CN114639853A - Solid oxide fuel cell cogeneration system with integrated hydrogen energy storage and its operation strategy - Google Patents

Abstract

The invention discloses a solid oxide fuel cell combined supply system integrating hydrogen energy storage and an operation strategy. The system utilizes wind power generation, photovoltaic power generation and low-cost valley electricity to prepare green hydrogen through a proton exchange membrane electrolytic cell, and high-efficiency energy storage is realized by combining mechanical compression; meanwhile, the solid oxide fuel cell which takes hydrogen as fuel is adopted to generate electricity, so that green, efficient and zero-emission electricity generation is realized; the waste heat recovery system is used for recovering the compression heat generated in the hydrogen and oxygen compression process and the exhaust allowance of a gas turbine in the fuel cell system step by step; and finally, the double-effect absorption refrigerator/heat pump is utilized to meet the cooling/heating requirements. The invention can effectively stabilize the intermittency and fluctuation of wind energy and solar energy power generation, store wind power generation, photovoltaic power generation and low-price valley electricity, realize high-efficiency power generation and gradient utilization of energy, and simultaneously meet the energy utilization requirements of cold, heat, electricity, hydrogen and oxygen of users.

Description

Solid oxide fuel cell cogeneration system with integrated hydrogen energy storage and its operation strategy

technical field

The invention relates to the technical field of hydrogen energy storage and combined cooling, heating and power supply, in particular to a solid oxide fuel cell combined supply system integrating hydrogen energy storage and an operation strategy.

Background technique

With the rapid development and increasing share of renewable energy, instability and extreme weather conditions make the power output of renewable energy fluctuate severely, which greatly affects the stable operation of the power grid. At the same time, the installed capacity of wind power generation and photovoltaic power generation has increased rapidly. Due to the insufficient capacity of the power grid, the phenomenon of abandoning wind and light has occurred frequently. The most feasible solution to these problems is to combine renewable energy with energy storage systems. Green hydrogen energy storage has become a highly feasible, Promising solution.

Proton exchange membrane electrolyzers are widely used to produce green hydrogen due to their technical, economical advantages and faster response speed. Solid oxide fuel cells are high-efficiency power generation devices with low emissions, small size, and high flexibility. The use of traditional carbon-based fuels (methane, CO, etc.) can easily lead to carbon deposition in SOFCs, thereby affecting their operational performance.

The present invention has been made in view of this.

SUMMARY OF THE INVENTION

The purpose of this application is to provide a solid oxide fuel cell co-supply system and operation strategy with integrated hydrogen energy storage, which can solve the following technical problems: (1) to suppress the instability and fluctuation of the output of renewable energy such as solar energy and wind energy; ( 2) To store surplus power from wind power generation, photovoltaic power generation and cheap valley power; (3) To solve the problem of carbon deposition in the operation of solid oxide fuel cells; (4) To meet the energy needs of users for cooling, heating, electricity, hydrogen and oxygen.

The first object provided by this application is to provide a solid oxide fuel cell co-supply system with integrated hydrogen energy storage, the solid oxide fuel cell co-supply system with integrated hydrogen energy storage includes electrolysis of water to produce hydrogen energy storage cells The system, the solid oxide fuel cell power generation subsystem, the waste heat recovery subsystem and the absorption refrigeration/heating subsystem are connected by pipelines and valves.

The electrolyzed water hydrogen production energy storage subsystem includes: a proton exchange membrane electrolysis cell (101), a hydrogen compressor (102), a hydrogen cooler (103), a hydrogen storage tank (104), a gas-liquid separator (105), an oxygen compressor (106), an oxygen cooler (107) and an oxygen storage tank (108); the proton exchange membrane electrolysis cell (101) is powered by wind power generation and photovoltaic power generation or renewable surplus power and cheap valley electricity, The cathode outlet of the proton exchange membrane electrolysis cell (101) is connected to the inlet of the hydrogen compressor (102), the outlet of the hydrogen compressor (102) is connected to the gas side inlet of the hydrogen cooler (103), and the gas side outlet of the hydrogen cooler (103) is connected to the gas side inlet of the hydrogen cooler (103). The hydrogen storage tank (104) is connected; the anode outlet of the proton exchange membrane electrolysis cell (101) is connected to the gas-liquid separator (105), and the gas-phase outlet of the gas-liquid separator (105) is connected to the gas side inlet of the oxygen compressor (106), The liquid phase outlet of the gas-liquid separator (105) is connected to the outlet from the first feed water pump (309), the outlet of the oxygen compressor (106) is connected to the gas side inlet of the oxygen cooler (107), and the gas side outlet of the oxygen cooler (107) is connected to the gas side inlet of the oxygen cooler (107). Oxygen storage tank (108) is connected.

The solid oxide fuel cell power generation subsystem includes: a hydrogen primary preheater (201), an oxygen primary preheater (202), a hydrogen turbine (203), an oxygen turbine (204), and a hydrogen secondary preheater (205), post-combustion chamber temperature-adjusted water superheater (206), solid oxide fuel cell (207), DC-AC inverter (208), post-combustion chamber (209) and gas turbine (210); the hydrogen primary The inlet and outlet of the preheater (201) are respectively connected with the outlet of the hydrogen storage tank (104) and the inlet of the hydrogen turbine (203), and the outlet of the hydrogen turbine (203) is connected with the inlet of the hydrogen secondary preheater (205), and the hydrogen 2 The outlet of the secondary preheater (205) is connected to the anode inlet of the solid oxide fuel cell (207); the inlet and outlet of the primary oxygen preheater (202) are respectively connected to the outlet of the oxygen storage tank (108), the oxygen turbine (204) ) inlet is connected, the outlet of the oxygen turbine (204) is mixed with the oxygen at the gas side outlet of the post-combustion chamber temperature-adjusted water superheater (206) and then connected to the cathode inlet of the solid oxide fuel cell (207); the solid oxide fuel cell (207) ) The anode outlet is connected to the inlet of the post-combustion chamber (209), and the cathode outlet of the solid oxide fuel cell (207) is divided into two paths, and one path passes through the hydrogen secondary preheater (205), the hydrogen primary preheater (201), After the oxygen primary preheater (202) and the post-combustion chamber temperature-adjusted water superheater (206) are mixed with oxygen at the outlet of the oxygen turbine (204), they are connected to the cathode inlet of the solid oxide fuel cell (207); the solid oxide fuel cell (207) The other way of the cathode outlet is connected to the inlet of the after-combustion chamber (209), and the outlet of the after-combustion chamber (209) is connected to the gas side inlet of the waste heat recovery heat exchanger (303) through the gas turbine (210); the temperature-adjusting water of the after-combustion chamber is overheated The outlet of the burner (206) is connected to the inlet of the afterburner (209).

The waste heat recovery subsystem includes: a cold oil storage tank (301), a low-temperature oil pump (302), a waste heat recovery heat exchanger (303), a post-combustion chamber temperature-regulated water evaporator (304), and an adiabatic high-temperature oil storage tank (305) ), high temperature oil pump (306), post-combustion chamber tempering water preheater (307), oil-water heat exchanger (308), first feed water pump (309), first regulating valve (310), second regulating valve (311) ), heat exchanger (312), third regulating valve (313), fourth regulating valve (314), adiabatic water storage tank (315) and second feed water pump (316); the cold oil storage tank (316) 301) The outlet is connected to the inlet of the low temperature oil pump (302), and the outlet of the low temperature oil pump (302) is divided into two paths, which are respectively connected to the oil side inlets of the oxygen cooler (107) and the hydrogen cooler (103); the oxygen cooler (107) and the After the oil side outlet of the hydrogen cooler (103) is mixed, it is connected to the inlet of the adiabatic high temperature oil storage tank (305) through the waste heat recovery heat exchanger (303) and the post-combustion chamber tempering water evaporator (304); the adiabatic high temperature oil storage tank (305) The outlet is connected to the inlet of the high temperature oil pump (306), the outlet of the high temperature oil pump (306) is connected to the oil side inlet of the high pressure generator (401), and the oil side outlet of the high pressure generator (401) is connected to the rear combustion chamber temperature-adjusting water preheater (307) ) oil-side inlet, the oil-side outlet of the post-combustion chamber tempering water preheater (307) is connected to the oil-side inlet of the oil-water heat exchanger (308), and the oil-side outlet of the oil-water heat exchanger (308) is connected to the cold oil storage tank (301) ) inlet; the gas side outlet of the waste heat recovery heat exchanger (303) is connected to the inlet of the first regulating valve (310) and the second regulating valve (311), and the outlet of the first regulating valve (310) is connected to the gas side of the low pressure generator (402). The inlet is connected, and the gas side outlet of the low pressure generator (402) is connected with the adiabatic water storage tank (315) through the fourth regulating valve (314); the outlet of the second regulating valve (311) is connected by the heat exchanger (312), the third regulating valve (313) is connected to the adiabatic water storage tank (315); the outlet of the adiabatic water storage tank (315) is divided into two paths, one of which is mixed with the liquid phase outlet of the gas-liquid separator (105) through the first feed pump (309), and then enters the The anode inlet of the proton exchange membrane electrolysis cell (101) passes through the second feed water pump (316), the post-combustion chamber temperature-adjusting water preheater (307) and the post-combustion chamber temperature-adjusting water evaporator (304), and is connected to the post-combustion chamber. The inlet of the tempering water superheater (206) is connected.

The waste heat recovery subsystem uses heat-conducting oil as a heat-exchanging working medium.

The absorption refrigeration/heating subsystem includes: a high pressure generator (401), a low pressure generator (402), a condenser (403), an evaporator (404), an absorber (405), and a low temperature heat exchanger (406) ), high temperature heat exchanger (407), fifth regulating valve (408), sixth regulating valve (409), seventh regulating valve (411), eighth regulating valve (412), cooling tower (410), first a throttle valve (413), a second throttle valve (414), a first solution pump (415), a second solution pump (416), a third throttle valve (417) and a fourth throttle valve (418); The gas phase outlet of the high pressure generator (401) is connected to the inlet of the condenser (403) through the low pressure generator (402) and the first throttle valve (413), and the outlet of the condenser (403) is connected to the inlet of the condenser (403) through the fourth throttle valve (418). The inlet of the evaporator (404) is connected, and the outlet of the evaporator (404) is connected to the inlet of the absorber (405). It is connected to the inlet of the low pressure generator (402), and the other way is connected to the inlet of the high pressure generator (401) after passing through the second solution pump (416) and the high temperature heat exchanger (407). The heat exchanger (407) and the second throttle valve (414) are connected to the inlet of the low pressure generator (402); the liquid phase outlet of the low pressure generator (402) passes through the low temperature heat exchanger (406) and the third throttle valve ( 417), it is connected to the inlet of the absorber (405); the gas phase outlet of the low pressure generator (402) is connected to the inlet of the condenser (403); the chilled water return water and chilled water supply are respectively connected to the water side inlet and outlet of the evaporator (404). connection; the outlet of the fifth regulating valve (408) is connected to the inlet of the eighth regulating valve (412) after passing through the absorber (405) and the condenser (403); the outlet of the sixth regulating valve (409) is passing through the absorber (405), the condenser (403) The device (403) is connected to the inlet of the seventh regulating valve (411), the outlet of the seventh regulating valve (411) is connected to the inlet of the cooling tower (410), and the outlet of the cooling tower (410) is connected to the inlet of the sixth regulating valve (409).

The second objective of the present application is to provide an operation strategy of a solid oxide fuel cell co-supply system integrating hydrogen energy storage, including the following contents:

In order to meet the cooling load and heating load demand in different seasons, the absorption cooling/heating subsystem (4) and the heat exchanger (312) are operated by regulating valves to switch the heating or cooling mode.

In summer, the first regulating valve (310), the fourth regulating valve (314), the sixth regulating valve (409) and the seventh regulating valve (411) are opened, the second regulating valve (311), the third regulating valve (313) ), the fifth regulating valve (408) and the eighth regulating valve (412) are closed; the absorption cooling/heating subsystem operates in cooling mode, and the exhaust gas of the gas turbine (210) is cooled by the waste heat recovery heat exchanger (303) Sent to a low pressure generator (402) to produce more chilled water.

In the transition season, in order to meet the cooling and heating demands at the same time, the first regulating valve (310) and the fourth regulating valve (314) are closed, the second regulating valve (311) and the third regulating valve (313) are opened, and the sixth regulating valve (310) and the third regulating valve (313) are opened. The valve (409) and the seventh regulating valve (411) are opened, and the fifth regulating valve (408) and the eighth regulating valve (412) are closed; the exhaust gas of the gas turbine (210) is cooled by the waste heat recovery heat exchanger (303) and then enters the heat exchanger. The heater (312) produces heating water; the absorption cooling/heating subsystem operates in cooling mode, producing chilled water.

In order to meet more heating demands in winter, the first regulating valve (310) and the fourth regulating valve (314) are closed, the second regulating valve (311) and the third regulating valve (313) are opened, and the sixth regulating valve (409) ) and the seventh regulating valve (411) are closed, the fifth regulating valve (408) and the eighth regulating valve (412) are opened; the exhaust gas of the gas turbine (210) is cooled by the waste heat recovery heat exchanger (303) and then enters the heat exchanger ( 312) Produce heating water; the absorption cooling/heating subsystem operates in heating mode to produce heating water.

The above invention can effectively suppress the unstable and fluctuating output of renewable energy such as solar energy and wind energy; can store wind power, photovoltaic power, and cheap valley power; can solve the problem of carbon deposition in the operation of solid oxide fuel cells; According to the needs of users, it can flexibly supply cold, hot and electric energy.

Description of drawings

Figure 1 is a schematic diagram of a solid oxide fuel cell co-supply system integrating hydrogen energy storage;

Detailed ways

The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

As shown in FIG. 1 , the first object of the present invention is to provide a solid oxide fuel cell co-supply system integrating hydrogen energy storage, and the solid oxide fuel cell co-supply system integrating hydrogen energy storage includes electrolyzed water. Hydrogen production energy storage subsystem, solid oxide fuel cell power generation subsystem, waste heat recovery subsystem and absorption refrigeration/heating subsystem, the subsystems are connected through pipelines and valves.

The hydrogen production energy storage subsystem (1) by electrolysis of water includes: a proton exchange membrane electrolysis cell (101), a hydrogen compressor (102), a hydrogen cooler (103), a hydrogen storage tank (104), and a gas-liquid separator (105) , oxygen compressor (106), oxygen cooler (107) and oxygen storage tank (108); the proton exchange membrane electrolysis cell (101) is powered by wind power and photovoltaic power generation or renewable surplus power and cheap valley electricity , the cathode outlet of the proton exchange membrane electrolysis cell (101) is connected to the inlet of the hydrogen compressor (102), the outlet of the hydrogen compressor (102) is connected to the gas side inlet of the hydrogen cooler (103), and the gas side outlet of the hydrogen cooler (103) is connected with the hydrogen storage tank (104); the anode outlet of the proton exchange membrane electrolysis cell (101) is connected with the gas-liquid separator (105), and the gas-phase outlet of the gas-liquid separator (105) is connected with the gas side inlet of the oxygen compressor (106) , the liquid phase outlet of the gas-liquid separator (105) is connected to the outlet from the first feed pump (309), the outlet of the oxygen compressor (106) is connected to the gas side inlet of the oxygen cooler (107), and the gas side outlet of the oxygen cooler (107) Connect to the oxygen storage tank (108).

The solid oxide fuel cell power generation subsystem includes: a hydrogen primary preheater (201), an oxygen primary preheater (202), a hydrogen turbine (203), an oxygen turbine (204), and a hydrogen secondary preheater (205) ), post-combustion chamber temperature-adjusted water superheater (206), solid oxide fuel cell (207), DC-AC inverter (208), post-combustion chamber (209) and gas turbine (210); the hydrogen is preheated once The inlet and outlet of the device (201) are respectively connected with the outlet of the hydrogen storage tank (104) and the inlet of the hydrogen turbine (203), and the outlet of the hydrogen turbine (203) is connected with the inlet of the hydrogen secondary preheater (205), and the hydrogen secondary preheater is connected to the inlet of the hydrogen secondary preheater (205). The outlet of the heater (205) is connected to the anode inlet of the solid oxide fuel cell (207); the inlet and outlet of the oxygen primary preheater (202) are respectively connected to the outlet of the oxygen storage tank (108) and the inlet of the oxygen turbine (204) connected, the outlet of the oxygen turbine (204) is mixed with the oxygen from the gas side outlet of the post-combustion chamber tempering water superheater (206) and then connected to the cathode inlet of the solid oxide fuel cell (207); the anode of the solid oxide fuel cell (207) The outlet is connected to the inlet of the post-combustion chamber (209), and the cathode outlet of the solid oxide fuel cell (207) is divided into two paths, and one path sequentially passes through the hydrogen secondary preheater (205), the hydrogen primary preheater (201), and the oxygen primary After the preheater (202) and the post-combustion chamber temperature-adjusted water superheater (206) are mixed with the oxygen at the outlet of the oxygen turbine (204), they are connected to the cathode inlet of the solid oxide fuel cell (207); the solid oxide fuel cell (207) ) The other way of the cathode outlet is connected to the inlet of the post-combustion chamber (209), and the outlet of the post-combustion chamber (209) is connected to the gas side inlet of the waste heat recovery heat exchanger (303) through the gas turbine (210); 206) outlet is connected to the inlet of the afterburner (209).

The unreacted oxygen at the cathode outlet of the solid oxide fuel cell (207) is divided into two paths, and the oxygen amount of the preheated hydrogen, oxygen and temperature-adjusting water in one path is calculated according to the energy balance of the solid oxide fuel cell (207) to ensure that the fuel The battery runs stably; the other way is to perform stoichiometric calculation according to the amount of unreacted hydrogen at the anode outlet of the solid oxide fuel cell (207) to ensure complete reaction with hydrogen after entering the post-combustion chamber.

The waste heat recovery subsystem includes: a cold oil storage tank (301), a low temperature oil pump (302), a waste heat recovery heat exchanger (303), a post-combustion chamber tempering water evaporator (304), an adiabatic high temperature oil storage tank (305), High temperature oil pump (306), post-combustion chamber tempering water preheater (307), oil-water heat exchanger (308), first feed water pump (309), first regulating valve (310), second regulating valve (311), a heat exchanger (312), a third regulating valve (313), a fourth regulating valve (314), an adiabatic water storage tank (315) and a second feed water pump (316); the cold oil storage tank (301) The outlet is connected to the inlet of the cryogenic oil pump (302), and the outlet of the cryogenic oil pump (302) is divided into two paths, which are respectively connected to the oil side inlets of the oxygen cooler (107) and the hydrogen cooler (103); the oxygen cooler (107) and the hydrogen cooling After the oil side outlet of the heat exchanger (103) is mixed, it is connected to the inlet of the adiabatic high temperature oil storage tank (305) through the waste heat recovery heat exchanger (303) and the post-combustion chamber tempering water evaporator (304); the adiabatic high temperature oil storage tank (305) ) outlet is connected to the inlet of the high temperature oil pump (306), the outlet of the high temperature oil pump (306) is connected to the oil side inlet of the high pressure generator (401), and the oil side outlet of the high pressure generator (401) is connected to the rear combustion chamber tempering water preheater (307) oil The side inlet, the oil side outlet of the post-combustion chamber tempering water preheater (307) is connected to the oil side inlet of the oil-water heat exchanger (308), and the oil side outlet of the oil-water heat exchanger (308) is connected to the inlet of the cold oil storage tank (301). ; The gas side outlet of the waste heat recovery heat exchanger (303) is connected to the inlet of the first regulating valve (310) and the second regulating valve (311), and the outlet of the first regulating valve (310) is connected to the gas side inlet of the low pressure generator (402). , the gas side outlet of the low pressure generator (402) is connected to the adiabatic water storage tank (315) through the fourth regulating valve (314); the outlet of the second regulating valve (311) is connected to the heat exchanger (312), the third regulating valve (313) ) is connected to the adiabatic water storage tank (315); the outlet of the adiabatic water storage tank (315) is divided into two paths, one of which is mixed with the liquid phase outlet of the gas-liquid separator (105) through the first feed pump (309), and then enters the proton exchange The anode inlet of the membrane electrolysis cell (101) passes through the second feed water pump (316), the post-combustion chamber temperature-adjusting water preheater (307) and the after-combustion chamber temperature-adjusting water evaporator (304), and then passes through the post-combustion chamber temperature-adjusting water evaporator (304). Superheater (206) inlet connection.

The waste heat recovery subsystem uses heat-conducting oil as a heat-exchanging working medium.

The absorption refrigeration/heating subsystem includes: a high pressure generator (401), a low pressure generator (402), a condenser (403), an evaporator (404), an absorber (405), a low temperature heat exchanger (406), High temperature heat exchanger (407), fifth regulating valve (408), sixth regulating valve (409), seventh regulating valve (411), eighth regulating valve (412), cooling tower (410), first throttle valve (413), second throttle valve (414), first solution pump (415), second solution pump (416), third throttle valve (417) and fourth throttle valve (418); high pressure generation The gas phase outlet of the condenser (401) is connected to the inlet of the condenser (403) through the low pressure generator (402) and the first throttle valve (413), and the outlet of the condenser (403) is connected to the evaporator through the fourth throttle valve (418). (404) The inlet is connected, the outlet of the evaporator (404) is connected to the inlet of the absorber (405), and the absorber (405) is divided into two paths after the first solution pump (415) and the low temperature heat exchanger (406), and one path is connected to the low pressure The inlet of the generator (402) is connected, and the other path is connected to the inlet of the high-pressure generator (401) after passing through the second solution pump (416) and the high-temperature heat exchanger (407); the liquid-phase outlet of the high-pressure generator (401) is subjected to high-temperature heat exchange connected to the inlet of the low pressure generator (402); the liquid phase outlet of the low pressure generator (402) passes through the low temperature heat exchanger (406) and the third throttle valve (417) Then, it is connected with the inlet of the absorber (405); the gas phase outlet of the low pressure generator (402) is connected with the inlet of the condenser (403); the chilled water return water and the chilled water supply are respectively connected with the water side inlet and outlet of the evaporator (404); The outlet of the fifth regulating valve (408) is connected to the inlet of the eighth regulating valve (412) after passing through the absorber (405) and the condenser (403); the outlet of the sixth regulating valve (409) is passing through the absorber (405) and the condenser ( 403) is connected to the inlet of the seventh regulating valve (411), the outlet of the seventh regulating valve (411) is connected to the inlet of the cooling tower (410), and the outlet of the cooling tower (410) is connected to the inlet of the sixth regulating valve (409).

The second object of the present invention is to provide an operation strategy of a solid oxide fuel cell co-supply system integrating hydrogen energy storage, which is characterized in that it includes the following contents:

In order to meet the cooling load and heating load demand in different seasons, the absorption cooling/heating subsystem (4) and the heat exchanger (312) are operated by regulating valves to switch the heating or cooling mode.

In summer, the first regulating valve (310), the fourth regulating valve (314), the sixth regulating valve (409) and the seventh regulating valve (411) are opened, the second regulating valve (311), the third regulating valve (313) ), the fifth regulating valve (408) and the eighth regulating valve (412) are closed; the absorption cooling/heating subsystem operates in cooling mode, and the exhaust gas of the gas turbine (210) is cooled by the waste heat recovery heat exchanger (303) Sent to a low pressure generator (402) to produce more chilled water.

In the transition season, in order to meet the cooling and heating demands at the same time, the first regulating valve (310) and the fourth regulating valve (314) are closed, the second regulating valve (311) and the third regulating valve (313) are opened, and the sixth regulating valve (310) and the third regulating valve (313) are opened. The valve (409) and the seventh regulating valve (411) are opened, and the fifth regulating valve (408) and the eighth regulating valve (412) are closed; the exhaust gas of the gas turbine (210) is cooled by the waste heat recovery heat exchanger (303) and then enters the heat exchanger. The heater (312) produces heating water; the absorption cooling/heating subsystem operates in cooling mode, producing chilled water.

In winter, the first regulating valve (310) and the fourth regulating valve (314) are closed, the second regulating valve (311) and the third regulating valve (313) are opened, and the sixth regulating valve (409) and the seventh regulating valve ( 411) is closed, the fifth regulating valve (408) and the eighth regulating valve (412) are opened; the exhaust gas of the gas turbine (210) is cooled by the waste heat recovery heat exchanger (303) and then enters the heat exchanger (312) to produce heating water; The cooling/heating subsystem operates in heating mode, producing heating water.

The application objects of this system are building distributed energy systems, park distributed energy systems, distributed energy storage systems, etc.

The effect of the present invention will be described below with reference to a specific example. To compare the performance differences under different strategies, the total input energy under different strategies is set constant.

Table 1 Thermodynamic performance of the system under different operating strategies

效率(44.47％)大于夏季(43.85％)，因为供暖热水的

值大于冷冻水的

值。因此，冬季的

效率全年最高，分别比夏季和过渡期高1.73％和1.11％。It can be seen from Table 1 that the energy efficiency of the co-supply system in summer, transition period and winter is 82.61%, 79.36% and 87.30% respectively. On the contrary, the transition season

The efficiency (44.47%) is greater than that in summer (43.85%) because the heating water

value greater than that of chilled water

value. Therefore, the winter

Efficiency is highest throughout the year, 1.73% and 1.11% higher than summer and transition periods, respectively.

The above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them. All equivalent structural transformations made by using the contents of the description and drawings of the present invention, which are directly or indirectly used in other related technical fields, are similarly included in the protection scope of the present invention.

Claims (6)

1. a solid oxide fuel cell co-supply system integrating hydrogen energy storage and operation strategy, it is characterized in that, described solid oxide fuel cell co-supply system comprises electrolyzed water hydrogen production energy storage subsystem (1), solid An oxide fuel cell power generation subsystem (2), a waste heat recovery subsystem (3) and an absorption cooling/heating subsystem (4), wherein the subsystems are connected through pipelines and valves. 2 . The solid oxide fuel cell co-supply system and operation strategy integrating hydrogen energy storage according to claim 1 , wherein the electrolyzed water hydrogen production energy storage subsystem (1) comprises: a proton exchange membrane Electrolytic cell (101), hydrogen compressor (102), hydrogen cooler (103), hydrogen storage tank (104), gas-liquid separator (105), oxygen compressor (106), oxygen cooler (107) and oxygen Storage tank (108); the proton exchange membrane electrolysis cell (101) is powered by wind power generation and photovoltaic power generation or renewable surplus power and cheap valley electricity, and the cathode outlet of the proton exchange membrane electrolysis cell (101) is connected with hydrogen compression The inlet of the machine (102) is connected, the outlet of the hydrogen compressor (102) is connected to the gas side inlet of the hydrogen cooler (103), and the gas side outlet of the hydrogen cooler (103) is connected to the hydrogen storage tank (104); the proton exchange membrane electrolysis cell (101) The anode outlet is connected to the gas-liquid separator (105), the gas-phase outlet of the gas-liquid separator (105) is connected to the gas-side inlet of the oxygen compressor (106), and the liquid-phase outlet of the gas-liquid separator (105) is connected to the gas-liquid separator (105) from the first feed The outlet of the water pump (309) is connected, the outlet of the oxygen compressor (106) is connected to the gas side inlet of the oxygen cooler (107), and the gas side outlet of the oxygen cooler (107) is connected to the oxygen storage tank (108). 3. A solid oxide fuel cell co-supply system and operation strategy integrating hydrogen energy storage according to claim 1, wherein the solid oxide fuel cell power generation subsystem (2) comprises: a hydrogen primary pre- Heater (201), Oxygen Primary Preheater (202), Hydrogen Turbine (203), Oxygen Turbine (204), Hydrogen Secondary Preheater (205), After Combustion Chamber Temperature Control Water Superheater (206), A solid oxide fuel cell (207), a DC-AC inverter (208), a post-combustion chamber (209) and a gas turbine (210); the inlet and outlet of the hydrogen primary preheater (201) are respectively connected with the hydrogen storage tank ( 104) The outlet and the inlet of the hydrogen turbine (203) are connected, the outlet of the hydrogen turbine (203) is connected with the inlet of the hydrogen secondary preheater (205), and the outlet of the hydrogen secondary preheater (205) is connected with the solid oxide fuel cell ( 207) The anode inlet is connected; the inlet and outlet of the oxygen primary preheater (202) are respectively connected with the outlet of the oxygen storage tank (108) and the inlet of the oxygen turbine (204), and the outlet of the oxygen turbine (204) is connected with the afterburner The oxygen at the gas side outlet of the temperature-adjusting water superheater (206) is mixed and then connected to the cathode inlet of the solid oxide fuel cell (207); the anode outlet of the solid oxide fuel cell (207) is connected to the inlet of the post-combustion chamber (209), and the solid oxide fuel cell (207) anode outlet is connected to the inlet of the post-combustion chamber (209). The cathode outlet of the fuel cell (207) is divided into two paths, and one path passes through the hydrogen secondary preheater (205), the hydrogen primary preheater (201), the oxygen primary preheater (202) and the post-combustion chamber temperature adjustment water in sequence After the oxygen is mixed at the outlet of the oxygen turbine (206) and the oxygen turbine (204), the cathode inlet of the solid oxide fuel cell (207) is connected; the other way of the cathode outlet of the solid oxide fuel cell (207) is connected with the afterburner (209) The inlet is connected, and the outlet of the post-combustion chamber (209) is connected to the gas side inlet of the waste heat recovery heat exchanger (303) through the gas turbine (210); 4. The solid oxide fuel cell co-supply system and operation strategy integrating hydrogen energy storage according to claim 1, wherein the waste heat recovery subsystem (3) comprises: a cold oil storage tank (301) ), low temperature oil pump (302), waste heat recovery heat exchanger (303), post-combustion chamber tempering water evaporator (304), adiabatic high temperature oil storage tank (305), high temperature oil pump (306), post-combustion chamber tempering water preheating (307), oil-water heat exchanger (308), first feed pump (309), first regulating valve (310), second regulating valve (311), heat exchanger (312), third regulating valve (313) ), the fourth regulating valve (314), the adiabatic water storage tank (315) and the second feed water pump (316); the outlet of the cold oil storage tank (301) is connected to the inlet of the low temperature oil pump (302), and the low temperature oil pump ( 302) The outlet is divided into two paths, which are respectively connected to the oil side inlets of the oxygen cooler (107) and the hydrogen cooler (103); after the oxygen cooler (107) and the oil side outlet of the hydrogen cooler (103) are mixed, the residual heat The recovery heat exchanger (303) and the post-combustion chamber tempering water evaporator (304) are connected to the inlet of the adiabatic high temperature oil storage tank (305); the outlet of the adiabatic high temperature oil storage tank (305) is connected to the inlet of the high temperature oil pump (306), and the high temperature oil pump ( 306) The outlet is connected to the oil side inlet of the high pressure generator (401), and the oil side outlet of the high pressure generator (401) is connected to the oil side inlet of the post-combustion chamber tempering water preheater (307), and the post-combustion chamber tempering water preheater (307) ) The oil side outlet is connected to the oil side inlet of the oil-water heat exchanger (308), the oil side outlet of the oil-water heat exchanger (308) is connected to the inlet of the cold oil storage tank (301); the gas side outlet of the waste heat recovery heat exchanger (303) is connected to the The inlet of the first regulating valve (310) and the second regulating valve (311) are connected, the outlet of the first regulating valve (310) is connected with the gas side inlet of the low pressure generator (402), and the gas side outlet of the low pressure generator (402) is connected through the fourth The regulating valve (314) is connected with the thermal insulation water storage tank (315); the outlet of the second regulating valve (311) is connected with the thermal insulation water storage tank (315) through the heat exchanger (312) and the third regulating valve (313); The outlet of the water tank (315) is divided into two paths, one path is mixed with the liquid phase outlet of the gas-liquid separator (105) through the first feed pump (309), and then enters the anode inlet of the proton exchange membrane electrolysis cell (101), and the other path passes through the The second feed water pump (316), the post-combustion chamber tempering water preheater (307) and the post-combustion chamber tempering water evaporator (304) are connected to the inlet of the post-combustion chamber tempering water superheater (206). The waste heat recovery subsystem uses heat-conducting oil as a heat-exchanging working medium. 5. The solid oxide fuel cell co-supply system and operation strategy integrating hydrogen energy storage according to claim 1, wherein the absorption refrigeration/heating subsystem (4) comprises: a high-voltage generator (401), low pressure generator (402), condenser (403), evaporator (404), absorber (405), low temperature heat exchanger (406), high temperature heat exchanger (407), fifth regulating valve ( 408), sixth regulating valve (409), seventh regulating valve (411), eighth regulating valve (412), cooling tower (410), first throttle valve (413), second throttle valve (414) , the first solution pump (415), the second solution pump (416), the third throttle valve (417) and the fourth throttle valve (418); the gas phase outlet of the high pressure generator (401) passes through the low pressure generator (402) , The first throttle valve (413) is connected to the inlet of the condenser (403), the outlet of the condenser (403) is connected to the inlet of the evaporator (404) after passing through the fourth throttle valve (418), and the outlet of the evaporator (404) is connected The inlet of the absorber (405), the absorber (405) is divided into two paths after passing through the first solution pump (415) and the low temperature heat exchanger (406), one path is connected to the inlet of the low pressure generator (402), and the other path is connected to the inlet of the low pressure generator (402) The solution pump (416) and the high temperature heat exchanger (407) are connected to the inlet of the high pressure generator (401); the liquid phase outlet of the high pressure generator (401) passes through the high temperature heat exchanger (407) and the second throttle valve (414) After that, it is connected to the inlet of the low pressure generator (402); the liquid phase outlet of the low pressure generator (402) is connected to the inlet of the absorber (405) after passing through the low temperature heat exchanger (406) and the third throttle valve (417); The gas phase outlet of the evaporator (402) is connected to the inlet of the condenser (403); the chilled water return water and the chilled water supply are respectively connected to the water side inlet and outlet of the evaporator (404); the outlet of the fifth regulating valve (408) passes through the absorber (405). ) and the condenser (403) are connected to the inlet of the eighth regulating valve (412); the outlet of the sixth regulating valve (409) is connected to the inlet of the seventh regulating valve (411) after passing through the absorber (405) and the condenser (403). , the outlet of the seventh regulating valve (411) is connected to the inlet of the cooling tower (410), and the outlet of the cooling tower (410) is connected to the inlet of the sixth regulating valve (409). 6. The solid oxide fuel cell co-supply system and operation strategy integrating hydrogen energy storage according to any one of claims 1-5, characterized in that, comprising the following content: In order to meet the cooling load and heating load demand in different seasons, the absorption cooling/heating subsystem (4) and the heat exchanger (312) are operated by regulating valves to switch the heating or cooling mode. In summer, the first regulating valve (310), the fourth regulating valve (314), the sixth regulating valve (409) and the seventh regulating valve (411) are opened, the second regulating valve (311), the third regulating valve (313) ), the fifth regulating valve (408) and the eighth regulating valve (412) are closed; the absorption cooling/heating subsystem operates in cooling mode, and the exhaust gas of the gas turbine (210) is cooled by the waste heat recovery heat exchanger (303) Sent to a low pressure generator (402) to produce more chilled water. In the transition season, in order to meet the cooling and heating demands at the same time, the first regulating valve (310) and the fourth regulating valve (314) are closed, the second regulating valve (311) and the third regulating valve (313) are opened, and the sixth regulating valve (310) and the third regulating valve (313) are opened. The valve (409) and the seventh regulating valve (411) are opened, and the fifth regulating valve (408) and the eighth regulating valve (412) are closed; the exhaust gas of the gas turbine (210) is cooled by the waste heat recovery heat exchanger (303) and then enters the heat exchanger. The heater (312) produces heating water; the absorption cooling/heating subsystem operates in cooling mode, producing chilled water. In winter, the first regulating valve (310) and the fourth regulating valve (314) are closed, the second regulating valve (311) and the third regulating valve (313) are opened, and the sixth regulating valve (409) and the seventh regulating valve ( 411) is closed, the fifth regulating valve (408) and the eighth regulating valve (412) are opened; the exhaust gas of the gas turbine (210) is cooled by the waste heat recovery heat exchanger (303) and then enters the heat exchanger (312) to produce heating water; The cooling/heating subsystem operates in heating mode, producing heating water.

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