CN108593247A - The method of available ventilation amount between four series connection rooms of measurement - Google Patents
The method of available ventilation amount between four series connection rooms of measurement Download PDFInfo
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- CN108593247A CN108593247A CN201810308762.6A CN201810308762A CN108593247A CN 108593247 A CN108593247 A CN 108593247A CN 201810308762 A CN201810308762 A CN 201810308762A CN 108593247 A CN108593247 A CN 108593247A
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- ventilation amount
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
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Abstract
The present invention relates to the method for available ventilation amount between a kind of four series connection rooms of measurement, step is：First, room one, room two, room three and room four are ganged up by three channels, the sum of the available ventilation amount of the available ventilation amount and room two and room three in room two and room one is obtained by the attenuation law of the search gas A concentration in room two；The attenuation law of the search gas A concentration in room three is recycled to obtain the difference of the available ventilation amount in room three and room two and the available ventilation amount in room three and room four；Then search gas B is discharged in room three, utilize the concentration decline rule of three search gas B of room, obtain the sum of the available ventilation amount of the available ventilation amount and room three and room four in room three and room two, by the simultaneous of above three accounting equation and three unknown numbers, to acquire the available ventilation amount between each adjacent room.The present invention can solve the realistic meaning of engineering actual demand, and the measurement for four or more multiple series connection ventilation of room amounts provides important evidence.
Description
Technical field
The present invention relates to a kind of methods measuring ventilation of room amount using trace gas concentration variation, and in particular to two
Kind different search gas is come the method that measures available ventilation amount between four series connection rooms.
Background technology
As people increasingly pay attention to ventilation of room amount, it is that comparison is normal to measure ventilation of room amount using search gas method
With and accurate method, in previous research, as determined the independent room of air conditioner ventilation using trace gas concentration method
Ventilation rate utilizes trace gas concentration using the inleakage outside the measure of the change mine air duct of trace gas concentration
The ventilation volume etc. of measure of the change showcase.And a kind of one individual ventilation of room of search gas measurement is mostly used in studying at present
Amount, and referred to for the measurement of available ventilation amount between more complicated series connection room is less, such as measured using search gas
Available ventilation amount between subway platform, subway concourse, outdoor and running tunnel, using search gas measure museum it is each series connection and
Available ventilation amount between adjacent exhibition room etc., in this case using a kind of search gas be then unable to measure out each room it
Between available ventilation amount.The side of available ventilation amount between four series connection rooms is measured using the variation of two kinds of trace gas concentrations
Method, the ventilation quantity for measuring complicated series connection room have conveniently advantage, to the assay method of ventilation of room amount
Expanding has important theory significance and engineering value.
Invention content
The purpose of the present invention is to provide it is a kind of using the variation of two kinds of trace gas concentrations come measure four series connection rooms it
Between available ventilation amount computational methods.
Technical solution provided by the invention is：A method of measuring available ventilation amount between four series connection rooms, step
Suddenly it is：First, room one, room two, room three and room four are ganged up by three channels, is divided in room two and room three
It is not passed through suitable search gas A and search gas B, room two is obtained by the attenuation law of the search gas A concentration in room two
With the sum of the available ventilation amount of the available ventilation amount and room two and room three in room one；Recycle the search gas A in room three
The attenuation law of concentration obtains the difference of the available ventilation amount in room three and room two and the available ventilation amount in room three and room four；
Then it discharges search gas B in room three and obtains room three and room using the concentration decline rule of three search gas B of room
Two available ventilation amount and room three and the sum of the available ventilation amount in room four are unknown by above three accounting equation and three
Several simultaneous, to acquire the available ventilation amount Q between each adjacent roomI, j。
Determine available ventilation amount Q between each adjacent roomI, jSpecific steps include：
Step 1：If the available ventilation amount between room 22 and room 1 is Q2,1m3/ s, room 2 are effective with room 3
Ventilation quantity is Q2,3m3The available ventilation amount in/s, room 33 and room 44 is Q3,4m3/ s discharges search gas A in room 22,
Such as SF6, according to expression formula Q=V (the ln C of trace gas concentration attenuation lawJust-ln CEnd)/t, wherein Q are ventilation quantity m3/s、V
For volume m3、CJustAnd CEndFor initial stage and latter stage trace gas concentration mg/m3, t be time h, it can be deduced that room 22 and room 1
Available ventilation amount Q2,1With the available ventilation amount Q in room 22 and room 332,3The sum of QA：
QA=Q2,1+Q2,3
Step 2：Having for room 22 and room 33 can be obtained by the concentration decline rule of 33 search gas A of room
Imitate ventilation quantity Q2,3With the available ventilation amount Q in room 33 and room 443,4Difference QB：
QB=Q2,3-Q3,4
Step 3：Search gas B, such as C are discharged in room 332H6, according to the concentration decline rule of 33 search gas B of room
It can obtain the available ventilation amount Q in room 33 and room 223,2With the available ventilation amount Q in room 33 and room 443,4The sum of
QC：
QC=Q3,2+Q3,4
Step 4：Simultaneous above three equation can solve the available ventilation amount between each adjacent room：
The trace gas concentration in series connection room influences each other between adjacent room, in the search gas A that room two discharges
It can spread to room one and to room three, and spread to room four in the search gas A in room three；Three search gas of room at this time
The concentration variation of A was not only related with the available ventilation amount in room four to room three, but also the available ventilation amount with room three and room two
It is related.
The search gas A and search gas B be the non-explosive for following mass conservation law, it is colourless it is nontoxic, be easy to expand
It dissipates, be easy to the gas being uniformly mixed with air.
Suitable search gas A and search gas B is each led into the room two and room three, while in two He of room
Placing the wind turbine of suitable number at room three respectively makes search gas be evenly distributed, search gas discharge to be uniformly mixed this
In period, it should ensure that the available ventilation amount in room two and room three is zero, make each room again after search gas is evenly distributed
Between divulge information, then with gas concentration instrument and flame ionization gas chromatographicanalyzer is measured, measure two kinds at regular intervals and show
Track gas concentration simultaneously records.
Measuring point is arranged in room two and room three, when measuring the concentration of search gas, survey according to the principle being evenly arranged
The trace gas concentration of each measuring point is measured, the concentration feature that can represent room is then averaged.
The beneficial effects of the invention are as follows：
The method of the present invention has to measure between four rooms by three Tandems using two kinds of different search gas
Ventilation quantity is imitated, it is extremely convenient and accurate for the ventilation quantity for measuring complicated series connection room, so that trace gas concentration method is being measured
Independent room, single search gas are no longer limited to when ventilation of room amount, to the method using search gas measurement ventilation quantity
Application range has theory significance and engineering value, solves the realistic meaning of engineering actual demand, is four or more multiple strings
The measurement for joining ventilation of room amount provides important evidence.
Description of the drawings
Fig. 1 is the schematic diagram of available ventilation amount between measuring four series connection rooms.
Specific implementation mode
Technical scheme of the present invention is described in further detail with reference to embodiment.
As shown in Figure 1, the present invention's measures available ventilation between four series connection rooms using two kinds of different search gas
The method of amount, step are：First, room one, room two, room three and room four are ganged up by three channels, in room
Two and room three in each lead into suitable search gas A and search gas B, by the decaying of the search gas A concentration in room two
Rule obtains the sum of the available ventilation amount of the available ventilation amount and room two and room three in room two and room one；Recycle room
The attenuation law of three search gas A concentration obtains the available ventilation amount in room three and room two and having for room three and room four
Imitate the difference of ventilation quantity；Then search gas B is discharged in room three to obtain using the concentration decline rule of three search gas B of room
The sum of the available ventilation amount in room three and the available ventilation amount and room three and room four in room two, passes through above three calculating side
The simultaneous of journey and three unknown numbers, to acquire the available ventilation amount Q between each adjacent roomI, j。
Present invention determine that available ventilation amount Q between each adjacent roomI, jSpecific steps include：
Step 1：If the available ventilation amount between room 22 and room 1 is Q2,1m3/ s, room 22 and room 33
Available ventilation amount is Q2,3m3The available ventilation amount in/s, room 3 and room 4 is Q3,4m3/ s discharges search gas A in room 22,
Such as SF6, according to expression formula Q=V (the ln C of trace gas concentration attenuation lawJust-ln CEnd(wherein Q is ventilation quantity m to)/t3/s、V
For volume m3、cJustAnd cEndFor initial stage and latter stage trace gas concentration mg/m3, t be time h), it can be deduced that room 22 and room one
1 available ventilation amount Q2,1With the available ventilation amount Q in room 22 and room 332,3The sum of QA：
QA=Q2,1+Q2,3
Step 2：It can show that room 2 leads to the effective of room 3 by the concentration decline rule of 33 search gas A of room
Air quantity Q2,3With the available ventilation amount Q in room 33 and room 443,4Difference QB：
QB=Q2,3-Q3,4
Step 3：Search gas B, such as C are discharged in room 332H6, can according to the concentration decline rule of 3 search gas B of room
To obtain the available ventilation amount Q in room 33 and room 223,2With the available ventilation amount Q in room 33 and room 443,4The sum of QC：
QC=Q3,2+Q3,4
Step 4：Simultaneous above three equation can solve the available ventilation amount between each adjacent room：
The trace gas concentration in series connection room influences each other between adjacent room, in the search gas A that room two discharges
It can spread to room one and to room three, and spread to room four in the search gas A in room three；Three search gas of room at this time
The concentration variation of A was not only related with the available ventilation amount in room four to room three, but also the available ventilation amount with room three and room two
It is related.
Search gas A and search gas B, which is used, all follows mass conservation law, non-explosive, without each room in special circumstances
Interior emission is always 0, and harmless in the scope of application and dosage is few, can be at low concentrations with different instrument point
It not detected；In addition more stable under room temperature, colourless nontoxic, relative molecular mass is smaller, is easy to spread, and is easy to mixed with air
It closes uniform.
Suitable search gas A and search gas B are each led into room two and room three simultaneously, in room two and room
Placing the wind turbine of suitable number at three respectively makes search gas be evenly distributed, and is discharged to this uniformly mixed time in search gas
It in section, should ensure that the available ventilation amount in room two and room three is zero, make each room logical again after search gas is evenly distributed
Wind measures two kinds of tracer gas at regular intervals then with gas concentration instrument and flame ionization gas chromatographicanalyzer is measured
Bulk concentration simultaneously records.
Measuring point is arranged in room two and room three, when measuring the concentration of search gas, survey according to the principle being evenly arranged
The trace gas concentration of each measuring point is measured, the concentration feature that can represent room is then averaged.
Embodiment：Outside certain subway station room, between station hall layer, station layer and running tunnel each available ventilation amount calculating.
Certain subway station is the subway station of a standard.The station hall layer is connected by entrance with outdoor, and station hall layer passes through upper
It goes downstairs and is connected with station layer, station layer is connected with running tunnel.Wherein station hall layer volume is 3000m3, station layer volume is
4500m3.Meet and is measured with the available ventilation amount between three Tandems, four rooms using two kinds of different search gas
Computational methods.
Utilize the measured data on the same day, i.e. station hall layer SF6Concentration decline, from C0=0.78mg/m3To C1=0.696mg/
m3, time 1.5h.According to expression formula Q=V (the ln C of trace gas concentration attenuation lawJust-In CEnd)/t, it can be deduced that stand
Room layer and outdoor available ventilation amount Q2,1With the available ventilation amount Q of station hall layer and station layer2,3The sum of QA：
QA=Q2,1+Q2,3=228m3/h
Step 2：Pass through station layer search gas SF6Concentration variation, from C2=0.22mg/m3To C3=0.23mg/m3, when
Between be 2h.It can obtain the available ventilation amount Q of station hall layer and station layer2,3With the available ventilation amount Q of station layer and running tunnel3,4
Difference QB：
QB=Q2,3-Q3,4=56m3/h
Step 3：According to station layer search gas C2H6Concentration variation, from C4=0.76mg/m3To C5=0.71mg/m3,
Time is 1.5h.It can obtain the available ventilation amount Q of station layer and station hall layer3,2With the available ventilation of station layer and running tunnel
Measure Q3,4The sum of QC：
QC=Q3,2+Q3,4=169m3/h
Step 4：Simultaneous above three equation can solve the available ventilation amount between each adjacent interval：
Claims (6)
1. a kind of method measuring available ventilation amount between four series connection rooms, which is characterized in that its step is：First, by room
Between one, room two, room three and room four ganged up by three channels, each lead into suitable show in room two and room three
Track gas A and search gas B obtains the effective of room two and room one by the attenuation law of the search gas A concentration in room two
The sum of the available ventilation amount of ventilation quantity and room two and room three；Recycle the attenuation law of the search gas A concentration in room three
Obtain the difference of the available ventilation amount in room three and room two and the available ventilation amount in room three and room four；Then it is released in room three
Search gas B is put, using the concentration decline rule of three search gas B of room, obtains the available ventilation amount in room three and room two
With the sum of the available ventilation amount in room three and room four, by the simultaneous of above three accounting equation and three unknown numbers, to
Acquire the available ventilation amount Q between each adjacent roomI, j。
2. the method for available ventilation amount between four series connection rooms of measurement according to claim 1, it is characterised in that：It determines
Available ventilation amount Q between each adjacent roomI, jSpecific steps include：
Step 1：If the available ventilation amount between room 2 and room 1 is Q2,1m3/ s, room 2 and the available ventilation amount in room 3 are
Q2,3m3The available ventilation amount in/s, room 3 and room 4 is Q3,4m3/ s discharges search gas A, such as SF in room 26, according to tracer
Expression formula Q=V (the lnC of gas concentration attenuation lawJust-lnCEnd)/t, wherein Q are ventilation quantity m3/ s, V is volume m3、CJustAnd CEndFor
Initial stage and latter stage trace gas concentration mg/m3, t be time h, it can be deduced that the available ventilation amount Q in room 2 and room 12,1The room and
Between 2 with the available ventilation amount Q in room 32,3The sum of QA：
QA=Q2,1+Q2,3
Step 2：The available ventilation amount Q in room 2 and room 3 can be obtained by the concentration decline rule of 3 search gas A of room2,3
With the available ventilation amount Q in room 3 and room 43,4Difference QB：
QB=Q2,3-Q3,4
Step 3：Search gas B, such as C are discharged in room 32H6, can be obtained according to the concentration decline rule of 3 search gas B of room
The available ventilation amount Q in room 3 and room 23,2With the available ventilation amount Q in room 3 and room 43,4The sum of QC：
QC=Q3,2+Q3,4
Step 4：Simultaneous above three equation can solve the available ventilation amount between each adjacent room：
3. the method for available ventilation amount between four series connection rooms of measurement according to claim 1, it is characterised in that：Series connection
The trace gas concentration in room influences each other between adjacent room, in the search gas A that room two discharges to room one and meeting
It spreads to room three, and is spread to room four in the search gas A in room three；The concentration variation of three search gas A of room at this time
Not only related with the available ventilation amount in room four to room three but also related with the available ventilation amount in room two to room three.
4. the method for available ventilation amount between four series connection rooms of measurement according to claim 1, it is characterised in that：It is described
Search gas A and search gas B be the non-explosive for following mass conservation law, it is colourless it is nontoxic, be easy to spread, be easy to and air
Uniformly mixed gas.
5. the method for available ventilation amount between four series connection rooms of measurement according to claim 1, it is characterised in that：It is described
Suitable search gas A and search gas B are each led into room two and room three simultaneously, are distinguished at room two and room three
Placing the wind turbine of suitable number makes search gas be evenly distributed, and discharges to being uniformly mixed in this period, answers in search gas
Ensure that the available ventilation amount in room two and room three is zero, makes each ventilation of room again after search gas is evenly distributed, then
With gas concentration instrument and flame ionization gas chromatographicanalyzer is measured, two kinds of trace gas concentrations are measured simultaneously at regular intervals
Record.
6. the method for available ventilation amount between four series connection rooms of measurement according to claim 1, it is characterised in that：According to
The principle being evenly arranged arranges measuring point in room two and room three, when measuring the concentration of search gas, measures each measuring point
Then trace gas concentration is averaged the concentration feature that can represent room.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020192061A1 (en) * | 2019-03-28 | 2020-10-01 | 中国辐射防护研究院 | Method and system for measuring air exchange amount |
| CN114062002A (en) * | 2021-11-24 | 2022-02-18 | 北京工业大学 | Method for measuring dynamic ventilation volume of multiple areas of residential building |
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| WO2020192061A1 (en) * | 2019-03-28 | 2020-10-01 | 中国辐射防护研究院 | Method and system for measuring air exchange amount |
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