CN105576273A - Reversible recycling green energy conversion system and conversion method - Google Patents

Abstract

The invention discloses a reversible cycle green energy conversion system and conversion method. The system integrates electrochemical power generation and energy storage technologies; including a symmetrical solid oxide fuel cell (SSOFC) power generation system and a symmetrical solid oxide electrolytic cell (SSOEC) power generation system. Hydrogen system, waste heat recovery system, gas separation system, hydrogen storage system, oxygen storage system, water storage system, high temperature steam generation system, auxiliary fuel system, power conversion system and corresponding control system. The chemical energy is directly converted into electrical energy through the SSOFC power generation system, which is incorporated into the AC grid through the power conversion system. Since both SSOFC and SSOEC adopt a symmetrical structure, the entire system can change the direction of airflow so that the SSOFC-SSOEC system becomes an SSOEC-SSOFC system, realizing the reversible conversion of power generation and energy storage. The reversible energy conversion system of the present invention has the advantages of large capacity, long life, low cost, high energy conversion efficiency, and environmental friendliness, and the technology of its main components is relatively mature, so it has extremely broad application prospects in the field of new energy.

Description

A reversible cycle green energy conversion system and conversion method

technical field

The invention relates to a solid oxide fuel cell power generation system and a solid oxide electrolytic cell hydrogen production system, in particular to a symmetrical structure solid oxide fuel cell power generation system, a symmetrical solid oxide electrolytic cell hydrogen production system and a conversion method.

Background technique

Solid oxide fuel cell (SOFC) is a new type of power generation device with the advantages of high efficiency, low pollution, and all solid state. Due to its wide adaptability to various fuel gases (hydrogen, hydrocarbons, etc.), it has a wide application base.

The performance of SOFC is largely determined by the catalytic properties of the electrode materials (cathode and anode). Recent studies have shown that the configuration of traditional SOFCs can be replaced by a new configuration in which electrode materials can be used for both cathode and anode, that is, symmetric solid oxide fuel cells (SSOFCs). Because of its simple preparation process, it can effectively solve the sulfur poisoning and carbon deposition on the electrode surface by changing the direction of the airflow, and has recently received extensive attention.

The most direct purpose of developing SSOFC technology is to simplify the preparation process of SOFC and reduce the production cost. Unlike the traditional SOFC preparation process that requires multiple sinterings, SSOFC only needs one sintering process to sinter the electrode material and electrolyte into shape. In addition, the same material is used for both the anode and the cathode, which effectively improves the thermal matching problem between the electrode material and the electrolyte. Because in the conventional SOFC configuration, not only the anode-electrolyte interface but also the cathode-electrolyte interface exists. In SSOFC, there is only one electrode-electrolyte interface. Another major advantage of adopting the SSOFC configuration is that the problems of sulfur poisoning and carbon deposition on the electrode surface can be solved by simply changing the direction of air and fuel gas. More importantly, if the electrode material used can maintain stable performance under multiple cycle working conditions, then this material can also be used as an electrode material for solid oxide electrolytic cells (SOEC).

The solid oxide electrolytic cell (SOEC) is an electrochemical device that converts electrical energy into chemical energy, and its operation process can be regarded as the reverse process of SOFC. Recently, SOEC has attracted the interest of many researchers because it is more efficient and practical than traditional low-temperature hydrogen production methods. The high-temperature water vapor electrolysis technology using the solid oxide electrolysis cell can overcome the shortcomings of the low-temperature electrolysis water hydrogen production technology and realize efficient hydrogen production. Since SOEC is the reverse process of SOFC, and the structure of SOEC and SOFC is similar, both of which are sandwich structures, so if suitable electrode materials are selected, then SSOFC can also be used for SSOEC to produce hydrogen.

How to integrate the above-mentioned SSOFC-SSOEC into a reversible cycle energy conversion system, that is, a symmetrical reversible energy conversion system, and how to make the system more suitable and excellent for use and work has become the focus of current research.

Contents of the invention

The object of the present invention is to provide a reversible energy conversion system using a symmetrical solid oxide fuel cell power generation device and a symmetrical solid oxide electrolytic cell hydrogen production device and a conversion method using the system. The invention integrates electrochemical power generation and energy storage technology; through the SSOFC power generation system, the chemical energy is directly converted into electric energy, which is incorporated into the AC power grid through the power conversion system. The reversible energy conversion system of the invention has the advantages of large capacity, long service life, low cost, high energy conversion efficiency and environmental friendliness.

The technical scheme adopted in the present invention is:

A reversible cycle green energy conversion system, comprising: a structurally symmetrical solid oxide fuel cell SSOFC and a solid oxide electrolytic cell SSOEC, the anode and cathode materials of the structurally symmetrical solid oxide fuel cell and solid oxide electrolytic cell SSOEC are consistent , the electrolyte uses a dense ceramic film of cation conductor and proton conductor; where:

Solid oxide fuel cell SSOFC, which is used to generate electricity to provide electricity for users and the hydrogen production system of solid oxide electrolytic cell SSOEC;

Solid oxide electrolytic cell SSOEC, used to generate hydrogen and oxygen from high-temperature water vapor under the catalysis of electrode materials;

The fuel supply control system provides the fuel gas to the power generation cell stack of the solid oxide fuel cell SSOFC by controlling the flow rate of the fuel gas;

The thermal management system is used to recover the heat generated by the power generation cell stack of the solid oxide fuel cell SSOFC, and provide a heat source for the high-temperature water vapor generation system;

The oxidation gas supply control system is used to collect the oxygen produced on the anode side of the hydrogen production system of the solid oxide electrolytic cell SSOEC, and supply oxygen to the power generation cell stack of the solid oxide fuel cell SSOFC;

The gas separation system is used to dry and separate the mixed gas of hydrogen and water vapor generated by the hydrogen production system of the solid oxide electrolytic cell SSOEC, and provide pure hydrogen for the power generation cell stack of the solid oxide fuel cell SSOFC;

The solid oxide fuel cell SSOFC is connected to the fuel storage tank through the fuel supply control system. One path of the solid oxide fuel cell SSOFC is connected to the thermal management system, and the other path is connected to the load/user; the thermal management system is connected to the water tank through the high-temperature water vapor generation system. The steam supply control system is connected to the solid oxide electrolytic cell SSOEC, and one path of the solid oxide electrolytic cell SSOEC is connected to the solid oxide fuel cell SSOFC through the oxidation gas supply control system and the oxygen circulation system in turn, and the other path is connected to the fuel supply control system through the gas separation system system;

The solid oxide fuel cell SSOFC and the solid oxide electrolytic cell SSOEC can be used interchangeably.

Further, the solid oxide fuel cell SSOFC is supplied with fuel gas through the fuel supply control system, air is supplied through the air inlet, and the oxygen generated by the solid oxide fuel cell SSOFC is supplied with oxygen through the oxidizing gas supply control system and the oxygen circulation system.

Further, the solid oxide fuel cell SSOFC is respectively connected to the user and the solid oxide electrolytic cell SSOEC through a DC/AC converter.

Further, a hydrogen storage and discharge system is provided between the gas separation system and the fuel supply control system.

Correspondingly, the present invention provides a reversible cycle green energy conversion method, including two modes:

Mode A: SSOFC power generation-SSOEC hydrogen production

1) Open the fuel storage tank, adjust and control the flow rate of the fuel gas passing into the anode side of the power generation cell stack of the solid oxide fuel cell SSOFC through the fuel supply control system to regulate and control the fuel gas hydrogen;

2) At the same time, feed oxygen into the cathode side of the power generation cell stack of the solid oxide fuel cell SSOFC to control the amount of oxygen intake; or change the direction of the air flow, feed the fuel gas into the cathode, feed the oxidizing gas into the anode, and open the air Inlet valve to regulate the air flow into the power generation cell stack of the solid oxide fuel cell SSOFC;

3) Heating the solid oxide fuel cell SSOFC to a certain temperature, and the electric energy generated by power generation converts the direct current into alternating current through the DC/AC converter to realize the power generation function and supply power to the user and the SSOEC hydrogen production system respectively;

4) The hydrogen production system of the solid oxide electrolytic cell SSOEC feeds high-temperature water vapor into the cathode side. After heating to a certain temperature, hydrogen and water vapor are generated at the cathode, and oxygen is generated at the anode; steam, hydrogen and water vapor are generated at the anode, and oxygen is generated at the cathode; the function of hydrogen production is realized, and hydrogen and oxygen are provided for the solid oxide fuel cell SSOFC power generation cell stack;

5) Oxygen generated by the anode passes through the oxidation gas supply control system and the oxygen circulation system to the solid oxide fuel cell SSOFC power generation cell stack;

6) The mixed gas of hydrogen and water vapor generated at the cathode is connected to the fuel supply control system through the gas separation system to the solid oxide fuel cell SSOFC power generation cell stack;

Mode B: SSOFC Hydrogen Production-SSOEC Power Generation

7) The anode and cathode of the solid oxide fuel cell SSOFC stop feeding the oxidizing gas and fuel gas respectively, and at the same time feed nitrogen inert gas as a protective atmosphere; then feed high-temperature water vapor at either end, and then stop feeding the protective gas , then switch to SSOEC hydrogen production mode.

Further, the waste heat generated by the solid oxide fuel cell SSOFC3 passes through the thermal management system, the high-temperature water vapor generation system, and the water vapor supply system to the solid oxide electrolytic cell SSOEC hydrogen production system. In this process, the waste heat recovery system and the high-temperature steam generation system are used to generate high-temperature water vapor, and the water vapor is passed into the SSOEC hydrogen production system. The hydrogen and oxygen generated are stored in the hydrogen storage and oxygen storage systems respectively, and the hydrogen and oxygen can be further combined. Oxygen is passed through the cathode and anode of the SSOFC to generate electricity. The water generated in the SSOFC power generation process can be recycled as the water vapor of the SSOEC.

The beneficial effect of the present invention is that the solid oxide fuel cell (SSOFC) with a symmetrical structure can be used as a fuel cell power generation device and a solid oxide electrolytic cell (SSOEC) hydrogen production device. The anode side of the SSOFC is fed with hydrogen as auxiliary fuel, and fed with air or oxygen as oxidant gas for power generation, and the external circuit can be connected to the load. The heat generated by the SSOFC is recovered through the thermal management system. The heat collected by the thermal management system is passed into the high-temperature steam generation system to generate water vapor. The high-temperature water vapor is passed into the cathode of the SSOEC through the high-temperature water vapor control system, and hydrogen is generated through an electrochemical reaction at the anode of the SSOEC. After the hydrogen is purified, it is passed to the anode of the SSOFC as fuel to continue generating electricity. Of course, just by changing the airflow direction of SSOFC-SSOEC, the energy conversion method can be changed to SSOEC-SSOFC. Finally, a reversible energy conversion system from chemical energy (hydrogen energy) ←→ electrical energy is formed.

At present, how can SOFC and SOEC be perfectly combined to realize the dual application of energy storage and discharge, how to improve its cycle stability, freely switch between the two modes, and maintain the stability of the performance of each component, and how to reduce costs and optimize The preparation process, the preparation of commercialized SOFC/SOEC devices, and the ultimate realization of combined equipment for power generation and energy storage are currently a major difficulty and hot spot. First of all, the symmetrical structure of SSOFC can greatly simplify the preparation process and reduce the cost. In addition, on the basis of the structure and materials of SSOFC, the performance of each part of the material under high temperature and high humidity environment can be studied. At the same time, this process can also be regarded as storing electrical energy in the form of hydrogen energy, and the produced _H2 can also be used for fuel cell power generation, which plays a role in "shifting peaks and filling valleys" for large-scale power supply systems, and will contribute to "hydrogen power generation". Combined use" mode and the future hydrogen energy economy provide the necessary technical support. The modularization of SSOFC/SSOEC also provides great convenience for large-scale and hydrogen fuel cell power generation that can flexibly adjust the scale of hydrogen production in the future. Further, if SSOEC can use renewable energy or advanced nuclear reactors as energy sources, it will be possible to achieve efficient and large-scale production of hydrogen. In addition, SSOEC technology can also be used for CO ₂ emission reduction and conversion, and has extremely broad development prospects in today's increasingly severe energy and environmental problems.

The SSOFC/SSOEC system with symmetrical structure can realize the transformation of energy conversion direction from SSOFC-SSOEC to SSOEC-SSOFC only by changing the airflow direction, making the reversible cycle between electrical energy-chemical energy and chemical energy-electrical energy possible.

Description of drawings

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is a schematic structural diagram of the SSOFC-SSOEC reversible energy conversion system of the present invention.

In the figure: 1. Fuel storage tank; 2. Fuel supply control system; 3. Solid oxide fuel cell SSOFC (power generation cell stack); 4. DC/AC converter; 5. Load/user; 6. Thermal management system; 7. High temperature water vapor generation system; 8. Water vapor supply control system; 9. Solid oxide electrolytic cell SSOEC (hydrogen production system); 10. Oxygen gas supply control system; 11. Oxygen circulation system; 12. Gas separation system; 13. Hydrogen storage and discharge system.

detailed description

The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

As shown in Figure 1, the reversible cycle green energy conversion system includes a symmetric solid oxide fuel cell (SSOFC) 3 (which can be used as a power generation cell stack) and a symmetric solid oxide electrolysis cell (SSOEC) 9 (which can be used as a hydrogen production system), The solid oxide fuel cell SSOFC3 is connected to the fuel storage tank 1 through the fuel supply control system 2, one path of the solid oxide fuel cell SSOFC3 is connected to the thermal management system 6, and the other path is connected to the load/user 5; the thermal management system 6 is connected to the high-temperature water The steam generation system 7 is connected to the water vapor supply control system 8 to the solid oxide electrolytic cell SSOEC9, and one path of the solid oxide electrolytic cell SSOEC9 is connected to the solid oxide fuel cell SSOFC3 through the oxidation gas supply control system 10 and the oxygen circulation system 11 in turn, and the other path The gas separation system 12 communicates with the fuel supply control system 2 to the power generating cell stack of the solid oxide fuel cell SSOFC3.

Among them, the solid oxide fuel cell (SSOFC) 3 supplies fuel gas through the fuel supply control system 2, and supplies air through the air inlet, and the oxygen generated by the solid oxide electrolytic cell SSOEC9 is supplied to the control system 10 and the oxygen circulation system 11 through the oxidizing gas. Oxygen is supplied; the generated electric energy supplies power to load/user 5 and solid oxide electrolytic cell SSOEC9 through DC/AC converter 4 respectively.

Wherein, a hydrogen storage and discharge system 13 is provided between the gas separation system 12 and the fuel supply control system 2 .

In this embodiment, the solid oxide fuel cell (SSOFC) 3 power generation cell stack and the symmetrical solid oxide electrolysis cell (SSOEC) 9 hydrogen production system are cell stacks with the same structure and materials, and only A battery stack can realize the functions of power generation and energy storage respectively by feeding different gases at different times. The requirement for the single cells in the battery stack is a single cell with a symmetrical structure, and the main components must have sufficient stability in different atmospheres. The gas (oxygen, hydrogen and water vapor) control system used in the system is composed of gas pipelines, gas pressure gauges and corresponding control valves, etc., to realize the control and adjustment of the gas types and flow rates. The fuel storage tank is mainly composed of hydrogen storage equipment such as hydrogen cylinders or metal hydride hydrogen storage tanks. The thermal management system mainly consists of heat exchangers and corresponding pipelines. The hydrogen storage and discharge system includes hydrogen storage devices, corresponding control valves and pipelines.

The following is a detailed description of each mechanism of the system:

Fuel storage tank 1 is fed into SSOFC as a backup fuel, and the fuel gas is mainly hydrogen;

Fuel supply control system 2, the main function is to control the flow rate of fuel gas;

The solid oxide fuel cell SSOFC3, specifically the symmetrical solid oxide fuel cell (SSOFC) power generation cell stack, is one of the core components of the system. The basic structure of SSOFC is a sandwich structure with a dense electrolyte film in the middle. Appropriate symmetrical electrode materials are screen-printed or sprayed on both sides of the electrolyte sheet, and then calcined at high temperature to make a single-cell sheet. Finally, the single-cell sheet and other components are assembled. into a battery stack.

DC/AC converter 4, whose main function is to convert the direct current sent by the SSOFC into alternating current;

Load/user 5, the direct current generated by SSOFC can provide load/user with continuous power after passing through the DC/AC converter;

Thermal management system 6, whose main function is to recover the heat generated during the SSOFC power generation process, and then provide heat source for the high-temperature steam generation system;

High temperature water vapor generation system 7, this system mainly utilizes the heat of the heat management system to heat liquid water, so that it only becomes high temperature water vapor. The generated high-temperature water vapor can be passed into the SSOEC cell stack to generate hydrogen and oxygen;

Water vapor supply control system 8, its main function is to adjust the flow rate and flow rate of high temperature water vapor;

The symmetrical solid oxide electrolytic cell (SSOEC) 9, whose structure is consistent with that of the solid oxide fuel cell SSOFC3 power generation cell stack, is also a symmetrical structure, and is one of the core components of the system. Its main function is to generate hydrogen and oxygen from high-temperature water vapor under the catalytic action of electrode materials;

Oxidant gas supply control system 10, its main function is to collect the oxygen generated on the anode side of the SSOEC, and adjust the flow rate of oxygen;

Oxygen circulation system 11, its function is mainly to pass the oxidizing gas in the oxidizing gas supply system to the cathode side in the SSOFC;

Gas separation system 12, its main function is to dry and separate the mixed gas of hydrogen and water vapor generated by SSOEC to obtain pure hydrogen;

The main function of the hydrogen storage and discharge system 13 is to store the hydrogen produced in the SSOEC, and in addition, it can release the stored hydrogen to provide fuel gas to the SSOFC.

The main working principle of this system is as follows:

SSOFC: It is a solid oxide fuel cell with a symmetrical structure. This type of battery uses the same anode and cathode materials, and the electrolyte uses a dense ceramic film of cation conductor and proton conductor. The electrode material is made into a slurry, screen printed or sprayed on the surface of the electrolyte membrane, and calcined at a high temperature to form a porous structure, which is conducive to the diffusion and transmission of gases. The calcined sheet battery is called a single cell, and the single cell is assembled into a cell stack to form a symmetrical solid oxide fuel cell stack. Importantly, the stack can also be used in symmetric solid oxide electrolysis cells (SSOEC). For example, as an SSOFC, the oxidizing gas (air) is fed into the cathode end, and the fuel gas is fed into the anode end. After heating to a certain temperature, it can be connected to an external circuit to realize power generation. Change the direction of the air flow, feed the fuel gas at the cathode, and feed the oxidizing gas at the anode, and continue to generate electricity (it can effectively remove the carbon deposited on the anode and solve the phenomenon of sulfur poisoning). For example, as an SSOEC, high-temperature water vapor is introduced into the cathode side, and after heating to a certain temperature, hydrogen is generated at the cathode, and oxygen is generated at the anode to realize the hydrogen production function. If the air flow direction is changed, such as high-temperature water vapor is introduced into the anode, the corresponding original anode becomes the cathode of the SSOEC to generate hydrogen, and the original cathode becomes the anode of the SSOEC to generate oxygen. If the operating state is SSOFC, the one end of the cathode is the oxidizing gas, and the other end is the fuel gas. At this time, it is the power generation mode. At this time, stop feeding oxidizing gas and fuel gas at both ends, and feed inert gas such as nitrogen as a protective atmosphere at the same time; then feed high-temperature water vapor at either end, and then stop feeding protective gas, then it can be converted to SSOEC Hydrogen mode.

This system is used together through SSOFC and SSOEC. This process can also be regarded as storing electrical energy in the form of hydrogen energy, and the hydrogen produced can be used for fuel cell power generation, which can "shift peaks and fill valleys" for large-scale power supply systems. The role of this will provide very strong technical support for the future hydrogen energy economy and the "hydrogen-electricity combination" model. The invention has the advantages of simple equipment, simplified manufacturing process, low cost, high energy conversion efficiency (actually >50%) and no pollution. Due to the symmetrical structure, only by changing the airflow direction of SSOFC-SSOEC, the energy conversion method can be changed to SSOEC-SSOFC, and a set of equipment can realize the free switching of power generation and hydrogen production energy storage to realize the reversible cycle conversion of energy.

Table 1 Function and efficiency comparison of several systems:

It can be seen from the above that, compared with the traditional SOFC or SOEC, the reversible cycle green energy conversion system of the present invention can convert its functions to each other, and the power generation efficiency and electrolysis efficiency have been greatly improved. This system is suitable for popularization and use.

Claims (6)

1. a Reversible Cycle green energy resource converting system, it is characterized in that, comprise: the Solid Oxide Fuel Cell SSOFC of symmetrical configuration and electrolytic tank of solid oxide SSOEC, the Solid Oxide Fuel Cell of described symmetrical configuration is consistent with cathode material with electrolytic tank of solid oxide SSOEC anode, and electrolyte adopts the compacting ceramic film of cationic conductor and proton conductor; Wherein:

Solid Oxide Fuel Cell SSOFC, provides electric energy for generating is produced electric energy for the system for producing hydrogen of load or user and electrolytic tank of solid oxide SSOEC;

Electrolytic tank of solid oxide SSOEC, for generating hydrogen and oxygen by high-temperature vapor under the catalytic action of electrode material;

Fuel supply control system, to be supplied to the generating battery heap of Solid Oxide Fuel Cell SSOFC by fuel gas by controlling the flow velocity of fuel gas;

Heat management system, for the generating battery of Solid Oxide Fuel Cell SSOFC being piled the heat recovery produced, provides thermal source for high-temperature vapor produces system;

Oxic gas supply control system, the oxygen that the system for producing hydrogen anode-side for collecting electrolytic tank of solid oxide SSOEC produces is the generating battery heap oxygen supply of Solid Oxide Fuel Cell SSOFC;

Gas separation system, carries out drying with water vapor mixture for the system for producing hydrogen of electrolytic tank of solid oxide SSOEC is produced hydrogen, is separated, for the generating battery heap of Solid Oxide Fuel Cell SSOFC provides pure hydrogen;

Described Solid Oxide Fuel Cell SSOFC is connected with fuel reservoir tank by fuel supply control system, and Solid Oxide Fuel Cell SSOFC mono-tunnel is communicated with heat management system, and another road is communicated with load or user; Heat management system produces system connectivity steam supply control system to electrolytic tank of solid oxide SSOEC through high-temperature vapor, electrolytic tank of solid oxide SSOEC mono-tunnel successively through oxic gas supply control system, circulating oxygen system connectivity to Solid Oxide Fuel Cell SSOFC, another road through gas separation system be communicated with fuel supply control system to Solid Oxide Fuel Cell SSOFC;

Described Solid Oxide Fuel Cell SSOFC and electrolytic tank of solid oxide SSOEC is used interchangeably.

2. a kind of Reversible Cycle green energy resource converting system according to claim 1, it is characterized in that, described Solid Oxide Fuel Cell SSOFC supplies fuel gas respectively by fuel supply control system, by air intlet air supply, the oxygen produced by Solid Oxide Fuel Cell SSOFC is through oxic gas supply control system and circulating oxygen system oxygen gas-supplying.

3. a kind of Reversible Cycle green energy resource converting system according to claim 1, is characterized in that, described Solid Oxide Fuel Cell SSOFC is connected to load or user and electrolytic tank of solid oxide SSOEC respectively by DC/AC converter.

4. a kind of Reversible Cycle green energy resource converting system according to claim 1, is characterized in that, be provided with and store hydrogen system between described gas separation system and fuel supply control system.

5. a Reversible Cycle green energy resource conversion method, is characterized in that, comprises two kinds of patterns:

A pattern: SSOFC generating-SSOEC produces hydrogen

1) open fuel reservoir tank, fuel gas hydrogen is passed into the flow velocity of the fuel gas of the generating battery heap anode-side of Solid Oxide Fuel Cell SSOFC by fuel supply control system regulable control;

2) simultaneously, pass into oxygen at the generating battery heap cathode side of Solid Oxide Fuel Cell SSOFC, control oxygen feeding amount; Or change the direction passing into air-flow, pass into fuel gas at negative electrode, anode passes into oxic gas, and opens air inlet valve, regulates the air mass flow entering SSOFC generating battery heap;

3) heating solid oxide fuel cell SSOFC is to uniform temperature, and the direct current sent is converted to alternating current by DC/AC converter by the electric energy that generating produces, and realizes electricity generate function, is respectively load or user and SSOEC system for producing hydrogen and powers;

4) system for producing hydrogen of electrolytic tank of solid oxide SSOEC passes into high-temperature vapor at cathode side, and after heating uniform temperature, then at cathode generates hydrogen gas and steam, anode produces oxygen; Or transformation airflow direction, pass into high-temperature vapor at anode, then produce hydrogen and steam at anode, negative electrode produces oxygen; Realize producing hydrogen function, for Solid Oxide Fuel Cell SSOFC generating battery heap provides hydrogen and oxygen;

5) anode produces oxygen and to pile to Solid Oxide Fuel Cell SSOFC generating battery through oxic gas supply control system and circulating oxygen system;

6) fuel supply control system 2 to Solid Oxide Fuel Cell SSOFC generating battery heap is communicated at the gaseous mixture of cathode generates hydrogen gas and steam through gas separation system;

B-mode: SSOFC produces hydrogen-SSOEC generating

7) Solid Oxide Fuel Cell SSOFC two ends anode and negative electrode stop passing into oxic gas and fuel gas respectively, and pass into nitrogen inert gas as protective atmosphere simultaneously; Then pass into high-temperature vapor in any one end, stop subsequently passing into protective gas, be then converted to SSOEC hydrogen-producing mode.

6. a kind of Reversible Cycle green energy resource conversion method according to claim 5, it is characterized in that, the waste heat that described Solid Oxide Fuel Cell SSOFC3 produces produces system, steam feed system to electrolytic tank of solid oxide SSOEC system for producing hydrogen through heat management system, high-temperature vapor.