CN112880003A - Central hot water supply metering method - Google Patents
Central hot water supply metering method Download PDFInfo
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- CN112880003A CN112880003A CN202110354538.2A CN202110354538A CN112880003A CN 112880003 A CN112880003 A CN 112880003A CN 202110354538 A CN202110354538 A CN 202110354538A CN 112880003 A CN112880003 A CN 112880003A
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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
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
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- General Engineering & Computer Science (AREA)
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Abstract
The invention relates to a centralized hot water supply metering method, which comprises the following steps: s1, after the water inlet meter receives the data of the water meter for 30 minutes, the minute flow of the water meter is sequenced according to the difference value of the water meter from small to large (negative value); s2, calculating a compensation value ration according to the data of the previous 5 minutes (theoretically, the water inlet data is larger than the water return data); s3, comparing the data of the water inlet table 5 minutes before passing the compensation with the data of the water outlet table, and if the data is more than cal + cal _ add, turning to the step S4; if the data is less than the data update compensation parameter ratio composite; and S4, respectively compensating the flow rate data of the water inlet, comparing the compensated data with the flow rate of the water outlet to obtain a value R, and if the value R is greater than the starting ratio, accumulating the data obtained by subtracting the two numbers into the actual usage amount of the current user.
Description
Technical Field
The invention relates to the technical field of hot water supply systems, in particular to a centralized hot water supply metering method.
Background
The central hot water supply system is a hot water supply mode for supplying hot water generated by a central heat source to a city or a part of regions for production and living. However, the charging method for centralized hot water supply is disordered, and the water consumption of the user is difficult to measure. The user complains that the charge is unreasonable, and the enterprise still feels hard to live.
In the prior art, the water consumption of a user in a system depends on the flow difference between the water flowing amount of a water inlet instrument and the water flowing amount of a water return instrument. This water consumption also affects the heat of the hot water used by the user. However, in the actual situation, the water inlet instrument and the water return instrument mostly have flow errors, and the water inlet instrument and the water return instrument are also different in pairing. For example, using a standard secondary table, the instrument tolerance is +/-2%;
if the water inlet meter and the water return meter have the instantaneous flow of 500L/h, the flow errors are (1%) and (-1%), respectively; then we will always have 10L/h water consumption by the user if we do not do the user water start-up cut-off, which is obviously not suitable. Similarly, if the flow error of the water inlet meter is (-1%), the flow error of the water return meter is (1%), and the water consumption of the two meters with negative flow of (-10L/h) is not proper.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a centralized hot water supply metering method which can improve the metering precision of hot water quantity, minimize the error and control the error within the acceptable range of users.
The above object of the present invention is achieved by the following technical solutions:
a central hot water supply metering method comprises the following steps:
s1, after the water inlet meter receives the data of the water meter for 30 minutes, the minute flow of the water meter is sequenced according to the difference value of the water meter from small to large (negative value);
s2, calculating a compensation value ration according to the data of the previous 5 minutes (theoretically, the water inlet data is larger than the water return data);
s3, comparing the data of the water inlet table 5 minutes before passing the compensation with the data of the water outlet table, and if the data is more than cal + cal _ add, turning to the step S4;
if the data is less than the data update compensation parameter ratio composite;
and S4, respectively compensating the flow rate data of the water inlet, comparing the compensated data with the flow rate of the water outlet to obtain a value R, and if the value R is greater than the starting ratio, accumulating the data obtained by subtracting the two numbers into the actual usage amount of the current user.
The present invention in a preferred example may be further configured to: the water inlet meter is used as a main meter to calculate the accumulated water consumption and the accumulated heat consumption of a user, and data are uploaded to the system through an Mbus;
before the measurement is started, the water supply end ultrasonic flow measurement calculator and the water outlet end ultrasonic flow measurement calculator are in butt joint through TTL signal lines, so that the two calculators can carry out information interaction in real time.
The present invention in a preferred example may be further configured to: the water return meter is used as a reference meter, and the flow of the water inlet meter is calibrated in real time;
the backwater meter sends the water consumption in the last 30 minutes to the water inlet meter every 11 minutes;
the water inlet meter is calibrated according to 30-minute historical data of the water inlet meter and the data of the water return meter, and the water consumption used by a user within 11 minutes is calculated according to the data;
the system informs the water temperature of water supplement of the machine room of the water inlet meter in a broadcast push mode every 10 minutes, and the water inlet meter calculates the heat of use of the user every 11 minutes according to the water temperature of the water supplement, the water outlet temperature of the water inlet meter and the water consumption of the user.
The present invention in a preferred example may be further configured to: key variables needed in the metering process can be remotely modified by a user, and the key variables comprise the following key variables:
the flow calibrates the maximum proportional cal, with a default value of 5.8%;
the flow calibration proportion primary floating amount cal _ add with the default value of 0.0%;
the lowest Minute flow _ perm is allowed to be calibrated, and the default value is 1.5L/Minute;
metering allows the lowest error start rate, with a default value of 2.0%.
The present invention in a preferred example may be further configured to: in actual use, the flow velocity of the water inlet meter and the flow velocity of the water return meter are less than 2 cubic meters per hour, and the hot water flow return meter, the water inlet meter and the water return meter are communicated by TTL.
The present invention in a preferred example may be further configured to: and the water inlet meter and the water return meter form an independent system and are connected with the cloud server through a data acquisition unit.
In summary, the invention includes at least one of the following beneficial technical effects:
the on-site water inlet meter and the water return meter are connected by a communication interface line, and real-time communication can be carried out. The two instruments on site use a backwater meter as a standard meter to carry out on-site real-time accuracy. The characteristic that the repeatability of the measurement error of the instrument is relatively stable is utilized, and the characteristic that the individual difference between the instruments causes more metering or no metering is made up. The water consumption of the user can be measured by the instruments, the water consumption of the user, the water temperature of a water supply end of the user and the water temperature of a water replenishing device of a machine room can be combined, each instrument can independently calculate the heat consumption of the user and can improve the measuring precision of the hot water, the error is reduced to the minimum, and the control is within the acceptable range of the user.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, the centralized hot water supply metering method disclosed by the invention comprises the following steps:
s1, after the water inlet meter receives the data of the water meter for 30 minutes, the minute flow of the water meter is sequenced according to the difference value of the water meter from small to large (negative value);
s2, calculating a compensation value ration according to the data of the previous 5 minutes (theoretically, the water inlet data is larger than the water return data);
s3, comparing the data of the water inlet table 5 minutes before passing the compensation with the data of the water outlet table, and if the data is more than cal + cal _ add, turning to the step S4;
if the data is less than the data update compensation parameter ratio composite;
and S4, respectively compensating the flow rate data of the water inlet, comparing the compensated data with the flow rate of the water outlet to obtain a value R, and if the value R is greater than the starting ratio, accumulating the data obtained by subtracting the two numbers into the actual usage amount of the current user.
The water inlet meter is used as a main meter to calculate the accumulated water consumption and the accumulated heat consumption of a user, and data are uploaded to the system through an Mbus. Before the measurement is started, the water supply end ultrasonic flow measurement calculator and the water outlet end ultrasonic flow measurement calculator are in butt joint through TTL signal lines, so that the two calculators can carry out information interaction in real time.
In this embodiment, the flow of the water meter is calibrated in real time by using the backwater meter as a reference meter. And sending the water consumption of the last 30 minutes to the water meter every 11 minutes. The water meter is calibrated by combining the 30-minute historical data of the water meter with the data of the water meter, and the water consumption of the user in 11 minutes is calculated. The system informs the water supplementing temperature of the machine room of the water inlet meter in a broadcast pushing mode every 10 minutes, and the water inlet meter calculates the heat consumption of the user every 11 minutes according to the water supplementing temperature, the water outlet temperature of the water inlet meter and the water consumption of the user.
Key variables needed in the metering process can be remotely modified by a user, and the key variables comprise the following key variables: the flow calibrates the maximum proportional cal, with a default of 5.8%, the flow calibrates the proportional first float cal _ add, with a default of 0.0%, the allowed calibrated minimum Minute flow _ perm, with a default of 1.5L/min, the gauge allowed minimum error start ratio, with a default of 2.0%.
In actual use, the flow velocity of the water inlet meter and the water return meter is less than 2 cubic meters per hour, and the hot water flow return meter, the water inlet meter and the water return meter communicate by using TTL (transistor-transistor logic). The water inlet meter and the water return meter form an independent system and are connected with the cloud server through the data acquisition unit.
The implementation principle of the embodiment is as follows: the on-site water inlet meter and the water return meter are connected by a communication interface line, and real-time communication can be carried out. The two instruments on site use a backwater meter as a standard meter to carry out on-site real-time accuracy. The characteristic that the repeatability of the measurement error of the instrument is relatively stable is utilized, and the characteristic that no measurement or no measurement is caused by individual difference among the instruments is made up. The water consumption of the user can be measured by the instruments, the water consumption of the user, the water temperature of a water supply end of the user and the water temperature of a water replenishing device of a machine room can be combined, each instrument can independently calculate the heat consumption of the user and can improve the measuring precision of the hot water, the error is reduced to the minimum, and the control is within the acceptable range of the user.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (6)
1. A centralized hot water supply metering method is characterized in that: the method comprises the following steps:
s1, after the water inlet meter receives the data of the water meter for 30 minutes, the minute flow of the water meter is sequenced according to the difference value of the water meter from small to large (negative value);
s2, calculating a compensation value ration according to the data of the previous 5 minutes (theoretically, the water inlet data is larger than the water return data);
s3, comparing the data of the water inlet table 5 minutes before passing the compensation with the data of the water outlet table, and if the data is more than cal + cal _ add, turning to the step S4;
if the data is less than the data update compensation parameter ratio composite;
and S4, respectively compensating the flow rate data of the water inlet, comparing the compensated data with the flow rate of the water outlet to obtain a value R, and if the value R is greater than the starting ratio, accumulating the data obtained by subtracting the two numbers into the actual usage amount of the current user.
2. A method of centralized hot water metering as claimed in claim 1, wherein: the water inlet meter is used as a main meter to calculate the accumulated water consumption and the accumulated heat consumption of a user, and data are uploaded to the system through an Mbus;
before the measurement is started, the water supply end ultrasonic flow measurement calculator and the water outlet end ultrasonic flow measurement calculator are in butt joint through TTL signal lines, so that the two calculators can carry out information interaction in real time.
3. A method of centralized hot water metering as claimed in claim 1, wherein: the water return meter is used as a reference meter, and the flow of the water inlet meter is calibrated in real time;
the backwater meter sends the water consumption in the last 30 minutes to the water inlet meter every 11 minutes;
the water inlet meter is calibrated according to 30-minute historical data of the water inlet meter and the data of the water return meter, and the water consumption used by a user within 11 minutes is calculated according to the data;
the system informs the water temperature of water supplement of the machine room of the water inlet meter in a broadcast push mode every 10 minutes, and the water inlet meter calculates the heat of use of the user every 11 minutes according to the water temperature of the water supplement, the water outlet temperature of the water inlet meter and the water consumption of the user.
4. A method of centralized hot water metering as claimed in claim 1, wherein: key variables needed in the metering process can be remotely modified by a user, and the key variables comprise the following key variables:
the flow calibrates the maximum proportional cal, with a default value of 5.8%;
the flow calibration proportion primary floating amount cal _ add with the default value of 0.0%;
the lowest Minute flow _ perm is allowed to be calibrated, and the default value is 1.5L/Minute;
metering allows the lowest error start rate, with a default value of 2.0%.
5. A method of centralized hot water metering as claimed in claim 1, wherein: in actual use, the flow velocity of the water inlet meter and the flow velocity of the water return meter are less than 2 cubic meters per hour, and the hot water flow return meter, the water inlet meter and the water return meter are communicated by TTL.
6. A method of centralised hot water metering according to claim 5, characterised in that: and the water inlet meter and the water return meter form an independent system and are connected with the cloud server through a data acquisition unit.
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| CN202110354538.2A CN112880003B (en) | 2021-04-01 | 2021-04-01 | Centralized hot water supply metering method |
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| CN202110354538.2A CN112880003B (en) | 2021-04-01 | 2021-04-01 | Centralized hot water supply metering method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113654627A (en) * | 2021-09-16 | 2021-11-16 | 江花集团有限公司 | Method and device for water meter metering compensation and cloud server |
| CN113790771A (en) * | 2021-09-15 | 2021-12-14 | 苏州东剑智能科技有限公司 | Method for metering water consumption of user of circulating water supply system |
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| JPS58136929A (en) * | 1982-02-08 | 1983-08-15 | Matsushita Electric Ind Co Ltd | Solar heat utilization equipment |
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| WO2012070813A2 (en) * | 2010-11-23 | 2012-05-31 | 주식회사 경동네트웍 | Apparatus and method for controlling the heating of a boiler |
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| CN105841762A (en) * | 2016-03-17 | 2016-08-10 | 广州周立功单片机科技有限公司 | Supersonic wave water meter flow metering method and system |
| CN109556176A (en) * | 2018-10-15 | 2019-04-02 | 华北电力大学 | A kind of heating terminal intelligent on-off valve regulation method based on dual time-step |
| CN211346929U (en) * | 2019-12-11 | 2020-08-25 | 威海道亨自动化技术有限公司 | Automatic flow compensation water meter |
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2021
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58136929A (en) * | 1982-02-08 | 1983-08-15 | Matsushita Electric Ind Co Ltd | Solar heat utilization equipment |
| CN101839521A (en) * | 2010-05-31 | 2010-09-22 | 河北工业大学 | Real-time heat sharing device |
| WO2012070813A2 (en) * | 2010-11-23 | 2012-05-31 | 주식회사 경동네트웍 | Apparatus and method for controlling the heating of a boiler |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113790771A (en) * | 2021-09-15 | 2021-12-14 | 苏州东剑智能科技有限公司 | Method for metering water consumption of user of circulating water supply system |
| CN113654627A (en) * | 2021-09-16 | 2021-11-16 | 江花集团有限公司 | Method and device for water meter metering compensation and cloud server |
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| CN112880003B (en) | 2023-05-23 |
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