CN111637512B - Distributed intelligent energy system and control method thereof - Google Patents
Distributed intelligent energy system and control method thereof Download PDFInfo
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- CN111637512B CN111637512B CN202010303186.3A CN202010303186A CN111637512B CN 111637512 B CN111637512 B CN 111637512B CN 202010303186 A CN202010303186 A CN 202010303186A CN 111637512 B CN111637512 B CN 111637512B
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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
- F24D10/00—District heating systems
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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
- F24D11/00—Central heating systems using heat accumulated in storage masses
- F24D11/002—Central heating systems using heat accumulated in storage masses water heating system
- F24D11/003—Central heating systems using heat accumulated in storage masses water heating system combined with solar energy
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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
- F24D11/00—Central heating systems using heat accumulated in storage masses
- F24D11/002—Central heating systems using heat accumulated in storage masses water heating system
- F24D11/004—Central heating systems using heat accumulated in storage masses water heating system with conventional supplementary heat source
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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
- F24D11/00—Central heating systems using heat accumulated in storage masses
- F24D11/002—Central heating systems using heat accumulated in storage masses water heating system
- F24D11/005—Central heating systems using heat accumulated in storage masses water heating system with recuperation of waste heat
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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
- F24D19/1015—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves
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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
- F24D19/1045—Arrangement or mounting of control or safety devices for water heating systems for central heating the system uses a heat pump and solar energy
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0003—Exclusively-fluid systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0046—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground
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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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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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
- F25B27/002—Machines, plants or systems, using particular sources of energy using solar energy
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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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- 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
- F25B30/00—Heat pumps
- F25B30/06—Heat pumps characterised by the source of low potential heat
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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
- F25B49/00—Arrangement or mounting of control or safety devices
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
- Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/17—District heating
Abstract
The invention relates to a distributed intelligent energy system and a control method thereof, wherein the system comprises an energy station and a water chilling unit, the energy station comprises a heat collection heat exchanger and a heat transfer heat exchanger, two ports on the primary side of the heat collection heat exchanger and two ports on the primary side of the heat transfer heat exchanger are sequentially connected to form a heat exchange circulation loop, two ports on the secondary side of the heat collection heat exchanger are connected with a distributed heat source to form a heat collection circulation loop, and two ports on the secondary side of the heat transfer heat exchanger are correspondingly connected with the tail end of a load through a water feeding pipeline and a water returning pipeline to form a heat supply circulation loop; the water chilling unit comprises a first heat exchanger, a second heat exchanger, a third heat exchanger, a fourth heat exchanger and a fifth heat exchanger, two ports of the third heat exchanger and the fifth heat exchanger are correspondingly connected with a water feeding pipeline and a water return pipeline through three-way control valves respectively, and the water chilling unit has the advantages of simple structure, low cost, easiness in control, safety and reliability; the control method has the advantages of simple flow and good energy-saving effect.
Description
Technical Field
The invention relates to an energy comprehensive utilization system, in particular to a distributed intelligent energy system with multi-energy complementation and a control method of the system.
Background
The existing energy station usually adopts a mode of respectively transmitting and distributing cold and heat, the input energy can come from various heat sources such as a thermal power plant, a waste heat boiler, industrial waste heat, a ground source heat pump, solar photo-thermal and the like, the energy needs to be converted into cold (heat) media meeting the requirements through equipment in the energy station, and the cold (heat) media is transmitted into an air conditioner room at the tail end of a load through a transmission and distribution pipe network to be used as air conditioner circulating freezing (hot) water. The existing energy station needs to be provided with primary pipe network hot water and secondary pipe network hot water, and also needs to be provided with a cold station and provide a cold water pipe network to meet the refrigeration requirements of users, so that not only is a pipe network transmission and distribution system complex, the control difficulty is high, but also the temperature difference is small due to cooling in summer, the pipe diameter of the transmission and distribution pipe network is required to be large, and the construction and operation cost is increased.
Disclosure of Invention
The invention aims to provide a distributed intelligent energy system and a control method thereof, wherein the system has the advantages of simple structure, low cost, easy control, safety and reliability; the control method has the advantages of simple flow, easy realization and good energy-saving effect.
In order to solve the problems in the prior art, the invention provides a distributed intelligent energy system which comprises an energy station and a water chilling unit arranged at the tail end of a load, wherein the energy station comprises a heat collection heat exchanger and a heat transfer heat exchanger, two ports at the primary side of the heat collection heat exchanger and two ports at the primary side of the heat transfer heat exchanger are sequentially connected to form a heat exchange circulation loop, two ports at the secondary side of the heat collection heat exchanger are connected with a distributed heat source to form a heat collection circulation loop, and two ports at the secondary side of the heat transfer heat exchanger are correspondingly connected with the tail end of the load through a water supply pipeline and a water return pipeline to form a heat supply circulation loop; the water chilling unit comprises a first heat exchanger and a second heat exchanger which are sequentially arranged, the water chilling unit further comprises a fifth heat exchanger, two ports of the fifth heat exchanger are correspondingly connected with the water feeding pipeline and the water returning pipeline through three-way control valves respectively, a third sprayer and a third liquid collecting tank are correspondingly arranged on the upper side and the lower side of the fifth heat exchanger, and the third sprayer and the third liquid collecting tank are correspondingly connected with the first liquid collecting tank and the first sprayer to form a saline solution circulation loop.
Furthermore, the invention relates to a distributed intelligent energy system, wherein the energy station further comprises an oil-gas boiler, the oil-gas boiler is connected in parallel in a heat exchange circulation loop between the heat collection heat exchanger and the heat transfer heat exchanger, and electromagnetic control valves are respectively arranged at two ports of the oil-gas boiler and between connection points of the heat exchange circulation loop and the two ports of the oil-gas boiler.
Furthermore, the invention discloses a distributed intelligent energy system, wherein a plurality of heat collecting heat exchangers are arranged and connected in parallel in a heat exchange circulation loop; the distributed heat source comprises a ground source heat pump unit, a solar unit, a thermal power plant waste heat unit, an industrial waste heat unit and a waste heat boiler unit.
Further, the invention relates to a distributed intelligent energy system, wherein the ground source heat pump unit, the solar unit, the thermal power plant waste heat unit, the industrial waste heat unit and the waste heat boiler unit are connected with the plurality of heat collection heat exchangers in a one-to-one correspondence manner and respectively form a heat collection circulation sub-loop.
Furthermore, the invention relates to a distributed intelligent energy system, wherein a plurality of heat transfer heat exchangers are arranged, the heat transfer heat exchangers are connected in parallel in a heat exchange circulation loop, the heat transfer heat exchangers are respectively connected with different load tail ends through corresponding heat supply circulation loops, and the water chilling unit is provided with a plurality of water chilling units and correspondingly arranged at different load tail ends.
Furthermore, the invention relates to a distributed intelligent energy system, wherein at least one energy storage tank is arranged in the saline solution circulation loop.
Furthermore, the distributed intelligent energy system also comprises a controller which is respectively connected with the energy station, the water chilling unit, the distributed heat source and the three-way control valve; a first temperature sensor is arranged at a primary side water outlet of the heat collection heat exchanger, a second temperature sensor is arranged at a secondary side water outlet of the heat transfer heat exchanger, and a third temperature sensor, a fourth temperature sensor, a fifth temperature sensor, a sixth temperature sensor and a seventh temperature sensor are correspondingly arranged at outlets of the ground source heat pump unit, the solar energy unit, the thermal power plant waste heat unit, the industrial waste heat unit and the waste heat boiler unit; the first temperature sensor, the second temperature sensor, the third temperature sensor, the fourth temperature sensor, the fifth temperature sensor, the sixth temperature sensor and the seventh temperature sensor are respectively connected with the controller.
Furthermore, the invention relates to a distributed intelligent energy system, wherein circulating pumps are respectively arranged in the heat exchange circulating loop, the heat collection circulating loop, the heat supply circulating loop, the heat dissipation circulating loop, the spraying circulating loop, the saline solution circulating loop and connecting pipelines of the fifth heat exchanger and the three-way control valve.
Furthermore, the invention provides a distributed intelligent energy system, wherein the first heat exchanger, the third heat exchanger, the fourth heat exchanger and the fifth heat exchanger are inner-cooling type plastic heat exchangers, and the second heat exchanger is a filler type plastic heat exchanger.
The invention also provides a control method of the distributed intelligent energy system, which comprises the following steps:
under the working condition of heat supply in winter, the cold water unit is disconnected from a water supply pipeline and a water return pipeline by controlling each three-way control valve, and the secondary side of the heat transfer heat exchanger is communicated with the tail end of a load through a heat supply circulation loop;
under the working condition of cooling in summer, the fifth heat exchanger is connected with the secondary side of the heat transfer heat exchanger through a water supply pipeline and a water return pipeline to form a regenerative heat circulation loop by controlling each three-way control valve, and the third heat exchanger is connected with the tail end of a load through the water supply pipeline and the water return pipeline to form a cooling circulation loop;
starting the system, stopping the oil-gas boiler, disconnecting the oil-gas boiler from the heat exchange circulation loop by controlling each electromagnetic control valve, and respectively detecting the temperature of each corresponding position by a first temperature sensor, a second temperature sensor, a third temperature sensor, a fourth temperature sensor, a fifth temperature sensor, a sixth temperature sensor and a seventh temperature sensor;
fourthly, when the temperature detection value of any one of the third temperature sensor, the fourth temperature sensor, the fifth temperature sensor, the sixth temperature sensor and the seventh temperature sensor is lower than that of the first temperature sensor, stopping the heat collection circulation sub-loop corresponding to the heat source;
fifthly, when the temperature detection value of the second temperature sensor is lower than a preset first temperature threshold value, starting the oil-gas boiler, and controlling each electromagnetic control valve to enable the oil-gas boiler to be added into the heat exchange circulation loop; when the temperature detection value of the second temperature sensor is higher than a preset second temperature threshold value, the oil-gas boiler is stopped, and the connection between the oil-gas boiler and the heat exchange circulation loop is disconnected by controlling each electromagnetic control valve;
in the third step, if the working condition of heat supply in winter is the working condition, the water chilling unit is stopped; if the working condition is summer cooling, the water chilling unit is started.
Compared with the prior art, the distributed intelligent energy system and the control method thereof have the following advantages: the energy station is provided with the heat collection heat exchanger and the heat transfer heat exchanger, two ports on the primary side of the heat collection heat exchanger and two ports on the primary side of the heat transfer heat exchanger are sequentially connected to form a heat exchange circulation loop, two ports on the secondary side of the heat collection heat exchanger are connected with a distributed heat source to form a heat collection circulation loop, and two ports on the secondary side of the heat transfer heat exchanger are correspondingly connected with the load tail end through a water feeding pipeline and a water returning pipeline to form a heat supply circulation loop; the water chilling unit is provided with a first heat exchanger, a second heat exchanger, a third heat exchanger and a fourth heat exchanger which are sequentially arranged, two ports of the first heat exchanger and two ports of the fourth heat exchanger are connected to form a heat dissipation circulation loop, a first sprayer and a first liquid collecting tank are correspondingly arranged on the upper side and the lower side of the first heat exchanger, a second sprayer and a second liquid collecting tank are correspondingly arranged on the upper side and the lower side of the second heat exchanger, the second sprayer and the second liquid collecting tank are connected with a high-temperature cold water source to form a spraying circulation loop, two ports of the third heat exchanger are correspondingly connected with a water supply pipeline and a water return pipeline through three-way control valves respectively, the water chilling unit is provided with a fifth heat exchanger, wherein two ports of the fifth heat exchanger are correspondingly connected with the water supply pipeline and the water return pipeline through three-way control valves respectively, and a third sprayer and a third liquid collecting tank are correspondingly arranged on the upper side and the lower side of the fifth heat exchanger, the third sprayer and the third liquid collecting tank are correspondingly connected with the first liquid collecting tank and the first sprayer to form a saline solution circulating loop. Therefore, the distributed intelligent energy system with simple structure, low cost, easy control, safety and reliability is formed. Compared with the prior art, the invention can realize the purposes of heat supply in winter and cold supply in summer at the same time by only conveying hot water from the energy station to the load tail end, can effectively reduce the pipe diameter of a transmission and distribution pipe network, reduces the construction and operation cost, simplifies the system structure and reduces the control difficulty. The working process of the water chilling unit is as follows: when air flows through the first heat exchanger, the second heat exchanger, the third heat exchanger and the fourth heat exchanger in sequence, firstly, high-concentration salt solution sprayed at the first heat exchanger can dehumidify the air, the high-concentration salt solution absorbs moisture in the air and changes the moisture into low-concentration salt solution, and the air changes into dry air; then the high-temperature cold water sprayed at the second heat exchanger can cool the air, the high-temperature cold water is contacted with the dry air to generate evaporation and absorb heat, and the temperature of the air is reduced to become low-temperature air; then the low-temperature air passes through a third heat exchanger and exchanges heat with water in the third heat exchanger, so that the temperature of the water is reduced, and the purpose of preparing cold water is achieved, and the prepared cold water is supplied to the tail end of a load for use; and then the air passes through a fourth heat exchanger and is discharged after heat exchange with water in the fourth heat exchanger. Phase change latent heat generated by heat and moisture exchange between the high-concentration salt solution and air at the first heat exchanger is transmitted to the fourth heat exchanger through the heat dissipation circulation loop and is taken away by the air; the low concentration salt solution after the dehumidification can pass through the salt solution circulation return circuit and carry the third spray thrower, spray the in-process and provide the heat that the salt solution regeneration needs by the fifth heat exchanger, the air that flows through the fifth heat exchanger on the one hand can absorb the moisture in the low concentration salt solution and make its regeneration be high concentration salt solution, on the other hand the air can absorb the heat of water in the fifth heat exchanger and make its temperature reduce, water after the temperature reduction can pass through three-way control valve, water supply pipeline and return water pipeline and carry the heat transfer heat exchanger, circulation operation so. The control method of the distributed intelligent energy system provided by the invention has the advantages of simple flow, easiness in realization and good energy-saving effect.
The distributed intelligent energy system and the control method thereof according to the present invention will be further described in detail with reference to the following embodiments shown in the accompanying drawings.
Drawings
Fig. 1 is a schematic structural diagram of a distributed smart energy system according to the present invention.
Detailed Description
First, it should be noted that, the directional terms such as up, down, left, right, front, rear, etc. described in the present invention are only described with reference to the accompanying drawings for easy understanding, and do not limit the technical solution and the claimed scope of the present invention.
Fig. 1 shows an embodiment of a distributed intelligent energy system according to the present invention, which includes an energy station 1 and a chiller 2 disposed at the end of a load. The energy station 1 is provided with a heat collection heat exchanger 11 and a heat transfer heat exchanger 12, two ports on the primary side of the heat collection heat exchanger 11 and two ports on the primary side of the heat transfer heat exchanger 12 are sequentially connected to form a heat exchange circulation loop, two ports on the secondary side of the heat collection heat exchanger 11 are connected with a distributed heat source 3 to form a heat collection circulation loop, and two ports on the secondary side of the heat transfer heat exchanger 12 are correspondingly connected with a load tail end 6 through a water supply pipeline 4 and a water return pipeline 5 to form a heat supply circulation loop. The water chilling unit 2 is provided with a first heat exchanger 21, a second heat exchanger 22, a third heat exchanger 23 and a fourth heat exchanger 24 which are sequentially arranged. Two ports of the first heat exchanger 21 and two ports of the fourth heat exchanger 24 are connected to form a heat dissipation circulation circuit, and a first shower 211 and a first sump 212 are correspondingly provided on the upper and lower sides of the first heat exchanger 21. The second shower 221 and the second header tank 222 are correspondingly arranged on the upper and lower sides of the second heat exchanger 22, and the second shower 221 and the second header tank 222 are connected with the high-temperature cold water source 223 to form a shower circulation loop. Two ports of the third heat exchanger 23 are correspondingly connected with the water feeding pipeline 4 and the water return pipeline 5 through a three-way control valve 7 respectively. The water chilling unit 2 is provided with a fifth heat exchanger 25, two ports of the fifth heat exchanger 25 are correspondingly connected with the water feeding pipeline 4 and the water return pipeline 5 through a three-way control valve 7, a third sprayer 251 and a third liquid collecting tank 252 are correspondingly arranged on the upper side and the lower side of the fifth heat exchanger 25, and the third sprayer 251 and the third liquid collecting tank 252 are correspondingly connected with the first liquid collecting tank 212 and the first sprayer 211 to form a saline solution circulation loop.
Through the structure, the distributed intelligent energy system with simple structure, low cost, easy control, safety and reliability is formed. Compared with the existing energy station, the invention can realize the purposes of winter heat supply and summer heat supply simultaneously by only conveying hot water from the energy station 1 to the load tail end 6, can effectively reduce the pipe diameter of a transmission and distribution pipe network, reduce the construction and operation cost, simplify the system structure and reduce the control difficulty. The working process of the water chilling unit 2 is as follows: when air flows through the first heat exchanger 21, the second heat exchanger 22, the third heat exchanger 23 and the fourth heat exchanger 24 in sequence, firstly, high-concentration salt solution sprayed at the first heat exchanger 21 can dehumidify the air, the high-concentration salt solution absorbs moisture in the air and turns into low-concentration salt solution, and the air turns into dry air; then the air is cooled by the high-temperature cold water sprayed at the second heat exchanger 22, the high-temperature cold water is contacted with the dry air to generate evaporation and absorb heat, and the temperature of the air is reduced to be low-temperature air; the low temperature air then passes through the third heat exchanger 23 and exchanges heat with the water therein, lowering the temperature of the water to achieve the purpose of preparing cold water, which is supplied to the load terminal 6 for use; the air then passes through the fourth heat exchanger 24 and is discharged after heat exchange with the water therein. The phase change latent heat generated by the heat and moisture exchange between the high-concentration salt solution and the air at the first heat exchanger 21 is transmitted to the fourth heat exchanger 24 through the heat dissipation circulation loop and is taken away by the air; the dehumidified low-concentration salt solution is conveyed to the third sprayer 251 through the salt solution circulation loop, heat required by salt solution regeneration is provided by the fifth heat exchanger 25 in the spraying process, on one hand, air flowing through the fifth heat exchanger 25 can absorb moisture in the low-concentration salt solution to enable the low-concentration salt solution to be regenerated into the high-concentration salt solution, on the other hand, air can absorb heat of water in the fifth heat exchanger 25 to enable the temperature of the water to be reduced, the water with the reduced temperature can be conveyed to the heat transfer heat exchanger 12 through the three-way control valve 7, the water conveying pipeline 4 and the water return pipeline 5, and the circulating operation is carried out in this way. It should be noted that the load terminal 6 refers to an air conditioner terminal in a house, an office building, a market, or the like; the high-temperature cold water refers to tap water, river water, lake water, seawater and the like.
As an optimized scheme, the energy station 1 of the present embodiment is provided with an oil-gas boiler 13, and the oil-gas boiler 13 is connected in parallel in a heat exchange circulation loop between the heat collection heat exchanger 11 and the heat transfer heat exchanger 12, wherein electromagnetic control valves are respectively arranged at two ports of the oil-gas boiler 13 and between connection points of the heat exchange circulation loop and two ports of the oil-gas boiler 13. According to the structure, when the heat energy provided by the distributed heat source 3 cannot meet the use requirement of the load tail end 6, the oil-gas boiler 13 is added into the heat exchange circulation loop by controlling each electromagnetic control to perform heat compensation, so that the stability and the reliability of the system are enhanced. As a specific embodiment, the present invention generally provides a plurality of heat collecting heat exchangers 11, and connects a plurality of heat collecting heat exchangers 11 in parallel in the heat exchange circulation loop. And the distributed heat source 3 refers to a ground source heat pump unit 31, a solar energy unit 32, a thermal power plant waste heat unit 33, an industrial waste heat unit 34, a waste heat boiler unit 35 and the like. In practical application, the present invention generally connects the ground source heat pump unit 31, the solar unit 32, the thermal power plant waste heat unit 33, the industrial waste heat unit 34 and the waste heat boiler unit 35 with the plurality of heat collecting heat exchangers 11 in a one-to-one correspondence, and respectively forms heat collecting circulation sub-loops for convenient control. Similarly, the present invention generally arranges a plurality of heat transfer heat exchangers 12, connects the plurality of heat transfer heat exchangers 12 in parallel in a heat exchange circulation loop, connects the plurality of heat transfer heat exchangers 12 with different load ends through corresponding heat supply circulation loops, and arranges a plurality of water chilling units 2 correspondingly at different load ends. For the purpose of energy storage and enhancing the stability and reliability of the system, the energy storage tanks 26 are arranged in the saline solution circulation loop, and the number of the energy storage tanks 26 is determined according to the actual requirement.
As a specific implementation mode, the invention is also provided with a controller 8 which is respectively connected with the energy station 1, the water chilling unit 2, the distributed heat source 3 and the three-way control valve 7. A first temperature sensor is arranged at a primary side water outlet of the heat collection heat exchanger 11, a second temperature sensor is arranged at a secondary side water outlet of the heat transfer heat exchanger 12, a third temperature sensor, a fourth temperature sensor, a fifth temperature sensor, a sixth temperature sensor and a seventh temperature sensor are correspondingly arranged at outlets of the ground source heat pump unit 31, the solar energy unit 32, the thermal power plant waste heat unit 33, the industrial waste heat unit 34 and the waste heat boiler unit 35, and the first temperature sensor, the second temperature sensor, the third temperature sensor, the fourth temperature sensor, the fifth temperature sensor, the sixth temperature sensor and the seventh temperature sensor are respectively connected with the controller 8. Through the structural arrangement, the temperature values at all positions can be accurately detected, and the operation of the system can be accurately controlled according to the temperature detection values.
It should be noted that in practical applications, the heat exchange circulation loop, the heat collection circulation loop, the heat supply circulation loop, the heat dissipation circulation loop, the spraying circulation loop, the saline solution circulation loop, and the connecting pipeline between the fifth heat exchanger 25 and the three-way control valve 7 are respectively provided with a circulation pump to provide a circulation driving force, and the specific position of the circulation pump should be determined according to practical needs. In order to reduce material cost, improve heat exchange efficiency and enhance corrosion resistance, the invention adopts the first heat exchanger 21, the third heat exchanger 23, the fourth heat exchanger 24 and the fifth heat exchanger 25 as inner cooling type plastic heat exchangers, and adopts the second heat exchanger 22 as a filler type plastic heat exchanger.
Based on the same conception, the invention also provides a control method of the distributed intelligent energy system, which specifically comprises the following steps:
under the working condition of heat supply in winter, the water chilling unit 2 is disconnected from the water supply pipeline 4 and the water return pipeline 5 by controlling the three-way control valves 7, and the secondary side of the heat transfer heat exchanger 12 is communicated with the load tail end 6 through a heat supply circulation loop.
And secondly, under the working condition of cooling in summer, the fifth heat exchanger 25 is connected with the secondary side of the heat transfer heat exchanger 12 through the water supply pipeline 4 and the water return pipeline 5 to form a regenerative heat circulation loop by controlling each three-way control valve 7, and the third heat exchanger 23 is connected with the load tail end 6 through the water supply pipeline 4 and the water return pipeline 5 to form a cooling circulation loop.
And thirdly, starting the system, stopping the oil and gas boiler 13, disconnecting the oil and gas boiler 13 from the heat exchange circulation loop by controlling each electromagnetic control valve, and respectively detecting the temperature of each corresponding position by the first temperature sensor, the second temperature sensor, the third temperature sensor, the fourth temperature sensor, the fifth temperature sensor, the sixth temperature sensor and the seventh temperature sensor.
And fourthly, when the temperature detection value of any one of the third temperature sensor, the fourth temperature sensor, the fifth temperature sensor, the sixth temperature sensor and the seventh temperature sensor is lower than that of the first temperature sensor, stopping the heat collection circulation sub-loop corresponding to the heat source.
Fifthly, when the temperature detection value of the second temperature sensor is lower than a preset first temperature threshold value, starting the oil-gas boiler 13, and controlling each electromagnetic control valve to enable the oil-gas boiler 13 to be added into the heat exchange circulation loop; when the temperature detection value of the second temperature sensor is higher than a preset second temperature threshold value, the oil and gas boiler 13 is stopped, and the connection between the oil and gas boiler 13 and the heat exchange circulation loop is disconnected by controlling each electromagnetic control valve. This way, the operation stability of the system is improved, and the energy-saving purpose is realized.
In the third step, if the working condition of heat supply in winter is the working condition, the water chilling unit 2 is stopped; if the working condition is summer cooling, the water chilling unit 2 is started.
The control method of the distributed intelligent energy system provided by the invention has the advantages of simple process and good energy-saving effect.
The above examples are only for describing the preferred embodiments of the present invention, and do not limit the scope of the claimed invention, and various modifications made by those skilled in the art according to the technical solutions of the present invention should fall within the scope of the invention defined by the claims without departing from the design concept of the present invention.
Claims (9)
1. A distributed intelligent energy system comprises an energy station (1) and a water chilling unit (2) arranged at the tail end of a load, and is characterized in that the energy station (1) comprises a heat collection heat exchanger (11) and a heat transfer heat exchanger (12), two ports on the primary side of the heat collection heat exchanger (11) and two ports on the primary side of the heat transfer heat exchanger (12) are sequentially connected to form a heat exchange circulation loop, two ports on the secondary side of the heat collection heat exchanger (11) are connected with a distributed heat source (3) to form a heat collection circulation loop, and two ports on the secondary side of the heat transfer heat exchanger (12) are correspondingly connected with the tail end (6) of the load through a water supply pipeline (4) and a water return pipeline (5) to form a heat supply circulation loop; the water chilling unit (2) comprises a first heat exchanger (21), a second heat exchanger (22), a third heat exchanger (23) and a fourth heat exchanger (24) which are sequentially arranged, two ports of the first heat exchanger (21) are connected with two ports of the fourth heat exchanger (24) to form a heat dissipation circulation loop, a first sprayer (211) and a first liquid collecting tank (212) are correspondingly arranged on the upper side and the lower side of the first heat exchanger (21), a second sprayer (221) and a second liquid collecting tank (222) are correspondingly arranged on the upper side and the lower side of the second heat exchanger (22), the second sprayer (221) and the second liquid collecting tank (222) are connected with a high-temperature cold water source (223) to form a spraying circulation loop, two ports of the third heat exchanger (23) are respectively connected with a water feeding pipeline (4) and a water return pipeline (5) correspondingly through a three-way control valve (7), the water chilling unit (2) further comprises a fifth heat exchanger (25), two ports of the fifth heat exchanger (25) are correspondingly connected with the water feeding pipeline (4) and the water return pipeline (5) through a three-way control valve (7) respectively, the upper side and the lower side of the fifth heat exchanger (25) are correspondingly provided with a third sprayer (251) and a third liquid collecting tank (252), and the third sprayer (251) and the third liquid collecting tank (252) are correspondingly connected with the first liquid collecting tank (212) and the first sprayer (211) to form a saline solution circulation loop; the energy station (1) further comprises an oil and gas boiler (13), the oil and gas boiler (13) is connected in parallel in a heat exchange circulation loop between the heat collection heat exchanger (11) and the heat transfer heat exchanger (12), and electromagnetic control valves are respectively arranged at two ports of the oil and gas boiler (13) and between connection points of the heat exchange circulation loop and the two ports of the oil and gas boiler (13).
2. The distributed intelligent energy system according to claim 1, wherein a plurality of heat collecting heat exchangers (11) are provided, and a plurality of heat collecting heat exchangers (11) are connected in parallel in the heat exchange circulation loop; the distributed heat source (3) comprises a ground source heat pump unit (31), a solar energy unit (32), a thermal power plant waste heat unit (33), an industrial waste heat unit (34) and a waste heat boiler unit (35).
3. The distributed intelligent energy system as claimed in claim 2, wherein the ground source heat pump unit (31), the solar unit (32), the thermal power plant waste heat unit (33), the industrial waste heat unit (34) and the waste heat boiler unit (35) are connected with the plurality of heat collection heat exchangers (11) in a one-to-one correspondence manner and respectively form a heat collection circulation sub-loop.
4. A distributed intelligent energy system according to claim 3, wherein a plurality of heat transfer heat exchangers (12) are provided, a plurality of heat transfer heat exchangers (12) are connected in parallel in a heat exchange circulation loop, the plurality of heat transfer heat exchangers (12) are respectively connected with different load terminals through corresponding heat supply circulation loops, and the water chilling unit (2) is provided with a plurality of heat transfer heat exchangers and correspondingly arranged at different load terminals.
5. The distributed intelligent energy system according to claim 4, wherein at least one energy storage tank (26) is disposed in the saline solution circulation loop.
6. The distributed intelligent energy system according to claim 5, further comprising a controller (8) connected to the energy station (1), the water chiller (2), the distributed heat source (3) and the three-way control valve (7), respectively; a first temperature sensor is arranged at a primary side water outlet of the heat collection heat exchanger (11), a second temperature sensor is arranged at a secondary side water outlet of the heat transfer heat exchanger (12), and a third temperature sensor, a fourth temperature sensor, a fifth temperature sensor, a sixth temperature sensor and a seventh temperature sensor are correspondingly arranged at outlets of the ground source heat pump unit (31), the solar unit (32), the thermal power plant waste heat unit (33), the industrial waste heat unit (34) and the waste heat boiler unit (35); the first temperature sensor, the second temperature sensor, the third temperature sensor, the fourth temperature sensor, the fifth temperature sensor, the sixth temperature sensor and the seventh temperature sensor are respectively connected with the controller (8).
7. The distributed intelligent energy system according to claim 5, wherein a circulating pump is respectively disposed in the heat exchange circulation loop, the heat collection circulation loop, the heat supply circulation loop, the heat dissipation circulation loop, the spraying circulation loop, the salt solution circulation loop, and the connection pipeline between the fifth heat exchanger (25) and the three-way control valve (7).
8. The distributed intelligent energy system according to claim 5, wherein the first heat exchanger (21), the third heat exchanger (23), the fourth heat exchanger (24) and the fifth heat exchanger (25) are inner-cooling plastic heat exchangers, and the second heat exchanger (22) is a filler-type plastic heat exchanger.
9. A method for controlling the distributed smart energy system according to claim 6, comprising the steps of:
under the working condition of heat supply in winter, the water chilling unit (2) is disconnected from the water supply pipeline (4) and the water return pipeline (5) by controlling the three-way control valves (7), and the secondary side of the heat transfer heat exchanger (12) is communicated with the load tail end (6) through a heat supply circulation loop;
secondly, under the working condition of cooling in summer, the fifth heat exchanger (25) is connected with the secondary side of the heat transfer heat exchanger (12) through a water supply pipeline (4) and a water return pipeline (5) to form a regenerative heat circulation loop by controlling each three-way control valve (7), and the third heat exchanger (23) is connected with the load tail end (6) through the water supply pipeline (4) and the water return pipeline (5) to form a cooling circulation loop;
thirdly, starting the system, stopping the oil and gas boiler (13), disconnecting the oil and gas boiler (13) from the heat exchange circulation loop by controlling each electromagnetic control valve, and respectively detecting the temperature of each corresponding position by a first temperature sensor, a second temperature sensor, a third temperature sensor, a fourth temperature sensor, a fifth temperature sensor, a sixth temperature sensor and a seventh temperature sensor;
fourthly, when the temperature detection value of any one of the third temperature sensor, the fourth temperature sensor, the fifth temperature sensor, the sixth temperature sensor and the seventh temperature sensor is lower than that of the first temperature sensor, stopping the heat collection circulation sub-loop corresponding to the heat source;
fifthly, when the temperature detection value of the second temperature sensor is lower than a preset first temperature threshold value, starting the oil-gas boiler (13), and controlling each electromagnetic control valve to enable the oil-gas boiler (13) to be added into the heat exchange circulation loop; when the temperature detection value of the second temperature sensor is higher than a preset second temperature threshold value, the oil-gas boiler (13) is stopped, and the connection between the oil-gas boiler (13) and the heat exchange circulation loop is disconnected by controlling each electromagnetic control valve;
in the third step, if the working condition of heat supply in winter is the working condition, the water chilling unit (2) is stopped; if the working condition is summer cooling, the water chilling unit (2) is started.
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| CN108387013A (en) * | 2018-01-09 | 2018-08-10 | 湘潭大学 | The multi-energy complementation system of natural gas-geothermal energy-solar energy coupling |
| CN108800272A (en) * | 2018-06-06 | 2018-11-13 | 天津大学 | A kind of operation method of provide multiple forms of energy to complement each other cooling and thermal power plant unit |
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| CN108387013A (en) * | 2018-01-09 | 2018-08-10 | 湘潭大学 | The multi-energy complementation system of natural gas-geothermal energy-solar energy coupling |
| CN108800272A (en) * | 2018-06-06 | 2018-11-13 | 天津大学 | A kind of operation method of provide multiple forms of energy to complement each other cooling and thermal power plant unit |
| CN208952262U (en) * | 2018-10-19 | 2019-06-07 | 际高科技有限公司 | A kind of solution-type evaporation water cooler |
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