CN114300705A - Fuel cell triple co-generation control system and method - Google Patents
Fuel cell triple co-generation control system and method Download PDFInfo
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Abstract
The invention relates to the technical field of fuel cells, in particular to a fuel cell triple co-generation control method and system. The fuel cell triple co-generation control system comprises a fuel cell, a heat exchanger, a heat proportion distributor and at least two heat utilization structures, wherein the fuel cell is connected with the heat utilization structures, the fuel cell is connected with each heat utilization structure through the heat proportion distributor, and the heat proportion distributor is configured to control the flow of heat energy generated by the fuel cell into each heat utilization structure according to the heat demand of a user; and a heat exchanger is arranged between the fuel cell and each heat utilization structure. The heat proportional distributor can control the flow of the heat energy generated by the fuel cell into each heat utilization structure according to the heat demand of a user, so that the waste of the heat energy of the fuel cell can be avoided, and the operation cost of the fuel cell is reduced.
Description
Technical Field
The invention relates to the technical field of fuel cells, in particular to a fuel cell triple co-generation control system and method.
Background
The fuel cell works on the principle that hydrogen and oxygen chemically react to generate electric energy and heat energy, most of the current fuel cell products directly utilize the electric energy, so that the heat energy is directly discharged to the environment as waste heat, and the process of discharging the waste heat can generate parasitic power, so that the system efficiency is further reduced.
Under the background, the combined cooling heating and power system of the fuel cell transmits the electric energy generated by the fuel cell to the power grid, and converts the generated heat energy into absorption refrigeration and heat energy of a user end to meet the cooling and heating requirements of the user, although the mode improves the comprehensive efficiency of the system. However, the demand for heat for users varies with the seasons, and heat is wasted if heat is supplied at a constant output of the fuel cell.
Therefore, a fuel cell triple co-generation control system and method are needed to solve the above technical problems.
Disclosure of Invention
The invention aims to provide a fuel cell triple co-generation control system and a method, which can operate according to output power corresponding to heat utilization requirements of different heat utilization structures and prevent heat waste.
In order to achieve the purpose, the invention adopts the following technical scheme:
the fuel cell triple co-generation control system comprises a fuel cell, a heat exchanger, a heat proportion distributor and at least two heat consuming structures, wherein the fuel cell is connected with the heat consuming structures, and the fuel cell is connected with each heat consuming structure through the heat proportion distributor, and the heat proportion distributor is configured to control the flow of heat energy generated by the fuel cell into each heat consuming structure according to the heat demand of a user; and a heat exchanger is arranged between the fuel cell and each heat utilization structure.
As a preferable technical solution of the above fuel cell triple co-generation control system, the heat proportional distributor includes a proportional-integral electric three-way regulating valve, and the fuel cells are respectively connected to the heat utilization structure through the proportional-integral electric three-way regulating valve.
As a preferable technical solution of the fuel cell triple co-generation control system, the heat proportional distributor includes a three-way valve and a proportional valve, the fuel cell is connected to the heat consuming structures through the three-way valve, and a proportional valve is further disposed between the fuel cell and each of the heat consuming structures.
As a preferable technical solution of the fuel cell triple co-generation control system, the system further comprises an auxiliary heat source structure, and the auxiliary heat source structure is connected with at least one heat utilization structure.
A fuel cell triple co-generation control method is applied to the fuel cell triple co-generation control system in any scheme, and comprises the following steps:
obtaining a seasonal operation mode after the fuel cell is started;
obtaining a total thermal power P required with a thermal structure based on a current seasonal operation modeNeed season；
Fuel cell according to total thermal power PNeed seasonThe corresponding fuel cell outputs thermal power to operate so as to meet the thermal energy requirements of different thermal structures.
As a preferable aspect of the fuel cell triple co-generation control method, the seasonal operation mode includes a summer operation mode, a spring/autumn operation mode, and a winter operation mode.
As a preferable technical solution of the above fuel cell triple co-generation control method, the number of the heat utilization structures is three, and the three heat utilization structures are respectively a heat storage water tank, a heater and a lithium bromide refrigerator, wherein the heat power required by the heat storage water tank is PHeat storage requirementThe heating power required by the heater is PHeating systemThe lithium bromide refrigerator needs heat power PSystem for making Cold Need to。
As a preferable technical solution of the above-mentioned fuel cell triple co-generation control method, the total thermal power P required in the summer operation modeSummer need＝PHeat storage requirement+PNeed for refrigeration(ii) a The total thermal power P required in the spring/autumn running modeNeed in spring and autumn＝PHeat storage requirementAnd the total heat required in the winter modeRate PIn winter＝PHeat storage requirement+PHeating system。
As a preferable technical scheme of the fuel cell triple co-generation control method, P is obtainedNeed seasonThe magnitude relation between the thermal power limit of the fuel cell and the PNeed seasonThe magnitude relation with the thermal power limit value of the fuel cell and the mapping relation between the execution modes determine and acquire PNeed seasonAn execution mode corresponding to a magnitude relationship between the fuel cell thermal power limits.
As a preferable technical solution of the above fuel cell triple-supply control method, the thermal power limit of the fuel cell comprises the maximum thermal power P of the fuel cellFCmaxAnd minimum thermal power P of fuel cellFCminThe fuel cell triple co-generation control system also comprises an auxiliary heat source structure, and the obtained PNeed seasonThe execution modes corresponding to the magnitude relationship between the thermal power limits of the fuel cell include:
if PFCmax＜PNeed seasonAnd when the fuel cell runs at the maximum heat power, starting the auxiliary heat source structure at the same time, wherein the power of the auxiliary heat source structure is as follows: pAuxiliary heat source＝PNeed season-PFCmax；
If PFCmin≤PNeed season≤PFCmaxWhen it is, only the fuel cell is operated, and the fuel cell is operated according to PNeed seasonMatching corresponding power operation;
if PNeed season＜PFCminAnd when the lithium bromide refrigerator is used, the fuel cell operates at the minimum heat power, and redundant heat is dissipated by a cooling tower of the lithium bromide refrigerator.
As a preferable technical solution of the fuel cell triple co-generation control method, the target temperature of the hot water storage tank is set to TTargetThe temperature in the hot water storage tank is TWater tankThe heat-exchange efficiency of the heat exchanger is eta, the heat-consumption interval time of the user is tHeat exchanger 1The actual heat power of the user is PHeat storageThen, then
ΔT＝TTarget-TWater tank；
QHeat storage tank＝C×m×ΔT；
PHeat storage＝QHeat storage/t；
PHeat storage requirement＝PHeat storage/ηHeat exchanger。
As a preferable technical solution of the above fuel cell triple co-generation control method, the actual thermal power of the heater is set to PHeating deviceThen P isHeating system＝PHeating device/ηHeat exchanger 2。
As a preferable technical solution of the above fuel cell triple co-generation control method, the actual thermal power of the lithium bromide refrigerator is set to be PRefrigeration systemThen P isNeed for refrigeration＝PRefrigeration system/ηRefrigeration system/ηHeat exchanger 3。
The invention has the beneficial effects that:
the heat proportional distributor can control the flow of the heat energy generated by the fuel cell into each heat utilization structure according to the heat demand of a user, so that the waste of the heat energy of the fuel cell can be avoided, and the operation cost of the fuel cell is reduced.
The fuel cell obtains the heat required by the heat structure to obtain the total heat power of all the heat structures, and the fuel cell operates according to the output heat power of the fuel cell corresponding to the total heat power to meet the heat energy requirements of different heat structures, so that the heat energy of the fuel cell is effectively utilized, and the waste caused by excessive heat generation of the fuel cell is prevented.
Drawings
Fig. 1 is a schematic structural diagram of a fuel cell triple co-generation control system provided by an embodiment of the invention;
FIG. 2 is a flow chart of the main steps of a fuel cell triple co-generation control method provided by the embodiment of the invention;
fig. 3 is a flowchart illustrating detailed steps of a fuel cell triple co-generation control method according to an embodiment of the present invention.
In the figure:
1. a fuel cell; 2. a heat storage water tank; 3. heating; 4. a lithium bromide refrigerator; 5. a first heat exchanger; 6. a second heat exchanger; 7. a third heat exchanger; 8. a temperature sensor; 9. a heat proportional distributor; 10. an auxiliary heat source structure; 11. a power grid; 12. a controller; 13. the valve is closed.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
The invention provides a fuel cell triple co-generation control system and method, aiming at solving the technical problem that the fuel cell in the prior art can not reasonably distribute heat energy according to the heat required by a heat utilization structure.
As shown in fig. 1, the fuel cell triple-supply control system comprises a fuel cell 1, a heat exchanger, a heat proportion distributor 9 and at least two heat consuming structures, wherein the fuel cell 1 is connected with the heat consuming structures to provide heat energy for the heat consuming structures, the fuel cell 1 is connected with an electric network 11 to provide electric energy for the electric network 11, the fuel cell 1 is connected with each heat consuming structure through the heat proportion distributor 9, and the heat proportion distributor 9 is configured to control the flow of the heat energy generated by the fuel cell 1 into each heat consuming structure according to the heat demand of a user; a heat exchanger is provided between the fuel cell 1 and each heat consuming structure. The heat proportion distributor 9 can control the flow of the heat energy generated by the fuel cell 1 into each heat utilization structure according to the heat demand of a user, so that the waste of the heat energy of the fuel cell 1 can be avoided, and the operation cost of the fuel cell 1 is reduced.
Alternatively, in an embodiment of the present invention, the heat proportional distributor 9 includes three proportional-integral electric three-way regulating valves, and the fuel cell 1 is connected to the three thermal structures through the proportional-integral electric three-way regulating valves, respectively. Wherein two export that use the thermostructure to use fuel cell jointly, and the thermostructure that uses that is connected simultaneously with this fuel cell's export is connected with a shutoff valve 13 respectively, can guarantee like this that every uses the thermostructure homoenergetic to realize effective connection with fuel cell, can so according to the heat with the actual need of thermostructure, the electronic tee bend of proportion integral adjusts the aperture, satisfies every and uses the thermal demand of thermostructure.
Alternatively, in an embodiment of the present invention, the number of the thermal structures is three, the heat proportional distributor 9 includes a three-way valve, two shut-off valves and three proportional valves, the fuel cell 1 is connected to the three thermal structures through the three-way valve, wherein the two thermal structures share one outlet of the fuel cell 1, and the thermal structures simultaneously connected to the outlet of the fuel cell 1 are respectively connected to one shut-off valve 13, so that it is ensured that each thermal structure can be effectively connected to the fuel cell 1, and a proportional valve is further disposed between the fuel cell 1 and each thermal structure. The proportional valves work in cooperation with each other, and each proportional valve works at a different opening degree according to the heat quantity required by the heat consumption structure, so that the heat consumption of each heat consumption structure is met.
In one embodiment of the present invention, the number of the thermal structures is three, the three thermal structures are the thermal storage water tank 2, the heater 3 and the lithium bromide refrigerator 4, and the thermal storage water tank 2, the heater 3 and the lithium bromide refrigerator 4 work according to seasons. In winter, the heat storage water tank 2 and the heater work for 3 times; in spring and autumn, the heat storage water tank 2 works; in summer, the heat storage water tank 2 and the lithium bromide refrigerator 4 work, so that the heat using requirements of users in different seasons can be met.
In one embodiment of the present invention, the number of the thermal structures may be two, and the two thermal structures are the hot water storage tank 2 and the heater 3, respectively.
In the embodiment of the present invention, the fuel cell triple co-generation control system further includes a controller 12, and the controller 12 is respectively connected to the fuel cell 1, the heat exchanger, the heat proportion distributor 9, and the heat exchanger, so as to realize cooperative control of the fuel cell 1, the heat exchanger, the heat proportion distributor 9, and the heat exchanger. The controller 12 may be a centralized or distributed controller 12, for example, the controller 12 may be a single-chip microcomputer or may be formed by a plurality of distributed single-chip microcomputers, and a control program may be run in the single-chip microcomputers to control each component to realize its function.
The embodiment of the invention also provides a fuel cell triple co-generation control method, as shown in fig. 2, the method comprises the following steps:
s11, obtaining a seasonal operation mode after the fuel cell 1 is started;
the seasonal operation mode can be manually adjusted by a user, namely the user manually selects the seasonal operation mode, the fuel cell triple co-generation control system controls the fuel cell 1 to work according to the seasonal operation mode selected by the user, the system has a memory function, and if the user selects the seasonal operation mode of the default check ring, the system controls the fuel cell 1 to work according to the seasonal operation mode selected by the user last time.
Of course, the seasonal operation mode at the corresponding temperature can be selected by the system according to the local temperature, so that automatic selection is realized, and the user can use heat directly.
S12, obtaining total heat power P needed by the heat structure based on the current seasonal operation modeNeed season；
The heat quantity required by each heat utilization structure is different, the corresponding heat power is different, in addition, the heat quantity required by the same heat utilization structure in different seasons is different, therefore, the total heat power PNeed seasonShould be determined on the premise of the seasonal operation mode.
S13, fuel cell 1 according to total heat power PNeed seasonThe corresponding fuel cell 1 outputs thermal power to operate to meet the thermal energy requirements of different thermal structures.
The fuel cell 1 obtains the heat required by the heat utilization structures to obtain the total heat power of all the heat utilization structures, and the fuel cell 1 outputs heat power corresponding to the total heat power to operate so as to meet the heat energy requirements of different heat utilization structures, thereby effectively utilizing the heat energy of the fuel cell 1 and preventing the waste caused by excessive heat generation of the fuel cell 1.
As described above, the number of the thermal structures is three, which are the hot water storage tank 2, the heater 3, and the lithium bromide refrigerator 4, where P isHeat storage requirementThermal power, P, required for the heat storage water tank 2Heating systemThe thermal power, P, required for the heating 3Need for refrigerationThe thermal power required for the lithium bromide refrigerator 4.
Since the user has different heat demand in different seasons, the total heat power P required in the summer operating mode is defined in this embodiment for this purposeSummer need＝PHeat storage requirement+PNeed for refrigeration(ii) a Total thermal power P required in spring/autumn mode of operationNeed in spring and autumn＝PHeat storage requirement(ii) a Total thermal power P required in winter mode of operationIn winter＝PHeat storage requirement+PHeating system。
Obtaining PNeed seasonThen, P is obtainedNeed seasonThe magnitude relation with the thermal power limit of the fuel cell 1 is based on PNeed seasonThe obtained P is determined according to the mapping relation between the thermal power limit value of the fuel cell 1 and the execution modeNeed seasonThe execution mode corresponding to the magnitude relationship between the thermal power limits of the fuel cell 1. I.e. comparing PNeed seasonAnd the thermal power limit of the fuel cell 1, thereby determining the thermal power at which the fuel cell 1 should be operated, so as to avoid waste caused by heat which cannot be used due to large heat generation of the fuel cell 1, and avoid heat generation of the fuel cell 1 being small and unable to meet the thermal demand of a user.
In the present embodiment, the thermal power limit of the fuel cell 1 comprises the maximum thermal power P of the fuel cell 1FCmaxAnd minimum thermal power P of the fuel cell 1FCminThe fuel cell triple co-generation control system further comprises an auxiliary heat source structure 10, the auxiliary heat source structure 10 can be connected with the heat storage water tank 2, and the auxiliary heat source structure 10 can also be respectively connected with the heat storage water tank 2 and the heater 3 to provide heat for the heat storage water tank 2 and the heater 3.
Acquired PNeed seasonThe execution modes corresponding to the magnitude relationship between the thermal power limits of the fuel cell 1 include:
if PFCmax＜PNeed seasonMeanwhile, the fuel cell 1 operates at the maximum thermal power, and the auxiliary heat source structure 10 is started, where the power of the auxiliary heat source structure 10 is: pAuxiliary heat source＝PNeed season-PFCmax；
This situation usually occurs in winter, when the heat consumption of the central heating 3 and the hot water storage tank 2 is large, the heat energy generated by the fuel cell 1 is not enough to meet the heat consumption requirement, so the auxiliary heat source structure 10 needs to be started to meet the heat consumption requirement of the user, and the auxiliary heat source structure 10 is an air heat source pump in the present embodiment, but may be an electric heater or a solar heat exchanger in other embodiments.
If PFCmin≤PNeed season≤PFCmaxWhen it is determined that only the fuel cell 1 is operated, the fuel cell 1 operates according toPNeed seasonMatching corresponding power operation;
this situation usually occurs in spring, autumn and summer, with the user consuming less heat, and the fuel cell 1 according to PNeed seasonThe operation is matched with the corresponding power, so that the problem that the heat generated by the fuel cell 1 operating at the maximum thermal power cannot be effectively utilized and the heat is wasted can be avoided.
If PNeed season＜PFCminWhen then the fuel cell 1 is operated with minimum thermal power, the excess heat is dissipated by the cooling tower of the lithium bromide refrigerator 4, but this situation does not substantially occur.
The heat exchanger is used for transferring the heat energy of the fuel cell 1 to the heat utilization structure, so that there is a partial heat loss when exchanging heat through the heat exchanger, therefore, when the heat required by each heat utilization structure is actually fed back to the fuel cell 1, the heat loss should be considered, and hereinafter, the manner of obtaining the heat power of different heat utilization structures is specifically described.
The number of the heat exchangers is three, and the heat exchangers are respectively a first heat exchanger 5, a second heat exchanger 6 and a third heat exchanger 7, wherein the first heat exchanger 5 is connected with the fuel cell 1 and the heat storage water tank 2, the second heat exchanger 6 is connected with the fuel cell 1 and the heater 3, and the third heat exchanger 7 is connected with the lithium bromide refrigerator 4 and the fuel cell 1.
When the thermal structure is used as the heat storage water tank 2, the target temperature of the heat storage water tank 2 is set to be TTargetThe temperature in the heat storage water tank 2 is TWater tankThe interval time of the user in the two peak periods of heat consumption is t (the two peak periods of heat consumption can be early peak and late peak), and the heat exchange efficiency of the first heat exchanger 5 is eta due to heat exchange loss of the heat exchangerHeat exchanger 1The actual heat power of the user is PHeat storageAnd then:
ΔT＝Ttarget-TWater tank；
QHeat storage＝C×m×ΔT；
PHeat storage＝QHeat storage/t；
PHeat storage requirement＝PHeat storage/ηHeat exchanger 1。
It should be noted that, in the present embodiment, the setting of the target temperature of the hot water storage tank 2 is obtained statistically by the user in the seasonal operation mode, for example, in winter, the range of the heat consumption amplitude in a cell is not too large, and the heat power required by the hot water storage tank 2 in the next peak period can be determined directly by the temperature in the hot water storage tank 2 after the hot water consumption in the previous peak period is completed and the target temperature set in the next peak period.
When the heat utilization structure is the heating system 3, the actual heating power of the heating system 3 is PHeating deviceSince the heat exchanger has heat exchange loss, the heat exchange efficiency of the second heat exchanger 6 is etaHeat exchanger 2The heating power P required by the heater 3Heating system＝PHeating device/ηHeat exchangeDevice for cleaning the skin2。
Actual heating power P for the heater 3Heating deviceThe method can be obtained through a heat supply station, the heat supply amount required by the heat supply station for each temperature interval is relatively constant, the temperature interval is set by the heat supply station, for example, 5 ℃ is an interval, 10 ℃ below zero is an interval, 5 ℃ below zero is an interval, 0 ℃ below zero is an interval, 5 ℃ below zero is an interval, 10 ℃ below zero is an interval, so that the heat supply station can determine the heat power required by a day according to the forecast weather temperature interval of the day.
When the lithium bromide refrigerator 4 is thermally structured, the fuel cell 1 supplies heat energy to the lithium bromide refrigerator 4, and the actual heat power of the lithium bromide refrigerator 4 is set to be PRefrigeration systemSince the heat exchanger has heat exchange loss, the heat exchange efficiency of the third heat exchanger 7 is etaHeat exchanger 3Then P isNeed for refrigeration＝PRefrigeration system/ηRefrigeration system/ηHeat exchanger 3。
Actual thermal power P for lithium bromide refrigerator 4Refrigeration systemCan be obtained by the cold load demand of the lithium bromide and according to the cold load and the actual heat power P used by the lithium bromide refrigerator 4Refrigeration systemThe efficiency ratio between obtains the actual thermal power used by the lithium bromide refrigerator 4.
As shown in fig. 3, the method for controlling the triple co-generation of the fuel cell specifically comprises the following steps:
s21, starting the fuel cell 1;
s22, obtaining a seasonal operation mode;
s23, obtaining the total heat power P required by the heat application structure corresponding to the current seasonal operation modeNeed season；
S24, judgment PFCmax＜PNeed seasonIf yes, executing S25, otherwise executing S26;
s25, the fuel cell 1 is operated with maximum thermal power, while the auxiliary heat source structure 10 is activated;
s26, judgment PFCmin≤PNeed season≤PFCmaxIf yes, executing S27, otherwise executing S28;
s27, operating only the fuel cell 1, the fuel cell 1 according to PNeed seasonMatching corresponding power operation;
s28, the fuel cell 1 is operated with minimum thermal power and excess heat is dissipated by the cooling tower of the lithium bromide refrigerator 4.
The fuel cell triple co-generation control method provided by the invention determines the total thermal power required by the thermal structure according to the operation modes in different seasons, and the fuel cell 1 operates at the matched power according to the total thermal power, so that the heat generated by the fuel cell 1 can be ensured not to be wasted, and the heat energy can be generated according to the actual requirement.
In addition, the foregoing is only the preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A fuel cell triple co-generation control system, characterized by comprising a fuel cell (1), a heat exchanger, a heat proportion distributor (9) and at least two heat consuming structures, wherein the fuel cell (1) is connected with the heat consuming structures, and the fuel cell (1) is connected with each heat consuming structure through the heat proportion distributor (9), and the heat proportion distributor (9) is configured to control the flow of heat energy generated by the fuel cell (1) into each heat consuming structure according to the heat demand of a user; and a heat exchanger is arranged between the fuel cell (1) and each heat utilization structure.
2. The fuel cell triple co-generation control system according to claim 1, characterized in that the heat proportional distributor (9) comprises proportional-integral electric three-way regulating valves, through which the fuel cells (1) are respectively connected with the heat consuming structures.
3. The fuel cell triple co-generation control system according to claim 1, characterized in that the heat proportional distributor (9) comprises a three-way valve and a proportional valve, the fuel cell (1) is connected with the heat consuming structures through the three-way valve, and a proportional valve is further arranged between the fuel cell (1) and each heat consuming structure.
4. The fuel cell cogeneration control system of claim 1, further comprising an auxiliary heat source structure (10), said auxiliary heat source structure (10) being connected to at least one of said heat consuming structures.
5. A fuel cell co-generation control method applied to the fuel cell co-generation control system according to any one of claims 1 to 4, characterized by comprising the steps of:
after the fuel cell (1) is started, obtaining a seasonal operation mode;
obtaining a total thermal power P required with a thermal structure based on a current seasonal operation modeNeed season；
The fuel cell (1) is operated according to the total thermal power PNeed seasonThe corresponding fuel cell (1) outputs thermal power to operate so as to meet the thermal energy requirements of different thermal structures.
6. The fuel cell co-generation control method according to claim 5, wherein the seasonal operation mode includes a summer operation mode, a spring/fall operation mode, and a winter operation mode.
7. The triple co-generation control method of the fuel cell according to claim 6, wherein the number of the thermal structures is three, and the thermal structures are respectively a thermal storage water tank (2), a heater (3) and a lithium bromide refrigerator (4), wherein the thermal power required by the thermal storage water tank (2) is PHeat storage requirementThe heating power required by the heater (3) is PHeating systemThe lithium bromide refrigerator (4) needs heat power PNeed for refrigeration。
8. The fuel cell co-generation control method according to claim 7, wherein the total thermal power P required in the summer operation modeSummer need＝PHeat storage requirement+PNeed for refrigeration(ii) a The total thermal power P required in the spring/autumn running modeNeed in spring and autumn＝PHeat storage requirementAnd the total thermal power P required in the winter mode of operationIn winter＝PHeat storage requirement+PHeating system。
9. The fuel cell tri-generation control method according to claim 7, characterized in that P is obtainedNeed seasonThe magnitude relation with the thermal power limit of the fuel cell (1) is based on PNeed seasonDetermining and acquiring P according to the magnitude relation with the thermal power limit value of the fuel cell (1) and the mapping relation between the execution modesNeed seasonAnd an execution mode corresponding to the magnitude relation between the thermal power limits of the fuel cell (1).
10. The fuel cell co-generation control method according to claim 7, characterized in that the fuel cell (1) thermal power limit comprises a fuel cell (1) maximum thermal power PmaxFCmaxAnd minimum thermal power P of the fuel cell (1)FCminThe fuel cell triple co-generation control system also comprises an auxiliary heat source structure (10) and the obtainedPNeed seasonThe execution modes corresponding to the magnitude relation between the thermal power limits of the fuel cell (1) include:
if PFCmax＜PNeed seasonAnd when the fuel cell (1) is operated at the maximum heat power, starting the auxiliary heat source structure (10), wherein the power of the auxiliary heat source structure (10) is as follows: pAuxiliary heat source＝PNeed season-PFCmax；
If PFCmin≤PNeed season≤PFCmaxWhen the power is required to be matched, only the fuel cell (1) works, and the fuel cell (1) needs to be matched with corresponding power to operate according to the season P;
if PNeed season＜PFCminAnd meanwhile, the fuel cell (1) runs at the minimum thermal power, and redundant heat is dissipated by a cooling tower of the lithium bromide refrigerator.
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