EP4227586A1 - Pipe network heat storage system based on series connection of supply and return header pipes of heat supply network, and regulation and control method therefor - Google Patents

Pipe network heat storage system based on series connection of supply and return header pipes of heat supply network, and regulation and control method therefor Download PDF

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Publication number
EP4227586A1
EP4227586A1 EP21944423.9A EP21944423A EP4227586A1 EP 4227586 A1 EP4227586 A1 EP 4227586A1 EP 21944423 A EP21944423 A EP 21944423A EP 4227586 A1 EP4227586 A1 EP 4227586A1
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EP
European Patent Office
Prior art keywords
water
heat
network
pipe
heating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP21944423.9A
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German (de)
English (en)
French (fr)
Inventor
Xin Yong GAO
Li Jun ZHENG
Jing Jin
Hao Ran JU
Xiao Hong HE
Cheng Lei LI
Chang WU
Shi Yu LIANG
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Huadian Electric Power Research Institute Co Ltd
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Huadian Electric Power Research Institute Co Ltd
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Publication date
Priority claimed from CN202111626239.6A external-priority patent/CN114440288B/zh
Priority claimed from CN202111629309.3A external-priority patent/CN114440289B/zh
Application filed by Huadian Electric Power Research Institute Co Ltd filed Critical Huadian Electric Power Research Institute Co Ltd
Publication of EP4227586A1 publication Critical patent/EP4227586A1/en
Pending legal-status Critical Current

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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
    • 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
    • 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
    • F24D19/1021—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves a by pass valve
    • 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
    • F24D3/00—Hot-water central heating systems
    • 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
    • F24D3/00—Hot-water central heating systems
    • F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
    • F24D3/1083—Filling valves or arrangements for filling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/212—Temperature of the water
    • F24H15/215—Temperature of the water before heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/212—Temperature of the water
    • F24H15/219—Temperature of the water after heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/238—Flow rate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/242—Pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/305—Control of valves
    • F24H15/31—Control of valves of valves having only one inlet port and one outlet port, e.g. flow rate regulating valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/305—Control of valves
    • F24H15/325—Control of valves of by-pass valves
    • 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
    • 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
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/16—Waste heat

Definitions

  • the present disclosure relates to the technical field of central heating, in particular to a pipe network heat storage system based on series connection of a supply main pipe and a return main pipe in a heating network and a control method thereof.
  • the conventional solution for the low efficiency of the cogeneration heating system is to increase thermal energy storage equipment(s).
  • the excess heat can be stored through the heat storage technique when the load of the cogeneration unit is high, and the heat can be supplied to external device(s) through heat storage device(s) when the power peak regulation is difficult, thereby replenishing the insufficient heating capacity of the cogeneration unit caused by the reduced power generation load and improving the power peak regulation ability of the cogeneration unit.
  • this greatly increases the construction investment cost for enterprises.
  • the existing patent "Balance Adjustment Method and Heating System for Heat Storage and Release in Heat and Hydraulic Network” (Application No.: CN202110294128.3 ) discloses that a heating pipe network can be used to store heat, and the huge heating pipe network is a natural heat storage equipment. If the heating pipe network is used for heat storage to increase the peak regulation capacity of the cogeneration unit, huge construction investment costs can be saved with a significant economic benefit.
  • the number of heat stations in the heating system is too large using the technology of the existing patent, it shall need to add a large number of heating network water bypasses, valves and other related facilities, which also increases the construction investment cost to a certain extent, and at the same time, the control becomes complicated which makes the precise heating be difficult.
  • Embodiments of the present disclosure provide a pipe network heat storage system based on series connection of a supply main pipe and a return main pipe in a heating network and a control method thereof.
  • a second regulating valve and a second temperature-pressure-flowrate measuring instrument are arranged on a water inlet pipe connecting the heat station(s) with the primary network water supply pipe, and a third regulating valve and a temperature-pressure measuring instrument are arranged on a water outlet pipe connecting the heat station(s) with the primary network water return pipe; when the heat supply pipe network is storing heat and the water supply temperature of the heating network water is increased by the heating network initial station, the second regulating valve and the third regulating valve are used to be adjustably closed in order to reduce the flowrate of the heating network water entering the heat station(s) and increase the flowrate of the heating network water entering the heating network water bypass; and, when the heat supply pipe network is releasing heat and the water supply temperature of the heating network water is decreased by the heating network initial station, the second regulating valve and the third regulating valve are used to be adjustably open in order to increase the flowrate of the heating network water entering the heat station(s) and reduce the flowrate of the heating network water entering the heating network water bypass.
  • the pipe network heat storage system further comprises a water replenishing component including a primary network water replenishing pipe, a water replenishing pump, a fourth regulating valve and a third temperature-pressure-flowrate measuring instrument, in which the third temperature-pressure-flowrate measuring instrument, the water replenishing pump and the fourth regulating valve are arranged on the primary network water replenishing pipe in sequence along the water flow direction, and the primary network water replenishingpipe is connected to the primary network water return pipe;
  • a water replenishing component including a primary network water replenishing pipe, a water replenishing pump, a fourth regulating valve and a third temperature-pressure-flowrate measuring instrument, in which the third temperature-pressure-flowrate measuring instrument, the water replenishing pump and the fourth regulating valve are arranged on the primary network water replenishing pipe in sequence along the water flow direction, and the primary network water replenishingpipe is connected to the primary network water return pipe;
  • the heating network water bypass is arranged at the j th heat station, in which 1 ⁇ j ⁇ n, and the pressure measuring instrument is arranged on the primary network water return pipe connecting to the j th heat station.
  • the heating network water bypass is arranged at the j th heat station, and number j represented in the j th heat station can be calculated as follows:
  • the maximum value A max of number j can be determined according to the design head H 0 (unit: m) of the circulating water pump and the resistance loss of different pipe sections used to connect the heat supply pipe network with each heat station during the heating period, and the maximum value A max can be calculated as follows:
  • the minimum value B min of number j can be determined according to the minimum heat storage required by the heat supply pipe network, and the minimum value B min can be calculated as follows:
  • a second aspect of the present disclosure provides a pipe network heat storage control method based on series connection of a supply main pipe and a return main pipe in a heating network.
  • the control method uses any one of the aforementioned pipe network heat storage system and comprises the following steps:
  • the second regulating valve and the second temperature-pressure-flowrate measuring instrument are arranged on a water inlet pipe connecting the heat station(s) with the primary network water supply pipe, and the third regulating valve and the temperature-pressure measuring instrument are arranged on a water outlet pipe connecting the heat station(s) with the primary network water return pipe;
  • control method further comprises a water replenishing step:
  • the present disclosure achieves the following beneficial effects: the present disclosure provides a pipe network heat storage system and a control method thereof, which utilizes the heating network water bypass connecting the primary network water supply pipe with the primary network return water pipe to change the flowrate and temperature of heating network water through the heat station at an appropriate time, thereby realizing the function of storing heat by using the pipe network.
  • the heat storage capacity of the existing huge heating pipe network can be made full use to increase the peak regulation capacity of the cogeneration unit and can also save the huge investment cost of new energy storage devices.
  • part of the heating network water can be directly returned to the primary network water return pipe without passing through the heat station(s), which reduces the pressure loss of the heating system and effectively saves the power consumption of the circulating water pump; and, in the heat storage and release process, by adjusting the heating network water flowrate in the heating network water bypass, the heating network water flowrate required by each heat station can be ensured, which fully exerts the heat storage capacity of the existing heating pipe network and also effectively guarantees the heating requirement of each heat station.
  • FIG. 1 is a schematic diagram of a pipe network heat storage system provided in embodiments of the invention according to an embodiment of the present disclosure
  • the terms “installed”, “communicated”, “interconnected”, “coupled” and similar words in the present disclosure are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
  • the terms should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements.
  • the specific meanings of the above terms in the present invention can be understood in specific situations.
  • an embodiment of the present disclosure provides a pipe network heat storage system based on series connection of a supply main pipe and a return main pipe in a heating network.
  • the pipe network heat storage system comprises a heat supply pipe network where the heating network water flows.
  • the heat supply pipe network includes a heating network initial station 1, heat station(s) 2, a circulating water pump 3, a primary network water return pipe 4 and a primary network water supply pipe 5, in which the heating network initial station 1 is communicated with a primary network of the heat station(s) 2 through the primary network water return pipe 4 and the primary network water supply pipe 5.
  • the number of the heat station(s) 2 is n which is not less than 1.
  • the heating network water is driven by the circulating water pump 3 to flow among the heating network initial station 1, the heat station(s) 2, the primary network water return pipe 4 and the primary network water supply pipe 5.
  • the heating network initial station 1 is used to provide heat
  • the circulating water pump 3 is used to drive the heating network water to flow in the heating network.
  • the primary network water supply pipe 5 is connected with the heating network initial station 1 and a water inlet of the heat station(s) 2, and the high-pressure and high-temperature heating network water can be transported to the heat station(s) 2 through the primary network water supply pipe 5.
  • the primary network return pipe 4 is connected with a water outlet of the heat station(s) 2 and the heating network initial station 1, and the cooled and depressurized heating network water can be transported back to the heating network initial station 1 through the primary network return pipe 4.
  • the heating network water can be pressured and driven to enter the heating network initial station 1 by the circulating water pump 3, and then can be heated and transported back to the heat station(s) 2 for circulation.
  • the huge heat supply pipe network is used as a natural heat storage equipment. While the heat storage capacity of heat supply pipe network is achieved by increasing the water supply temperature of the heating network initial station 1, since the total heat output by the heating network initial station 1 is increased by the increasing the water supply temperature, the heating network water output by the heating network initial station 1 can only pass through the heat station(s) 2 for heat exchange and then can be returned to the heating network initial station 1. After the excess heat supplied by the heating network initial station 1 enters the heat station(s) 2, most of the heat is absorbed by the heat station(s) 2 and then supplied to outside, instead of being stored in heat supply pipe network, which causes the excessive heat supply of the heat station(s) 2 resulting in energy waste.
  • a heating network water bypass 6 is installed between the primary network water supply pipe 5 and the primary network water return pipe 4.
  • An adjustment component is arranged on the heating network water bypass 6 for adjusting the flowrate and pressure of the heating network water in the heating network water bypass 6.
  • the adjustment component comprises a first temperature-pressure-flowrate measuring instrument 61, a pressure relief device 63 and a first regulating valve 62 which are arranged on the heating network water bypass 6 in sequence along the water flow direction.
  • the first temperature-pressure-flowrate measuring instrument 61 is used to measure the temperature, pressure and flowrate of the heating network water flowing into the heating network water bypass 6, thus the heat of the heating network water passing through the heating network water bypass 6 can be calculated.
  • the first regulating valve 62 is used to adjust the flowrate of the heating network water in the heating network water bypass 6.
  • the first regulating valve 62 is used to be in a normally closed state to make the flowrate of the heating network water in the heating network water bypass 6 be zero when the heat supply pipe network is not storing or not releasing heat, the first regulating valve 62 can be adjustably open to make the flowrate of the heating network water in the heating network water bypass 6 be gradually increased while storing heat, and the first regulating valve 62 can be adjustably closed to make the flowrate of the heating network water in the heating network water bypass 6 be gradually decreased while releasing heat.
  • the control method of an opening degree of the first regulating valve 62 is as follows: the heat passing through the heating network water bypass 6 is equal to a value which is a heat difference between the heat supplied by the heating network initial station 1 and the heat flowing into each heat station 2.
  • the opening degree of the first regulating valve 62 can be adjusted according to the required heat passing through the heating network water bypass 6.
  • the heat supplied by the heating network initial station 1 and the heat required by each heat station 2 are both known parameters. While storing heat, the opening degree of the first regulating valve 62 can be increased so as to increase the flowrate of the heating network water flowing through the heating network water bypass 6. When the flowrate of the heating network water in the heating network water bypass 6 is needed as a maximum set value, the first regulating valve 62 can be fully opened. While releasing heat, the opening degree of the first regulating valve 62 can be reduced.
  • the opening degree of the first regulating valve 62 can be adjusted to a minimum opening degree, and the first regulating valve 62 can be completely closed, so that the flowrate of the heating network water in the heating network water bypass 6 can be reduced until to be zero. If there is no need to completely release the heat stored in heat supply pipe network, the opening degree of the first regulating valve 62 can be appropriately reduced so as to reduce the flowrate of the heating network water in the heating network water bypass 6 to a set value.
  • a pressure measuring instrument 41 is provided at an upstream position in the water flow direction of the primary network water return pipe 4, in which the upstream position is at the connection position between the heating network water bypass 6 and the primary network water return pipe 4.
  • the pressure measuring instrument 41 is used to measure the pressure of the heating network water in the primary network water return pipe 4.
  • the pressure relief device 63 is used to reduce the pressure of the heating network water in the heating network water bypass 6, thus the pressure of the high-temperature and high-pressure heating network water can be decreased to match with the pressure measured by the pressure measuring instrument 41, so that the heating network water can be smoothly returned to the primary network water return pipe 4 and then can be returned to the heating network initial station 1.
  • the pressure relief device 63 includes a throttle pressure reducing valve, an ejector pressure reducer and so on.
  • a pipe network heat storage control method comprises the following steps:
  • Heat storage in heat supply pipe network means that when the cogeneration unit needs to reduce its output capacity in the power grid peak regulation process, the output capacity can be reduced by increasing the heating extraction steam flowrate of the cogeneration unit.
  • the excess heat generated by the increased extraction steam flowrate of the cogeneration unit is stored by the pipe network heating system. Due to the increased extraction steam flowrate of the cogeneration unit, the heat supply of the heating network initial station 1 can be increased. If the hearing network water bypass 6 is not provided, the excess heat will be transported the to outside from the heat station(s) 2, resulting in waste.
  • the heat supply of the heating network initial station 1 is increased only by increasing the water supply temperature of the heating network water.
  • the first regulating valve 62 is controlled to be adjustably open, thus part of the heating network water in the primary network water supply pipe 5 does not flow into the heat station(s) 2 and can be directly returned to the primary network water return pipe 4 through the heating network water bypass 6, and the other part of the heating network water continues to flow through the heat station(s) 2.
  • the heat supply increased in the heating network initial station 1 can be stored among the primary network water return pipe 4, the heating network water bypass 6 and the primary network water supply pipe 5, and the heating network water corresponding to the increased heat supply can flow between the primary network water return pipe 4 and the primary network water supply pipe 5 to avoid waste.
  • the heat supply of the heat station(s) 2 remains unchanged.
  • the temperature and pressure of the heating network water in the primary network return pipe 4 are both relatively low. If the high pressure heating network water in the heating network water bypass 6 directly flows into the primary network water return pipe 4, it tends to cause uneven pressure, thereby affecting water return effect and increasing the burden of the circulating water pump 3.
  • the pressure relief device 63 is provided on the heating network water bypass 6, and the pressure relief device 63 is used to reduce the pressure of the high pressure heating network water in the heating network water bypass 6, thus the pressure can be decreased to match with the pressure of the heating network water in an upstream position of the primary network water return pipe 4, in which the upstream position is at the connection position between the primary network water return pipe 4 and the heating network water bypass 6, so that the water in the heating network water bypass 6 can normally flow into the primary network water return pipe 4 and then can be returned to the heating network initial station 1.
  • Heat release in heat supply pipe network means that when the cogeneration unit needs to increase its output capacity in the power grid peak regulation process, the output capacity can be increased by reducing the heating extraction steam flowrate of the cogeneration unit. Insufficient heat load caused by the reduced extraction steam flowrate of the cogeneration unit needs to be satisfied by the release of the stored heat in the pipe network heating system. As an example, the heat supply of the heating network initial station 1 is decreased only by reducing the water supply temperature of the heating network water.
  • the heat supply is decreased in the heating network initial station 1
  • the temperature of the heating network water is decreased, and the first regulating valve 62 is controlled to be adjustably closed, thus the flowrate of the heating network water flowing into the heating network water bypass 6 is decreased and the flowrate of the heating network water entering the heat station(s) 2 is increased, thus ensuring the heating load balance of the heat station(s) 2.
  • the first regulating valve 62 While the total heat supply of the heating network initial station 1 is equal to the total heat required by the heat station(s) 2, the first regulating valve 62 is completely closed. If there is still some heat stored in the pipe network heating system and there is a peak regulation demand to reduce the output capacity of the cogeneration unit, it is necessary to finish the heat release process of the heat supply pipe network and start the heat storage process, and at this time, the opening degree of the first regulating valve 62 can be increased and a new heat storage process can be started. It is worth noting that no matter whether the heat stored in the heat pipe network is completely released, according to the peak regulation demand, the heat release process shall be finished immediately and the heat storage process shall be started. That is, at the end of the heat release process, the heat supply pipe network can still have a remained heat store and can also completely release all the stored heat, according to the specific peak regulation demand.
  • the above-mentioned embodiments describe three adjustment methods for changing the heat supply of the heating network initial station 1.
  • the flowrate of the heating network water in the heat station(s) 2 needs to be adjusted when adopting the adjustment method for changing the water supply temperature of the heating network water in the heating network initial station 1. Therefore, a second regulating valve 21 and a second temperature-pressure-flowrate measuring instrument 23 are provided on a water inlet pipe connecting the heat station(s) 2 and the primary network water supply pipe 5, and a third regulating valve 22 and a temperature-pressure measuring instrument 24 are provided on a water outlet pipe connecting the heat station(s) 2 and the primary network water return pipe 4.
  • the second regulating valve 21 and the third regulating valve 22 are used to adjust the flowrate of the heating network water in the heat station(s) 2 and assist in adjusting the flowrate of the heating network water flowing through the heating network water bypass 6 at the same time.
  • the second temperature-pressure-flowrate measuring instrument 23 is used to measure the temperature, pressure and flowrate of the heating network water entering the heat station(s) 2
  • the temperature-pressure measuring instrument 24 is used to measure the temperature and pressure of the heating network water from the heat station(s) 2. According to the total heat supply of the heating network initial station 1 and the heat required by each heat station 2, the flowrate of the heating network water flowing into the heat station(s) 2 can be controlled by adjusting the opening degrees of the second regulating valve 21 and the third regulating valve 22 of each heat station 2.
  • the second regulating valve 21 and the third regulating valve 22 both use a directly regulated way so that the heating load balance of the heat station(s) 2 can be easier to be regulated.
  • the number of the second regulating valve 21, the second temperature-pressure-flowrate measuring instrument 23, the third regulating valve 22 and the temperature-pressure measuring instrument 24 matches with the number of the heat station(s) 2 respectively. If the number of the heat station 2 is n, each number of the second regulating valve 21, the second temperature-pressure-flowrate measuring instrument 23, the third regulating valve 22 and the temperature-pressure measuring instrument 24 is also n, in which n is not less than 1.
  • the second regulating valve 21 and the third regulating valve 22 are used to be adjustably closed when storing heat, so that the flowrate of the heating network water entering the heat station(s) 2 is decreased, and the flowrate of the heating network water flowing through the heating network water bypass 6 is increased.
  • the second regulating valve 21 and the third regulating valve 22 are used to be adjustably open when releasing heat, so that the flowrate of the heating network water entering the heat station(s) 2 is increased, and the flowrate of the heating network water flowing through the heating network water bypass 6 is decreased.
  • the second temperature-pressure-flowrate measuring instrument 23 and the temperature-pressure measuring instrument 24 are respectively provided on the water inlet pipe and the water outlet pipe of the heat station(s) 2.
  • the opening degrees of the second regulating valve 21 and the third regulating valve 22 can be adjusted to ensure the heating load balance in the heat station(s) 2.
  • a specific control method comprises the following steps:
  • a water outlet regulating valve 13 for adjusting the water supply flowrate of the heating network water is arranged on a water outlet of the heating network initial station 1
  • a water inlet regulating valve 14 for adjusting the water return flowrate of the heating network water is arranged on a water inlet of the heating network initial station 1.
  • the circulating water pump 3 is arranged at a position where the primary network water return pipe 4 is close to the water inlet of the heating network initial station 1.
  • a fifth temperature-pressure-flowrate measuring instrument 12 is provided at a water outlet of the heating network initial station 1 for measuring the temperature, pressure and flowrate of the heating network water from the heating network initial station 1.
  • a fourth temperature-pressure-flowrate measuring instrument 11 is provided at a water inlet of the heating network initial station 1 for measuring the temperature, pressure and flowrate of the heating network water entering the heating network initial station 1.
  • All regulating valves in the aforementioned embodiments are electric regulating valves, and all measuring instruments in the aforementioned embodiments are instruments in the internet of things, which can perform wireless remote transmission of measurement data.
  • each regulating valve in the embodiments means that the opening degree of each regulating valve is adjusted between fully open and fully closed state.
  • the opening degrees of the second regulating valve 21 and the third regulating valve 22 can be adjusted according to the heat required by the heat station(s) 2, so as to control the heat transferring into each heat station 2.
  • the heat of the heating network water bypass 6 is equal to a value which is the heat difference between the heat supply of the heating network initial first station 1 and the heat required by each heating station 2.
  • the opening degree of the first regulating valve 62 can be adjusted, in which the first regulating valve 62 can be fully opened, partially opened or fully closed.
  • the pipe network heat storage system further comprises a water replenishing component including a primary network water replenishing pipe 7, a water replenishing water pump 71, a fourth regulating valve 72 and a third temperature-pressure-flowrate measuring instrument 73, in which the third temperature-pressure-flowrate measuring instrument 73, the water replenishing pump 71 and the fourth regulating valve 72 are arranged on the primary network make-up water pipe 7 in sequence along the water flow direction.
  • the primary network make-up water pipe 7 is connected to the primary network water return pipe 4.
  • the fourth temperature-pressure-flowrate measuring instrument 11 is provided at an upstream position in the water flow direction of the primary network water return pipe 4, in which the upstream position is at the connection poisiton between the primary network make-up water pipe 7 and the primary network water return pipe 4. After the parameter of the heating network water being measured by the fourth temperature-pressure-flowrate measuring instrument 11, the heating network water flows through the connection position of the primary network water return pipe 4 and a primary network make-up water pipe 7.
  • the fourth regulating valve 72 is operated to be open when the water pressure in the primary network water return pipe 4 measured by the fourth temperature-pressure-flowrate measuring instrument 11 is lower than a set pressure, and the fourth regulating valve 72 is operated to be closed when the water pressure in the primary network water return pipe 4 measured by fourth temperature-pressure-flowrate measuring instrument 11 is not lower than the set pressure.
  • a specific water replenishing step comprises: according to a pressure value measured by the fourth temperature-pressure-flowrate measuring instrument 11, the fourth regulating valve 72 is operated to be open when the water pressure in the primary network water return pipe 4 is lower than the set pressure, and the water replenishing pump 71 replenishes water to the primary network water return pipe 4; and, the fourth regulating valve 72 is operated to be closed when the water pressure in the primary network water return pipe 4 is not lower than the set pressure, and the water replenishing pump 71 stops replenishing water.
  • the heating network water bypass 6 is arranged at the j th heat station 2, in which 1 ⁇ j ⁇ n, and the pressure measuring instrument 41 is arranged on the primary network water return pipe 4 connecting to the j th heat station 2.
  • the location of the heating network water bypass 6 can be optimized.
  • Number j represented in the j th heat station can be calculated as follows:
  • the maximum value A max of number j can be determined according to the design head H 0 (unit: m) of the circulating water pump 3 and the resistance loss of different pipe sections used to connect the heat supply pipe network with each heat station 2 during the heating period, and the maximum value A max can be calculated as follows:
  • the minimum value B min of number j can be determined according to the minimum heat storage required by the heat supply pipe network, and the minimum value B min can be calculated as follows:

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Management, Administration, Business Operations System, And Electronic Commerce (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)
EP21944423.9A 2021-12-28 2021-12-30 Pipe network heat storage system based on series connection of supply and return header pipes of heat supply network, and regulation and control method therefor Pending EP4227586A1 (en)

Applications Claiming Priority (3)

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CN202111626239.6A CN114440288B (zh) 2021-12-28 2021-12-28 基于热网供回母管串联的管网蓄热系统及其调控方法
CN202111629309.3A CN114440289B (zh) 2021-12-28 2021-12-28 基于热网旁路喷射减压的管网蓄热系统及其调控方法
PCT/CN2021/143346 WO2023123276A1 (zh) 2021-12-28 2021-12-30 基于热网供回母管串联的管网蓄热系统及其调控方法

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CN117267782B (zh) * 2023-11-22 2024-02-20 瑞纳智能设备股份有限公司 供热控制方法及装置
CN117787653A (zh) * 2024-01-22 2024-03-29 上海金联热电有限公司 母管制热电联产机组负荷分配方法、系统、介质及设备

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CN104180418A (zh) 2014-08-13 2014-12-03 华电电力科学研究院 一种应用于热网的直接蓄热系统及其蓄放热方法
JP2019515237A (ja) 2016-05-05 2019-06-06 ユニバーシティ オブ マリボルＵｎｉｖｅｒｓｉｔｙ Ｏｆ Ｍａｒｉｂｏｒ ヒートポンプの原理を利用して冷媒入口温度を高め、コジェネレーション発電所の効率を増加する方法および装置
CN106123086B (zh) 2016-07-06 2019-11-26 华北电力大学 带有蓄热装置的热电联产机组及其调峰方法
CN106894855B (zh) 2017-04-01 2017-12-08 晟源高科(北京)科技有限公司 一种基于热源端和热网综合调节的热电解耦改造及运行方法
CN207487723U (zh) 2017-10-13 2018-06-12 杭州绰美科技有限公司 一种分体式温压流监测仪
CN207893829U (zh) 2017-12-12 2018-09-21 华能国际电力股份有限公司丹东电厂 一种用于热电联产机组的分级蓄热系统
CN111396982B (zh) 2020-02-26 2021-04-13 华电电力科学研究院有限公司 一种热力耦合水力的热网平衡调节方法及供热系统
CN213364545U (zh) 2020-10-29 2021-06-04 西安热工研究院有限公司 一种用于热网循环水系统防腐防垢研究的装置
CN113108356B (zh) 2021-03-19 2022-06-07 华电电力科学研究院有限公司 一种用于热力网蓄放热的平衡调节方法及供热系统

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