CN111720728B - Pressure-limiting gas filling system and filling method - Google Patents
Pressure-limiting gas filling system and filling method Download PDFInfo
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- CN111720728B CN111720728B CN202010413324.3A CN202010413324A CN111720728B CN 111720728 B CN111720728 B CN 111720728B CN 202010413324 A CN202010413324 A CN 202010413324A CN 111720728 B CN111720728 B CN 111720728B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
- F17C5/06—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with compressed gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/002—Details of vessels or of the filling or discharging of vessels for vessels under pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
- F17C13/023—Special adaptations of indicating, measuring, or monitoring equipment having the mass as the parameter
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
- F17C13/025—Special adaptations of indicating, measuring, or monitoring equipment having the pressure as the parameter
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/04—Arrangement or mounting of valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
- F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
- F17C2205/0323—Valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
- F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
- F17C2205/0323—Valves
- F17C2205/0335—Check-valves or non-return valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0107—Single phase
- F17C2223/0123—Single phase gaseous, e.g. CNG, GNC
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/04—Indicating or measuring of parameters as input values
- F17C2250/0404—Parameters indicated or measured
- F17C2250/0421—Mass or weight of the content of the vessel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/04—Indicating or measuring of parameters as input values
- F17C2250/0404—Parameters indicated or measured
- F17C2250/043—Pressure
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses a pressure-limiting gas filling system and a filling method, and relates to the technical field of gas filling, wherein the pressure-limiting gas filling system comprises a data acquisition module, a pre-filling calculation module, a real-time monitoring module and an execution module; the pressure-limiting gas filling method comprises the steps of pre-filling, data acquisition, numerical value calculation, formal filling and filling monitoring; by collecting m pre-filled n timesn、PnCalculating the initial filling quality m according to the data value (wherein n is more than or equal to 2)0Volume V and limit filling m of pressure vesselmaxAnd the safe filling is realized through multiple monitoring. The invention solves the problem that the safety risk caused by excessive filling and overpressure filling is easy to generate when compressed gas is filled, improves the safety of the filling process, has simple working procedure and high operation efficiency, and is suitable for filling various pressure containers under different pressures.
Description
Technical Field
The invention relates to the technical field of gas filling, in particular to a pressure-limiting gas filling system and a filling method.
Background
With the support and development of strong policies of the state on clean energy, at present, filling stations mainly based on natural gas are continuously increased, and the filling stations are widely applied, but a gas filling system and a gas filling method adopted in the industry cannot accurately calculate the specific maximum filling threshold value of the pressure container, and a plurality of potential safety hazards exist in the gas filling process.
For example, in the method for filling a tank with pressurized gas disclosed in patent No. 200880024843.8, application date of 2008, 4, 17, the filling of the gas is achieved by only forming a pressure difference by the buffer container, but the method cannot monitor the pressure and temperature of the gas in the pressure container in real time, cannot know the volume of the pressure container and the initial mass in the pressure container, cannot know the maximum filling amount of the pressure container which can be filled according to different specified pressures, is easy to generate safety risks caused by over-filling and over-pressure filling when the compressed gas is filled, and cannot ensure the use safety of the equipment and the personal safety of related personnel.
Disclosure of Invention
The invention aims to: aiming at the existing problems, the invention provides a pressure-limiting gas filling system and a filling method, which solve the problem that safety risks are easily caused by over-filling and over-pressure filling when compressed gas is filled, can monitor the pressure and the temperature of the gas in a pressure container in real time, can calculate the volume of the pressure container and the initial quality in the pressure container according to a pre-filling procedure, and can obtain the maximum filling amount of the pressure container according to different set pressures. The gas filling device has the advantages that the gas filling is safer, the limitation that the gas filling can be carried out only according to the specified pressure container in the gas filling process is broken through, the gas filling device is suitable for filling various pressure containers under different pressures, the application range is wider, and the application scene is more diversified.
The technical scheme adopted by the invention is as follows:
a pressure-limiting gas filling system comprises a data acquisition module, a pre-filling calculation module, a real-time monitoring module and an execution module, wherein the data acquisition module is respectively connected with the pre-filling calculation module and the real-time monitoring module, the pre-filling calculation module is in signal connection with the real-time monitoring module, the real-time monitoring module is in signal connection with the execution module, and the execution module is connected with an electromagnetic valve; the data acquisition module acquires the m measured n times of pre-filling through the mass flow meter and the pressure sensor and transmits the m measured n times of pre-filling to the pre-filling calculation modulen、PnA data value (where n ≧ 2); the pre-filling calculation module is based on mn、Pn、PThreshold(s)Data value, calculating to obtain limit filling quantity mmaxThe value is obtained.
Due to the adoption of the technical scheme, the limit filling amount of the pressure container can be obtained through n times of pre-filling calculation, and the problem that the quality of the limit gas which can be contained in the pressure container cannot be known in the filling process of the gas is solved.
Further the pre-filling calculation module is based on a limit filling amount mmaxValue, set and send to the real-time monitoring module the safe charge mSecureA value; the real-time monitoring module receives m acquired by the data acquisition module in real timeCharging deviceValue, and mCharging deviceValue and setting mSecureValue comparison when mCharging device≥mSecureAnd when the electromagnetic valve is closed, sending an execution signal to the execution module to close the electromagnetic valve.
Due to the adoption of the technical scheme, when the filling amount reaches the threshold value, filling is stopped, the whole filling process is monitored in real time, and potential safety hazards caused by wrong filling can be effectively eliminated.
Further, said mSecureThe value is less than or equal to the limit charge.
Due to the adoption of the technical scheme, the filling threshold is less than or equal to the limit filling amount, so that the problems of excessive filling and overpressure filling caused by errors caused by data acquisition and calculation in actual application are solved.
Further, the number of times of priming n is 2, and the priming calculation module can calculate the initial filling quality m of the pressure container based on the following formula (1)0：
m0＝P1T2m2/(P2T1-P1T2)-m1 (1)
In the formula (1), "P1"is the gas pressure in the pressure vessel collected by the pressure sensor after the 1 st pre-filling process," T1"is the gas temperature in the pressure vessel calculated after the 1 st preliminary filling step," m1"is the filling quality collected by the mass flowmeter after the 1 st preliminary filling process," P2"is the gas pressure in the pressure vessel collected by the pressure sensor after the 2 nd pre-filling process," T2"is the gas temperature in the pressure vessel calculated after the 2 nd preliminary filling process," m2"is collected by a mass flow meter after the 2 nd pre-filling procedureThe filling quality of the collection; wherein T is1And T2And calculating the temperature through a temperature compensation mode of the temperature measured by the mass flowmeter.
The prefill calculation module is capable of calculating a volume V of the pressure vessel based on the following equation (2):
V＝Z(m0+m1+m2)RT2/P2M (2)
in formula (2), "Z" is a natural gas deviation coefficient and is a fixed value, "R" is a general gas constant, and "M" is a molar mass of a substance.
By adopting the technical scheme, when gas is filled, the filling quality and pressure during two times of pre-filling are collected, and the initial filling quality m can be calculated0And the actual volume V of the pressure vessel, such that the initial filling mass m is a function of0Maximum charge m obtainedmaxMore accurate, in practical application, even if a certain amount of gas is left in the pressure container before the gas is filled, excessive filling and overpressure filling cannot occur, and meanwhile, the gas filling can be safely performed under the condition that the volume of the pressure container is unknown.
A pressure-limiting gas filling method comprises the following steps:
pre-charging: connecting the pressure container with an inflation pipeline, and pre-filling the pressure container for n times (wherein n is more than or equal to 2);
a data acquisition step: respectively collecting m times of prefilling n times by switching off a mass flow meter, a pressure sensor and an electromagnetic valve which are arranged on an inflation pipelinen、PnA data value (where n ≧ 2);
and (3) numerical calculation: according to a preset charging threshold pressure PThreshold(s)Value based on m collectedn、PnData value, calculating to obtain limit filling quantity mmaxValue and setting a safe charge mSecureA value;
formal filling: based on safe filling amount mSecureAnd controlling the amount of gas charged to the pressure vessel.
Due to the adoption of the technical scheme, the limit filling amount of the pressure container can be obtained through n times of pre-filling calculation, the problem that the quality of the limit gas which can be contained in the pressure container cannot be known in the filling process of the gas is solved, and meanwhile, the safety of the gas in the filling process can be improved according to the set maximum filling pressure and the set safe filling amount threshold.
Further, the pressure-limiting gas filling method also comprises
Filling monitoring: respectively collecting m of gas filled in real time through a mass flow meter and a pressure sensor arranged on an inflation pipelineCharging device、PCharging deviceValue of mCharging deviceValue and mSecureValue comparison when mCharging device≥mSecureAnd closing the electromagnetic valve to stop gas filling.
By adopting the technical scheme, the whole filling process is monitored in real time, and when the filling amount or the filling pressure reaches a threshold value, filling is stopped, so that the potential safety hazard caused by wrong filling can be effectively reduced, and the phenomena of excessive filling and overpressure filling can be avoided.
Further, according to the collected PnThe value and the temperature change coefficient value are obtained to obtain the temperature T of the gas in the pressure container after each pre-fillingnValue, m obtained from n times of preliminary fillingn、Pn、TnValue, combined with the initial filling quality m of the pressure vessel0At the moment of obtaining the initial filling quality m0Based on the measured pressure, the volume V of the pressure vessel is calculated, based on the set filling maximum pressure PThreshold(s)Volume V of the pressure vessel and initial filling quality m of the pressure vessel0Obtaining the limit filling amount mmaxSetting a safe filling amount mSecureLess than or equal to limit filling amount mmaxThe value is obtained.
By adopting the technical scheme, when gas is filled, the initial filling quality m can be calculated according to the filling quality and pressure acquired during n times of pre-filling0And the actual volume V of the pressure vessel, such that the initial filling mass m is a function of0Maximum charge m obtainedmaxIs more accurate. In practical applicationThe gas filling device can ensure that even if a certain mass of gas is left in the pressure container before the pressure container is filled with gas, the phenomena of excessive filling and overpressure filling can not occur, and simultaneously, the gas filling can be safely carried out under the condition that the volume of the pressure container is unknown.
Further, n is 2, and the data acquisition step acquires the filling quality m of the 1 st pre-filling1And pressure P12 nd prefill filling quality m2And pressure P2(ii) a Initial filling quality m of the pressure vessel0Calculated according to the following formula (1),
m0＝P1T2m2/(P2T1-P1T2)-m1 (1)
in the formula (1), "P1"is the gas pressure in the pressure vessel collected by the pressure sensor after the 1 st pre-filling process," T1"is the gas temperature in the pressure vessel calculated after the 1 st preliminary filling step," m1"is the filling quality collected by the mass flowmeter after the 1 st preliminary filling process," P2"is the gas pressure in the pressure vessel collected by the pressure sensor after the 2 nd pre-filling process," T2"is the gas temperature in the pressure vessel calculated after the 2 nd preliminary filling process," m2"is the filling quality (where T is the filling quality collected by the mass flow meter after the 2 nd preliminary filling process1And T2And calculating the temperature through a temperature compensation mode of the temperature measured by the mass flowmeter. ) (ii) a
The volume V of the pressure vessel is calculated according to the following formula (2),
V＝Z(m0+m1+m2)RT2/P2M (2)
in formula (2), "Z" is a natural gas deviation coefficient and is a fixed value, "R" is a general gas constant, and "M" is a molar mass of a substance.
By adopting the technical scheme, when gas is filled, the filling quality and pressure during two times of pre-filling are collected, and the initial filling quality m can be calculated0And the actual volume V of the pressure vessel, the process is simple, and the operation efficiency is high.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the method solves the problem that the safety risk caused by excessive filling and overpressure filling is easy to generate when the compressed gas is filled, and improves the safety of the filling process.
2. According to the method, the charging amount threshold (wherein n is more than or equal to 2) is calculated through the numerical value acquired by n times of pre-charging, the process is simple, and the operation efficiency is high.
3. The method is suitable for filling various pressure containers under different pressures, and has wider application range and more diversified application scenes.
4. The method can be used for filling gas into the pressure container with certain mass of gas left in the pressure container before filling gas.
5. The method can monitor the filling amount of the pressure container and the pressure and temperature of the gas in the pressure container in real time during filling, and further improve the safety during gas filling.
Drawings
FIG. 1 is a block diagram of an apparatus in accordance with an embodiment of the present invention;
FIG. 2 is a system block diagram of the present invention;
fig. 3 is a flow chart of the gas filling process of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
A pressure-limiting gas filling system is disclosed, as shown in figure 1 and figure 2, wherein gas is filled into a pressure container from a gas source through a filling device, and the gas filling device comprises a solenoid valve and a massThe pressure container and the filling device are provided with a one-way check valve; the pressure-limiting gas filling system comprises a data acquisition module, a pre-filling calculation module, a real-time monitoring module and an execution module, wherein the data acquisition module is respectively in signal connection with the pre-filling calculation module and the real-time monitoring module; the data acquisition module acquires and transmits m times of pre-filling to the pre-filling calculation module through the mass flow meter and the pressure sensorn、PnA data value (where n ≧ 2); the pre-filling calculation module is based on mn、PnData value, calculating to obtain limit filling quantity mmaxThe value is obtained.
The pre-filling calculation module is based on a limit filling amount mmaxValue, set and send to the real-time monitoring module the safe charge mSecureA value; the real-time monitoring module receives m acquired by the data acquisition module in real timeCharging deviceA value of m, andcharging deviceValue and setting mSecureValue comparison when mCharging device≥mSecureAnd when the electromagnetic valve is closed, sending an execution signal to the execution module to close the electromagnetic valve.
Example 2
Based on embodiment 1, as shown in fig. 2 and 3, the pre-filling number n is 2, and the pre-filling calculation module can calculate the initial filling quality m of the pressure container based on the following formula (1)0：
m0＝P1T2m2/(P2T1-P1T2)-m1 (1)
In the formula (1), "P1"is the gas pressure in the pressure vessel collected by the pressure sensor after the 1 st pre-filling process," T1"is the gas temperature in the pressure vessel calculated after the 1 st preliminary filling step," m1"is the filling quality acquired by the mass flowmeter in the 1 st preliminary filling process," P2"is collected by pressure sensor after 2 nd pre-filling procedurePressure of gas in the pressure vessel, "T2"is the gas temperature in the pressure vessel calculated after the 2 nd preliminary filling process," m2"is the filling quality collected by the mass flowmeter after the 2 nd pre-filling process; wherein T is1And T2And calculating the temperature through a temperature compensation mode of the temperature measured by the mass flowmeter.
The prefill calculation module is capable of calculating a volume V of the pressure vessel based on the following equation (2): v ═ Z (m)0+m1+m2)RT2/P2M (2)；
The pre-charging calculation module can calculate the limit charging amount m based on the following formula (3), formula (4) and formula (5)max，
n＝m/M (3)
In formula (3), "M" is the mass of the substance and "M" is the molar mass of the substance;
mthreshold(s)＝PThreshold(s)VM/ZRTThreshold(s) (4)
In the formula (4), "PThreshold(s)"is the set filling pressure threshold of the pressure vessel," TThreshold(s)"temperature threshold calculated according to filling pressure threshold", "mThreshold(s)"is the total gas mass that can be accommodated by the pressure vessel within the charging pressure threshold;
mmax＝mthreshold(s)-m0 (5)。
Example 3
A pressure-limiting gas filling method is disclosed, as shown in figures 1 and 3, a filling device is used for filling gas from a gas source to a pressure container, the gas filling device comprises a solenoid valve, a mass flow meter and a pressure sensor, and a one-way check valve is arranged between the pressure container and the filling device; the pressure type gas filling method comprises the following steps:
pre-charging: connecting the pressure container with an inflation pipeline, and pre-filling the pressure container for n times (wherein n is more than or equal to 2);
a data acquisition step: respectively collecting m times of prefilling n times by switching off a mass flow meter, a pressure sensor and an electromagnetic valve which are arranged on an inflation pipelinen、PnA data value (where n ≧ 2);
and (3) numerical calculation: according to a preset charging threshold pressure PThreshold(s)Value based on m collectedn、PnData value, calculating to obtain limit filling quantity mmaxValue and setting a safe charge mSecureA value;
formal filling: based on safe filling amount mSecureAnd controlling the amount of gas charged to the pressure vessel. The pressure-limiting gas filling method also comprises
Filling monitoring: respectively collecting m of gas filled in real time through a mass flow meter and a pressure sensor arranged on an inflation pipelineCharging device、PCharging deviceValue of mCharging deviceValue and mSecureValue comparison when mCharging device≥mSecureAnd closing the electromagnetic valve to stop gas filling.
The principles and embodiments of the present invention are explained herein using specific examples, which are set forth only to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (2)
1. A pressure limiting type gas filling system is characterized in that: the intelligent monitoring system comprises a data acquisition module, a pre-filling calculation module, a real-time monitoring module and an execution module, wherein the data acquisition module is respectively connected with the pre-filling calculation module and the real-time monitoring module, the pre-filling calculation module is in signal connection with the real-time monitoring module, the real-time monitoring module is in signal connection with the execution module, and the execution module is connected with an electromagnetic valve; the data acquisition module acquires and transmits the pre-filling quality m of the 1 st pre-filling measured by the pre-filling 2 times to the pre-filling calculation module through the mass flowmeter and the pressure sensor1And pressure P12 nd prefill filling quality m2And pressure P2(ii) a The pre-filling calculation module is based on the obtained m1、m2、P1、P2The data value is calculated from the following equation (1) to calculate the initial gas mass m in the pressure vessel0：
m0＝P1T2m2/(P2T1-P1T2)-m1 (1)
In the formula (1), "P1"is the gas pressure in the pressure vessel collected by the pressure sensor after the 1 st pre-filling process," T1"is the gas temperature in the pressure vessel calculated after the 1 st preliminary filling step," m1"is the filling quality acquired by the mass flowmeter in the 1 st preliminary filling process," P2"is the gas pressure in the pressure vessel collected by the pressure sensor after the 2 nd pre-filling process," T2"is the gas temperature in the pressure vessel calculated after the 2 nd preliminary filling process," m2"is the fill quality collected by the mass flow meter after the 2 nd prefill procedure, where T1And T2Calculating the temperature measured by the mass flowmeter in a temperature compensation mode;
the prefill calculation module is capable of calculating a volume V of the pressure vessel based on the following equation (2):
V＝Z(m0+m1+m2)RT2/P2M (2)
in formula (2), "Z" is the natural gas deviation coefficient and is a fixed value, "R" is the universal gas constant, "M" is the molar mass of the substance;
the pre-charging calculation module can calculate the limit charging amount m based on the following formula (3), formula (4) and formula (5)max，
n＝m/M (3)
In formula (3), "M" is the mass of the substance and "M" is the molar mass of the substance;
mthreshold(s)＝PThreshold(s)VM/ZRTThreshold(s) (4)
In the formula (4), "PThreshold(s)"is the set filling pressure threshold of the pressure vessel," TThreshold(s)"temperature threshold calculated according to filling pressure threshold", "mThreshold(s)"is the total gas mass that can be accommodated by the pressure vessel within the charging pressure threshold;
mmax＝mthreshold(s)-m0 (5)；
The pre-filling calculation module is based on a limit filling amount mmaxValue, set and send to the real-time monitoring module the safe charge mSecureValue, said safe charge mSecureLess than or equal to limit filling amount mmax(ii) a The real-time monitoring module receives m acquired by the data acquisition module in real timeCharging deviceA value of m, andcharging deviceValue and set safe charge mSecureValue comparison when mCharging device≥mSecureAnd when the electromagnetic valve is closed, sending an execution signal to the execution module to close the electromagnetic valve.
2. A pressure-limiting gas filling method is characterized in that: it comprises the following steps:
pre-charging: connecting the pressure container with an inflation pipeline, and pre-charging the pressure container for 2 times;
a data acquisition step: respectively collecting the filling quality m of the 1 st pre-filling through the turn-off of a mass flow meter, a pressure sensor and an electromagnetic valve which are arranged on the gas charging pipeline1And pressure P12 nd prefill filling quality m2And pressure P2；
And (3) numerical calculation: according to a preset charging threshold pressure PThreshold(s)Value based on m collected1、m2、P1、P2The data value and the temperature change coefficient value obtain the temperature T of the gas in the 1 st pre-filled rear pressure container1Data value, and temperature T of gas in 2 nd prefilled post-pressure vessel2Data value, m from 2 pre-fills1、m2、P1、P2、T1、T2Data values, combined to obtain an initial filling quality m of the pressure vessel0Initial filling mass m of said pressure vessel0Calculated according to the following formula (1),
m0＝P1T2m2/(P2T1-P1T2)-m1 (1)
in the formula (1), "P1"is the gas pressure in the pressure vessel collected by the pressure sensor after the 1 st pre-filling process," T1"is the gas temperature in the pressure vessel calculated after the 1 st preliminary filling step," m1"is the filling quality collected by the mass flowmeter after the 1 st preliminary filling process," P2"is the gas pressure in the pressure vessel collected by the pressure sensor after the 2 nd pre-filling process," T2"is the gas temperature in the pressure vessel calculated after the 2 nd preliminary filling process," m2"is the fill quality collected by the mass flow meter after the 2 nd prefill procedure, where T1And T2Calculating the temperature measured by the mass flowmeter in a temperature compensation mode;
at the initial filling quality m0On the basis of (1), calculating the volume V of the pressure container, wherein the volume V of the pressure container is calculated according to the following formula (2),
V＝Z(m0+m1+m2)RT2/P2M (2)
in formula (2), "Z" is the natural gas deviation coefficient and is a fixed value, "R" is the universal gas constant, "M" is the molar mass of the substance;
according to the set maximum filling pressure PThreshold(s)Volume V of the pressure vessel and initial filling quality m of the pressure vessel0Obtaining the limit filling amount mmaxSaid limit charge mmaxCalculated according to the following formulas (3), (4) and (5),
n＝m/M (3)
in formula (3), "M" is the mass of the substance and "M" is the molar mass of the substance;
mthreshold(s)＝PThreshold(s)VM/ZRTThreshold(s) (4)
In the formula (4), "PThreshold(s)"is the set filling pressure threshold of the pressure vessel," TThreshold(s)"temperature threshold calculated according to filling pressure threshold", "mThreshold(s)Is a filling pressure thresholdThe total gas mass that the internal pressure vessel can contain;
mmax＝mthreshold(s)-m0 (5)；
According to the limit filling amount mmaxSetting a safe filling amount mSecureSaid safe filling amount mSecureLess than or equal to limit filling amount mmax；
Formal filling: based on the limit filling amount mmaxA value controlling a gas filling amount into the pressure vessel;
filling monitoring: respectively collecting m of gas filled in real time through a mass flow meter and a pressure sensor arranged on an inflation pipelineCharging device、PCharging deviceValue of mCharging deviceValue and mSecureValue comparison when mCharging device≥mSecureAnd closing the electromagnetic valve to stop gas filling.
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| CN103438349A (en) * | 2013-08-18 | 2013-12-11 | 浙江大学 | Hydrogen storage cylinder and method capable of controlling rapid temperature rise of high pressure hydrogen |
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| CN102713405A (en) * | 2009-10-21 | 2012-10-03 | 耐尔氢气有限公司 | Method for the operation and control of gas filling |
| CN103438349A (en) * | 2013-08-18 | 2013-12-11 | 浙江大学 | Hydrogen storage cylinder and method capable of controlling rapid temperature rise of high pressure hydrogen |
| CN107110674A (en) * | 2014-10-02 | 2017-08-29 | 布瑞思怀斯有限责任公司 | For the method and apparatus for monitoring, communicating with the Fluid Volume in analysis casing |
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