CN1651881A - Equal time interval correcting regulating method for flow accuracy of calorimeter - Google Patents
Equal time interval correcting regulating method for flow accuracy of calorimeter Download PDFInfo
- Publication number
- CN1651881A CN1651881A CN 200510041725 CN200510041725A CN1651881A CN 1651881 A CN1651881 A CN 1651881A CN 200510041725 CN200510041725 CN 200510041725 CN 200510041725 A CN200510041725 A CN 200510041725A CN 1651881 A CN1651881 A CN 1651881A
- Authority
- CN
- China
- Prior art keywords
- flow
- flow rate
- working conditions
- rate working
- calorimeter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Measuring Volume Flow (AREA)
Abstract
The present invention relates to an equitime quantum correction and regulation method of calorimeter flow accuracy. It is characterized by that said invention uses the flow coefficient of the mechanical calorimeter as basis of flow measurement, and uses a standard flowmeter as standard for correcting flow measurement error; then the flow full-scale range of calorimeter can be divided into several different flow conditions, and the measurement collecting time t of every flow condition is equal time quantum, then the meter to be corrected and standard meter can be used for synchronously measuring every flow condition and two calculation formulas can be used to define the accumulated hot water volume for heating energy user. Said invention can make flow measurement error accuracy be controlled in 0.5%.
Description
(1) technical field under:
The invention belongs to instrument and meter field of measuring technique, relate to a kind of equal time interval correcting regulating method of flow accuracy of calorimeter.
(2) background technology
The measuring instrument that the charging of central heating household metering adopts is calorimeter.Calorimeter is comprised of a flowmeter and two temperature sensors at present, flowmeter is used for measuring and enters the heat flow of hot water of user, two temperature sensors are used for respectively measuring user heat supply water temperature and the return water temperature of hot water, are determined user's heating load by following (1) formula
Q＝∫G(t)·C·(T
I-T
E)·dt??????????????(1)
In formula, Q is the accumulative total heating load of user's heating, and G is the heating hot water flow that enters user, the heating duration that t is user, and C is hot water specific heat, T
iwith T
ebe respectively user's heating and supplying water temperature and return water temperature.
Be built in flowmeter in calorimeter by wing impeller measuring flow, it utilizes ducted flow dynamic, impacts wing vane rotary in flowmeter, and method by experiment knows that the coefficient of flow of wing impeller (turns/m
3), then by following formula, determine volumetric flow rate V to be measured by the revolution N of coefficient of flow and wing impeller.
V＝N/????????????????(2)
As can be seen here, the coefficient of flow of wing impeller be wing impeller rotation with by the ratio of volumetric flow rate, it reflected wing impeller rotation and pass through the relation between volumetric flow rate.Obviously, wing impeller rotation is larger just shows that passed through volumetric flow rate is larger.If mechanical heat meter gathers the time interval of flow information and is τ at every turn, the period that is each flow rate working conditions is τ, like this, mechanical heat meter adds up the collection capacity of each flow rate working conditions period, is determined user's accumulative total heating load by following (3) formula
In formula, the coefficient of flow that is wing impeller, N
kfor the wing impeller rotation under k flow rate working conditions, ρ
k-1and ρ
kbe respectively the user's heating and supplying water density under k-1 and k flow rate working conditions, C
k-1and C
kbe respectively user under k-1 and the k flow rate working conditions backwater mean specific heat that heats, T
k-1 iand T
k ibe respectively the user's heating and supplying water temperature under k-1 and k flow rate working conditions, T
k-1 eand T
k ebe respectively the user's heating water return temperature under k-1 and k flow rate working conditions.
Mechanical heat meter is exactly to determine according to above-mentioned principle and formula (3) the accumulative total heating load that user heats at present.The flow measurement precision that mechanical heat meter manufacturer provides is: in low discharge region, the flow measurement error from minimum flow to the flow of demarcating is 5%, in middle and high flow region, from boundary flow to the flow measurement error of crossing current-carrying capacity, is 2%.As can be seen here, at present mechanical heat meter measuring accuracy is not high, is because flow measurement precision is not high, can't reach desired 0.5% with interior flow measurement error precision, this is also the existing technical deficiency of current mechanical heat meter.Because mechanical heat meter measuring accuracy is controlled by flow measurement precision, so improve the key of mechanical heat meter measuring accuracy, be just how to improve flow measurement precision.
Application number is that 02123596 patent of invention discloses a kind of " the measurement modification method of heat quantity flow and temperature ", in the method, for mechanical heat meter flow measurement precision is improved, proposed the flowmeter in each mechanical heat meter to demarcate, implement dynamically whole correction, treating that the flowmeter of school calorimeter and normal stream scale compare at different characteristic flow point, calibrated coefficient of flow
#as the foundation of calculated flow rate, by the following formula of similar formula (2), calculate by the volumetric flow rate V of flowmeter
V＝N/
#????????????(4)
The method has advantages of can reduce calorimeter components and parts cost, improve mechanical heat meter flow measurement precision.But, from this, invent disclosed technical scheme, cannot learn coefficient of flow
#be how to obtain, and how use.
(3) summary of the invention
For overcoming the not high deficiency of the existing flow measurement precision of existing machinery formula calorimeter, the present invention proposes a kind of equal time interval correcting regulating method of flow accuracy of calorimeter.
The technical solution adopted in the present invention is: the basis that the coefficient of flow of mechanical heat meter of take is flow measurement, the standard with normal stream scale as correction mechanical formula heat quantity flow measuring error.By by the synchronous flow experiments of measuring of meter to be corrected and standard scale contrast, obtain the error function of mechanical heat meter flow measurement.Concrete grammar is: the flow gamut of calorimeter is divided into several different school flows for the treatment of, be several flow rate working conditions, and to make each flow rate working conditions measure acquisition time τ be the equal period, meter to be corrected and standard scale carry out synchro measure to each flow rate working conditions, and pass through
determine the flow measurement error of mechanical heat meter.
In formula, y
kfor mechanical heat meter measuring error under k flow rate working conditions in flow gamut, G
k 0for the volumetric flow rate of normal stream scale under k flow rate working conditions, τ is that the measurement that each flow rate working conditions is equal gathers period, N
kfor the revolution of mechanical heat meter τ wing impeller in the period under k flow rate working conditions, the coefficient of flow that is mechanical heat meter (turns/m
3).
Corresponding different volumetric flow rates
just there is different y
kbe worth corresponding, i.e. y
kbe
function.As can be seen here, the exact value of mechanical heat meter volume flow measurement should be
After when use waits, phase method is adjusted the flow accuracy school of calorimeter, by
determine the accumulative total hot water volume that user heats.In formula, the accumulative total hot water volume that V heats in the time at m τ for user, N
jfor the revolution of mechanical heat meter τ wing impeller in the period under j flow rate working conditions, y
jfor the measuring error of mechanical heat meter under j flow rate working conditions, and at drawn y
kin discrete function, interpolation is chosen.
The equal time interval correcting regulating method of the flow accuracy of calorimeter that the present invention proposes, has overcome the not high deficiency of the existing flow measurement precision of existing machinery formula calorimeter.Adopt the equal time interval correcting regulating method of mechanical heat meter flow accuracy of the present invention, do not need to change the structure of mechanical heat meter, only by correction and the accuracy compensation of institute's measurement of discharge are adjusted, just can make the flow measurement precision of existing machinery formula calorimeter increase substantially, can make the calorimetry precision of existing machinery formula calorimeter increase substantially, can make flow measurement error precision be controlled within 0.5% simultaneously.
(4) embodiment:
Embodiment mono-
The present embodiment is to utilize existing mechanical heat meter check and corrective system, normal stream scale with treat school calorimeter check with corrective system in be the series relationship of single-pipeline, the equal time interval correcting regulating method of application of heat flow-meter precision is that 15mm, flow gamut are 2m to nominal bore
3the flow measurement precision of the calorimeter of/h is carried out school tune.
Knownly treat that the coefficient of flow of the wing impeller of school calorimeter is 28000 turn/m
3, the flow gamut for the treatment of school calorimeter being divided into 30 and treating school flow rate working conditions, these flow rate working conditions are G
k 0, k=1,2,3 ..., 30, G wherein
1 0for the flow rate working conditions of minimum value, its value is 0.005m
3/ h, G
30 0for the flow rate working conditions of greatest measure, its value is 2m
3/ h.Stipulate that each flow rate working conditions has equal period τ, τ is 5s.Water tank and pipeline are full of to hot water, by computer control, electric control valve cut out, then just can carry out the correction experiment to mechanical heat meter flow measurement error.In proofreading and correct experimentation, computing machine is implemented the control to electric control valve always, by the aperture of by-pass valve control, and to realize the control to discharge, and to normal stream scale and the flow data collector for the treatment of school calorimeter.When computing machine confirms that computer control electric control valve makes its valve opening be fixed up, and then moves the τ time under this operating mode, determines the volume flow measurement error under this flow rate working conditions by following formula when the flow rate working conditions of school calorimeter arrives until school flow rate working conditions
In formula, y
kfor mechanical heat meter measuring error under k flow rate working conditions in flow gamut, G
k 0for the volumetric flow rate of normal stream scale under k flow rate working conditions, τ is that the measurement that each flow rate working conditions is equal gathers period, N
kfor the revolution of mechanical heat meter τ wing impeller in the period under k flow rate working conditions, the coefficient of flow that is mechanical heat meter (turns/m
3).
After completing k the correction experiment under flow rate working conditions, computing machine has just recorded the volume flow measurement error y under this flow rate working conditions
k, then computing machine is controlled the aperture variation that electric control valve makes its valve again, enters into next flow rate working conditions.When having completed the correction experiment of whole flow rate working conditions, whole correction experiment also just comes to an end.Now, computing machine has been recorded the volume flow measurement error of each flow rate working conditions.According to these flow errors, carry out calibration and compensation, treat that the flow measurement precision of school calorimeter just can increase substantially.After phase method is adjusted the flow accuracy school of calorimeter when use waits, by following formula, determine the accumulative total hot water volume that user heats
In formula, the accumulative total hot water volume that V heats in the time at m τ for user, N
jfor the revolution of mechanical heat meter τ wing impeller in the period under j flow rate working conditions, y
jfor the measuring error of mechanical heat meter under j flow rate working conditions, and at drawn y
kin discrete function, interpolation is chosen.
Embodiment bis-
The present embodiment is to utilize existing mechanical heat meter check and corrective system, normal stream scale with treat school calorimeter check with corrective system in be the series relationship of single-pipeline, the equal time interval correcting regulating method of application of heat flow-meter precision is that 20mm, flow gamut are 3m to nominal bore
3the flow measurement precision of the calorimeter of/h is carried out school tune.
Knownly treat that the coefficient of flow of the wing impeller of school calorimeter is 32000 turn/m
3, the flow gamut for the treatment of school calorimeter being divided into 50 and treating school flow rate working conditions, these flow rate working conditions are G
k 0, k=1,2,3 ..., 50, G wherein
1 0for the flow rate working conditions of minimum value, its value is 0.005m
3/ h, G
50 0for the flow rate working conditions of greatest measure, its value is 3m
3/ h.Stipulate that each flow rate working conditions has equal period τ, τ is 10s.Water tank and pipeline are full of to hot water, by computer control, electric control valve cut out, then just can carry out the correction experiment to mechanical heat meter flow measurement error.In proofreading and correct experimentation, computing machine is implemented the control to electric control valve always, by the aperture of by-pass valve control, and to realize the control to discharge, and to normal stream scale and the flow data collector for the treatment of school calorimeter.When computing machine confirms that computer control electric control valve makes its valve opening be fixed up, and then moves the τ time under this operating mode, determines the volume flow measurement error under this flow rate working conditions by following formula when the flow rate working conditions of school calorimeter arrives until school flow rate working conditions
In formula, y
kfor mechanical heat meter measuring error under k flow rate working conditions in flow gamut, G
k 0for the volumetric flow rate of normal stream scale under k flow rate working conditions, τ is that the measurement that each flow rate working conditions is equal gathers period, N
kfor the revolution of mechanical heat meter τ wing impeller in the period under k flow rate working conditions, the coefficient of flow that is mechanical heat meter (turns/m
3).
After completing k the correction experiment under flow rate working conditions, computing machine has just recorded the volume flow measurement error y under this flow rate working conditions
k, then computing machine is controlled the aperture variation that electric control valve makes its valve again, enters into next flow rate working conditions.When having completed the correction experiment of whole flow rate working conditions, whole correction experiment also just comes to an end.Now, computing machine has been recorded the volume flow measurement error of each flow rate working conditions.According to these flow errors, carry out calibration and compensation, treat that the flow measurement precision of school calorimeter just can increase substantially.After phase method is adjusted the flow accuracy school of calorimeter when use waits, by following formula, determine the accumulative total hot water volume that user heats
In formula, the accumulative total hot water volume that V heats in the time at m τ for user, N
jfor the revolution of mechanical heat meter τ wing impeller in the period under j flow rate working conditions, y
jfor the measuring error of mechanical heat meter under j flow rate working conditions, and at drawn y
kin discrete function, interpolation is chosen.
Embodiment tri-
The present embodiment is to utilize existing mechanical heat meter check and corrective system, normal stream scale with treat school calorimeter check with corrective system in be the series relationship of single-pipeline, the equal time interval correcting regulating method of application of heat flow-meter precision is that 25mm, flow gamut are 4m to nominal bore
3the flow measurement precision of the calorimeter of/h is carried out school tune.
Knownly treat that the coefficient of flow of the wing impeller of school calorimeter is 35000 turn/m
3, the flow gamut for the treatment of school calorimeter being divided into 80 and treating school flow rate working conditions, these flow rate working conditions are G
k 0, k=1,2,3 ..., 80, G wherein
1 0for the flow rate working conditions of minimum value, its value is 0.01m
3/ h, G
80 0for the flow rate working conditions of greatest measure, its value is 4m
3/ h.Stipulate that each flow rate working conditions has equal period τ, τ is 15s.Water tank and pipeline are full of to hot water, by computer control, electric control valve cut out, then just can carry out the correction experiment to mechanical heat meter flow measurement error.In proofreading and correct experimentation, computing machine is implemented the control to electric control valve always, by the aperture of by-pass valve control, and to realize the control to discharge, and to normal stream scale and the flow data collector for the treatment of school calorimeter.When computing machine confirms that computer control electric control valve makes its valve opening be fixed up, and then moves the τ time under this operating mode, determines the volume flow measurement error under this flow rate working conditions by following formula when the flow rate working conditions of school calorimeter arrives until school flow rate working conditions
In formula, y
kfor mechanical heat meter measuring error under k flow rate working conditions in flow gamut, G
k 0for the volumetric flow rate of normal stream scale under k flow rate working conditions, τ is that the measurement that each flow rate working conditions is equal gathers period, N
kfor the revolution of mechanical heat meter τ wing impeller in the period under k flow rate working conditions, the coefficient of flow that is mechanical heat meter (turns/m
3).
After completing k the correction experiment under flow rate working conditions, computing machine has just recorded the volume flow measurement error y under this flow rate working conditions
k, then computing machine is controlled the aperture variation that electric control valve makes its valve again, enters into next flow rate working conditions.When having completed the correction experiment of whole flow rate working conditions, whole correction experiment also just comes to an end.Now, computing machine has been recorded the volume flow measurement error of each flow rate working conditions.According to these flow errors, carry out calibration and compensation, treat that the flow measurement precision of school calorimeter just can increase substantially.After phase method is adjusted the flow accuracy school of calorimeter when use waits, by following formula, determine the accumulative total hot water volume that user heats
In formula, the accumulative total hot water volume that V heats in the time at m τ for user, N
jfor the revolution of mechanical heat meter τ wing impeller in the period under j flow rate working conditions, y
jfor the measuring error of mechanical heat meter under j flow rate working conditions, and at drawn y
kin discrete function, interpolation is chosen.
Claims (2)
1. the equal time interval correcting regulating method of a flow accuracy of calorimeter, the basis that the coefficient of flow of mechanical heat meter of take is flow measurement, standard with normal stream scale as correction mechanical formula heat quantity flow measuring error, it is characterized in that: the flow gamut of calorimeter is divided into several different school flow rate working conditions for the treatment of, and to make each flow rate working conditions measure acquisition time τ be the equal period, meter to be corrected and standard scale carry out synchro measure to each flow rate working conditions, and pass through
determine the flow measurement error of mechanical heat meter;
In formula, y
kfor mechanical heat meter measuring error under k flow rate working conditions in flow gamut, G
k 0for the volumetric flow rate of normal stream scale under k flow rate working conditions, τ is that the measurement that each flow rate working conditions is equal gathers period, N
kfor the revolution of mechanical heat meter τ wing impeller in the period under k flow rate working conditions, the coefficient of flow that is mechanical heat meter (turns/m
3).
2. the equal time interval correcting regulating method of mechanical heat meter flow accuracy as claimed in claim 1, is characterized in that: by
determine the accumulative total hot water volume that user heats;
In formula, the accumulative total hot water volume that V heats in the time at m τ for user, N
jfor the revolution of mechanical heat meter τ wing impeller in the period under j flow rate working conditions, y
jfor the measuring error of mechanical heat meter under j flow rate working conditions, and at drawn y
kin discrete function, interpolation is chosen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510041725 CN1651881A (en) | 2005-02-25 | 2005-02-25 | Equal time interval correcting regulating method for flow accuracy of calorimeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510041725 CN1651881A (en) | 2005-02-25 | 2005-02-25 | Equal time interval correcting regulating method for flow accuracy of calorimeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1651881A true CN1651881A (en) | 2005-08-10 |
Family
ID=34876295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510041725 Pending CN1651881A (en) | 2005-02-25 | 2005-02-25 | Equal time interval correcting regulating method for flow accuracy of calorimeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1651881A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100430704C (en) * | 2005-02-21 | 2008-11-05 | 西北工业大学 | Heat metering method for open-ring central heating system |
| CN106097585A (en) * | 2016-06-15 | 2016-11-09 | 信东仪器仪表（苏州）有限公司 | A kind of IC-card controller charging method and instrument |
| CN107621315A (en) * | 2017-09-05 | 2018-01-23 | 天津市电力科技发展有限公司 | Check method during a kind of on-line operation intelligent calorimeter |
-
2005
- 2005-02-25 CN CN 200510041725 patent/CN1651881A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100430704C (en) * | 2005-02-21 | 2008-11-05 | 西北工业大学 | Heat metering method for open-ring central heating system |
| CN106097585A (en) * | 2016-06-15 | 2016-11-09 | 信东仪器仪表（苏州）有限公司 | A kind of IC-card controller charging method and instrument |
| CN107621315A (en) * | 2017-09-05 | 2018-01-23 | 天津市电力科技发展有限公司 | Check method during a kind of on-line operation intelligent calorimeter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102147450A (en) | Monitoring system for electric quantity of lithium battery | |
| CN109239813B (en) | Multi-metering characteristic verification method and device for skip type rain gauge | |
| WO2006007118A3 (en) | Nullification of measurement error, particularly within a dual turbine flow meter used in a fuel dispenser | |
| CN104849523A (en) | Single-phase watt-hour meter temperature compensation method | |
| CN1651871A (en) | Equal water quantity correcting and regulating method of telemetering water meter accuracy | |
| CN1651881A (en) | Equal time interval correcting regulating method for flow accuracy of calorimeter | |
| CN1858512A (en) | Water heater capable of displaying water flow | |
| CN109901099A (en) | A kind of voltage change automatic compensating method of electric energy meter | |
| CN104165661A (en) | Low-pressure loss differential pressure flow meter and calibrating method and flow metering method of low-pressure loss differential pressure flow meter | |
| CN202210005U (en) | Heat energy meter flow full-automatic detection device | |
| CN102200544A (en) | Method for accumulating aggregate capacitances of smart meter capable of realizing bidirectional metering | |
| CN103292873B (en) | Water taking metering and calibrating method | |
| CN200979509Y (en) | A temperature control valve performance test device | |
| CN1344921A (en) | Separated metering method and system for central air conditioner | |
| CN102741768A (en) | Method for predicting the duration of a future time interval | |
| CN110231074B (en) | Method for rapidly detecting error of water meter | |
| CN101105407A (en) | Air energy-storage volume tube liquid runoff calibration device | |
| CN202041329U (en) | Ultrasonic heat meter | |
| CN1529139A (en) | Automatic calibrating system for heat meter | |
| CN106382243B (en) | Fan air volume compensation algorithm based on constant back electromotive force control | |
| CN114451786A (en) | Control method and device for water treatment device, storage medium and water treatment device | |
| CN205034373U (en) | Liquid packaging machine metering mechanism | |
| CN211696618U (en) | Calibration device for variable water head water flow standard device | |
| CN107976234A (en) | A kind of water meter meter correcting system and its correction method | |
| CN113932889A (en) | Intelligent fuel metering and correcting device based on turbine flowmeter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |