CN104111307B - The decay Forecasting Methodology of volatile organic matter concentration VOCs in a kind of new car car - Google Patents
The decay Forecasting Methodology of volatile organic matter concentration VOCs in a kind of new car car Download PDFInfo
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- CN104111307B CN104111307B CN201310137976.9A CN201310137976A CN104111307B CN 104111307 B CN104111307 B CN 104111307B CN 201310137976 A CN201310137976 A CN 201310137976A CN 104111307 B CN104111307 B CN 104111307B
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Abstract
A decay Forecasting Methodology of volatile organic matter concentration VOCs in new car car, described method is by random time t
1production is rolled off the production line automobile, carries out volatile performance organic concentration value sampling determination, obtains sampling determination value c
t1by by C
t=C
t1t=t
1substitute into formula: c
t=c
30× e
-k1 (t-30)t≤30d; c
t=c
30× e
-k2 (t-30)t > 30d calculates C
30value, when can calculate any downtime t, volatile performance organic concentration value c in Automobile
t; Namely air V OCs Natural Attenuation situation in any downtime car after calculating.This method can projected vehicle dispatch from the factory after in how many days vehicle car the less applicable outbound of harmful gas sell, thus avoid due to excessive generations of pungent gas in car complain, dispute, optimize production, flow process of delivering.
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 " in HJ/T400-2007 car volatile organic matter and aldoketones material sampling determination method " is implemented, and in car volatile organic matter and aldoketones material concentration limit value be about to put into effect, people to the concern of in-vehicle air pollution thing oneself by: have which objectionable impurities, what the source of these objectionable impuritiess be, human body had to great harm, need to be limited in how many values within can be accepted by human body and do not produce harm? transfer the volatilization attenuation characteristic of these objectionable impuritiess of research in car to what to be, 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, inside gadget as being close to ceiling, side plate, floor etc. distributes, and also has two-sided distributing, as various fabric distributes, much indirectly distribute, as liner, foam etc. in addition.Therefore in car, distributing of VOCs is that a kind of compound is distributed, and be difficult to one based on mass transfer principle, the Mass Transfer Model that physical significance is clearer and more definite describes.As the Little model of classics, although it considers the diffusion of VOCs at material internal and the impact of environment ventilation, but assume that ambient concentration and material boundary concentration linear, have ignored the impact in boundary layer, assume that material surface concentration is zero, namely ignore environment to the impact of distributing, application has limitation.Or the universal emission model that XuandZhang proposes, 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 of XuandZhang proposition cannot describe the shortcoming of VOCs compound emission characteristics 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 the automobile that rolls off the production line, carries out volatile performance organic concentration value sampling determination, obtain sampling determination value c
t1
By by C
t=C
t1t=t
1substitute into formula:
c
t=c
30×e
-k1(t-30)t≤30d
c
t=c
30×e
-k2(t-30)t>30d
Calculate C
30value, when can calculate any downtime t, volatile performance organic concentration value c in Automobile
t; Namely air V OCs Natural Attenuation situation in any downtime car after calculating;
In above formula:
T---automobile production is rolled off the production line number of days d
C
t---automobile production roll off the production line t days time VOCs concentration value, unit μ g/m
3;
C
30---automobile production roll off the production line 30 days time VOCs concentration value, unit μ g/m
3;
K
1=0.075-0.105; Preferably 0.09---automobile production roll off the production line 30 days before damped expoential, unit d
-1;
K
2=0.015-0.045; Preferably 0.03---automobile production roll off the production line 30 days after damped expoential, unit d
-1.
The present invention is by exponential fitting tracing analysis, establish VOCs emission model in Automobile, i.e. two computing formula, by rolling off the production line 7 to automobile production, 10, 15, 20, 30, 45, 60, 75, toluene in air in car when 90 days, dimethylbenzene, ethylbenzene is tested, as in Fig. 1,1 is toluene measured data, 2 is the toluene die-away curve gone 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 gone 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, can projected vehicle dispatch from the factory after in how many days vehicle car the less applicable outbound of harmful gas sell, thus avoid due to excessive generations of pungent gas in car complain, dispute, optimize production, flow process of delivering.
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:
Downtime t≤30 will be produced, as t
1=7(d) automobile, carry out volatile performance organic concentration value sampling determination by " in HJ/T400-2007 car volatile organic matter and aldoketones material sampling determination method ", measuring xylene concentration is c
7=3852 μ g/m
3
By c
t=c
t1=c
7=3852, t=t
1=7 substitute into formula
c
t=c
30×e
-k1(t-30)t≤30
C can be calculated
30value:
c
30=c
t×e
k1(t-30)
=c
t1×e
k1(t1-30)
=3852×e
0.09×(7-30)
=396μg/m
3
Downtime need be calculated and be less than or equal to 30 days, during as t=20 days, xylene concentration C in Automobile
20then substituted into 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
Downtime need be calculated and be greater than 30 days, during as t=90 days, xylene concentration C in Automobile
50then substituted into 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, when can calculate any production downtime t, xylene concentration C in car
t
Embodiment 2:
Downtime t>30 days will be produced, as t
1=50(d) automobile, carry out volatile performance organic concentration value sampling determination by " in HJ/T400-2007 car volatile organic matter and aldoketones material sampling determination method ", measuring xylene concentration is c
50=205 μ g/m
3
By c
t=c
t1=c
50=205, t=t
1=50 substitute into formula
c
t=c
30×e
-k2(t-30)t>30d
C can be calculated
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, when can calculate any production downtime t, xylene concentration C in car
tby the application of this method, no matter how long automobile production downtime has, can by test current vehicle air VOCs, air V OCs concentration value in car when calculating a certain production downtime, and air V OCs Natural Attenuation situation in later time car can be calculated.Autoist can be helped to understand vehicle air VOCs quality; Also auto producer can be helped the control of vehicle air VOCs, as automobile is carried out artificial attenuation process: heating, ventilation, spray decay liquid etc., be applied by this patent, the effect of artificial attenuation can be assessed.
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
1production is rolled off the production line automobile, carries out volatile organic matter concentration value sampling determination, obtains sampling determination value c
t1;
By by C
t=C
t1, t=t
1substitute into formula:
c
t＝c
30×e
-k1(t-30)t≤30
c
t＝c
30×e
-k2(t-30)t>30
Calculate C
30value, when can calculate any downtime t, volatile organic matter concentration value c in Automobile
t;namely air V OCs Natural Attenuation situation in any downtime car after calculating;
In above formula:
T---automobile production is rolled off the production line number of days, unit d;
C
t---automobile production roll off the production line t days time VOCs concentration value, unit μ g/m
3;
C
30---automobile production roll off the production line 30 days time VOCs concentration value, unit μ g/m
3;
K
1=0.075-0.105---automobile production roll off the production line 30 days before damped expoential, unit d
-1;
K
2=0.015-0.045---automobile production roll off the production line 30 days after damped expoential, unit d
-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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| 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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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 |
|---|
| 人造板甲醛释放影响因素的环境箱试验与模型研究;秦华鹏等;《中国环境科学》;20090815;第29卷(第8期);第801-805页 * |
| 室内环境中挥发性有机物释放过程的数学模型;秦华鹏等;《环境污染与防治》;20060228;第28卷(第2期);第96-99页 * |
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