CN104111307A - Method for predicting attenuation of concentration of volatile organic compounds (VOCs) in new vehicle - Google Patents
Method for predicting attenuation of concentration of volatile organic compounds (VOCs) in new vehicle Download PDFInfo
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- CN104111307A CN104111307A CN201310137976.9A CN201310137976A CN104111307A CN 104111307 A CN104111307 A CN 104111307A CN 201310137976 A CN201310137976 A CN 201310137976A CN 104111307 A CN104111307 A CN 104111307A
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Abstract
A method for predicting attenuation of the concentration of volatile organic compounds (VOCs) in a new vehicle is disclosed. The method comprises: aiming at a production unloaded vehicle at a random time t1, performing concentration-value sampling and measuring on volatile organic compounds, so as to obtain a sampling measuring value c[t1], enabling C[t]=C[t1] and t=t1 and substituting into a formula c[t]=c[30]*e<-k1(t-30)> when t<=30 d or c[t] =c[30]*e<-k2(t-30)> when t>30 d, calculating out C[30] value, so as to calculate out the concentration value c[t] of volatile organic compounds (VOCs) in the new vehicle at a random unloading time t, and further to calculate out the natural attenuation status of volatile organic compounds (VOCs) in the new vehicle at a random unloading time. The method is capable of predicting how many days an automobile has relatively less harmful gases and is suitable for warehouse-out sale after leaving a factory, thereby avoiding complaints and disputes caused by too much pungent gas in the automobile, and optimizing the flows of production and delivery.
Description
Technical field
The present invention relates to the management and control of vehicle air quality, be specifically related to the decay Forecasting Methodology of volatile organic matter concentration (VOCs) in Automobile.
Background technology
Along with the issue of volatile organic matter in < < HJ/T400-2007 car and aldoketones material sampling determination method > > is implemented, and the soon appearance of the interior volatile organic matter of car and aldoketones material concentration limit value, people to the concern of in-vehicle air pollution thing oneself by: have which objectionable impurities, what the source of these objectionable impuritiess is, human body is had to great harm, need to be limited in how many values and with interior can acceptance by human body, not produce harm? transfer what the volatilization attenuation characteristic of these objectionable impuritiess of research in car be to, how to control and to reduce these objectionable impuritiess?
In car, VOCs derives from nonmetal interior material in car, but in car, the mode of distributing of interior material VOCs is various, has one side to distribute, as the inside gadget of being close to ceiling, side plate, floor etc. distributes, also there is two-sided distributing, as various fabrics distribute, much indirectly distribute in addition, as liner, foam etc.Therefore in car, distributing of VOCs is a kind of compound distributing, and is difficult to one based on mass transfer principle, and the Mass Transfer Model that physical significance is clearer and more definite is described.As classical Little model, although it has considered that VOCs is in the diffusion of material internal and the impact of environment ventilation, but supposed that ambient concentration and material boundary concentration are linear, ignored the impact in boundary layer, supposed that material surface concentration is zero, ignore environment to the impact of distributing, application has limitation.Or the universal emission model of Xu and Zhang proposition, it distributes mainly for flat building materials one side, does not possess comprehensive.
Summary of the invention
The present invention is intended to solve classical Little model, or the universal emission model that proposes of Xu and Zhang cannot describe the shortcoming of the compound emission characteristics of VOCs in Automobile, proposes the decay Forecasting Methodology of volatile organic matter concentration VOCs in a kind of new car car.
A decay Forecasting Methodology of volatile organic matter concentration VOCs in new car car, comprises the following steps:
Random time t1 is produced to the automobile that rolls off the production line, carry out volatile performance organic concentration value sampling determination, obtain sampling determination value c
t1
By by C
t=C
t1t=t
1substitution formula:
c
t=c
30×e
-k1(t-30) t≤30d
c
t=c
30×e
-k2(t-30) t>30d
Calculate C
30value, can calculate while rolling off the production line arbitrarily time t, volatile performance organic concentration value c in Automobile
t; The interior air V OCs Natural Attenuation situation of the time car that rolls off the production line arbitrarily after calculating;
In above formula:
T---the automobile production number of days d that rolls off the production line
C
t---automobile production VOCs concentration value t days time that rolls off the production line, the μ g/m of unit
3;
C
30---the automobile production VOCs concentration value 30 days time that rolls off the production line, the μ g/m of unit
3;
K
1=0.075-0.105; Preferably 0.09---automobile production roll off the production line 30 days before damped expoential, the d of unit
-1;
K
2=0.015-0.045; Preferably 0.03---automobile production roll off the production line 30 days after damped expoential, the d of unit
-1.
The present invention is by exponential fitting tracing analysis, set up VOCs emission model in Automobile, i.e. two computing formula, by automobile production is rolled off the production line to 7, 10, 15, 20, 30, 45, 60, 75, toluene in the interior air of car in the time of 90 days, dimethylbenzene, ethylbenzene is tested, as 1 being toluene measured data in Fig. 1, 2 is the toluene die-away curve going out through exponential fitting tracing analysis, in Fig. 2,1 is dimethylbenzene measured data, 2 for 1 being ethylbenzene measured data in the toluene die-away curve that goes out through exponential fitting tracing analysis and Fig. 3, 2 is the ethylbenzene die-away curve going out through exponential fitting tracing analysis, it is substantially accurate that actual retrieval data and this method propose formula fitting predicted data.Visible use the inventive method, after can projected vehicle dispatching from the factory, in vehicle car how many days, the less applicable outbound of harmful gas is sold, thereby avoids, due to the pungent excessive generation complaint of gas, dispute in car, having optimized production, delivery flow process.
Accompanying drawing explanation
Fig. 1: toluene measured data and exponential fitting curve comparison
1------toluene measured data
2------toluene exponential fitting curve
Fig. 2: dimethylbenzene measured data and exponential fitting curve comparison
1------dimethylbenzene measured data
2------dimethylbenzene exponential fitting curve
Fig. 3: ethylbenzene measured data and exponential fitting curve comparison
1------ethylbenzene measured data
2------ethylbenzene exponential fitting curve
Embodiment
Below further illustrate the content of this method:
Embodiment 1:
By production time t≤30 of rolling off the production line, as t
1=7(d) automobile, by volatile organic matter in < < HJ/T400-2007 car and aldoketones material sampling determination method > >, carry out volatile performance organic concentration value sampling determination, measuring xylene concentration is c
7=3852 μ g/m
3
By c
t=c
t1=c
7=3852, t=t
1=7 substitution formula
c
t=c
30×e
-k1(t-30) t≤30
Can calculate C
30value:
c
30=c
t×e
k1(t-30)
=c
t1×e
k1(t1-30)
=3852×e
0.09×(7-30)
=396μg/m
3
Need the calculating time of rolling off the production line to be less than or equal to 30 days, during as t=20 days, xylene concentration C in Automobile
20by its substitution formula:
c
t=c
30×e
-k1(t-30) t≤30
That is:
c
20=c
30×e
-k1(20-30)
=415×e
0.9
=1020μg/m
3
Need the calculating time of rolling off the production line to be greater than 30 days, during as t=90 days, xylene concentration C in Automobile
50by its substitution formula:
c
t=c
30×e
-k2(t-30) t>30
That is:
c
90=c
30×e
-k2(90-30)
=415×e
-0.03×(90-30)
=68μg/m
3
As can be seen here, can calculate any production while rolling off the production line time t, xylene concentration C in car
t
Embodiment 2:
By the production time t>30 days that rolls off the production line, as t
1=50(d) automobile, by volatile organic matter in < < HJ/T400-2007 car and aldoketones material sampling determination method > >, carry out volatile performance organic concentration value sampling determination, measuring xylene concentration is c
50=205 μ g/m
3
By c
t=c
t1=c
50=205, t=t
1=50 substitution formula
c
t=c
30×e
-k2(t-30) t>30d
Can calculate C
30value:
c
30=c
t×e
k2(t-30)
=c
t1×e
k2(t1-30)
=205×e
0.03×(50-30)
=373μg/m
3
Equally, can calculate any production while rolling off the production line time t, xylene concentration C in car
tby the application of this method, no matter how long the automobile production time of rolling off the production line has, can be by current vehicle air VOCs be tested, air V OCs concentration value in car when calculating a certain production and rolling off the production line the time, and can calculate the interior air V OCs Natural Attenuation situation of later time car.Can help autoist to understand vehicle air VOCs quality; Also can help the control of auto producer to vehicle air VOCs, as automobile is carried out to artificial attenuation processing: heating, ventilation, spray decay liquid etc., by this patent, apply, can assess the effect of artificial attenuation.
Claims (2)
1. a decay Forecasting Methodology of volatile organic matter concentration VOCs in new car car, comprises the following steps:
By random time t
1the production automobile that rolls off the production line, carries out volatile performance organic concentration value sampling determination, obtains sampling determination value c
t1
By by C
t=C
t1t=t
1substitution formula:
c
t=c
30×e
-k1(t-30) t≤30
c
t=c
30×e
-k2(t-30) t>30
Calculate C
30value, can calculate while rolling off the production line arbitrarily time t, volatile performance organic concentration value c in Automobile
t; The interior air V OCs Natural Attenuation situation of the time car that rolls off the production line arbitrarily after calculating;
In above formula:
T---the automobile production number of days that rolls off the production line, the d of unit
C
t---automobile production VOCs concentration value t days time that rolls off the production line, the μ g/m of unit
3;
C
30---the automobile production VOCs concentration value 30 days time that rolls off the production line, the μ g/m of unit
3;
K
1=0.075-0.105; Preferably 0.09---automobile production roll off the production line 30 days before damped expoential, the d of unit
-1;
K
2=0.015-0.045; Preferably 0.03---automobile production roll off the production line 30 days after damped expoential, the d of unit
-1.
2. the decay Forecasting Methodology of volatile organic matter concentration VOCs in new car car according to claim 1, is characterized in that: k
1preferably 0.09, k
2preferably 0.03.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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|---|---|---|---|
| CN201310137976.9A CN104111307B (en) | 2013-04-19 | 2013-04-19 | The decay Forecasting Methodology of volatile organic matter concentration VOCs in a kind of new car car |
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| Publication Number | Publication Date |
|---|---|
| CN104111307A true CN104111307A (en) | 2014-10-22 |
| CN104111307B CN104111307B (en) | 2016-02-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111461483A (en) * | 2020-02-27 | 2020-07-28 | 中汽数据有限公司 | Evaluation method for VOCs treatment facility in automobile manufacturing industry |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102012417A (en) * | 2010-04-07 | 2011-04-13 | 东莞市升微机电设备科技有限公司 | Test room for volatile organic matters of complete automobile |
| CN102565288A (en) * | 2012-01-05 | 2012-07-11 | 天津通广集团数字通信有限公司 | Method for analyzing component concentration of mixed volatile organic compounds (VOCs) |
-
2013
- 2013-04-19 CN CN201310137976.9A patent/CN104111307B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102012417A (en) * | 2010-04-07 | 2011-04-13 | 东莞市升微机电设备科技有限公司 | Test room for volatile organic matters of complete automobile |
| CN102565288A (en) * | 2012-01-05 | 2012-07-11 | 天津通广集团数字通信有限公司 | Method for analyzing component concentration of mixed volatile organic compounds (VOCs) |
Non-Patent Citations (2)
| Title |
|---|
| 秦华鹏等: "人造板甲醛释放影响因素的环境箱试验与模型研究", 《中国环境科学》 * |
| 秦华鹏等: "室内环境中挥发性有机物释放过程的数学模型", 《环境污染与防治》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111461483A (en) * | 2020-02-27 | 2020-07-28 | 中汽数据有限公司 | Evaluation method for VOCs treatment facility in automobile manufacturing industry |
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|---|---|
| CN104111307B (en) | 2016-02-03 |
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