CN112880003B - Centralized hot water supply metering method - Google Patents
Centralized hot water supply metering method Download PDFInfo
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- CN112880003B CN112880003B CN202110354538.2A CN202110354538A CN112880003B CN 112880003 B CN112880003 B CN 112880003B CN 202110354538 A CN202110354538 A CN 202110354538A CN 112880003 B CN112880003 B CN 112880003B
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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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Abstract
The invention relates to a centralized hot water supply metering method, which comprises the following steps: s1, after receiving data of a return water meter for 30 minutes, the water inlet meter sorts the minute flow of the return water meter according to the fact that the difference value of the return water meter is from small to large (with negative value); s2, calculating compensation value ration according to the data of the first 5 minutes (theoretically, the water inflow data is larger than the water return data); s3, after the data of the water inlet table for 5 minutes pass through compensation, comparing the data with the data of the water outlet table, and if the data is greater than cal+cal_add, adjusting to the step S4; if the data is smaller than the data updating compensation parameter ratio combination; and S4, respectively compensating the shunt capacity data of the water inlet, comparing the compensated data with the water outlet flow to obtain a value R, and accumulating the subtracted data into the actual use amount of the current user if the R value is larger than the starting ratio.
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 that hot water generated by a central heat source is supplied to a city or a part of areas for production and living through a pipe network. But centralized hot water supply charging is disordered, and the metering of water for users is difficult. Users complain of unreasonable charges and enterprises still feel hard to live.
In the prior art, the water consumption of a user in the system depends on the flow difference between the water running quantity of the water inlet instrument and the water running quantity of the water return instrument. This water usage also affects the amount of hot water used by the user. However, in the actual situation, the water inlet instrument and the water return instrument have flow errors, and the water inlet instrument and the water return instrument have pairing differences. For example using a standard secondary table, the instrument tolerance is +/-2%;
if the instantaneous flow rate of the water inlet meter and the water return meter is 500L/h, the flow rate errors are (1%) and (-1%) respectively; then if we do not make the user start with water, we will always have 10L/h of water in use, which is obviously unsuitable. Similarly, if the flow error of the water inlet meter is (-1%), the flow error of the water return meter is (1%), and the negative flow water consumption of the two meters is (-10L/h), the two meters are not suitable.
Disclosure of Invention
Aiming at the defects existing 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 centralized hot water supply metering method, comprising the steps of:
s1, after receiving data of a return water meter for 30 minutes, the water inlet meter sorts the minute flow of the return water meter according to the fact that the difference value of the return water meter is from small to large (with negative value);
s2, calculating compensation value ration according to the data of the first 5 minutes (theoretically, the water inflow data is larger than the water return data);
s3, after the data of the water inlet table for 5 minutes pass through compensation, comparing the data with the data of the water outlet table, and if the data is greater than cal+cal_add, adjusting to the step S4;
if the data is smaller than the data updating compensation parameter ratio combination;
and S4, respectively compensating the shunt capacity data of the water inlet, comparing the compensated data with the water outlet flow to obtain a value R, and accumulating the subtracted data into the actual use amount of the current user if the R value is larger than the starting ratio.
The present invention may be further configured in a preferred example 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 metering, the water supply end ultrasonic flow metering calculator and the water outlet end ultrasonic flow metering calculator are in butt joint through a TTL signal line, so that the two calculators can perform information interaction in real time.
The present invention may be further configured in a preferred example to: the backwater 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 minute water consumption of the last 30 minutes to the water inlet meter every 11 minutes;
the water inlet meter performs meter calibration according to 30 minutes of historical data and the data of the water return meter, and calculates the water consumption of the user within 11 minutes;
the system informs the water temperature of the water replenishing 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 used by the user every 11 minutes according to the water replenishing temperature, the water outlet temperature of the water inlet meter and the water consumption of the user.
The present invention may be further configured in a preferred example to: key variables needed in the metering process can be modified remotely by a user, including the following key variables:
flow calibration maximum ratio cal, default value is 5.8%;
the flow calibration proportion floats up the amount cal_add once, and the default value is 0.0%;
the minimum Minute flow rate flow_perm is allowed to be calibrated, and the default value is 1.5L/Minute;
metering allows a minimum error start rate of 2.0% by default.
The present invention may be further configured in a preferred example to: in actual use, the flow velocity of the water inlet meter and the flow velocity of the water return meter are smaller than 2 cubic meters per hour, and the hot water reflux meter, the water inlet meter and the water return meter are communicated by using TTL.
The present invention may be further configured in a preferred example to: and after the water inlet meter and the water return meter form an independent system, the independent system is connected with the cloud server through the data acquisition device.
In summary, the present 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 utilizing a communication interface line, so that real-time communication can be performed. And the two on-site meters take the backwater meter as a standard meter to perform on-site real-time effectiveness. The characteristic that the repeatability of the measurement error of the instrument is stable is utilized to make up the characteristic that the individual difference among the instruments causes multiple metering or non-metering. The meter not only can finish the metering of the water consumption of the user, but also can combine the water consumption of the user, the water temperature of the water supply end of the user and the water temperature of the water replenishing of the machine room, and each meter can independently calculate the heat used by the user to improve the metering precision of the hot water, so that the error is reduced to the minimum and is controlled in 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 method for metering concentrated hot water provided by the invention comprises the following steps:
s1, after receiving data of a return water meter for 30 minutes, the water inlet meter sorts the minute flow of the return water meter according to the fact that the difference value of the return water meter is from small to large (with negative value);
s2, calculating compensation value ration according to the data of the first 5 minutes (theoretically, the water inflow data is larger than the water return data);
s3, after the data of the water inlet table for 5 minutes pass through compensation, comparing the data with the data of the water outlet table, and if the data is greater than cal+cal_add, adjusting to the step S4;
if the data is smaller than the data updating compensation parameter ratio combination;
and S4, respectively compensating the shunt capacity data of the water inlet, comparing the compensated data with the water outlet flow to obtain a value R, and accumulating the subtracted data into the actual use amount of the current user if the R value is larger than the starting ratio.
The water inlet meter is used as a main meter to calculate the accumulated water consumption and the accumulated heat consumption of the user, and the data is uploaded to the system through the Mbus. Before metering, the water supply end ultrasonic flow metering calculator and the water outlet end ultrasonic flow metering calculator are in butt joint through a TTL signal line, so that the two calculators can perform information interaction in real time.
In this embodiment, the backwater 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 minute water consumption of the last 30 minutes to the water meter every 11 minutes. The water inlet meter is calibrated according to the historical data of 30 minutes by the user and the data of the water return meter, and the water consumption used by the user in 11 minutes is calculated according to the data. The system informs the water temperature of the water replenishing machine room of the water inlet meter in a broadcast pushing mode every 10 minutes, and the water inlet meter calculates the heat used by the user every 11 minutes according to the water replenishing 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 modified remotely by a user, including the following key variables: the flow calibration maximum ratio cal, default value is 5.8%, the flow calibration ratio float up once cal_add, default value is 0.0%, the minimum Minute flow flow_perm is allowed to be calibrated, default value is 1.5L/Minute, the metering allows the minimum error start rate, default value is 2.0%.
Wherein, in actual use, the flow rate of the water inlet meter and the water return meter is less than 2 cubic meters per hour, and the hot water return meter, the water inlet meter and the water return meter are communicated by using TTL. After the water inlet meter and the water return meter form an independent system, the system is connected with the cloud server through the data acquisition device.
The implementation principle of the embodiment is as follows: the on-site water inlet meter and the water return meter are connected by utilizing a communication interface line, so that real-time communication can be performed. And the two on-site meters take the backwater meter as a standard meter to perform on-site real-time effectiveness. The characteristic that the repeatability of the measurement error of the instrument is stable is utilized to make up for the characteristic that the individual difference among the instruments causes no metering or no metering. The meter not only can finish the metering of the water consumption of the user, but also can combine the water consumption of the user, the water temperature of the water supply end of the user and the water temperature of the water replenishing of the machine room, and each meter can independently calculate the heat used by the user to improve the metering precision of the hot water, so that the error is reduced to the minimum and is controlled in the acceptable range of the user.
The embodiments of the present invention are all preferred embodiments of the present invention, and are not intended to limit the scope of the present invention in this way, therefore: all equivalent changes in structure, shape and principle of the invention should be covered in the scope of protection of the invention.
Claims (5)
1. A centralized hot water supply metering method is characterized in that: the method comprises the following steps:
s1, after receiving data of a return water meter for 30 minutes, the water inlet meter sorts the minute flow of the return water meter according to the difference value of the return water meter from small to large;
s2, calculating compensation value allocation by data of 5 minutes before water entering the water meter;
s3, after the data of the water inlet table for 5 minutes pass through compensation, comparing the data with the data of the water outlet table, and if the data is greater than cal+cal_add, adjusting to the step S4;
if the data is smaller than the data updating compensation parameter ratio combination;
key variables needed in the metering process can be modified remotely by a user, including the following key variables:
flow calibration maximum ratio cal, default value is 5.8%;
the flow calibration proportion floats up the amount cal_add once, and the default value is 0.0%;
the minimum Minute flow rate flow_perm is allowed to be calibrated, and the default value is 1.5L/Minute;
metering the allowable minimum error start rate, default value of 2.0%;
and S4, respectively compensating the shunt capacity data of the water inlet, comparing the compensated data with the water outlet flow to obtain a value R, and accumulating the data subtracted by the R value and the starting ratio into the actual use amount of the current user if the R value is larger than the starting ratio.
2. The method for metering concentrated hot water according to 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 metering, the water supply end ultrasonic flow metering calculator and the water outlet end ultrasonic flow metering calculator are in butt joint through a TTL signal line, so that the two calculators can perform information interaction in real time.
3. The method for metering concentrated hot water according to claim 1, wherein: the backwater 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 minute water consumption of the last 30 minutes to the water inlet meter every 11 minutes;
the water inlet meter performs meter calibration according to 30 minutes of historical data and the data of the water return meter, and calculates the water consumption of the user within 11 minutes;
the system informs the water temperature of the water replenishing 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 used by the user every 11 minutes according to the water replenishing temperature, the water outlet temperature of the water inlet meter and the water consumption of the user.
4. The method for metering concentrated hot water according to claim 1, wherein: in actual use, the flow velocity of the water inlet meter and the flow velocity of the water return meter are smaller than 2 cubic meters per hour, and the hot water reflux meter, the water inlet meter and the water return meter are communicated by using TTL.
5. The method for metering concentrated hot water according to claim 4, wherein: and after the water inlet meter and the water return meter form an independent system, the independent system is connected with the cloud server through the data acquisition device.
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| 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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| JPS58136929A (en) * | 1982-02-08 | 1983-08-15 | Matsushita Electric Ind Co Ltd | Solar heat utilization equipment |
| CN101839521B (en) * | 2010-05-31 | 2012-06-13 | 河北工业大学 | Real-time heat sharing device |
| KR101234528B1 (en) * | 2010-11-23 | 2013-02-19 | 주식회사 경동원 | Method for controlling heating of boiler and apparatus thereof |
| CN102706485A (en) * | 2012-07-05 | 2012-10-03 | 威海震宇智能科技有限公司 | Ultrasonic heat meter with double flowmeters |
| CN104219302B (en) * | 2014-09-01 | 2017-07-21 | 黄汴荣 | Heating pipe network heat statistics decomposes acquiring and transmission system and method |
| CN105841762B (en) * | 2016-03-17 | 2019-04-26 | 广州周立功单片机科技有限公司 | The flow metering method and system of ultrasonic water meter |
| 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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