CN104677439A - Hydrogen gas flow rate detecting system and hydrogen gas flow rate detecting system - Google Patents
Hydrogen gas flow rate detecting system and hydrogen gas flow rate detecting system Download PDFInfo
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- CN104677439A CN104677439A CN201310629907.XA CN201310629907A CN104677439A CN 104677439 A CN104677439 A CN 104677439A CN 201310629907 A CN201310629907 A CN 201310629907A CN 104677439 A CN104677439 A CN 104677439A
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Abstract
The invention discloses a hydrogen gas flow rate detecting system and a hydrogen gas flow detecting system. The system comprises a pressure reducing valve, a primary switch ball valve, a flow rate regulating valve, a flow rate regulating valve, a pressure sensor, a detected flow rate meter, a pressure sensor, a stagnation container opening-closing ball valve, a stagnation container, a sound speed spray nozzle, a pneumatic switch valve, an outlet container and a back-fire relief valve which are arranged on a high-pressure gas cylinder primary pipeline in sequence. The hydrogen gas flow rate detecting system can increase the detecting precision of the hydrogen gas and can reduce the measuring errors of the hydrogen gas consumption amount.
Description
Technical field
The present invention relates to field of flow detection, particularly a kind of hydrogen flowing quantity detection system and hydrogen flowing quantity detection method.
Background technology
Hydrogen with its cleanliness without any pollution, efficient, can store and transport, and the advantage such as wide material sources, be regarded as optimal energy carrier.Many experts and scholars think, consider from combined factors such as economy, technical, maneuverability and environmental friendliness features, and Hydrogen Energy is the power fuel of following most possible substitute fossil fuels.Hydrogen Energy and regenerative resource combine, by complete for formation one reproducible complete energy resource system.
Hydrogen flowing quantity detection method conventional at present utilizes flowmeter survey hydrogen flowing quantity, adopts flowmeter to measure the hydrogen flowing quantity flowed in fuel supply conduit continuously, draws hydrogen gas consumption.
But the hydrogen gas consumption error that this detection method draws is larger.
Summary of the invention
The embodiment of the present invention provides a kind of hydrogen flowing quantity detection system and hydrogen flowing quantity detection method, can improve the accuracy of detection of hydrogen, reduces hydrogen gas consumption measuring error.
The embodiment of the present invention adopts following technical scheme:
A kind of hydrogen flowing quantity detection system, comprising: be installed on the reduction valve on gas cylinder main line, main line switching ball, flow control valve, flow control valve, pressure transducer, tested flowmeter, pressure transducer, stagnation container valve ball valve, stagnation container, sonic nozzle, pneumatic on-off valve, exit vessel, spark arrester successively.
Optionally, setting pressure sensor, temperature sensor on described stagnation container.
Optionally, setting pressure sensor on described exit vessel.
Optionally, described gas cylinder main line installs at least one branch switch ball valve.
Optionally, flexible pipe is adopted to be connected between described gas cylinder with described reduction valve.
Optionally, described tested flowmeter is connected with the flexible pipe of described pressure sensor application ring flange interface.
The above-mentioned hydrogen flowing quantity detection system of a kind of application carries out hydrogen flowing quantity detection method, comprising:
Open main line valve, open flow control valve, open sonic nozzle pneumatic on-off valve, with purging bottle, rear closedown sonic nozzle pneumatic on-off valve is purged to whole pipeline, close flow control valve, close main line valve;
Open main line valve, open flow control valve, close sonic nozzle pneumatic on-off valve with after hydrogen purge pipeline, close flow control valve, close main line valve;
Open main line valve, open flow control valve, by reduction valve, stagnation container pressure is remained on more than 0.3Mpa with hydrogen;
Wait for that line-pressure sensor is consistent with stagnation container pressure, when measured stream gauge reading is 0, open sonic nozzle pneumatic on-off valve;
Measure hydrogen flowing quantity after flowmeter numerical stability, obtain measurement result.
Optionally, the calculating formula of described sonic nozzle measurement hydrogen quality flow is:
In formula:
Q
m---mass rate kg/s;
A
*---nozzle throat area of section m
2;
C---efflux coefficient;
C
*---actual gas critical flow;
P
0---the absolute stagnation pressure Pa of nozzle entrance place gas;
R---universal gas constant J/ (kmolK);
The molal weight kg/kmol of M---gas;
T
0---the absolute stagnation temperature K of gas;
A
*---determined by processing result or obtain through measuring.
Based on technique scheme, the hydrogen flowing quantity detection system of the embodiment of the present invention and hydrogen flowing quantity detection method, can improve the accuracy of detection of hydrogen, reduces hydrogen gas consumption measuring error.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The structural representation of a kind of hydrogen flowing quantity detection system that Fig. 1 provides for the embodiment of the present invention 1.
In accompanying drawing: 1 is gas cylinder, 2 is gas cylinder main line, 3 is reduction valve, 4 is main line switching ball, 5 is flow control valve, 6 is flow control valve, 7 is pressure transducer, 8 is tested flowmeter, 9 is pressure transducer, 10 is stagnation container valve ball valve, 11 is temperature sensor, 12 is temperature sensor, 13 is pressure transducer, 14 is stagnation container, 15 is sonic nozzle, 16 is sonic nozzle, 17 is sonic nozzle, 18 is pneumatic on-off valve, 19 is pneumatic on-off valve, 20 is pneumatic on-off valve, 21 is exit vessel, 22 is pressure transducer, 23 is branch switch ball valve, 24 is branch switch ball valve, 25 is branch switch ball valve, 26 is spark arrester.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment 1
As shown in Figure 1, the present embodiment provides a kind of hydrogen flowing quantity detection system, comprise: be installed on the reduction valve (3) on gas cylinder main line successively, main line switching ball (4), flow control valve (5), (6), pressure transducer (7), tested flowmeter (8), pressure transducer (9), stagnation container valve ball valve (10), stagnation container (14), sonic nozzle (15), sonic nozzle (16), sonic nozzle (17), pneumatic on-off valve (18), pneumatic on-off valve (19), pneumatic on-off valve (20), exit vessel (21) and spark arrester (26).
Wherein, in gas cylinder, hydrogen is housed, gas cylinder main line is used for exporting hydrogen from gas cylinder.
Optionally, stagnation container (14) is equipped with pressure transducer (13), temperature sensor (11), temperature sensor (12), exit vessel is equipped with pressure transducer (22).Main line is equipped with branch switch ball valve (27), branch switch ball valve (24), branch switch ball valve (25), gas in pipeline can be discharged by branch switch ball valve at any time.
Optionally, flexible pipe is adopted to be connected between gas cylinder (1) with reduction valve (3).
Optionally, the flexible pipe of ring flange interface is adopted to be connected between tested flowmeter (8) with pressure transducer (9).Flowmeter relies on Liftable base to support.
In the present embodiment, gas cylinder end adopts flexible pipe to connect, and can take into account different types of gas cylinder.There are two places' hand switch ball valve (4), (10) in trunk roads, can air feed be stopped under ensureing the emergency circumstance.Two flow control valves (5), (6) adopt and are connected in parallel, and ensure that more wide in range flow regulation is interval.Adopt flexible pipe to connect before and after flowmeter, be convenient for changing different types of flowmeter, pressure transducer (13) precision on stagnation container is 0.1%FS, and sample frequency reaches 10Hz, ensure that the accuracy of experiment.The method avoids the instability owing to causing meter readings after pressure variations influence stagnation container during unlatching gas cylinder (1) simultaneously.
In example of the present invention, first opened by high-pressure gas cylinder valve, open main line valve (4), (10), flow control valve (5), (6) aperture are 100%.Open three sonic nozzle pneumatic on-off valves (18), (19), (20), with purging bottle, purging is carried out to whole pipeline and after about 30 seconds, close three sonic nozzle pneumatic on-off valves (18), (19), (20) successively, flow control valve (5), (6) aperture are 0%, close main line valve (4), (10).Again open main line valve (4), (10) afterwards, now high pressure gas pressure of the inside of a bottle is 6.252Mpa, and flow control valve (5), (6) aperture are 100%, and in pipeline, pressure is 0.427Mpa, and stagnation container pressure is 0.43Mpa.Meter readings is 0.Open the sonic nozzle pneumatic on-off valve (20) needing to measure.Wait for that after about 80 seconds, flowmeter flow tends towards stability, start to record data, meter readings is obtained by flowmeter self communication, and sonic nozzle quality is according to calculating with the formula.
The hydrogen flowing quantity detection system of the present embodiment, can improve the accuracy of detection of hydrogen, reduces hydrogen gas consumption measuring error.
Embodiment 2
The present embodiment provides system described in a kind of Application Example 1 to carry out hydrogen flowing quantity detection method, comprising:
Open main line valve, open flow control valve, open sonic nozzle pneumatic on-off valve, with purging bottle, rear closedown sonic nozzle pneumatic on-off valve is purged to whole pipeline, close flow control valve, close main line valve;
Open main line valve, open flow control valve, close sonic nozzle pneumatic on-off valve with after hydrogen purge pipeline, close flow control valve, close main line valve;
Open main line valve, open flow control valve, by reduction valve, stagnation container pressure is remained on more than 0.3Mpa with hydrogen;
Wait for that line-pressure sensor is consistent with stagnation container pressure, when measured stream gauge reading is 0, open sonic nozzle pneumatic on-off valve;
Measure hydrogen flowing quantity after flowmeter numerical stability, obtain measurement result.
Optionally, the calculating formula of described sonic nozzle measurement hydrogen quality flow is:
In formula:
Q
m---mass rate kg/s;
A
*---nozzle throat area of section m
2;
C---efflux coefficient;
C
*---actual gas critical flow;
P
0---the absolute stagnation pressure Pa of nozzle entrance place gas;
R---universal gas constant J/ (kmolK);
The molal weight kg/kmol of M---gas;
T
0---the absolute stagnation temperature K of gas;
A
*---determined by processing result or obtain through measuring.
A is known quantity, is determined or try to achieve through measuring by processing result.
C has two kinds to ask method, and the experimental formula that the first provides according to ISO9300 calculates, and under the condition of the installation conformed with the regulations and request for utilization, the relative error of the efflux coefficient of trying to achieve like this is ± 0.5%, and the fiducial probability of this error is 95%.It two is asked for by standardization, requires to be arranged on gas flow standard device, survey out the gas mass flow flowing through nozzle, then go out efflux coefficient by above formula inverse by nozzle according to vertification regulation.
C
*according to the regulation of ISO9300, the method that available its accuracy any has been verified calculates, and for the critical flow of several conventional gas, can obtain by looking into the annex getting ISO9300.
P
0measure in nozzle upstream pressure, the position of its pressure tappings is chosen and pressure require should in accordance with the regulation of code.
R, to all gas, gets 8314.4.
M, to surveyed gas, can look into gas property table and obtain (molecular weight).
T
0measure in nozzle upstream, the position of its thermometer hole is chosen and thermometric require should in accordance with the regulation of code.
Beneficial effect of the present invention is: gas cylinder end adopts flexible pipe to connect, and can take into account different types of gas cylinder.There are two places' hand switch ball valve (4), (10) in trunk roads, can air feed be stopped under ensureing the emergency circumstance.Two flow control valves (5), (6) adopt and are connected in parallel, and ensure that more wide in range flow regulation is interval.Adopt flexible pipe to connect before and after flowmeter, be convenient for changing different types of flowmeter, pressure transducer (13) precision on stagnation container is 0.1%FS, and sample frequency reaches 10Hz, ensure that the accuracy of experiment.The method avoids the instability owing to causing meter readings after pressure variations influence stagnation container during unlatching gas cylinder (1) simultaneously.
Those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (8)
1. a hydrogen flowing quantity detection system, it is characterized in that, comprising: be installed on the reduction valve on gas cylinder main line, main line switching ball, flow control valve, flow control valve, pressure transducer, tested flowmeter, pressure transducer, stagnation container valve ball valve, stagnation container, sonic nozzle, pneumatic on-off valve, exit vessel, spark arrester successively.
2. system according to claim 1, is characterized in that, setting pressure sensor, temperature sensor on described stagnation container.
3. system according to claim 1, is characterized in that, setting pressure sensor on described exit vessel.
4. system according to claim 1, is characterized in that, described gas cylinder main line is installed at least one branch switch ball valve.
5. system according to claim 1, is characterized in that, adopts flexible pipe to be connected between described gas cylinder with described reduction valve.
6. system according to claim 1, is characterized in that, described tested flowmeter is connected with the flexible pipe of described pressure sensor application ring flange interface.
7. application rights requires that the hydrogen flowing quantity detection system according to any one of 1 to 6 carries out a hydrogen flowing quantity detection method, it is characterized in that, comprising:
Open main line valve, open flow control valve, open sonic nozzle pneumatic on-off valve, with purging bottle, rear closedown sonic nozzle pneumatic on-off valve is purged to whole pipeline, close flow control valve, close main line valve;
Open main line valve, open flow control valve, close sonic nozzle pneumatic on-off valve with after hydrogen purge pipeline, close flow control valve, close main line valve;
Open main line valve, open flow control valve, by reduction valve, stagnation container pressure is remained on more than 0.3Mpa with hydrogen;
Wait for that line-pressure sensor is consistent with stagnation container pressure, when measured stream gauge reading is 0, open sonic nozzle pneumatic on-off valve;
Measure hydrogen flowing quantity after flowmeter numerical stability, obtain measurement result.
8. method according to claim 7, is characterized in that, the calculating formula that described sonic nozzle measures hydrogen quality flow is:
In formula:
Q
m---mass rate kg/s;
A
*---nozzle throat area of section m
2;
C---efflux coefficient;
C
*---actual gas critical flow;
P
0---the absolute stagnation pressure Pa of nozzle entrance place gas;
R---universal gas constant J/ (kmolK);
The molal weight kg/kmol of M---gas;
T
0---the absolute stagnation temperature K of gas;
A
*---determined by processing result or obtain through measuring.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310629907.XA CN104677439A (en) | 2013-11-29 | 2013-11-29 | Hydrogen gas flow rate detecting system and hydrogen gas flow rate detecting system |
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|---|---|---|---|
| CN201310629907.XA CN104677439A (en) | 2013-11-29 | 2013-11-29 | Hydrogen gas flow rate detecting system and hydrogen gas flow rate detecting system |
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| CN104677439A true CN104677439A (en) | 2015-06-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116335818A (en) * | 2023-01-02 | 2023-06-27 | 重庆长安汽车股份有限公司 | Hydrogen engine nozzle flow measuring device and measuring method |
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2013
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| CN116335818A (en) * | 2023-01-02 | 2023-06-27 | 重庆长安汽车股份有限公司 | Hydrogen engine nozzle flow measuring device and measuring method |
| CN116335818B (en) * | 2023-01-02 | 2024-05-14 | 重庆长安汽车股份有限公司 | Hydrogen engine nozzle flow measuring device and measuring method |
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Application publication date: 20150603 |