CN113028494A - Intelligent heat supply dynamic hydraulic balance control method - Google Patents
Intelligent heat supply dynamic hydraulic balance control method Download PDFInfo
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- CN113028494A CN113028494A CN202110289472.3A CN202110289472A CN113028494A CN 113028494 A CN113028494 A CN 113028494A CN 202110289472 A CN202110289472 A CN 202110289472A CN 113028494 A CN113028494 A CN 113028494A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1015—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves
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Abstract
The invention discloses an intelligent heat supply dynamic hydraulic balance control method, which comprises the following steps: setting a circulating pump in the heating power station into a constant pressure difference operation mode; counting the number of heating users of each unit of the building, and calculating the actual total heating area of each unit; selecting a flow coefficient of a set unit area; inputting the flow coefficient of unit area and the actual total heating area of each unit into an upper computer, and calculating the total flow required by each unit by the upper computer; the invention has the advantages of good heat supply and energy saving effect, solving the phenomenon of uneven heating and cooling, improving heat supply quality, saving operation cost and the like.
Description
Technical Field
The invention relates to the technical field of balance adjustment of a heat supply pipe network, in particular to an intelligent heat supply dynamic hydraulic balance control method.
Background
The central heating mode is adopted in most urban heating in northern China, the distribution area of a heating pipe network is larger and larger along with the improvement of economic level, the number of heat users is also increased sharply, due to the complicated and complicated pipe network layout and the loss of the pipe network, the heating temperature of different areas or floors in the pipe network is greatly different, the room temperature of near-end users is high, the room temperature of far-end users is low, even if a heat supply pump runs in an overload mode, the energy consumption is high, the running cost is high, and the running efficiency of a heating system is reduced.
In order to solve the above problems, in the prior art, a heat supply effect is improved by using a dynamic balance valve to perform flow adjustment, and after retrieval, CN2020211135982 discloses a heat supply internet of things hydraulic balance valve secondary network control system, which comprises a wireless remote temperature collector, a server and a balance valve installed on a water return pipeline of a vertical bar of a heat user unit, wherein each unit respectively selects a plurality of users as a temperature collection point, the temperature collection point uploads the indoor temperature of the users to the server, the server calculates a theoretical average value of room temperature, the balance valve is installed on the water return pipeline of the vertical bar of the heat user unit and remotely feeds back the return water temperature to the server, the server calculates the variable quantity of the valve opening of the unit according to the return water temperature value of each unit and the theoretical average value of the room temperature of the unit users, the server simultaneously issues valve opening variable quantity instructions of all units in a cell, and the balance valve controls the opening of the valve according to the instructions issued.
The structure and the control method have the following defects: firstly, wireless remote temperature collectors are required to be placed in a plurality of user homes of each unit, so that the number of hot users is large, and the heat supply cost is greatly increased; secondly, the backwater temperature value of the unit and the room temperature value of the unit user need to be fed back to the server in real time, the server issues a valve opening variation instruction to the automatic control unit of the balance valve after operation, the automatic control unit of the balance valve controls the mechanical transmission flow control unit to adjust the opening of the valve, the server always participates in the opening adjustment process of the balance valve, the distribution area of a heat supply pipe network is large, the operation processing data of the server is more, the time is long, the data processing transmission is delayed, the operation performance requirement of the server is high, and the operation cost of the heat supply system is also high.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provide the intelligent dynamic hydraulic balance control method for heat supply, which has a good heat supply and energy saving effect, solves the problem of uneven heat supply and cold and heat supply, improves the heat supply quality and saves the operation cost.
The technical scheme adopted by the invention for solving the technical problems is as follows:
an intelligent heat supply dynamic hydraulic balance control method is characterized by comprising the following steps:
setting a circulating pump in the heating power station into a constant pressure difference operation mode;
counting the number of heating users of each unit of the building, and calculating the actual total heating area of each unit;
selecting a flow coefficient of a set unit area;
inputting the flow coefficient of unit area and the actual total heating area of each unit into an upper computer, and calculating the total flow required by each unit by the upper computer;
the intelligent heat supply dynamic hydraulic balance control process comprises the following steps:
step S1: the circulating pump in the heating station is started, the upper computer converts the calculated total flow value of each unit into an electric signal and sends the electric signal to the controller of the intelligent dynamic balance valve of each unit, and the controller of the intelligent dynamic balance valve controls the mechanical transmission flow control unit on the intelligent dynamic balance valve to execute actions to adjust the opening of the valve, so that the flow of each unit is always kept close to a set value;
step S2, in the actual operation process, when the load of the heating area changes or the flow changes, the pressure sensor on the intelligent dynamic balance valve of each unit detects the pressure change and converts the pressure value into an electric signal to be transmitted to the controller, the temperature sensor on the intelligent dynamic balance valve or on the unit water return vertical pipe detects the temperature change and converts the temperature value into an electric signal to be transmitted to the controller, the controller controls the mechanical transmission flow control unit on the intelligent dynamic balance valve to adjust the opening of the valve according to the signals fed back by the pressure sensor and the temperature sensor, and at the moment, the instruction issued by the upper computer does not change;
step S3: when the actual heating parameter index changes greatly, the original instruction parameter needs to be modified by the upper computer, the modified instruction is sent to the controller of the intelligent dynamic balance valve of each unit, and the controller of the intelligent dynamic balance valve controls the mechanical transmission flow control unit to execute the action according to the new instruction so as to adjust the opening of the valve, so that the requirement of the new instruction is met.
The method for determining the constant pressure difference value of the circulating pump in the heating power station comprises the steps of determining the most unfavorable loop, wherein the determination of the constant pressure difference value of the circulating pump needs to ensure that the pressure difference value of the most unfavorable loop meets the requirement of enabling the heat supply of the most unfavorable loop to be normal.
The actual total heating area of each unit is determined by calculating the product of the number of heating paying users of each unit and the heating area of each heating paying user through statistics, the actual total heating area can be accurately counted according to the number of the heating paying users, and the counting method is simple and convenient to count.
The flow coefficient setting range of the unit area is 1.5L/square meter to 6L/square meter, the flow coefficient setting in the range can ensure that the heat supply balance of a secondary network is achieved, and the heat supply energy-saving effect is good.
The actual heating parameter index change of the invention means that the outdoor temperature change is large or the actual heating area change is large due to the new heating opening and stopping.
The invention has the beneficial effects that: the heating flow is determined by collecting heating area data, the data statistics is accurate, the statistical method is simple, and the statistics is convenient; the heating area and the set flow coefficient are sent to an upper computer, after the upper computer sends a command to the on-site intelligent dynamic balance valve, the intelligent dynamic balance valve adjusts the opening of the valve according to the command without participation of the upper computer, only when the actual heating area changes greatly or the outdoor temperature changes greatly, the set parameters of the upper computer need to be modified, the upper computer does not need to participate all the time, the requirement on the operation performance of an upper computer system is low, the heating operation cost is low, the time for debugging a pipe network by personnel is greatly saved, and the room temperature of users can be basically consistent; the circulating pump in the heating station adopts a constant pressure difference mode, so that the normal heat supply of the most unfavorable loop can be ensured no matter how the working condition changes, the control mode is relatively simple, the energy consumption of the system is low, and the reliability is strong; the hydraulic balance of the secondary network is realized by the automatic adjustment of the intelligent dynamic balance valve, the indoor temperature of a heat user is ensured to be relatively balanced, the overall circulation flow of the heat exchange station is reduced, the running frequency of the circulating pump in a constant pressure difference mode is reduced, and the heat supply and energy saving effects are obviously improved.
Drawings
FIG. 1 is a schematic view of a unit water supply riser and a unit water return riser of the present invention.
FIG. 2 is a schematic view of the heating pipe network dynamic balance of the present invention.
Fig. 3 is a schematic diagram of water pressure without the hydraulic balance adjustment system.
FIG. 4 is a schematic of the water pressure through the hydraulic balance adjustment system of the present invention.
Reference numerals: the system comprises a heating station-1, a circulating pump-2, a water supply pipe-3, a unit water supply vertical pipe-4, a water return pipe-5, a unit water return vertical pipe-6, a water supply ball valve-7, a water return ball valve-8, a water supply dirt separator-9, an intelligent dynamic balance valve-10, a pressure sensor-1001, a worst loop-11 and a unit heating user-12.
Detailed Description
The invention is described below with reference to the accompanying drawings and examples.
As shown in fig. 1 and 2, the installation position of the intelligent dynamic balance valve in the secondary pipe network is simply shown, hot water flows out from the heating station 1, enters the unit water supply vertical pipe 4 through the water supply pipe 3, passes through the unit heating user 12, and then flows back to the heating station 1 from the water return pipe 5 through the unit water return vertical pipe 6; a water supply ball valve 7 and a water supply dirt separator 9 are installed on the unit water supply vertical pipe 4, a water return ball valve 8 and an intelligent dynamic balance valve 10 are installed on the unit water return vertical pipe 6, the intelligent dynamic balance valve 10 is installed between the two water return ball valves 8, a pressure sensor 1001 and a temperature sensor are installed on the intelligent dynamic balance valve 10, and a unit heating user in the embodiment refers to an actual heating user in one unit of a building.
The intelligent dynamic balance valve 10 comprises a controller, a valve body part, a pressure sensor and a temperature sensor, wherein the valve body part is provided with a valve body and a mechanical transmission flow control unit, the controller controls the mechanical transmission flow control unit to adjust the opening of the valve, the pressure sensor and the temperature sensor are respectively connected with the controller and feed back pressure electric signals and temperature electric signals to the controller, the structure of the intelligent dynamic balance valve is the prior art, detailed description is omitted, and a PLC (programmable logic controller) can be adopted as the controller of the intelligent dynamic balance valve.
An intelligent heat supply dynamic hydraulic balance control method comprises the following steps:
setting a circulating pump 2 in a thermal power station 1 to be in a constant pressure difference operation mode;
counting the number of heating users 12 in each unit of the building, and calculating the actual total heating area of each unit;
selecting a flow coefficient of a set unit area;
inputting the flow coefficient of unit area and the actual total heating area of each unit into an upper computer, and calculating the total flow required by each unit by the upper computer;
the intelligent heat supply dynamic hydraulic balance control process comprises the following steps:
step S1: the circulating pump 2 in the heating station 1 is started, the upper computer converts the calculated total flow value of each unit into an electric signal and sends the electric signal to the controller of the intelligent dynamic balance valve 10, the controller receives a control instruction and then controls the mechanical transmission flow control unit on the intelligent dynamic balance valve to adjust the opening of the valve, so that the flow of each unit is always kept close to a set value, and the controller controls the mechanical transmission flow control unit to automatically adjust the opening of the valve without feeding back to the upper computer;
step S2, in the actual operation process, when the load of the heating area changes or the flow changes, the pressure sensor 1001 on the intelligent dynamic balance valve 10 detects the pressure change and converts the pressure value into an electric signal to be transmitted to the controller, the temperature sensor on the intelligent dynamic balance valve 10 detects the temperature change and converts the temperature value into an electric signal to be transmitted to the controller, the controller controls the mechanical transmission flow control unit on the intelligent dynamic balance valve to adjust the opening of the valve according to the signals fed back by the pressure sensor 1001 and the temperature sensor, and the instruction issued by the upper computer does not change at the moment;
step S3: when the actual heating parameter index changes greatly, the original instruction parameter needs to be modified on the upper computer, and the modified instruction is issued to the controller of the intelligent dynamic balance valve 10 of each unit, and the controller of the intelligent dynamic balance valve 10 controls the mechanical transmission flow control unit to execute the action according to the new instruction to adjust the opening of the valve so as to meet the requirement of the new instruction.
The method for determining the constant pressure difference value of the circulating pump 2 in the heating power station 1 comprises the steps of determining the most unfavorable loop, wherein the determination of the constant pressure difference value of the circulating pump needs to ensure that the pressure difference value of the most unfavorable loop meets the requirement of enabling the heat supply of the most unfavorable loop to be normal. The requirement that the worst-case loop supplies heat normally is required to ensure that the average indoor temperature of the worst-case loop can reach above 18 ℃. In principle, the unit with the longest pipeline length is determined as the most unfavorable loop, and when the unit with the longest pipeline length cannot be determined, the unit at the tail end of the secondary pipe network is selected as the most unfavorable loop.
The actual total heating area of each unit is determined by calculating the product of the number of heating paying users of each unit and the heating area of each heating paying user through statistics, the actual total heating area can be accurately calculated according to the number of the heating paying users, and the statistical method is simple and convenient to calculate.
The flow coefficient of the unit area is selected according to the type of a building of a community, the heating characteristics of the area where the flow coefficient is located and the operation experience of the whole year, the flow coefficient determining method is convenient to count, the coefficient determination is relatively accurate, and the energy consumption loss of the heating operation is reduced.
The flow coefficient of the unit area is set within the range of 1.5L/square meter to 6L/square meter, and the flow coefficient is set within the range, so that the heat supply balance of a secondary network can be ensured, and the heat supply energy-saving effect is ensured to be good.
The actual heating parameter index change indicates that the outdoor temperature change is large or the actual heating area changes greatly (the user reports stop or opens an account).
In the embodiment, the heat supply range of the heat supply heat station is 9 residential buildings and is 27 units, an intelligent dynamic balance valve is installed on a water return vertical pipe of each residential building unit, the average indoor temperature of the unit with normal heat supply is guaranteed to be above 18 ℃, the cells in the heat supply range of the heat station belong to newly-built cells, the heat preservation effect of the building is good, the flow coefficient of the unit area is set to be 2.8L/square meter, the heat supply area of the most unfavorable loop in the embodiment is calculated according to the unit with the longest pipeline, the total heat supply area of the most unfavorable loop is 740 square meter, the total flow required by the most unfavorable loop is 2.1 m/h through calculation, the pressure difference value of the most unfavorable loop is maintained at 0.03MPa, and the heat supply normal of the most unfavorable loop can be guaranteed, and the constant pressure difference value of the circulating pump in the embodiment is set to be 0.
As shown in fig. 3, fig. 3 is a schematic diagram of water pressure without passing through a hydraulic balance adjustment system, a thick solid line in fig. 3 represents a water supply pressure value, a thin solid line represents a water return pressure value, and a thin dotted line represents an increase in the power of a water pump of a thermal power station, it can be seen from the diagram that no hydraulic balance adjustment measure is taken, the water supply and return pressure difference at the inlet of a user at the end of a pipe network is almost zero, the flow rate is small, the indoor temperature of the user at the end does not reach the standard due to supercooling, the pressure difference value of a user at the front end is large, the flow rate is large, the user at the front end overheats, the water supply and return pressure difference.
As shown in fig. 4, fig. 4 is a schematic water pressure diagram of taking a hydraulic balance adjustment measure, a thick solid line in fig. 4 represents a water supply pressure value, a thin solid line represents a water return pressure value, and three points A, B, C are water return pressure values after taking the hydraulic balance adjustment. It can be seen from the figure that after the hydraulic balance adjustment measures are taken, the pressure difference of supply water and return water of users at the tail end of the pipe network is obviously improved, users at A, B, C all points obtain enough resource pressure heads, under the condition that the power of a circulating pump of a heat exchange station is not improved, the heat supply effect at the tail end is greatly improved, the purpose of hydraulic balance is achieved, the heat supply effect is obviously improved, and the heat supply and energy saving effects are obvious.
The invention has the beneficial effects that: the heating flow is determined by collecting heating area data, the data statistics is accurate, the statistical method is simple, and the statistics is convenient; the heating area and the set flow coefficient are sent to an upper computer, after the upper computer sends a command to the on-site intelligent dynamic balance valve, the intelligent dynamic balance valve adjusts the opening of the valve according to the command without participation of the upper computer, only when the actual heating area changes greatly or the outdoor temperature changes greatly, the set parameters of the upper computer need to be modified, the upper computer does not need to participate all the time, the requirement on the operation performance of an upper computer system is low, the heating operation cost is low, the time for debugging a pipe network by personnel is greatly saved, and the room temperature of users can be basically consistent; the circulating pump in the heating station adopts a constant pressure difference mode, so that the normal heat supply of the most unfavorable loop can be ensured no matter how the working condition changes, the control mode is relatively simple, the energy consumption of the system is low, and the reliability is strong; the hydraulic balance of the secondary network is realized by the automatic adjustment of the intelligent dynamic balance valve, the indoor temperature of a heat user is ensured to be relatively balanced, the overall circulation flow of the heat exchange station is reduced, the running frequency of the circulating pump in a constant pressure difference mode is reduced, and the heat supply and energy saving effects are obviously improved.
Claims (5)
1. An intelligent heat supply dynamic hydraulic balance control method is characterized by comprising the following steps:
setting a circulating pump in the heating power station into a constant pressure difference operation mode;
counting the number of heating users of each unit of the building, and calculating the actual total heating area of each unit;
selecting a flow coefficient of a set unit area;
inputting the flow coefficient of unit area and the actual total heating area of each unit into an upper computer, and calculating the total flow required by each unit by the upper computer;
the intelligent heat supply dynamic hydraulic balance control process comprises the following steps:
step S1: the circulating pump in the heating station is started, the upper computer converts the calculated total flow value of each unit into an electric signal and sends the electric signal to the controller of the intelligent dynamic balance valve of each unit, and the controller of the intelligent dynamic balance valve controls the mechanical transmission flow control unit on the intelligent dynamic balance valve to execute actions to adjust the opening of the valve, so that the flow of each unit is always kept close to a set value;
step S2, in the actual operation process, when the load of the heating area changes or the flow changes, the pressure sensor on the intelligent dynamic balance valve of each unit detects the pressure change and converts the pressure value into an electric signal to be transmitted to the controller, the temperature sensor on the intelligent dynamic balance valve or on the unit water return vertical pipe detects the temperature change and converts the temperature value into an electric signal to be transmitted to the controller, the controller controls the mechanical transmission flow control unit on the intelligent dynamic balance valve to adjust the opening of the valve according to the signals fed back by the pressure sensor and the temperature sensor, and at the moment, the instruction issued by the upper computer does not change;
step S3: when the actual heating parameter index changes greatly, the original instruction parameter needs to be modified by the upper computer, the modified instruction is sent to the controller of the intelligent dynamic balance valve of each unit, and the controller of the intelligent dynamic balance valve controls the mechanical transmission flow control unit to execute the action according to the new instruction so as to adjust the opening of the valve, so that the requirement of the new instruction is met.
2. The intelligent heating dynamic hydraulic balance control method according to claim 1, characterized in that: the method for determining the constant pressure difference value of the circulating pump in the heating power station comprises the steps of determining the most unfavorable loop, wherein the determination of the constant pressure difference value of the circulating pump needs to ensure that the pressure difference value of the most unfavorable loop meets the requirement of enabling the most unfavorable loop to normally supply heat.
3. An intelligent heating dynamic hydraulic balance control method according to claim 1 or 2, characterized in that: and the actual total heating area of each unit is determined by calculating the product of the number of the heating paying users of each unit and the heating area of each heating paying user through statistics.
4. The intelligent heating dynamic hydraulic balance control method according to claim 3, characterized in that: the flow coefficient of the unit area is set within the range of 1.5L/square meter to 6L/square meter.
5. An intelligent heating dynamic hydraulic balance control method according to claim 1, 2 or 4, characterized in that: the actual heating parameter index change indicates that the outdoor temperature change is large or the actual heating area change is large due to the fact that heating is newly started and stopped.
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Cited By (6)
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| CN113623705A (en) * | 2021-08-13 | 2021-11-09 | 程思精 | Pipe network balancing method taking water flow proportion as reference |
| CN113685890A (en) * | 2021-07-06 | 2021-11-23 | 华能国际电力股份有限公司大连电厂 | Heat supply pipe network flow adjusting method |
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| CN113947308A (en) * | 2021-10-19 | 2022-01-18 | 山西英泰立达科技有限公司 | Central heating whole-network energy-saving consumption-reducing management and control system based on user demands |
| CN114543158A (en) * | 2022-02-28 | 2022-05-27 | 瑞纳智能设备股份有限公司 | Unit hydraulic balance adjusting method applied to intelligent balance valve system |
| CN114909707A (en) * | 2022-04-24 | 2022-08-16 | 浙江英集动力科技有限公司 | Heat supply secondary network regulation and control method based on intelligent balancing device and reinforcement learning |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113685890A (en) * | 2021-07-06 | 2021-11-23 | 华能国际电力股份有限公司大连电厂 | Heat supply pipe network flow adjusting method |
| CN113685890B (en) * | 2021-07-06 | 2023-07-25 | 华能国际电力股份有限公司大连电厂 | Heat supply pipe network flow regulating method |
| CN113719887A (en) * | 2021-08-10 | 2021-11-30 | 华能山东发电有限公司烟台发电厂 | Intelligent balance heat supply system |
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| CN114543158A (en) * | 2022-02-28 | 2022-05-27 | 瑞纳智能设备股份有限公司 | Unit hydraulic balance adjusting method applied to intelligent balance valve system |
| CN114909707A (en) * | 2022-04-24 | 2022-08-16 | 浙江英集动力科技有限公司 | Heat supply secondary network regulation and control method based on intelligent balancing device and reinforcement learning |
| CN114909707B (en) * | 2022-04-24 | 2023-10-10 | 浙江英集动力科技有限公司 | Heat supply secondary network regulation and control method based on intelligent balance device and reinforcement learning |
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