CN110567041A - Distributed energy storage peak regulation heating system for thermoelectric urban heat supply - Google Patents
Distributed energy storage peak regulation heating system for thermoelectric urban heat supply Download PDFInfo
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- CN110567041A CN110567041A CN201810566492.9A CN201810566492A CN110567041A CN 110567041 A CN110567041 A CN 110567041A CN 201810566492 A CN201810566492 A CN 201810566492A CN 110567041 A CN110567041 A CN 110567041A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
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- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
- Steam Or Hot-Water Central Heating Systems (AREA)
Abstract
The invention provides a thermoelectric urban heat supply distributed energy storage peak-shaving heating system, which at least comprises: the system comprises a thermal power plant unit (1), a heating unit (2), a phase change heat storage water tank (3), a plate heat exchanger (4), a terminal fan coil (5), a temperature monitor (6), a heating circulating water pump (7), a pressure monitor (8), a check valve (9), a phase change energy storage material (10), electric heating (11), a pipeline circulating water pump (12) and an expansion tank (13). The system is characterized in that a thermal power plant unit (1) and a phase change heat storage water tank (3) form a heat storage circulation loop, heating hot water of the thermal power plant is sent into the phase change heat storage water tank (3) through a pipeline circulating water pump (12), and an expansion tank (13) is arranged on a pipeline; the phase change heat storage water tank (3) and the plate heat exchanger (4) form a heating heat exchange loop, and an electric heater (11) is arranged in the phase change heat storage water tank (3); the heating circulating water pump (7) distributes heat to the terminal fan coil (5), and a temperature monitor (6) and a pressure monitor (8) are arranged in the pipeline to provide data; when the heating of the thermal power plant unit (1) is sufficient, the surplus heat is stored in the phase-change energy storage material (10), and when the heating of the thermal power plant unit (1) is insufficient, the phase-change energy storage material (10) provides an auxiliary heat source.
Description
Technical Field
The invention relates to a distributed energy storage peak-load regulation heating system for thermoelectric urban heat supply, belonging to the fields of energy efficient utilization technology and peak load shifting.
Background
Energy is more and more important in the process of rapid development of economy in China, energy conservation and emission reduction in the field of buildings are being greatly popularized and built, and energy consumption and energy conservation for heating and heating are very critical. The thermal power plant is a large energy consumption household and a large pollutant emission household, and the improvement of the energy utilization efficiency of the power plant is of great importance.
In order to improve the energy utilization efficiency and promote the energy cascade utilization of a thermal power plant, after fuel is released in a boiler, heating steam enters a steam turbine to do work to generate electricity, and the done steam is used for urban heat supply. Has the advantages of saving energy, improving environment, providing heat supply quality and the like. Compared with a pure power plant, the cogeneration power plant reduces the power generation cost, reduces the coal consumption compared with a central heating boiler, and improves the boiler efficiency. However, in the operation process of the thermal power plant, the operation efficiency of the power plant is greatly influenced by the change of the urban power load and the heating load. The reasonable load allocation avoids the waste of energy sources, and the implementation of a peak clipping and valley filling type heating system is imperative.
Phase change energy storage is the core equipment of key technology in flexibility transformation in heat supply of thermal power plants. The phase change energy storage material is a novel composite material which stores/releases energy by utilizing the fact that the material absorbs or releases a great amount of latent heat in the phase change process. When the phase state (physical state) of the material is changed, the temperature of the material is almost kept unchanged, and the latent heat absorbed or released is quite large. The material is non-toxic and non-corrosive, and has high energy storage density.
The invention provides a distributed energy storage peak-shaving heating system for heat and electricity urban heating, which mainly utilizes a phase change energy storage technology to solve the problem of unbalanced supply and demand of a heat power plant and a heating user. In the daytime, the power plant generates large heat due to large power load demand of the urban power supply grid, and the heating load of heating buildings in counties and cities is very small. At night, the power load of the urban power supply grid is reduced, and the heat supply load of a power plant is reduced. At the moment, the heating load of the county city is large, so that the problems of excessive heat supply in the daytime and insufficient heat supply at night occur. Therefore, the peak clipping and valley filling are needed to store the surplus heat supplied by the power plant in the daytime, and the stored heat is supplemented when the heat supply of the power plant is insufficient at night, so that the heating requirement is ensured.
Disclosure of Invention
The present invention has been made to solve the above problems, and an object of the present invention is to provide a distributed energy storage peak shaving heating system for thermoelectric urban heating, which can meet heating requirements, reduce coal consumption of a thermal power plant, and improve operation efficiency of the thermal power plant.
The distributed energy storage peak-shaving heating system for thermoelectric urban heat supply comprises: the system comprises a thermal power plant unit (1), a heating unit (2), a phase change heat storage water tank (3), a plate heat exchanger (4), a terminal fan coil (5), a temperature monitor (6), a heating circulating water pump (7), a pressure monitor (8), a check valve (9), a phase change energy storage material (10), electric heating (11), a pipeline circulating water pump (12) and an expansion tank (13). The system is characterized in that a thermal power plant unit (1) and a phase change heat storage water tank (3) form a heat storage circulation loop, heating hot water of the thermal power plant is sent into the phase change heat storage water tank (3) through a pipeline circulating water pump (12), and an expansion tank (13) is arranged on a pipeline; the phase change heat storage water tank (3) and the plate heat exchanger (4) form a heating heat exchange loop, and an electric heater (11) is arranged in the phase change heat storage water tank (3); the heating circulating water pump (7) distributes heat to the terminal fan coil (5), and a temperature monitor (6) and a pressure monitor (8) are arranged in the pipeline to provide data; when the heating of the thermal power plant unit (1) is sufficient, the surplus heat is stored in the phase-change energy storage material (10), and when the heating of the thermal power plant unit (1) is insufficient, the phase-change energy storage material (10) provides an auxiliary heat source.
Further, the distributed energy storage peak-shaving heating system for the thermoelectric urban heating also has the following characteristics: the distributed energy storage peak-shaving heating system is divided into three modules, namely a thermal power plant unit module, a heating unit module and a hydraulic power module.
Further, the distributed energy storage peak-shaving heating system for the thermoelectric urban heating also has the following characteristics: the heating unit module in the distributed energy storage peak shaving heating system can be divided into a plurality of heating sheet areas according to the heating load demand and the heating area to form distributed heating.
Further, the distributed energy storage peak-shaving heating system for the thermoelectric urban heating also has the following characteristics: the phase change heat storage water tank in the distributed energy storage peak-shaving heating system stores the surplus heat of the thermal power plant in the phase change energy storage core, avoids energy waste and plays a role in peak shaving.
Further, the distributed energy storage peak-shaving heating system for the thermoelectric urban heating also has the following characteristics: the distributed energy storage peak-shaving heating system can utilize redundant electric energy to heat the heat storage water tank when the power production of the hot spot plant unit is excessive, and the electric energy is converted into heat energy to be stored.
Further, the distributed energy storage peak-shaving heating system for the thermoelectric urban heating also has the following characteristics: a pipeline circulating water pump, a heating circulating water pump, a check valve, an expansion tank and other auxiliary equipment in the distributed energy storage peak-shaving heating system form a hydraulic module.
Further, the distributed energy storage peak-shaving heating system for the thermoelectric urban heating also has the following characteristics: phase change heat storage water tank, plate heat exchanger, terminal fan coil, temperature monitor, pressure monitor and heating circulating water pump and other auxiliary assembly constitute heating unit module in the distributed energy storage peak regulation heating system.
Further, the distributed energy storage peak-shaving heating system for the thermoelectric urban heating also has the following characteristics: the distributed energy storage peak-shaving heating system preferentially uses a thermal power plant to directly supply heat, and stores heat in the phase-change material when the heat is excessive; when the heating of the thermal power plant unit is insufficient, the phase change energy storage material provides an auxiliary heat source.
Further, the distributed energy storage peak-shaving heating system for the thermoelectric urban heating also has the following characteristics: the distributed energy storage peak-shaving heating system uses a PLC logic control system in operation, and data are collected by a temperature monitor and a pressure monitor in a pipeline.
Further, the distributed energy storage peak-shaving heating system for the thermoelectric urban heating also has the following characteristics: the distributed energy storage peak-shaving heating system plays a role in peak shaving and valley filling of urban heating, so that the heating requirement is guaranteed, and the working efficiency of the thermal power plant is improved.
The special phase-change energy storage material of the distributed energy storage peak-shaving heating system for the thermoelectric urban heat supply stores heat energy in the energy storage material, and when heating is needed, heat is provided for users through the plate heat exchanger.
Drawings
Fig. 1 shows a schematic diagram of a distributed energy storage peak shaving heating system for thermoelectric city heating according to the present invention.
Detailed Description
The invention provides a thermoelectric urban heat supply distributed energy storage peak regulation heating system, at least comprising: the system comprises a thermal power plant unit, a heating unit, a phase-change heat storage water tank, a plate heat exchanger, a terminal fan coil, a temperature monitor, a heating circulating water pump, a pressure monitor, a check valve, a phase-change energy storage material, electric heating, a pipeline circulating water pump and an expansion tank.
The system is characterized in that the energy storage heat supply heating system comprises a direct heating mode, a heat storage mode and a mixed heating mode of the thermal power plant, and the system is set according to the load change of a user and the operation condition of the thermal power plant in the operation process of the system.
Direct heating mode of thermal power plant: the heat loss of the heating user side in the daytime is less than that of the heating user side at night, the electric load is larger, and the thermal power plant can generate thermal steam while meeting the normal power demand. At this point, thermal support is provided directly to the heating units of each panel.
Thermal power plant heat storage mode: the mode is divided into two modes, one mode is that the excess heat of the thermal power plant is directly stored, and when the heat generated by the thermal power plant is excess and meets the requirement of a heating unit, the excess heat is stored in a phase change energy storage material of a phase change heat storage water tank; the other type utilizes the surplus electric energy of the thermal power plant, and converts the electric energy into heat energy by utilizing the electric heating in the system for storage, thereby avoiding the waste of energy.
Hybrid heating mode: when heat load increases at night, the heat power plant produces heat and can not satisfy the demand of heating unit, through plate heat exchanger with the heat output in the phase change heat storage water tank, provides auxiliary heat source.
In the operation process of the system, the system is regulated and controlled through PLC logic control, and a temperature monitor and a pressure monitor are arranged on each pipeline to provide system data. The user side can freely set the required temperature and start and stop the system to regulate the temperature of the room.
Effects of the implementation
This heat and electricity city heat supply distributed energy storage peak shaving heating system can realize the energy cascade utilization, combines phase change energy storage material again to store heat energy, avoids the waste of the surplus heat energy of steam power plant and surplus electric energy to improve system's operating efficiency, guaranteed the stability of system's operation.
The energy storage peak regulation heating system has the characteristics of environmental protection, energy conservation, no pollution discharge and the like; the energy storage material is non-toxic and non-corrosive, and has high energy storage density and small occupied area; PLC programming control is adopted, and remote management operation can be realized; the surplus energy is efficiently utilized, and the operation cost is low.
Claims (10)
1. Thermoelectric urban heating distributed energy storage peak shaving heating system, it includes at least: the system comprises a thermal power plant unit (1), a heating unit (2), a phase change heat storage water tank (3), a plate heat exchanger (4), a terminal fan coil (5), a temperature monitor (6), a heating circulating water pump (7), a pressure monitor (8), a check valve (9), a phase change energy storage material (10), electric heating (11), a pipeline circulating water pump (12) and an expansion tank (13), and is characterized in that the thermal power plant unit (1) and the phase change heat storage water tank (3) form a heat storage circulating loop, heating hot water of the thermal power plant is sent into the phase change heat storage water tank (3) through the pipeline circulating water pump (12), and the expansion tank (13) is installed on a; the phase change heat storage water tank (3) and the plate heat exchanger (4) form a heating heat exchange loop, and an electric heater (11) is arranged in the phase change heat storage water tank (3); the heating circulating water pump (7) distributes heat to the terminal fan coil (5), and a temperature monitor (6) and a pressure monitor (8) are arranged in the pipeline to provide data; when the heating of the thermal power plant unit (1) is sufficient, the surplus heat is stored in the phase-change energy storage material (10), and when the heating of the thermal power plant unit (1) is insufficient, the phase-change energy storage material (10) provides an auxiliary heat source.
2. The thermoelectric urban heating distributed energy storage peak-shaving heating system according to claim 1, characterized in that: the distributed energy storage peak-shaving heating system is divided into three modules, namely a thermal power plant unit module, a heating unit module and a hydraulic power module.
3. The thermoelectric urban heating distributed energy storage peak-shaving heating system according to claim 1, characterized in that: the heating unit module in the distributed energy storage peak shaving heating system can be divided into a plurality of heating sheet areas according to the heating load demand and the heating area to form distributed heating.
4. The thermoelectric urban heating distributed energy storage peak-shaving heating system according to claim 1, characterized in that: the phase change heat storage water tank in the distributed energy storage peak-shaving heating system stores the surplus heat of the thermal power plant in the phase change energy storage core, avoids energy waste and plays a role in peak shaving.
5. The thermoelectric urban heating distributed energy storage peak-shaving heating system according to claim 1, characterized in that: the distributed energy storage peak-shaving heating system can utilize redundant electric energy to heat the heat storage water tank when the power production of the hot spot plant unit is excessive, and the electric energy is converted into heat energy to be stored.
6. The thermoelectric urban heating distributed energy storage peak-shaving heating system according to claim 1, characterized in that: a pipeline circulating water pump, a heating circulating water pump, a check valve, an expansion tank and other auxiliary equipment in the distributed energy storage peak-shaving heating system form a hydraulic module.
7. The thermoelectric urban heating distributed energy storage peak-shaving heating system according to claim 1, characterized in that: phase change heat storage water tank, plate heat exchanger, terminal fan coil, temperature monitor, pressure monitor and heating circulating water pump and other auxiliary assembly constitute heating unit module in the distributed energy storage peak regulation heating system.
8. The thermoelectric urban heating distributed energy storage peak-shaving heating system according to claim 1, characterized in that: the distributed energy storage peak-shaving heating system preferentially uses a thermal power plant to directly supply heat, and stores heat in the phase-change material when the heat is excessive; when the heating of the thermal power plant unit is insufficient, the phase change energy storage material provides an auxiliary heat source.
9. The thermoelectric urban heating distributed energy storage peak-shaving heating system according to claim 1, characterized in that: the distributed energy storage peak-shaving heating system uses a PLC logic control system in operation, and data are collected by a temperature monitor and a pressure monitor in a pipeline.
10. The thermoelectric urban heating distributed energy storage peak-shaving heating system according to claim 1, characterized in that: the distributed energy storage peak-shaving heating system plays a role in peak shaving and valley filling of urban heating, so that the heating requirement is guaranteed, and the working efficiency of the thermal power plant is improved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810566492.9A CN110567041A (en) | 2018-06-05 | 2018-06-05 | Distributed energy storage peak regulation heating system for thermoelectric urban heat supply |
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| CN201810566492.9A CN110567041A (en) | 2018-06-05 | 2018-06-05 | Distributed energy storage peak regulation heating system for thermoelectric urban heat supply |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114396820A (en) * | 2022-01-20 | 2022-04-26 | 北京英沣特能源技术有限公司 | Phase-change energy storage and release device and method based on local excitation |
| CN114459154A (en) * | 2022-02-21 | 2022-05-10 | 河北水利电力学院 | Phase-change heat accumulating type biomass heating boiler |
| CN114623483A (en) * | 2022-03-17 | 2022-06-14 | 中航天建设工程集团有限公司 | Modular electric energy phase-change heat storage purification air supply heating system |
| CN116412566A (en) * | 2023-02-07 | 2023-07-11 | 华能济南黄台发电有限公司 | Cold energy storage system for centralized cold supply of urban thermal power plant |
-
2018
- 2018-06-05 CN CN201810566492.9A patent/CN110567041A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114396820A (en) * | 2022-01-20 | 2022-04-26 | 北京英沣特能源技术有限公司 | Phase-change energy storage and release device and method based on local excitation |
| CN114459154A (en) * | 2022-02-21 | 2022-05-10 | 河北水利电力学院 | Phase-change heat accumulating type biomass heating boiler |
| CN114623483A (en) * | 2022-03-17 | 2022-06-14 | 中航天建设工程集团有限公司 | Modular electric energy phase-change heat storage purification air supply heating system |
| CN116412566A (en) * | 2023-02-07 | 2023-07-11 | 华能济南黄台发电有限公司 | Cold energy storage system for centralized cold supply of urban thermal power plant |
| CN116412566B (en) * | 2023-02-07 | 2024-01-26 | 华能济南黄台发电有限公司 | Cold energy storage system for centralized cold supply of urban thermal power plant |
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Application publication date: 20191213 |
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