CN103557899A - Gas metering method and device based on energy metering - Google Patents

Gas metering method and device based on energy metering Download PDF

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CN103557899A
CN103557899A CN201310521622.4A CN201310521622A CN103557899A CN 103557899 A CN103557899 A CN 103557899A CN 201310521622 A CN201310521622 A CN 201310521622A CN 103557899 A CN103557899 A CN 103557899A
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gas
energy meter
microprocessor
metering
rock
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CN103557899B (en
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刘勋
赵勇
雷新民
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Chengdu Qianjia Technology Co Ltd
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Abstract

The invention discloses a gas metering method based on energy metering. The gas metering method includes the steps: firstly, measuring components of natural gas by the aid of a gas chromatographic analyzer and determining the mass heating value of the natural gas according to the components of the natural gas; secondly, metering the mass flow rate of the natural gas; finally, determining energy of the natural gas according to the mass heating value and the mass flow rate to meter the energy. The invention further provides a gas metering device based on energy metering, wherein the device implements the method. The components of the natural gas are measured by the aid of the gas chromatographic analyzer, the mass heating value of the natural gas is obtained according to the components of the natural gas, the energy of the natural gas is calculated according to the mass flow rate of the natural gas and can be metered, and the novel metering mode is more reasonable and accurate.

Description

A kind of gas metering method and device based on energy meter
Technical field
The present invention relates to gas metering technical field, the combustible gas metering arrangement of a kind of particularly gas metering method based on energy meter, and realization based on energy meter.
Background technology
Rock gas be clean, high efficient energy sources, therefore increasing town dweller uses rock gas.Gas meter, flow meter is the equipment of metering user combustion gas use amount.Current natural gas metering device, Domestic gas table (Pi Mobiao) is all the volumetric flow rate under working condition of metering (situation during real work) condition, yet the compressibility due to rock gas, volume metering in different temperature and pressure situations is different, causes gas metering inaccurate.Current industry and commerce user adopts flowmeter and volume correction instrument to be used in conjunction with, it (is a standard atmospheric pressure in China that the volume of rock gas is all transformed under a standard state, 101.325KPa and 20 degrees Celsius), with regard to having solved variable volume flow, cause measuring inaccurate problem like this, be convenient to the relevant party clearing that carry on trade.
It is to obtain heat energy that user uses the object of combustion gas, if how much pay combustion gas cost of use according to the heat energy of use, seems more reasonable.Yet gas company by volume charges at present, because the constituent of rock gas is complicated, the constituent of the rock gas of different time separate sources is different, the content of every kind of composition also difference is larger, because the thermal value of every kind of composition is different, therefore, even the rock gas of the same volume under the status of criterion, due to the difference of component, the thermal value of rock gas is also different.Therefore it is also not accurate enough according to combustion gas volume, measuring.
Summary of the invention
The object of the invention is to overcome and existingly in prior art according to volume, carry out gas metering and have the inaccurate deficiency of metering, a kind of gas metering method based on energy meter is provided, a kind of combustible gas metering arrangement of realizing based on energy meter is provided simultaneously.
In order to realize foregoing invention object, the invention provides following technical scheme:
A gas metering method for energy meter, comprises the following steps:
Step 10: combustible gas metering arrangement receives the gas component data that gas chromatographicanalyzer is measured;
Step 20: the microprocessor of combustible gas metering arrangement, according to the component of rock gas, is calculated the mass calorific value of rock gas
Figure BDA0000404367700000021
H ^ 0 ( t 1 ) = H ‾ 0 ( t 1 ) / M , M = Σ j = 1 N ( x j M j ) , H ‾ 0 ( t 1 ) = Σ j = 1 N [ x j · H ‾ j 0 ( t 1 ) ] ; Wherein, M jfor the molal weight of component j in rock gas,
Figure BDA0000404367700000023
for rock gas during as ideal gas, in burning reference condition temperature t 1, pressure P 1mole thermal value of lower component j, x jmole fraction for component j in rock gas, is measured by gas chromatographicanalyzer, the component quantity that N is rock gas;
Step 30: the mass rate V that utilizes the mass rate counting unit metering rock gas of combustible gas metering arrangement m;
Step 40: the microprocessor of combustible gas metering arrangement is according to the mass calorific value of rock gas and mass rate V m, determine the energy E of rock gas, complete energy meter.
The present invention also provides a kind of combustible gas metering arrangement based on energy meter of realizing the inventive method, comprise the power supply unit that electric energy is provided, also comprise microprocessor, described microprocessor receives the gas component data of gas chromatographicanalyzer transmission by wired or wireless mode, microprocessor is also connected with for measuring the mass rate counting unit of quality of natural gas flow; Microprocessor obtains the mass calorific value of rock gas according to gas component data, then according to the mass calorific value of rock gas and mass rate, determines the energy of rock gas.
According to the embodiment of the present invention, described gas chromatographicanalyzer is arranged in the described combustible gas metering arrangement based on energy meter, and gas chromatographicanalyzer passes through I 2c bus or 485 buses or serial ports or network interface connect microprocessor.
Preferably, the described combustible gas metering arrangement based on energy meter also comprises the data remote unit being connected with microprocessor.Described gas chromatographicanalyzer is arranged at the place, total input port of gas pipeline, and gas chromatographicanalyzer is by wired or wireless network connection data teletransmission unit.
Preferably, the described intelligent gas measuring apparatus based on energy meter also comprises pressure transducer and the acousto-optic warning unit being connected with microprocessor.The described intelligent gas measuring apparatus based on energy meter also comprises the GSM/GPRS unit being connected with microprocessor.The described combustible gas metering arrangement based on energy meter also comprises the vibration transducer being connected with microprocessor.
Compared with prior art, beneficial effect of the present invention:
Gas metering method based on energy meter provided by the invention, first measure the component of rock gas, and according to the mass calorific value of the component measuring and calculating rock gas of rock gas, the mass rate obtaining according to the First Astronautic Research Institute for Measurement and Test again obtains the energy of rock gas, realized based on energy meter, be a kind of brand-new gas consumption metering method, and this kind of gas metering mode is more reasonable.
The present invention is based on the combustible gas metering arrangement of energy meter, gas chromatographicanalyzer transfers to gas component after microprocessor, microprocessor obtains the mass calorific value of rock gas according to the component of rock gas, the mass rate of mass rate counting unit metering rock gas, microprocessor can obtain the energy of rock gas according to the quality heating of rock gas and mass rate, and realization is based on energy meter.
Accompanying drawing explanation:
Fig. 1 is the process flow diagram of the gas metering method based on energy meter described in embodiment.
Fig. 2 is a kind of structure composition frame chart of realizing the combustible gas metering arrangement based on energy meter in embodiment.
Fig. 3 is the another kind of structure composition frame chart of the combustible gas metering arrangement based on energy meter in embodiment.
Embodiment
Below in conjunction with test example and embodiment, the present invention is described in further detail.But this should be interpreted as to the scope of the above-mentioned theme of the present invention only limits to following embodiment, all technology realizing based on content of the present invention all belong to scope of the present invention.
With reference to figure 1, the invention provides a kind of gas metering method based on energy meter, comprise the following steps:
Step 10: utilize gas chromatographicanalyzer to measure the component of rock gas, combustible gas metering arrangement receives the gas component data that gas chromatographicanalyzer is measured.Implement this step and can adopt two kinds of embodiments, wherein a kind of embodiment is to adopt the combustible gas metering arrangement that is provided with the gas chromatographicanalyzer based on MEMS, and gas chromatographicanalyzer passes through I 2c bus or 485 buses or serial ports are connected with the microprocessor of combustible gas metering arrangement, and the gas component of gas chromatographicanalyzer collection passes through I 2c bus or 485 buses or serial ports transfer to the microprocessor of combustible gas metering arrangement.
Another kind of embodiment, the component that offers each user's rock gas due to same gas company is the same, therefore can with gas chromatograph, measure the component of rock gas in total input port of (residential quarter) of gas company gas pipeline, then by wireless or cable network (by the network of checking meter of existing intelligent gas measuring apparatus), be transferred to each user's combustible gas metering arrangement.
Step 20: combustible gas metering arrangement is according to the mass calorific value of gas component data measuring and calculating rock gas
Figure BDA0000404367700000041
H ^ 0 ( t 1 ) = H ‾ 0 ( t 1 ) / M , M = Σ j = 1 N ( x j M j ) , H ‾ 0 ( t 1 ) = Σ j = 1 N [ x j · H ‾ j 0 ( t 1 ) ] ; Wherein, M jfor the molal weight of component j in rock gas,
Figure BDA0000404367700000043
for rock gas during as ideal gas, in burning reference condition temperature t 1, pressure P 1mole thermal value of lower component j, in the world t 1can value be 25 ℃, 20 ℃, 15 ℃ or 0 ℃, general, t 1be 20 ℃, P 1it is a standard atmospheric pressure.20 ℃ of burning reference temperatures, mole thermal value of a standard atmospheric pressure component j, can be tabled look-up and be obtained by existing open source information.X jmole fraction for component j in rock gas, is measured by gas chromatographicanalyzer, the component quantity that N is rock gas.
Step 30: the mass rate V of the mass rate counting unit metering rock gas of combustible gas metering arrangement m;
Step 40: the microprocessor of combustible gas metering arrangement is according to the mass calorific value of rock gas and mass rate V m, determine the energy E of rock gas,
Figure BDA0000404367700000051
complete energy meter.
With reference to figure 2, Fig. 3, the present invention also provides a kind of combustible gas metering arrangement based on energy meter, comprise the power supply unit of electric energy and microprocessor are provided, microprocessor is connected with mass rate counting unit, the mass rate of mass rate counting unit metering rock gas.Microprocessor also receives the gas component data of gas chromatographicanalyzer transmission by wireless or wired mode.With reference to figure 3, gas chromatographicanalyzer adopts based on MEMS(MEMS (micro electro mechanical system)) gas chromatographicanalyzer, volume is little, gas chromatographicanalyzer passes through I 2c bus or 485 buses or serial ports or network interface are connected with microprocessor.With reference to figure 3, in combustible gas metering arrangement, be provided with data remote unit and be connected with microprocessor, gas chromatographicanalyzer can connect gas component data transmission to microprocessor by data transmission unit.By this kind of mode, receive the gas component data of gas chromatographicanalyzer transmission, adopt a gas chromatographicanalyzer at place, the total input port of gas pipeline, having avoided arranging gas chromatographicanalyzer on each combustible gas metering arrangement measures each user's gas component, save the usage quantity of gas chromatographicanalyzer equipment, in the situation that realizing based on energy meter, also saved cost.Certain, combustible gas metering arrangement also comprises power supply unit, action button and display screen, power supply unit provides electric energy for whole combustible gas metering arrangement, action button for carrying out data input when needs hand input-data, display screen is used for showing metering result, and action button can embed and in display screen, form touch screen.
Microprocessor receives after the gas component data of gas chromatographicanalyzer transmission, obtains the mass calorific value of rock gas according to the component of rock gas, H ^ 0 ( t 1 ) = H ‾ 0 ( t 1 ) / M , M = Σ j = 1 N ( x j M j ) , H ‾ 0 ( t 1 ) = Σ j = 1 N [ x j · H ‾ j 0 ( t 1 ) ] , Bond quality flow is determined the energy of rock gas again, E = H ^ 0 ( t 1 ) × V m , Realization is based on metering.
The implementation of data remote unit is wired or wireless mode, and wired mode for example carries out teletransmission by M-bus bus, and wireless mode for example wireless network card is realized wireless network transmissions.Data remote unit is except receiving the gas component data of gas chromatographicanalyzer transmission, also can be used for the Natural gas consumption of combustible gas metering arrangement (calculating based on energy) directly to transfer to the monitor terminal of gas company, avoid the person of checking meter to go to each user's family scene to check meter, reduced the workload of the person of checking meter.For the user who pays the fees in advance, gas company also can send user balance information to combustible gas metering arrangement by data remote unit, and shows by display screen, with reminding user, pays the fees and supplements with money in time.
With reference to figure 3, as further preferred embodiment, the combustible gas metering arrangement that the present invention is based on energy meter also comprises pressure transducer, acousto-optic warning unit, vibration transducer and GSM/GPRS unit, pressure transducer, acousto-optic warning unit, vibration transducer and GSM/GPRS unit are all connected with microprocessor.Pressure transducer is for detecting in real time the pressure of rock gas, can learn gas pressure change thus, thereby (gaseous tension is excessive or do not using the time period of combustion gas air pressure change to be detected to judge whether gas leakage, can be judged to be gas leakage), if gas leakage detected, by acousto-optic warning unit, send alerting signal, simultaneously, by GSM/GPRS unit, the mobile phone terminal to user sends SMS message microprocessor, informs that in time user has the information of gas leakage.Vibration transducer is for detection of the shake intensity of combustible gas metering arrangement, and when shake intensity reaches setting value, microprocessor by-pass valve control is closed, and the judder while avoiding earthquake threatens uses gas safety.
Disclosed all features in this instructions, or the step in disclosed all methods or process, except mutually exclusive feature and/or step, all can combine by any way.
Disclosed arbitrary feature in this instructions (comprising any accessory claim, summary and accompanying drawing), unless narration especially all can be replaced by other equivalences or the alternative features with similar object.That is,, unless narration especially, each feature is an example in a series of equivalences or similar characteristics.

Claims (9)

1. the gas metering method based on energy meter, is characterized in that, comprises the following steps:
Step 10: combustible gas metering arrangement receives the gas component data that gas chromatographicanalyzer is measured;
Step 20: the microprocessor of combustible gas metering arrangement, according to the component of rock gas, is calculated the mass calorific value of rock gas
Figure FDA0000404367690000011
H ^ 0 ( t 1 ) = H ‾ 0 ( t 1 ) / M , M = Σ j = 1 N ( x j M j ) , H ‾ 0 ( t 1 ) = Σ j = 1 N [ x j · H ‾ j 0 ( t 1 ) ] ; Wherein, M jfor the molal weight of component j in rock gas,
Figure FDA0000404367690000013
for rock gas during as ideal gas, in burning reference condition temperature t 1, pressure P 1mole thermal value of lower component j, x jmole fraction for component j in rock gas, is measured by gas chromatographicanalyzer, the component quantity that N is rock gas;
Step 30: the mass rate V of the mass rate counting unit metering rock gas of combustible gas metering arrangement m;
Step 40: the microprocessor of combustible gas metering arrangement is according to the mass calorific value of rock gas and mass rate V m, determine the energy E of rock gas, complete energy meter.
2. the gas metering method based on energy meter according to claim 1, is characterized in that, the reference condition temperature t of burning described in step 20 1be 20 ℃, pressure P 1it is a standard atmospheric pressure.
3. realize a kind of combustible gas metering arrangement based on energy meter of method described in claim 1, comprise the power supply unit that electric energy is provided, it is characterized in that, also comprise microprocessor, described microprocessor receives the gas component data of gas chromatographicanalyzer transmission by wired or wireless mode, microprocessor is also connected with for measuring the mass rate counting unit of quality of natural gas flow; Microprocessor obtains the mass calorific value of rock gas according to gas component data, then according to the mass calorific value of rock gas and mass rate, determines the energy of rock gas.
4. be the intelligent gas measuring apparatus based on energy meter according to claim 3, it is characterized in that, described gas chromatographicanalyzer is arranged in the described combustible gas metering arrangement based on energy meter, and gas chromatographicanalyzer passes through I 2c bus or 485 buses or serial ports or network interface connect microprocessor.
5. be the intelligent gas measuring apparatus based on energy meter according to claim 3, it is characterized in that, the described combustible gas metering arrangement based on energy meter also comprises the data remote unit being connected with microprocessor.
6. the combustible gas metering arrangement based on energy meter according to claim 5, is characterized in that, described gas chromatographicanalyzer is arranged at the place, total input port of gas pipeline, and gas chromatographicanalyzer is by wired or wireless network connection data teletransmission unit.
7. be the intelligent gas measuring apparatus based on energy meter according to claim 3, it is characterized in that, the described intelligent gas measuring apparatus based on energy meter also comprises pressure transducer and the acousto-optic warning unit being connected with microprocessor.
8. the intelligent gas measuring apparatus based on energy meter according to claim 3, is characterized in that, the described intelligent gas measuring apparatus based on energy meter also comprises the GSM/GPRS unit being connected with microprocessor.
9. the intelligent gas measuring apparatus based on energy meter according to claim 3, is characterized in that, the described combustible gas metering arrangement based on energy meter also comprises the vibration transducer being connected with microprocessor.
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Cited By (8)

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CN104977394A (en) * 2015-07-16 2015-10-14 莱芜市安诺美姿自动化仪表有限公司 Online fuel gas component and heat value online measuring device
CN109579927A (en) * 2018-11-23 2019-04-05 罗美特（上海）自动化仪表股份有限公司 A kind of calorific value flowmeter
CN110068375A (en) * 2019-05-27 2019-07-30 金卡智能集团股份有限公司 A kind of gas metering method based on energy meter
CN112611826A (en) * 2020-12-31 2021-04-06 武汉泰特沃斯科技有限公司 Online gas chromatography remote monitoring method based on Internet of things technology
CN113379968A (en) * 2021-06-08 2021-09-10 温州大学 Gas pricing method based on spectrum-mass-spectrum combination and internet-of-things technology
CN113570475A (en) * 2021-07-26 2021-10-29 成都秦川物联网科技股份有限公司 Cross-network sharing method and system for energy metering data of intelligent pipe network
CN115790908A (en) * 2023-02-08 2023-03-14 成都千嘉科技股份有限公司 Natural gas metering method and device based on heat metering
US11979697B2 (en) 2021-07-26 2024-05-07 Chengdu Qinchuan Iot Technology Co., Ltd. Methods and internet of things systems for obtaining natural gas energy metering component

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104977394A (en) * 2015-07-16 2015-10-14 莱芜市安诺美姿自动化仪表有限公司 Online fuel gas component and heat value online measuring device
CN109579927A (en) * 2018-11-23 2019-04-05 罗美特（上海）自动化仪表股份有限公司 A kind of calorific value flowmeter
CN110068375A (en) * 2019-05-27 2019-07-30 金卡智能集团股份有限公司 A kind of gas metering method based on energy meter
CN112611826A (en) * 2020-12-31 2021-04-06 武汉泰特沃斯科技有限公司 Online gas chromatography remote monitoring method based on Internet of things technology
CN113379968A (en) * 2021-06-08 2021-09-10 温州大学 Gas pricing method based on spectrum-mass-spectrum combination and internet-of-things technology
CN113570475A (en) * 2021-07-26 2021-10-29 成都秦川物联网科技股份有限公司 Cross-network sharing method and system for energy metering data of intelligent pipe network
CN113570475B (en) * 2021-07-26 2023-10-27 成都秦川物联网科技股份有限公司 Intelligent pipe network energy metering data cross-network sharing method and system
US11979697B2 (en) 2021-07-26 2024-05-07 Chengdu Qinchuan Iot Technology Co., Ltd. Methods and internet of things systems for obtaining natural gas energy metering component
CN115790908A (en) * 2023-02-08 2023-03-14 成都千嘉科技股份有限公司 Natural gas metering method and device based on heat metering
CN115790908B (en) * 2023-02-08 2023-06-23 成都千嘉科技股份有限公司 Natural gas metering method and device based on heat metering

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