CN118564344A - Distributed cooling, heating and power cogeneration system and control method based on gas-heat joint control - Google Patents
Distributed cooling, heating and power cogeneration system and control method based on gas-heat joint control Download PDFInfo
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- CN118564344A CN118564344A CN202410649777.4A CN202410649777A CN118564344A CN 118564344 A CN118564344 A CN 118564344A CN 202410649777 A CN202410649777 A CN 202410649777A CN 118564344 A CN118564344 A CN 118564344A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
- F02C6/18—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use using the waste heat of gas-turbine plants outside the plants themselves, e.g. gas-turbine power heat plants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
- F02C6/14—Gas-turbine plants having means for storing energy, e.g. for meeting peak loads
- F02C6/16—Gas-turbine plants having means for storing energy, e.g. for meeting peak loads for storing compressed air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B27/00—Machines, plants or systems, using particular sources of energy
- F25B27/02—Machines, plants or systems, using particular sources of energy using waste heat, e.g. from internal-combustion engines
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engine Equipment That Uses Special Cycles (AREA)
Abstract
本发明公开了基于气‑热联合调控的分布式冷热电联产系统及调控方法，属于能源机械技术领域，包括内燃机单元，内燃机单元用于对压缩空气储能调控单元和负荷端提供电力，以及对余热利用单元提供余热；压缩空气储能调控单元，用于在用电低谷时将多余电能以高压空气的形式储存，并在用电高峰时补充发电；高温储热调控单元，用于存储调控内燃机排烟的高品质热量；低温储热调控单元，用于存储调控内燃机缸套水的余热与在压缩空气储能中产生的压缩热；余热利用单元，用于与用户侧负荷端连接以提供冷负荷或热负荷。本发明采用上述的基于气‑热联合调控的分布式冷热电联产系统及调控方法，实现内燃机全工况的安全高效运行，充分利用系统中不同品位的能量。
The present invention discloses a distributed cogeneration system and control method based on gas-heat combined control, which belongs to the field of energy machinery technology, including an internal combustion engine unit, which is used to provide electricity to a compressed air energy storage control unit and a load end, and to provide waste heat to a waste heat utilization unit; a compressed air energy storage control unit, which is used to store excess electric energy in the form of high-pressure air during low electricity consumption, and to supplement power generation during peak electricity consumption; a high-temperature heat storage control unit, which is used to store and control high-quality heat for exhaust gas of an internal combustion engine; a low-temperature heat storage control unit, which is used to store and control waste heat of cylinder jacket water of an internal combustion engine and compression heat generated in compressed air energy storage; and a waste heat utilization unit, which is used to connect to the user-side load end to provide cold load or hot load. The present invention adopts the above-mentioned distributed cogeneration system and control method based on gas-heat combined control to achieve safe and efficient operation of the internal combustion engine under all working conditions, and fully utilize energy of different grades in the system.
Description
Technical Field
The invention relates to the technical field of energy machinery, in particular to a distributed combined cooling, heating and power system based on gas-heat combined regulation and control and a regulation and control method.
Background
The distributed combined cooling, heating and power system is a medium-and-small-sized energy conversion and utilization system which is close to a user and supplies energy according to the need and has various functions of power generation, refrigeration, heat supply and the like, and is a leading edge technology in the field of energy in China. In a typical distributed combined cooling, heating and power system, high-temperature heat energy generated by fuel combustion is used for generating electricity through power equipment; the exhaust gas waste heat (medium and low temperature) of the power unit drives the absorption refrigeration or heat pump system to obtain cold or heat load, and the low-temperature waste heat which is difficult to convert is used for heating or generating domestic hot water, so that the cascade utilization of energy is realized. Because of the advantages of high power generation efficiency (20% -40%), short starting time, easy maintenance, strong load fluctuation adaptability and the like of the gas internal combustion engine, a distributed combined cooling heating and power system based on the internal combustion engine is the most common form. However, the above system configuration also suffers from the following drawbacks:
on the one hand, for the internal combustion engine, the high-grade waste heat is mainly contained in high-temperature flue gas, and the temperature of the flue gas is concentrated between 450 and 550 ℃; the heat source temperature range required by the double-effect absorption refrigerating unit is 160-180 ℃, and a temperature fault for waste heat utilization exists between the heat source temperature range and the heat source temperature fault, so that the loss of functional power is large, and the cascade utilization level of the system energy is not high.
On the other hand, the system is influenced by the characteristics of the user (personnel work and rest, equipment use rate and the like) and the climate conditions, and the cold, heat and electric loads of the user side fluctuate at any time. In order to meet the changing electric load demand, the internal combustion engine of the power equipment of the system needs to run under a variable working condition, and the power generation efficiency is reduced; in order to meet the changing cold and hot load demands, the waste heat utilization equipment controlled by the power equipment also needs to solve the problem of dynamic matching between the energy supply side and the energy utilization side. Therefore, the variable working condition performance of the whole distributed combined cooling, heating and power system is greatly reduced, and the problems of low energy saving rate, poor economical efficiency and the like are caused.
In the prior art, a distributed combined cooling heating and power system and a regulation method are provided in a distributed combined cooling heating and power system and a regulation method of a patent CN116878182A, and the defects are that: the energy grade in the electric heating process is reduced,The loss is large; the efficiency of the thermal power generation device is low, for example, the power generation efficiency of the organic Rankine cycle is only about 20%, so that the efficiency of the whole energy storage and release process is low; the supply and demand balance of the cold and hot load is regulated and controlled by electric refrigeration and a heat pump, the energy grade is reduced,The loss is large; the thermochemical energy storage technology has low maturity, high cost and limited practical application.
The patent CN108625988A provides a CCHP micro-grid structure containing compressed air energy storage and an operation method thereof, and the CCHP micro-grid structure containing compressed air energy storage and the operation method thereof have the following defects: the patent improves the capability of the system for absorbing renewable energy sources by optimizing the time-by-time output of the gas generator set, but in order to ensure the energy supply reliability of the system, the energy storage function is a passive following difference value of 'source-load', and the gas power generation equipment still needs to operate under variable working conditions as main power equipment; the patent directly empties the high-temperature flue gas after heating high-pressure air, or the high-temperature flue gas is directly used for absorption refrigeration or heating, and the cascade utilization level of energy is not high.
Disclosure of Invention
The invention aims to provide a distributed combined cooling, heating and power system and a regulating and controlling method based on gas-heat combined regulation, wherein a hybrid power system is formed by a compressed air energy storage regulating and controlling unit and an internal combustion engine unit, so that the internal combustion engine can safely and efficiently run under all working conditions, different grades of energy in the system is fully utilized through heat storage regulation, the loads of cooling, heating and power can be provided according to the demands of users, and the ratio of the energy saved by the combined cooling, heating and power system relative to a sub-supply system to the energy consumed by the sub-supply system is about 40%.
In order to achieve the above purpose, the invention provides a distributed combined cooling, heating and power system based on gas-heat combined regulation, which comprises an internal combustion engine unit, wherein the internal combustion engine unit is main power equipment and is used for providing power for a compressed air energy storage regulation unit and a load end and providing waste heat for a waste heat utilization unit;
the compressed air energy storage regulation and control unit is used for storing redundant electric energy in the form of high-pressure air when electricity is used in low-voltage, and supplementing power generation when electricity is used in high-voltage peaks;
The high-temperature heat storage regulation and control unit is used for storing and controlling high-quality heat of the exhaust gas of the internal combustion engine;
the low-temperature heat storage regulation and control unit is used for storing and controlling the waste heat of cylinder liner water of the internal combustion engine and the compression heat generated in compressed air energy storage;
And the waste heat utilization unit is used for being connected with the user side load end to provide a cold load or a hot load.
Preferably, the internal combustion engine unit comprises an internal combustion engine, and the internal combustion engine is connected with a generator and a cylinder liner water heat exchanger.
Preferably, the compressed air energy storage regulation and control unit comprises a motor, the motor is connected with the generator and the air compressor respectively, the air compressor is connected with the compressed air heat exchanger, the compressed air heat exchanger is connected with the cylinder liner water heat exchanger and the high-pressure air storage tank respectively, the high-pressure air storage tank is connected with the high-temperature flue gas heat exchanger, a regulating valve is arranged between the high-pressure air storage tank and the high-temperature flue gas heat exchanger, the high-temperature flue gas heat exchanger is connected with the air turbine, and the air turbine is connected with the auxiliary generator.
Preferably, the waste heat unit comprises an absorption refrigerating unit and a low-temperature flue gas heat exchanger, and the absorption refrigerating unit is connected with the high-temperature flue gas heat exchanger and the low-temperature flue gas heat exchanger.
Preferably, the high-temperature heat storage regulation and control unit comprises a high-temperature heat storage tank, and the high-temperature heat storage tank is respectively connected with the internal combustion engine, the high-temperature flue gas heat exchanger and the absorption refrigerating unit.
Preferably, the low-temperature heat storage regulation and control unit comprises a low-temperature heat storage tank, the low-temperature heat storage tank is connected with a front distributor and a rear distributor respectively, the front distributor is connected with the cylinder liner water heat exchanger, the compressed air heat exchanger and the absorption refrigerating unit respectively, and the rear distributor is connected with the absorption refrigerating unit and the low-temperature flue gas heat exchanger respectively.
The method for regulating and controlling the distributed combined cooling, heating and power system based on gas-heat combined regulation and control comprises the following steps that air and natural gas enter an internal combustion engine to be combusted, so that the internal combustion engine drives a generator to generate electricity, and the internal combustion engine generates smoke exhaust waste heat and cylinder liner water waste heat, wherein the method for regulating and controlling the internal combustion engine to drive the generator to generate electricity comprises the following steps:
S1.1, acquiring an electric load demand of a user side, and judging whether the generated energy of an internal combustion engine meets the electric load of the user side;
S1.2, if the generated energy of the internal combustion engine is equal to the electric load demand, directly integrating all the generated energy of the internal combustion engine into a power transmission network at a user side;
s1.3, if the generated energy of the internal combustion engine is larger than the electric load demand, starting compressed air energy storage regulation and control, converting the generated energy larger than the electric load into pressure potential energy of air for storage until the electric energy of the user side is matched with the electric load;
s1.4, if the generated energy of the internal combustion engine is smaller than the electric load demand, starting compressed air energy release regulation and control, and converting the pressure potential energy of high-pressure air into electric energy until the electric energy integrated into a user side is matched with the electric load;
s1.5, judging whether the high-pressure air reaches the required temperature or not when starting the energy release regulation and control of the compressed air;
s1.6, if the high-pressure air reaches the required temperature, performing high-temperature heat storage regulation;
S1.7, if the high-pressure air does not reach the required temperature, carrying out high Wen Shire regulation.
Preferably, the comprehensive heat load regulating and controlling method for the exhaust gas waste heat and the cylinder liner water waste heat generated by the internal combustion engine comprises the following steps:
S2.1, acquiring the comprehensive heat load demand of a user side, and judging whether the output cold and hot load of the waste heat utilization unit meets the comprehensive heat load regulation method of the user side;
S2.2, if the cold and hot load output by the waste heat utilization unit is equal to the comprehensive heat load demand, directly integrating all the cold and hot loads output by the waste heat utilization unit into a user side;
S2.3, if the cold and hot load output by the waste heat utilization unit is larger than the comprehensive heat load demand, starting low-temperature heat storage regulation and control until the cold and hot load output by the waste heat utilization unit is matched with the comprehensive heat load demand of the user side;
and S2.4, if the cold and hot load output by the waste heat utilization unit is smaller than the comprehensive heat load demand, starting low-temperature heat release regulation and control until the cold and hot load output by the waste heat utilization unit is matched with the comprehensive heat load demand of the user side.
Therefore, the distributed combined cooling, heating and power system and the regulating and controlling method based on the gas-heat combined regulation are adopted, the compressed air energy storage regulating and controlling unit and the internal combustion engine unit form the hybrid power system, the internal combustion engine can safely and efficiently run under all working conditions, the energy of different grades in the system is fully utilized through heat storage regulation and control, the cooling, heating and power loads can be provided according to the requirements of users, and the ratio of the energy saved by the combined cooling, heating and power system relative to the sub-supply system to the energy consumed by the sub-supply system is about 40%.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
FIG. 1 is a schematic diagram of a distributed combined cooling, heating and power system based on gas-heat combined regulation and control and a distributed combined cooling, heating and power system of an embodiment of a regulation and control method of the invention;
FIG. 2 is a schematic diagram of gas storage, high-temperature heat storage and low-temperature heat storage of an embodiment of a distributed combined cooling, heating and power system and a control method based on gas-heat combined control;
FIG. 3 is a schematic diagram of a gas storage-high temperature heat storage-low Wen Shire of an embodiment of a distributed combined cooling, heating and power system and a control method based on gas-heat combined control of the invention;
FIG. 4 is a schematic diagram of the gas release-high temperature heat storage-low temperature heat storage of the distributed combined cooling, heating and power system and the control method based on the gas-heat combined control of the invention;
FIG. 5 is a schematic diagram of a gas release-high temperature heat storage-low Wen Shire of an embodiment of a distributed combined cooling, heating and power system and a control method based on gas-heat combined control of the invention;
FIG. 6 is a schematic diagram of a combined cooling, heating and power system and a control method for controlling the same according to the embodiment of the invention, wherein the schematic diagram is a schematic diagram of gas release, high-temperature heat release and low Wen Shire;
FIG. 7 is a schematic diagram of a distributed combined cooling, heating and power system and a control method based on gas-heat combined control according to an embodiment of the invention;
fig. 8 is a flowchart of a control method of the distributed combined cooling, heating and power system based on the combined control of gas and heat and the control method of the embodiment of the invention.
Reference numerals
1. A motor; 2. a compressor; 3. a compressed air heat exchanger; 4. a high pressure gas storage tank; 5. a regulating valve; 6. a high temperature flue gas heat exchanger; 7. an air turbine; 8. a sub-generator; 9. an internal combustion engine; 10. a cylinder liner water heat exchanger; 11. a generator; 12. a high-temperature heat storage tank; 13. a front dispenser; 14. an absorption refrigeration unit; 15. a rear dispenser; 16. a low-temperature heat storage tank; 17. a low-temperature flue gas heat exchanger.
Detailed Description
The technical scheme of the invention is further described below through the attached drawings and the embodiments.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs.
Example 1
As shown in fig. 1, the invention provides a distributed combined cooling, heating and power system based on gas-heat combined regulation, which comprises an internal combustion engine 9 unit, wherein the internal combustion engine 9 unit is main power equipment and is used for providing power for a compressed air energy storage regulation unit and a load end and providing waste heat for a waste heat utilization unit. The internal combustion engine 9 unit comprises an internal combustion engine 9, the internal combustion engine 9 is connected with a generator 11 and a cylinder liner water heat exchanger 10, air and fuel are combusted in the internal combustion engine 9, the generator 11 is pushed to generate electricity and discharge high-temperature smoke, and the cylinder liner water heat exchanger 10 heats cold water by waste heat generated by the internal combustion engine 9.
And the compressed air energy storage regulation and control unit is used for storing redundant electric energy in the form of high-pressure air when electricity is used in low-voltage, and supplementing power generation when electricity is used in high-voltage peaks. The compressed air energy storage regulation and control unit comprises a motor 1, wherein the motor 1 is respectively connected with a generator 11 and a compressor 2, the motor 1 is coaxial with the compressor 2 and is used for consuming redundant electric power to drive the compressor 2 when electricity is used in a valley, and the compressor 2 is used for compressing air. The compressor 2 is connected with the compressed air heat exchanger 3, and the compressed air heat exchanger 3 is respectively connected with the cylinder liner water heat exchanger 10 and the high-pressure air storage tank 4. The compressed air heat exchanger 3 heats hot water flowing from the cylinder liner water heat exchanger 10 by using heat of the compressed air, and the high-pressure air storage tank 4 is used for storing high-pressure air cooled by the compressed air heat exchanger 3.
The high-pressure air storage tank 4 is connected with the high-temperature flue gas heat exchanger 6, a regulating valve 5 is arranged between the high-pressure air storage tank 4 and the high-temperature flue gas heat exchanger 6, and the regulating valve 5 can control the flow of high-pressure air in the high-pressure air storage tank 4. The high-temperature flue gas heat exchanger 6 is connected with the air turbine 7, the high-temperature flue gas heat exchanger 6 is used for receiving the high-pressure air regulated by the regulating valve 5, heating the high-pressure air by utilizing the high-temperature flue gas discharged by the internal combustion engine unit, and inputting the heated high-temperature high-pressure air into the air turbine 7. The air turbine 7 is connected with the auxiliary generator 8, the air turbine 7 utilizes high-temperature high-pressure air to expand and do work, and the auxiliary generator 8 is coaxial with the air turbine 7 and is used for supplementing insufficient power generation amount during power utilization peaks.
And the waste heat utilization unit is used for being connected with the user side load end to provide a cold load or a hot load. The waste heat unit comprises an absorption refrigerating unit 14 and a low-temperature flue gas heat exchanger 17, and the absorption refrigerating unit 14 is connected with the high-temperature flue gas heat exchanger 6 and the low-temperature flue gas heat exchanger 17. The absorption refrigeration unit 14 is used for absorbing heat of the medium-temperature flue gas flowing from the high-temperature heat storage tank 12 or the high-temperature flue gas heat exchanger 6 in the compressed air energy storage regulation unit and heat of the hot water flowing from the low-temperature heat storage tank 16 to realize refrigeration, and the low-temperature flue gas heat exchanger 17 is used for recovering waste heat of the absorption refrigeration unit 14 to realize heat supply.
The high-temperature heat storage regulation and control unit is used for storing and controlling high-quality heat of the exhaust smoke of the internal combustion engine 9. The high-temperature heat storage regulation and control unit comprises a high-temperature heat storage tank 12, wherein the high-temperature heat storage tank 12 is respectively connected with the internal combustion engine 9, the high-temperature flue gas heat exchanger 6 and the absorption refrigerating unit 14, and the high-temperature heat storage tank 12 is used for storing heat of a high-temperature section of flue gas exhausted by the internal combustion engine 9.
The low-temperature heat storage regulation and control unit is used for storing and controlling the waste heat of cylinder liner water of the internal combustion engine 9 and the compression heat generated in compressed air energy storage. The low-temperature heat storage regulation unit comprises a low-temperature heat storage tank 16, and the low-temperature heat storage tank 16 is used for storing cylinder liner water heat of the internal combustion engine 9 unit and compression heat generated when the compressed air energy storage regulation unit compresses air. The low-temperature heat storage tank 16 is respectively connected with the front distributor 13 and the rear distributor 15, the front distributor 13 is respectively connected with the cylinder jacket water heat exchanger 10, the compressed air heat exchanger 3 and the absorption refrigerating unit 14, and the rear distributor 15 is respectively connected with the absorption refrigerating unit 14 and the low-temperature flue gas heat exchanger 17. The front distributor 13 is used for regulating and controlling the proportion of hot water flowing to the absorption refrigeration unit 14 and the low-temperature heat storage tank 16 during heat storage, and the rear distributor 15 is used for regulating and controlling the proportion of cold water flowing to the low-temperature flue gas heat exchanger 17 and the low-temperature heat storage tank 16 during heat release.
The compressed air energy storage regulation and control unit can store redundant electric energy in the form of high-pressure air and release electric energy when needed, so that the internal combustion engine 9 is prevented from being influenced by fluctuation of electric demand of a load end at a user side, and continuously operates to generate power under the working condition of a high-efficiency operation area, and accordingly the variable working condition adaptability of the distributed combined cooling heating and power system is effectively improved.
After the high-temperature heat storage regulation and control unit is added, the heat of the high-temperature section of the exhaust smoke of the internal combustion engine 9 can be stored and used for heating the compressed air, so that the cascade utilization level of the system energy is improved, and the regulation and control range of the compressed air energy storage is further enlarged. The low-temperature heat storage regulation and control unit is positioned at the upstream of the waste heat utilization unit, the quality of the stored heat is higher, the waste heat utilization equipment can be driven to refrigerate or supply heat, the dynamic change of side cooling and heat load of a user is met, and the economic effect of system operation is greatly improved.
As shown in FIG. 8, the air and natural gas enter the internal combustion engine 9 to burn so that the internal combustion engine 9 drives the generator 11 to generate electricity, and the internal combustion engine 9 generates exhaust smoke waste heat and cylinder liner water waste heat, wherein the method for regulating and controlling the internal combustion engine 9 to drive the generator 11 to generate electricity comprises the following steps:
S1.1, acquiring an electric load demand of a user side, and judging whether the generated energy of the internal combustion engine 9 meets the electric load of the user side;
S1.2, if the generated energy of the internal combustion engine 9 is equal to the electric load demand, directly integrating all the generated energy of the internal combustion engine 9 into a power transmission network of a user side;
S1.3, if the generated energy of the internal combustion engine 9 is larger than the electric load demand, starting compressed air energy storage regulation and control, converting the generated energy larger than the electric load into pressure potential energy of air for storage until the electric energy of the user side is matched with the electric load;
s1.4, if the generated energy of the internal combustion engine 9 is smaller than the electric load demand, starting compressed air energy release regulation and control, and converting the pressure potential energy of high-pressure air into electric energy until the electric energy which is incorporated into a user side is matched with the electric load;
s1.5, judging whether the high-pressure air reaches the required temperature or not when starting the energy release regulation and control of the compressed air;
s1.6, if the high-pressure air reaches the required temperature, performing high-temperature heat storage regulation;
S1.7, if the high-pressure air does not reach the required temperature, carrying out high Wen Shire regulation.
The comprehensive heat load regulation method for the exhaust gas waste heat and the cylinder liner water waste heat generated by the internal combustion engine 9 comprises the following steps:
S2.1, acquiring the comprehensive heat load demand of a user side, and judging whether the output cold and hot load of the waste heat utilization unit meets the comprehensive heat load regulation method of the user side;
S2.2, if the cold and hot load output by the waste heat utilization unit is equal to the comprehensive heat load demand, directly integrating all the cold and hot loads output by the waste heat utilization unit into a user side;
S2.3, if the cold and hot load output by the waste heat utilization unit is larger than the comprehensive heat load demand, starting low-temperature heat storage regulation and control until the cold and hot load output by the waste heat utilization unit is matched with the comprehensive heat load demand of the user side;
and S2.4, if the cold and hot load output by the waste heat utilization unit is smaller than the comprehensive heat load demand, starting low-temperature heat release regulation and control until the cold and hot load output by the waste heat utilization unit is matched with the comprehensive heat load demand of the user side.
According to the regulation and control method, the distributed combined cooling, heating and power system can have the following conditions, and when the generated energy is larger than the electric load, the cooling and heating output of the distributed combined cooling, heating and power system is larger than the comprehensive heat load demand, and the operation process of the distributed combined cooling, heating and power system is gas storage, high-temperature heat storage and low-temperature heat storage, as shown in figure 2. When the generated energy is larger than the electric load and the cold and heat output of the distributed combined cooling and heating power system is smaller than the comprehensive heat load demand, the operation process of the distributed combined cooling and heating power system is gas storage, high-temperature heat storage and low-temperature heat release, as shown in figure 3.
When the generated energy is smaller than the electric load and the high-pressure air can reach the required temperature, and the cooling and heating output of the distributed combined cooling and heating system is larger than the comprehensive heat load demand, the operation process of the distributed combined cooling and heating system is gas release, high-temperature heat storage and low-temperature heat storage, as shown in fig. 4. When the generated energy is smaller than the electric load and the high-pressure air can reach the required temperature, and the cooling and heating output of the distributed combined cooling and heating system is smaller than the comprehensive heat load demand, the operation process of the distributed combined cooling and heating system is gas release, high-temperature heat storage and low-temperature heat release, as shown in fig. 5.
When the generated energy is smaller than the electric load and the high-pressure air can not reach the required temperature, and the cooling and heating output of the distributed combined cooling and heating system is smaller than the comprehensive heat load demand, the operation process of the distributed combined cooling and heating system is gas release, high-temperature heat release and low-temperature heat release, as shown in fig. 6. When the generated energy is smaller than the electric load and the high-pressure air cannot reach the required temperature, and the cooling and heating output of the distributed combined cooling and heating power system is larger than the comprehensive heat load demand, the operation process of the distributed combined cooling and heating power system is gas release, high-temperature heat release and low-temperature heat storage, as shown in fig. 7.
Therefore, the distributed combined cooling, heating and power system and the regulating and controlling method based on the gas-heat combined regulation are adopted, the compressed air energy storage regulating and controlling unit and the internal combustion engine unit form the hybrid power system, the internal combustion engine can safely and efficiently run under all working conditions, the energy of different grades in the system is fully utilized through heat storage regulation and control, the cooling, heating and power loads can be provided according to the requirements of users, and the ratio of the energy saved by the combined cooling, heating and power system relative to the sub-supply system to the energy consumed by the sub-supply system is about 40%.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention and not for limiting it, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that: the technical scheme of the invention can be modified or replaced by the same, and the modified technical scheme cannot deviate from the spirit and scope of the technical scheme of the invention.
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