of the cooling medium pump is communicated with a high-temperature side outlet of the low-temperature heat exchanger;
the low-temperature side inlet of the high-temperature regenerator is respectively communicated with the low-temperature side outlet of the low-temperature regenerator and the low-temperature side outlet of the low-temperature heat exchanger, and the high-temperature side outlet of the high-temperature regenerator is communicated with the high-temperature side inlet of the low-temperature regenerator;
the high-temperature heat exchanger is used for heating the carbon dioxide working medium heated by the high-temperature heat regenerator again, a low-temperature side inlet of the high-temperature heat exchanger is communicated with a low-temperature side outlet of the high-temperature heat regenerator, and a high-temperature side inlet of the high-temperature heat exchanger is communicated with an outlet of the combustion chamber;
the inlet of the turbine is communicated with the low-temperature side outlet of the high-temperature heat exchanger, the outlet of the turbine is communicated with the high-temperature side inlet of the high-temperature regenerator, and the turbine is used for driving the generator to generate electricity;
and the inlet of the precooler is communicated with the high-temperature side outlet of the low-temperature heat regenerator, and the outlet of the precooler is communicated with the inlet of the compressor.
2. A fuel cell and heat engine hybrid power system as claimed in claim 1, wherein: the fuel of the reforming device can be any one of natural gas, coal gas and methanol.
3. A fuel cell and heat engine hybrid power system as claimed in claim 1, wherein: the reforming reaction process of the reforming device adopts a steam reforming or partial oxidation reforming process.
4. A fuel cell and heat engine hybrid power system as claimed in claim 1, wherein: the pressure at the outlet of the compressor is 15-25 Mpa.
5. A fuel cell and heat engine hybrid power system as claimed in claim 1, wherein: the inlet temperature of the turbine is 500-750 ℃.
6. A fuel cell and heat engine hybrid power system as claimed in claim 1, wherein: the gas waste heat at the high-temperature side outlet of the high-temperature heat exchanger can preheat air and hydrogen-rich gas entering the solid oxide fuel cell.
7. A method of operating a fuel cell and heat engine hybrid power system, the method operating with a fuel cell and heat engine hybrid power system according to any one of claims 1 to 6, comprising the steps of:
s1, feeding the fuel and water into a reforming device to produce hydrogen, wherein the reforming device produces hydrogen-rich gas products which are respectively fed into a phosphoric acid fuel cell and a solid oxide fuel cell;
s2, generating power by a phosphoric acid fuel cell and generating waste heat, generating power by a solid oxide fuel cell, and further burning the discharged tail gas in a combustion chamber to generate heat;
s3, boosting the carbon dioxide working medium by a compressor, dividing the carbon dioxide working medium into two paths, wherein one path of the carbon dioxide working medium enters a low-temperature heat regenerator to absorb the waste heat of the carbon dioxide working medium discharged by a turbine, and the other path of the carbon dioxide working medium enters a low-temperature heat exchanger to absorb the waste heat discharged by a phosphoric acid fuel cell;
s4, combining the two paths of heated carbon dioxide working media, and allowing the combined carbon dioxide working media to enter a high-temperature heat regenerator to absorb the waste heat of the carbon dioxide working media discharged by a turbine;
s5, the carbon dioxide working medium heated by the high-temperature heat regenerator enters a high-temperature heat exchanger to absorb the heat of the tail gas of the solid oxide fuel cell, and finally enters a turbine to expand to do work, and the tail gas discharged by the high-temperature heat exchanger can be used for preheating air and fuel entering the solid oxide fuel cell;
and S6, the carbon dioxide working medium discharged by the turbine releases heat through the high-temperature heat regenerator and the low-temperature heat regenerator, is cooled to normal temperature through the precooler, and finally returns to the compressor.
CN202010350190.5A 2020-04-28 2020-04-28 Fuel cell and heat engine hybrid power generation system and working method thereof Active CN111525154B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010350190.5A CN111525154B (en) 2020-04-28 2020-04-28 Fuel cell and heat engine hybrid power generation system and working method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010350190.5A CN111525154B (en) 2020-04-28 2020-04-28 Fuel cell and heat engine hybrid power generation system and working method thereof

Publications (2)

Publication Number Publication Date
CN111525154A CN111525154A (en) 2020-08-11
CN111525154B true CN111525154B (en) 2022-03-29

Family

ID=71904856

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010350190.5A Active CN111525154B (en) 2020-04-28 2020-04-28 Fuel cell and heat engine hybrid power generation system and working method thereof

Country Status (1)

Country Link
CN (1) CN111525154B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114243071A (en) * 2021-12-17 2022-03-25 上海鲲华新能源科技有限公司 Compressed air energy storage and solid oxide fuel cell combined high-efficiency energy storage method

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU759861B2 (en) * 1998-11-05 2003-05-01 Ebara Corporation Power generation system based on gasification of combustible material
US6623880B1 (en) * 2001-05-29 2003-09-23 The United States Of America As Represented By The Department Of Energy Fuel cell-fuel cell hybrid system
GB0812669D0 (en) * 2008-07-11 2008-08-20 Kinney John Method and apparatus for generating power from biomass
CN102820480A (en) * 2011-06-09 2012-12-12 通用电气公司 Fuel cell and gas turbine hybrid generating system and power generation method implemented by same
CN106703918A (en) * 2017-02-08 2017-05-24 上海发电设备成套设计研究院 Heat-power coordinated supply system and method integrating fuel cell and carbon dioxide circulation
CN209875238U (en) * 2019-03-12 2019-12-31 上海发电设备成套设计研究院有限责任公司 Pure oxygen combustion supercritical carbon dioxide circulation power generation system
CN109854321B (en) * 2019-03-12 2024-02-02 上海发电设备成套设计研究院有限责任公司 Pure oxygen combustion supercritical carbon dioxide circulating power generation system and method

Also Published As

Publication number Publication date
CN111525154A (en) 2020-08-11

Similar Documents

Publication Publication Date Title
CN113540541B (en) SOFC (solid oxide Fuel cell) using ammonia water as fuel, and cascade power generation system and operation method thereof
CN111952642B (en) High-efficiency low-vibration noise fuel cell power generation system
CN109065914B (en) Distributed energy system based on fuel cell and using liquefied natural gas as raw material
CN108439336B (en) Zero-emission hydrogen electric cogeneration system
CN109346744B (en) Supercritical CO 2 Bottom-circulation natural gas fuel cell power generation system and method
CN109915220B (en) Distributed energy supply system and method integrating fuel cell and supercritical carbon dioxide circulation
CN110544785A (en) natural gas self-heating reforming proton exchange membrane fuel cell distributed cogeneration system and method
CN101540410B (en) Natural gas hydrogen production and proton-exchange film fuel cell integrated generation method and device thereof
CN111799819A (en) Coal gasification solid oxide fuel cell hybrid energy storage power generation system
CN210516883U (en) Natural gas self-heating reforming proton exchange membrane fuel cell distributed cogeneration system
CN111525154B (en) Fuel cell and heat engine hybrid power generation system and working method thereof
JPH06103629B2 (en) Combined fuel cell power generation facility
CN109723557B (en) Oxygen-enriched combustion carbon dioxide power generation system integrating solar methane dry reforming
KR102602831B1 (en) Hybrid system of fuel cell
CN216693053U (en) Liquid ammonia gasification system for ammonia decomposition hydrogen production power generation system and power generation system
CN1379494A (en) Electric generation system combining solid oxide fuel battery with turbogenerator
JPH11238520A (en) Fuel cell power generating apparatus
CN206397600U (en) Mixing energy supplying system based on gas turbine and SOFC
KR20020031686A (en) Apparatus and method of efficiency improvement for Fuel Cell generation of electric power sysytem
CN211789285U (en) Purge gas utilization system based on fuel cell combined power generation
CN210123782U (en) Supercritical CO2Bottom circulation natural gas fuel cell power generation system
CN206144672U (en) Fuel cell , gas turbine and organic rankine cycle combined system
JPH11176455A (en) Fuel cell composite power generating device
CN220673403U (en) Multi-energy co-supply system of data center
CN218934567U (en) Ammonia fuel gas turbine power generation system based on indirect cooling circulation and chemical backheating

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant