CN111578368A - Heat supply pipe network hydraulic regulation and control system and intelligent control and heat supply charging method thereof - Google Patents
Heat supply pipe network hydraulic regulation and control system and intelligent control and heat supply charging method thereof Download PDFInfo
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Abstract
The invention discloses a heat supply pipe network hydraulic regulation and control system and an intelligent control and heat supply charging method thereof, and relates to a method for intelligently regulating, controlling and charging heat supply users of hydraulic power in a heat supply system, aiming at overcoming the problems of hydraulic imbalance of the heat supply pipe network, hydraulic imbalance of buildings and users and inaccurate charging caused by a plurality of existing heat supply systems.
Description
Technical Field
The invention relates to a heating system, in particular to a method for intelligently regulating and controlling water power in the heating system and charging a heating user.
Background
The heat supply enterprises generally have two heat supply modes of a hanging piece and terrestrial heat, and two different heat supply modes of one heat exchange station can exist at the same time. However, the operation parameters are just opposite, the heat supply of the hanging piece type building needs high temperature and small flow, the heat supply of the geothermal type building needs low temperature and large flow, and one set of heat supply unit is difficult to meet the heat supply modes of two forms.
The existing heat supply areas are all provided with the coexistence of the hanging piece type buildings and the geothermal type buildings, so that when two types of buildings are heated, different parameters required by different heating modes easily cause the problems of water imbalance of a heat supply pipe network, water imbalance of the buildings, water imbalance of users and the like.
In addition, as the heat is a commodity, the measurement is the premise of fair display and transaction, and the essential condition for realizing the satisfaction of both parties of the transaction is accurate measurement. At present, more than 90% of heat supply enterprises and users adopt an area charging method, and the rough metering method of pile estimation cannot display fairness and is difficult to satisfy the users.
Disclosure of Invention
The invention aims to solve the problems of heat supply network hydraulic imbalance, building hydraulic imbalance and user hydraulic imbalance caused by a plurality of existing heat supply systems and insufficient precision of charging, and provides a heat supply network hydraulic regulation and control system and an intelligent control and heat supply charging method thereof.
The invention relates to a heat supply pipe network hydraulic regulation and control system, which comprises a primary network water supply regulating valve, a secondary network water supply pressure sensor, a secondary network variable frequency circulating pump, a pre-building water supply flowmeter, a pre-building water supply temperature sensor, a pre-building return water temperature sensor, an indoor water supply regulating valve, an indoor temperature sensor, a pre-building pressure difference sensor, a pre-building metering control device and a remote regulation and control device, wherein the primary network water supply regulating valve is connected with the primary network water;
the primary network water supply regulating valve is arranged on the primary heat supply pipe network and used for regulating the water supply flow of the primary network so as to regulate the heat supply quantity conveyed from the primary heat supply pipe network to the secondary heat supply pipe network;
the secondary network water supply pressure sensor is arranged on a secondary network water supply pipe in the heat supply station and used for acquiring the water supply pressure of the secondary network;
the secondary network variable frequency circulating pump is arranged on a secondary network return pipe in the heat supply station and is used for adjusting the circulating water quantity of the secondary heat supply network;
the building front water supply variable frequency circulating pump is arranged on a building front water supply pipe and is used for adjusting the circulating water quantity of a building heat supply pipe network;
the building front water supply flowmeter is arranged on a building front water supply pipe and is used for collecting the water supply flow of a building heat supply pipe network;
the building front water supply temperature sensor is arranged on a building front water supply pipe and used for collecting the water supply temperature of a building heat supply pipe network;
the pre-building return water temperature sensor is arranged on the pre-building return water pipe and used for collecting the return water temperature of the building heat supply pipe network;
the indoor water supply regulating valve is arranged on the indoor water supply pipe and used for changing the circulating water quantity of the indoor heat supply pipe network through regulating the opening degree of the valve so as to regulate the indoor temperature of a heat supply user;
the indoor temperature sensors are distributed in the heat supply user rooms and used for collecting the temperature of each area in the heat supply user rooms so as to obtain the indoor temperature of the heat supply user, and the indoor temperature of the user is the average temperature of the temperature of each area in the heat supply user rooms;
the building front differential pressure sensor is arranged between a building front water supply pipe and a building front water return pipe and is used for acquiring the water pressure difference between water supply and water return of a building heat supply pipe network;
the pre-building metering control device is used for receiving the building heat supply pipe network data, uploading the data to the remote regulating and controlling device, and changing the working frequency of the pre-building water supply variable frequency circulating pump according to the frequency control signal sent by the remote regulating and controlling device; the building heat supply pipe network data comprises water supply flow data, water supply temperature data, water return temperature data, water pressure difference data, user indoor temperature data and valve opening data of the building heat supply pipe network;
and the remote regulation and control device is used for receiving the water supply pressure data of the secondary network and the building heat supply network data, and regulating the valve opening of the primary network water supply regulating valve, the working frequency of the secondary network variable frequency circulating pump and the working frequency of the pre-building water supply variable frequency circulating pump according to the water supply pressure data of the secondary network and the building heat supply network data.
The invention discloses a method for intelligently controlling a heat supply pipe network hydraulic regulation and control system, which comprises the following steps:
when the water injection pressure of the secondary heat supply pipe network is increased to be higher than a water injection pressure threshold value, starting a secondary network variable frequency circulating pump to enable the secondary heat supply pipe network to perform heat supply circulation; meanwhile, uploading heat supply data of each secondary heat supply pipe network to a remote regulation and control device; the heat supply data of the secondary heat supply pipe network comprises temperature data, pressure data and flow data of each node in the secondary heat supply pipe network; the node comprises a valve, an elbow, a compensator and a reducing pipe;
starting a water supply variable-frequency circulating pump in front of the building to enable a building heat supply pipe network to perform heat supply circulation; meanwhile, water supply flow data, water supply temperature data, return water temperature data and water pressure difference data of the building heat supply pipe network are uploaded to a remote regulation and control device;
when the indoor heat supply pipe network performs heat supply circulation, user indoor temperature data and valve opening data are uploaded to the remote control device;
step two, calculating heat supply indexes of corresponding buildings according to the outdoor temperature, the indoor temperature of the user and the heat supply area of the buildings, and determining the water supply temperature of a secondary heat supply pipe network according to the heat supply indexes;
step three, making the water supply temperature of the building adopting the hanging piece type heating device equal to the water supply temperature of a secondary heat supply pipe network, and setting a first differential pressure value according to the actual resistance of the building at the rated operation flow rate to ensure that the water pressure difference between water supply and return water is kept at the first differential pressure operation of the building rated operation flow rate;
in a building adopting the geothermal heat supply device, the water supply temperature is reduced to be equal to the water supply temperature of a secondary heat supply pipe network by 0.75 times through a water mixing pipe and an electric regulating valve in front of the building, and a second differential pressure value is set according to the actual resistance of the building at the rated operation flow so that the water pressure difference between water supply and return water is kept at the second differential pressure operation of the building rated operation flow;
the invention discloses a method for charging heat supply by utilizing a heat supply pipe network hydraulic regulation and control system, which comprises the following steps:
the method comprises the following steps that firstly, the indoor temperature of each area in a heat supply user room is collected through an indoor temperature sensor, so that the indoor temperature of the heat supply user is obtained, and the indoor temperature of the heat supply user is uploaded to a remote control device;
the indoor temperature of the user is the average temperature of the indoor temperature of each area of the heat supply user;
and step two, calculating the accumulated indoor temperature of the heat supply users, and calling corresponding user heat supply areas and charging formulas pre-stored in the remote control device to obtain heat supply cost.
The invention has the beneficial effects that: the system not only fundamentally solves the problems of different parameters required by different heat supply modes, but also can solve the problems of hydraulic imbalance of a heat supply pipe network, hydraulic imbalance of buildings and hydraulic imbalance of users, overcomes the defects of difficult adjustment, uneven cold and heat and large energy consumption, and lays a good foundation for popularizing the heat metering of a user end to realize heat utilization according to needs. The system saves 20-35% of electric energy and more than 10% of heat energy, reduces the labor intensity of workers and reduces the energy waste.
The method adopts a temperature area metering method, charges according to the indoor temperature of the area of a resident, is simple and intuitive, and is easy to accept by users, different house structures and different indoor temperatures charge different heat fees, and the users adjust the heat consumption according to the comfort level of the users, and save the heat by more than 10 percent compared with the heat consumption of the existing heating system.
Drawings
FIG. 1 is a schematic structural diagram of a secondary heat supply pipe network hydraulic regulation system of the present invention; the left building is an geothermal building, and the right building is a hanging piece building.
Detailed Description
In a first specific embodiment, the heat supply pipe network hydraulic regulation and control system of the embodiment comprises a first-level network water supply regulating valve 9, a second-level network water supply pressure sensor 10, a second-level network variable frequency circulating pump 11, a pre-building water supply variable frequency circulating pump 12, a pre-building water supply flowmeter 13, a pre-building water supply temperature sensor 14, a pre-building return water temperature sensor 15, an indoor water supply regulating valve 16, an indoor temperature sensor 17, a pre-building differential pressure sensor 18, a pre-building metering control device 19 and a remote regulation and control device 20;
the primary network water supply regulating valve 9 is arranged on the primary heat supply pipe network and is used for regulating the water supply flow of the primary network so as to regulate the heat supply quantity transmitted from the primary heat supply pipe network to the secondary heat supply pipe network;
the secondary network water supply pressure sensor 10 is arranged on a secondary network water supply pipe 1 in the heat supply station and is used for acquiring the secondary network water supply pressure;
the secondary network variable frequency circulating pump 11 is arranged on the secondary network return water pipe 2 in the heat supply station and is used for adjusting the circulating water quantity of the secondary heat supply network;
the building front water supply variable frequency circulating pump 12 is arranged on the building front water supply pipe 4 and is used for adjusting the circulating water quantity of a building heat supply pipe network;
the building front water supply flowmeter 13 is arranged on the building front water supply pipe 4 and is used for collecting the water supply flow of a building heat supply pipe network;
the pre-building water supply temperature sensor 14 is arranged on the pre-building water supply pipe 4 and is used for collecting the water supply temperature of a building heat supply pipe network;
the pre-building return water temperature sensor 15 is arranged on the pre-building return water pipe 5 and used for collecting the return water temperature of the building heat supply pipe network;
the indoor water supply regulating valve 16 is arranged on the indoor water supply pipe 6 and is used for changing the circulating water quantity of an indoor heat supply pipe network through regulating the opening degree of the valve so as to regulate the indoor temperature of a heat supply user;
the indoor temperature sensors 17 are distributed in the heating user rooms and used for collecting the temperature of each area in the heating user rooms so as to obtain the indoor temperature of the heating user, wherein the indoor temperature of the user is the average temperature of the temperature of each area in the heating user rooms;
the pre-building differential pressure sensor 18 is arranged between the pre-building water supply pipe 4 and the pre-building water return pipe 5 and is used for acquiring the water pressure difference between water supply and water return of a building heat supply pipe network;
the pre-building metering control device 19 is used for receiving the building heat supply pipe network data, uploading the data to the remote control device 20, and changing the working frequency of the pre-building water supply variable frequency circulating pump 12 according to the frequency control signal sent by the remote control device 20; the building heat supply pipe network data comprises water supply flow data, water supply temperature data, water return temperature data, water pressure difference data, user indoor temperature data and valve opening data of the building heat supply pipe network;
and the remote regulating and controlling device 20 is used for receiving the water supply pressure data of the secondary network and the building heat supply network data, and regulating the valve opening of the primary network water supply regulating valve 9, the working frequency of the secondary network variable frequency circulating pump 11 and the working frequency of the pre-building water supply variable frequency circulating pump 12 according to the water supply pressure data of the secondary network and the building heat supply network data.
The pipe network comprises a secondary heat supply pipe network, a plurality of groups of building heat supply pipe networks and a plurality of groups of indoor heat supply pipe networks; each building corresponds to a group of building heat supply pipe networks, each heat supply user corresponds to a group of indoor heat supply pipe networks, and each building comprises a plurality of heat supply users;
the secondary heat supply pipe network comprises a secondary network water supply pipe 1 and a secondary network water return pipe 2, and the primary heat supply pipe network transfers heat to the secondary heat supply pipe network through a heat exchanger 3;
the building heat supply pipe network comprises a building front water supply pipe 4 and a building front water return pipe 5, wherein one end of the building front water supply pipe 4 is communicated with the second-level network water supply pipe 1, and one end of the building front water return pipe 5 is communicated with the second-level network water return pipe 2;
the indoor heat supply pipe network comprises an indoor water supply pipe 6 and an indoor water return pipe 7, one end of the indoor water supply pipe 6 is communicated with the other end of the building front water supply pipe 4, the other end of the indoor water supply pipe 6 is communicated with one end of the indoor water return pipe 7 through an indoor heat supply device 8, and the other end of the indoor water return pipe 7 is communicated with the other end of the building front water return pipe 5;
the water supply of the secondary heat supply pipe network is cooled to return water after sequentially passing through a secondary network water supply pipe 1, a building front water supply pipe 4, an indoor water supply pipe 6 and an indoor heat supply device 8, and the return water is heated to supply water after sequentially passing through an indoor return pipe 7, a building front return pipe 5, a secondary network return pipe 2 and a heat exchanger 3, so that heat supply circulation is formed.
Further, the indoor heating device 8 is a hanging-piece type heating device.
Further, the indoor heating device 8 is a geothermal heating device;
the regulation and control system further comprises a water mixing valve 21, the water mixing valve 21 is arranged on the water mixing pipe 26, the water mixing pipe 26 is communicated with the building front water supply pipe 4 and the building front water return pipe 5, and one end of the water mixing pipe communicated with the building front water supply pipe 4 is positioned in front of an inlet of the building front water supply variable-frequency circulating pump 12.
Furthermore, the water replenishing device also comprises a water replenishing pipe network;
the water replenishing pipe network comprises a water replenishing tank 22, a water replenishing pipeline 23 and a water replenishing pump 24;
the water replenishing tank 22 is communicated with a secondary network water return pipe 2 in the station through a water replenishing pipeline 23, and the water replenishing pump 24 is arranged on the secondary network water return pipe 2.
Further, a meteorological data acquisition module 25 is also included;
the meteorological data acquisition module 25 is used for detecting and outputting meteorological data to the remote control device 20, and the meteorological data includes outdoor temperature, solar radiation, wind direction and wind speed.
In a second embodiment, the method for performing intelligent control by using the hydraulic regulation and control system of the heat supply pipe network includes the following steps:
when the water injection pressure of the secondary heat supply pipe network is increased to be higher than a water injection pressure threshold value, starting a secondary network variable frequency circulating pump to enable the secondary heat supply pipe network to perform heat supply circulation; meanwhile, uploading heat supply data of each secondary heat supply pipe network to a remote regulation and control device; the heat supply data of the secondary heat supply pipe network comprises temperature data, pressure data and flow data of each node in the secondary heat supply pipe network; the node comprises a valve, an elbow, a compensator and a reducing pipe;
starting a water supply variable-frequency circulating pump in front of the building to enable a building heat supply pipe network to perform heat supply circulation; meanwhile, water supply flow data, water supply temperature data, return water temperature data and water pressure difference data of the building heat supply pipe network are uploaded to a remote regulation and control device;
when the indoor heat supply pipe network performs heat supply circulation, user indoor temperature data and valve opening data are uploaded to the remote control device;
step two, calculating heat supply indexes of corresponding buildings according to the outdoor temperature, the indoor temperature of the user and the heat supply area of the buildings, and determining the water supply temperature of a secondary heat supply pipe network according to the heat supply indexes;
step three, making the water supply temperature of the building adopting the hanging piece type heating device equal to the water supply temperature of the secondary heat supply pipe network, and keeping the water pressure difference between the water supply and the backwater at the actual resistance operation of the rated operation flow of the building, preferably keeping the water pressure difference between the water supply and the backwater at 0.01 Mpa;
the water supply temperature of the building adopting the geothermal heat supply device is equal to the water supply temperature of the secondary heat supply pipe network by 0.75 time, and the water pressure difference between the water supply and the return water is kept at the actual resistance operation of the rated operation flow of the building, preferably, the water pressure difference between the water supply and the return water is kept at 0.05 MPa.
And the flow of the hanging piece type heating device is 0.75 time of that of the geothermal type heating device.
Further, the water injection pressure threshold is 0.3 MPa.
Further, the opening degree of the valve is 0-100%, and the indoor temperature of a user is 8-28 ℃;
further, the third step also includes a method for compensating the heat consumption of the building by using meteorological data, and the method comprises the following steps:
when the sunlight radiation amount is increased, the rotating speed of the variable-frequency circulating pump of the secondary network is reduced, so that the circulating water amount of the secondary heat supply network is reduced, the water supply temperature is increased, and when the water supply temperature is higher than a temperature set value, the opening degree of the water supply regulating valve of the primary network is reduced, so that the water supply flow of the primary heat supply network is reduced, the heat supply amount of the primary heat supply network to the secondary heat supply network is further reduced, and the water supply temperature of the secondary heat supply network is kept unchanged at the temperature set value;
when the sunshine radiant quantity reduces or/and wind-force increase, improve the rotational speed of second grade net frequency conversion circulating pump, make second grade heat supply pipe network circulation water yield increase, the water supply temperature reduces, when the water supply temperature is less than the temperature set value, make the aperture increase of first grade net water supply governing valve, make the water supply flow of first grade heat supply pipe network increase, and then increase the heat supply volume that first grade heat supply pipe network carried to second grade heat supply pipe network, make the water supply temperature of second grade heat supply pipe network keep the temperature set value unchangeable.
In a third embodiment, the method for charging for heat supply by using the hydraulic regulation and control system of the secondary heat supply pipe network in this embodiment includes the following steps:
the method comprises the following steps that firstly, the indoor temperature of each area in a heat supply user room is collected through an indoor temperature sensor, so that the indoor temperature of the heat supply user is obtained, and the indoor temperature of the heat supply user is uploaded to a remote control device;
the indoor temperature of the user is the average temperature of the indoor temperature of each area of the heat supply user;
and step two, calculating the accumulated indoor temperature of the heat supply users, and calling corresponding user heat supply areas and charging formulas pre-stored in the remote control device to obtain heat supply cost.
Specifically, the present system is set forth as follows:
structure and function of system
Internal structure of heat exchange station
1. A primary water supply regulating valve 9 is arranged on a primary water supply pipeline of a primary heat supply pipe network in the heat exchange station to regulate the heat transmitted from the primary heat supply pipe network to a secondary heat supply pipe network.
2. The outlet of the heat exchanger 3 in the heat exchange station and the inlet of the second-level network variable-frequency circulating pump 11 are provided with the coupling pipe 27, the coupling pipe is communicated with a second-level heat supply pipe network outside the heat exchange station, the lift of the second-level network variable-frequency circulating pump 11 is much lower than that of the original heat supply mode, and the heat exchanger, the valve, the dirt remover and the pipeline resistance in the heat exchange station can be overcome.
(II) building heating pipe network structure
1. The metering control device 19 is arranged in front of the building, the heat of each building or each user is adjusted according to the requirements of the building or the users, and signals are fed back to the remote control device 20, so that the heat supply load of the primary heat supply pipe network is adjusted.
2. The building front water supply variable frequency circulating pump 12 is arranged on the building front water supply pipe 4, and the power of the building front water supply variable frequency circulating pump 12 is selected according to the resistance of a secondary heat supply pipe network at the position of a building, the self resistance of the building and the heat load.
3. In the geothermal building, a water mixing pipe 26 and a water mixing valve 21 are arranged between an inlet of a pre-building water supply variable frequency circulating pump 12 and a pre-building water return pipe 5 and are used for adjusting the water supply temperature of the geothermal building; hanging piece type building is not needed.
4. The building heat supply pipe network can also be provided with a heat meter for metering the actual heat consumption of the building, and the actual heat consumption of the building can also be calculated through the water supply flow, the water supply temperature and the return water temperature.
(III) indoor heating pipe network structure
1. The original indoor heating facility is unchanged, and the indoor temperature of a heat supply user is uploaded according to a plurality of temperature measuring points (indoor temperature sensors 17) arranged indoors of the house structure; the indoor temperature remote controller can also adopt intelligent household control and is used for setting the indoor temperature of a heat supply user by controlling the valve opening of the indoor water supply regulating valve 16.
2. The indoor water supply pipe 6 is provided with a remotely controllable indoor water supply regulating valve 16.
(IV) remote control device
1. The remote control device 20 is located in a central control room, comprises a server (or a cloud server), a console and control software, and realizes the automatic adjustment of hydraulic balance; the system comprises a server or a cloud terminal, wherein the server or the cloud terminal is used for collecting heat supply network data and uploading the heat supply network data, the heat supply data are analyzed in real time, an adjustment control rule is searched, heat supply according to needs is achieved, and energy waste is reduced.
2. The meteorological data acquisition module 25 is a satellite meteorological station or other meteorological data acquisition devices installed at a reasonable position in a city, acquires meteorological data information such as illuminance, wind direction and wind speed, uploads the meteorological data information to the remote control device 20, and adds heat energy given by nature into a heat supply network.
Second, control logic and principle of system
1. The principle of adjusting the operation of the heat supply network is as follows:
the heat supply network adopts the principle that the highest water supply temperature exists under the minimum circulation flow, and adjusts the flow in real time (saves electric energy) in a staged manner (reduces the expansion and contraction times of a pipe network) and with constant temperature supply.
2. Description of system control logic:
the combined type heat supply user hydraulic balance step-by-step intelligent control system has control logic which penetrates through the energy saving concept to the maximum extent from front to back, and realizes automation and intellectualization through analysis. The heating system is additionally provided with a circulating pump step by step (namely, a step-by-step mode), the power of the circulating pump in the heating station is reduced, and the resistance of a pipe network is reduced by canceling a pre-building regulating valve, so that the best method for saving electric energy is provided; adherence to the principle of 'highest water supply temperature under minimum circulation flow of a heat supply network' is also a favorable measure for saving electric energy; the method is a good method for reducing energy consumption by using meteorological station data as a regulation signal and adding natural energy into a heat supply network; the optimal scheme for realizing heat supply on demand is to analyze heat supply data by adopting artificial intelligence and search for regulation and control rules.
3. Principle of heat supply control
(1) Hydraulic intelligent regulation and control and household heat charging system (system for short) of secondary heat supply pipe network
And starting a secondary network variable-frequency circulating pump in the heat supply station after the water injection pressure of the secondary heat supply network is increased to 0.3 MPa. Equipment operation data in the heat supply station is uploaded to a platform (a remote control device 20), and a heat supply pipe network and operation parameter uploading platform for each node (a valve, an elbow, a compensator and a reducing) such as temperature, pressure, flow and the like are uploaded. The outdoor temperature, the solar radiation degree, the wind power, the wind speed and other information of the meteorological station (meteorological data acquisition module 25) are transmitted to the platform, and the remote control device 20 reads the user area and the indoor temperature.
(2) Automatic control device in front of building
The pre-building metering control device 19 starts the pre-building water supply variable frequency circulating pump 12, and the building heat supply pressure, flow, temperature and heat are transmitted back to the remote control device 20 through the pre-building automatic control device.
(3) User automatic control acquisition device
The operation parameters such as the indoor temperature of the heat supply user, the opening degree of the indoor water supply regulating valve 16d and the like are transmitted back to the remote control device 20 through the pre-building metering control device 19.
(4) Automatic control logic
And calculating the water supply temperature required by the hanging piece type building according to the relation between the outdoor temperature and the indoor temperature, wherein the water supply temperature of the hanging piece type building is the water supply temperature of the secondary heat supply pipe network.
According to heat supply user indoor temperature (user indoor temperature is set for according to the demand by oneself) calculate the average temperature of building, building heat meter provides the building heat consumption (or calculates the building heat consumption through water supply flow, water supply temperature and return water thermometer), weather station (meteorological data acquisition module 25) provides outdoor average temperature, and remote control device 20 provides the building heat supply area, calculates the heat supply index of building.
The calculation formula is as follows:
W＝GJ/m20.0036/load ratio/24 × 1000
W is a heat supply index, m2Heat supply area, GJ heat.
Load ratio (indoor temperature-outdoor temperature)/(indoor temperature + outdoor temperature)
The remote control device 20 compensates the heat for the building according to the sunshine radiation degree, wind power, wind direction and other information provided by the meteorological data acquisition module 25. When the sunshine radiant quantity increases, reduce the 11 revolutions of second grade net frequency conversion circulating pump in the heat supply station, the circulating water yield of second grade heat supply pipe network reduces, the water supply temperature risees, when the water supply temperature of second grade heat supply pipe network exceeds the temperature setting value, one-level net water supply governing valve 9 on the one-level heat supply pipe network closes for a short time, the water supply flow of one-level heat supply pipe network reduces, the water supply temperature of second grade heat supply pipe network gets back to the temperature setting value, reduces heat source heat supply volume.
The radiant quantity of sunshine reduces or wind-force increases, the revolution increase of second grade net frequency conversion circulating pump 11 in the heat supply station, the circulating water yield increase of second grade heat supply pipe network, the water supply temperature of second grade heat supply pipe network reduces, when the water supply temperature of second grade heat supply pipe network is less than the temperature setting value, the one-level net water supply governing valve 9 of one-level heat supply pipe network is opened greatly, increase one-level heat supply pipe network, the water supply temperature who makes second grade heat supply pipe network rises back to the temperature setting value, heat source heat supply capacity increases.
Because of the change of factors such as outdoor temperature, sunshine, wind power, etc., the water supply temperature of the secondary heat supply pipe network changes along with the change, and the primary pipe network water supply regulating valve 9 of the primary heat supply pipe network links along with the change, the water supply temperature of the secondary heat supply pipe network is kept unchanged at a temperature set value, thereby realizing the effective utilization of external energy.
The water supply variable frequency circulating pump 12 in front of the building of the hanging piece type building theoretically keeps the water pressure difference between the water supply and the water return to be operated at 0.01 MPa; the water pressure difference between water supply and return water of the front water supply variable-frequency circulating pump 12 of the geothermal building is theoretically kept to be 0.05MPa for operation (the water pressure difference for operation can be set according to the actual resistance of the building). When the indoor temperature of a heat supply user is adjusted by a user, the circulating water quantity of the building can be automatically adjusted along with the water pressure difference between water supply and return water, so that the circulating water consumption of the user is ensured, and the heat required by the user is ensured. And the principle of selecting the variable frequency circulating pump 12 for supplying water in front of the building is that the flow is large and the lift is small.
The water supply temperature of the geothermal building is kept to be 0.75 times of the water supply temperature of the secondary heat supply pipe network, and when the water supply temperature of the building is higher than 0.75 times of the water supply temperature of the secondary heat supply pipe network, the opening degree of a water mixing valve 21 of the building heat supply pipe network is increased; when the water supply temperature of the building is lower than 0.75 times of the water supply temperature of the secondary heat supply pipe network, the opening degree of the water mixing valve 21 of the building heat supply pipe network is reduced. The geothermal building is enabled to always keep running at 0.75 times of the temperature supplied by the secondary network, the water supply temperature of the secondary heat supply network of the geothermal building is adjusted by the water mixing valve to be not more than 55 ℃ for running, and the service life of the geothermal pipe can be reduced when the geothermal pipe runs for a long time at the temperature of more than 55 ℃. The temperature of the hanging-piece type heat supply building is the same as that of the second-level heat supply pipe network, and the water mixing valve 21 is not installed.
The user controls the indoor temperature of the heat supply user through a temperature controller (such as a remote controller, a control panel of an intelligent home and the like), and the indoor temperature of the heat supply user is controlled by adjusting the opening degree of the indoor water supply adjusting valve 16. The adjusting range of the temperature controller is 8-28 ℃, and the corresponding opening degree of the water supply adjusting valve 16 is 0-100%. When the water supply regulating valve 16 is closed to 0 position by a user, building resistance is increased, the outlet pressure of the pre-building water supply variable-frequency circulating pump 12 is increased, and when the water pressure difference between water supply and return water exceeds a set value, the frequency converter of the pre-building water supply variable-frequency circulating pump 12 automatically reduces the motor revolution of the pre-building water supply variable-frequency circulating pump 12, so that the water pressure difference between the water supply and the return water is reduced to the set value; when a user opens the indoor water supply regulating valve 16 to 100%, the building resistance is reduced, the pressure at the outlet of the pre-building water supply variable-frequency circulating pump 12 is reduced, and when the water pressure difference between water supply and return water is lower than a set value, the frequency converter of the pre-building water supply variable-frequency circulating pump 12 automatically raises the motor revolution of the pre-building water supply variable-frequency circulating pump 12, so that the water pressure difference between the water supply and the return water is raised to the set value; no matter which user adjusts the 16 apertures of the indoor water supply regulating valve of oneself, can not influence other users' normal flow, and the indoor temperature of heat supply user is controlled according to the comfort level of oneself needs by oneself to the realization is heated as required.
4. Water supply temperature determination for secondary heat supply pipe network
The principle of determining the water supply temperature of the secondary heat supply pipe network is 'the highest water supply temperature under the minimum circulation flow of the heat supply network'. The water supply temperature of the hanging piece type building is the same as that of the secondary heat supply pipe network, the water supply temperature of the geothermal building is determined according to heat supply regulations, and the water mixing valve 21 in front of the building is automatically adjusted according to preset control logic.
5. User indoor temperature determination
The user can adjust user's indoor temperature by oneself according to the comfort level of oneself, in total temperature range, does not receive heating system's control.
6. Control of heat supply to heat exchange station
The heat supply of the heat exchange station is supplied according to the needs of users, heat compensation is carried out according to meteorological data (sunlight radiation quantity, wind power, outdoor temperature and the like) transmitted back by a meteorological data acquisition module 25 (meteorological station), the ventilation coefficient of the users affected by the wind power is increased, and the heat exchange station automatically increases heat for compensation; the indoor temperature of the user is raised by the heat of the solar radiation, and the heat exchange station automatically reduces the heat to keep the indoor temperature of the user unchanged.
Third, charging method based on temperature area
The main reasons for adopting the charging method of the temperature area instead of the heat metering method for individual household are as follows:
firstly, when a user adjusts the indoor temperature, the problem of hydraulic imbalance of a heat supply pipe network is difficult to solve;
secondly, the heat product is conducted to special heat between households and is difficult to divide;
thirdly, the heat consumption of the side roof building is 1.5-2 times of that of the middle resident, and the same heat consumption at the same temperature is different, so that the same heat fee cannot be displayed fairly.
The charging method for the temperature area is as follows:
1. measuring method
Temperature measuring points (indoor temperature sensors 17) are installed at the same positions in the same room, the accumulated amount and the area of the indoor temperature (average temperature) of the user are extracted to be used as charging bases, the information of the indoor temperature and the area of the user is uploaded to the automatic heat fee accounting system of the remote control device 20, and a charging meter can be installed in a stairway to display the information of the heat user in real time so as to be convenient for the user to check.
2. User metering adjustment device
Each household is provided with one electric control valve, a plurality of temperature measuring points (indoor temperature sensors 17) are arranged according to the house structure, and one remote controller is arranged. And an intelligent control box can be additionally arranged in each household for data acquisition.
3. Control mode
Indoor temperature is displayed on a personal terminal (a mobile phone and the like) or a remote controller, and a user can adjust the indoor temperature on the mobile phone or the remote controller, wherein the indoor temperature adjusting range is 8-28 ℃, and the opening degree of the corresponding indoor water supply adjusting valve 16 is 0-100%. When the user is not at home, the indoor temperature can be reduced by using the mobile phone, and the indoor temperature can be increased by using the personal terminal (the mobile phone) before the user returns home.
Claims (10)
1. The heat supply pipe network hydraulic regulation and control system is characterized by comprising a primary network water supply regulating valve (9), a secondary network water supply pressure sensor (10), a secondary network frequency conversion circulating pump (11), a pre-building water supply frequency conversion circulating pump (12), a pre-building water supply flowmeter (13), a pre-building water supply temperature sensor (14), a pre-building return water temperature sensor (15), an indoor water supply regulating valve (16), an indoor temperature sensor (17), a pre-building differential pressure sensor (18), a pre-building metering control device (19) and a remote regulation and control device (20);
the primary network water supply regulating valve (9) is arranged on the primary heat supply pipe network and is used for regulating the water supply flow of the primary network so as to regulate the heat supply quantity transmitted from the primary heat supply pipe network to the secondary heat supply pipe network;
the secondary network water supply pressure sensor (10) is arranged on a secondary network water supply pipe (1) in the heat supply station and is used for collecting the secondary network water supply pressure;
the secondary network variable frequency circulating pump (11) is arranged on a secondary network return water pipe (2) in the heat supply station and is used for adjusting the circulating water quantity of a secondary heat supply network;
the building front water supply variable frequency circulating pump (12) is arranged on the building front water supply pipe (4) and is used for adjusting the circulating water quantity of a building heat supply pipe network;
the building front water supply flowmeter (13) is arranged on the building front water supply pipe (4) and is used for collecting the water supply flow of a building heat supply pipe network;
the building front water supply temperature sensor (14) is arranged on a building front water supply pipe (4) and is used for collecting the water supply temperature of a building heat supply pipe network;
the front-floor return water temperature sensor (15) is arranged on the front-floor return water pipe (5) and is used for collecting the return water temperature of the building heat supply pipe network;
the indoor water supply regulating valve (16) is arranged on the indoor water supply pipe (6) and is used for changing the circulating water quantity of an indoor heat supply pipe network through regulating the opening degree of the valve so as to regulate the indoor temperature of a heat supply user;
the indoor temperature sensors (17) are distributed in the heat supply user rooms and used for collecting the temperature of each area in the heat supply user rooms so as to obtain the indoor temperature of the heat supply user, and the indoor temperature of the user is the average temperature of the temperatures of each area in the heat supply user rooms;
the building front differential pressure sensor (18) is arranged between a building front water supply pipe (4) and a building front water return pipe (5) and is used for acquiring the water pressure difference between water supply and water return of a building heat supply pipe network;
the pre-building metering control device (19) is used for receiving building heat supply pipe network data, uploading the data to the remote control device (20), and changing the working frequency of the pre-building water supply variable frequency circulating pump (12) according to a frequency control signal sent by the remote control device (20); the building heat supply pipe network data comprises water supply flow data, water supply temperature data, return water temperature data, water pressure difference data, user indoor temperature data and valve opening data of the building heat supply pipe network;
the remote control device (20) is used for receiving the water supply pressure data of the secondary network and the building heat supply network data, and adjusting the valve opening of the primary network water supply adjusting valve (9), the working frequency of the secondary network variable frequency circulating pump (11) and the working frequency of the pre-building water supply variable frequency circulating pump (12) according to the water supply pressure data of the secondary network and the building heat supply network data.
2. The hydraulic regulation and control system of the heat supply pipe network according to claim 1, wherein the indoor heat supply device (8) is a hanging piece type heat supply device.
3. The hydraulic regulation and control system of the heat supply pipe network according to claim 1, wherein the indoor heat supply device (8) is a geothermal heat supply device;
the regulation and control system further comprises a water mixing valve (21), the water mixing valve (21) is arranged on the water mixing pipe, the water mixing pipe is communicated with the building front water supply pipe (4) and the building front water return pipe (5), and one end of the water mixing pipe communicated with the building front water supply pipe (4) is located in front of an inlet of the building front water supply variable-frequency circulating pump (12).
4. The heating network hydraulic regulation system of claim 1, 2 or 3, further comprising a water supply network;
the water replenishing pipe network comprises a water replenishing tank (22), a water replenishing pipeline (23) and a water replenishing pump (24);
the water replenishing tank (22) is communicated with a secondary network water return pipe (2) in the station through a water replenishing pipeline (23), and the water replenishing pump (24) is arranged on the secondary network water return pipe (2).
5. The heating network hydraulic regulation system of claim 1, 2 or 3, further comprising a meteorological data acquisition module (25);
the meteorological data acquisition module (25) is used for detecting and outputting meteorological data to the remote control device (20), the meteorological data include outdoor temperature, sunshine radiant quantity, wind direction and wind speed.
6. The method for intelligently controlling the hydraulic regulation and control system of the heat supply pipe network according to claim 1, is characterized by comprising the following steps:
when the water injection pressure of the secondary heat supply pipe network is increased to be higher than a water injection pressure threshold value, starting a secondary network variable frequency circulating pump to enable the secondary heat supply pipe network to perform heat supply circulation; meanwhile, uploading heat supply data of each secondary heat supply pipe network to a remote regulation and control device; the heat supply data of the secondary heat supply pipe network comprises temperature data, pressure data and flow data of each node in the secondary heat supply pipe network; the node comprises a valve, an elbow, a compensator and a reducing pipe;
starting a water supply variable-frequency circulating pump in front of the building to enable a building heat supply pipe network to perform heat supply circulation; meanwhile, water supply flow data, water supply temperature data, return water temperature data and water pressure difference data of the building heat supply pipe network are uploaded to a remote regulation and control device;
when the indoor heat supply pipe network performs heat supply circulation, user indoor temperature data and valve opening data are uploaded to the remote control device;
step two, calculating heat supply indexes of corresponding buildings according to the outdoor temperature, the indoor temperature of the user and the heat supply area of the buildings, and determining the water supply temperature of a secondary heat supply pipe network according to the heat supply indexes;
step three, making the water supply temperature of the building adopting the hanging piece type heating device equal to the water supply temperature of a secondary heat supply pipe network, and setting a first differential pressure value according to the actual resistance of the building at the rated operation flow rate to ensure that the water pressure difference between water supply and return water is kept at the first differential pressure operation of the building rated operation flow rate;
the water supply temperature of a building adopting the geothermal heat supply device is equal to 0.75 time of the water supply temperature of a secondary heat supply pipe network, and a second differential pressure value is set according to the actual resistance of the building at the rated operation flow rate so that the water pressure difference between water supply and return water is kept at the second differential pressure operation of the building rated operation flow rate.
7. The method of claim 6, wherein the water injection pressure threshold is 0.3 MPa.
8. The method of claim 6, wherein the valve opening is 0-100% corresponding to a user room temperature of 8-28 ℃.
9. The method of claim 6, wherein step three further comprises a method of compensating for building heat usage using meteorological data, the method comprising:
when the sunlight radiation amount is increased, the rotating speed of the variable-frequency circulating pump of the secondary network is reduced, so that the circulating water amount of the secondary heat supply network is reduced, the water supply temperature is increased, and when the water supply temperature is higher than a temperature set value, the opening degree of the water supply regulating valve of the primary network is reduced, so that the water supply flow of the primary heat supply network is reduced, the heat supply amount of the primary heat supply network to the secondary heat supply network is further reduced, and the water supply temperature of the secondary heat supply network is kept unchanged at the temperature set value;
when the sunshine radiant quantity reduces or/and wind-force increase, improve the rotational speed of second grade net frequency conversion circulating pump, make second grade heat supply pipe network circulation water yield increase, the water supply temperature reduces, when the water supply temperature is less than the temperature set value, make the aperture increase of first grade net water supply governing valve, make the water supply flow of first grade heat supply pipe network increase, and then increase the heat supply volume that first grade heat supply pipe network carried to second grade heat supply pipe network, make the water supply temperature of second grade heat supply pipe network keep the temperature set value unchangeable.
10. The method for charging for heat supply by using the heat supply pipe network hydraulic regulation and control system of claim 1, is characterized by comprising the following steps:
the method comprises the following steps that firstly, the indoor temperature of each area in a heat supply user room is collected through an indoor temperature sensor, so that the indoor temperature of the heat supply user is obtained, and the indoor temperature of the heat supply user is uploaded to a remote control device;
the indoor temperature of the user is the average temperature of the indoor temperature of each area of the heat supply user;
and step two, calculating the accumulated indoor temperature of the heat supply users, and calling corresponding user heat supply areas and charging formulas pre-stored in the remote control device to obtain heat supply cost.
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Effective date of registration: 20240511 Address after: 157000 South of Xiangyang Road, Linkou Town, Linkou County, Mudanjiang City, Heilongjiang Province Patentee after: Linkou Shengye Thermal Power Co.,Ltd. Country or region after: China Address before: 161400 Nenjiang Shengye Thermal Power Co., Ltd., 88 Jianwei street, Nenjiang County, Heihe City, Heilongjiang Province Patentee before: Li Mingjia Country or region before: China |