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Motor vehicle emission factor calculation method based on urban tunnel

A technology of emission factor and calculation method, which is applied in the direction of calculation, complex mathematical operations, instruments, etc., can solve the problem of motor vehicle emission, such as the difficulty in obtaining the emission factor of motor vehicles, and achieve the effect of obtaining

Pending Publication Date: 2020-05-08
JINAN UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the technical defects that the existing methods for obtaining the emission factors of motor vehicles cannot reflect the emission conditions of motor vehicles in the city where the tunnel is located under real conditions and it is difficult to obtain the emission factors of motor vehicles by vehicle type, the present invention provides a method for obtaining emission factors of motor vehicles based on urban tunnels. factor calculation method

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  • Motor vehicle emission factor calculation method based on urban tunnel
  • Motor vehicle emission factor calculation method based on urban tunnel
  • Motor vehicle emission factor calculation method based on urban tunnel

Examples

Experimental program
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Effect test

Embodiment 1

[0063] Such as figure 1 As shown, the calculation method of motor vehicle emission factors based on urban tunnels includes the following steps:

[0064] S1: Use real-time automatic online monitoring equipment to monitor pollutants, weather and tunnel traffic volume in a certain urban traffic tunnel, and obtain tunnel basic monitoring data;

[0065] S2: Obtain the basic parameter data of the tunnel;

[0066] S3: Preprocessing the tunnel foundation monitoring data and tunnel foundation parameter data;

[0067] S4: Obtain the basic motor vehicle emission factor data of the city in the past two years, and eliminate the outliers in the tunnel basic monitoring data and tunnel basic parameter data after preprocessing;

[0068] S5: Acquire preset vehicle models according to the basic emission factor data of motor vehicles;

[0069] S6: According to the preprocessed tunnel foundation monitoring data and tunnel foundation parameter data, complete the calculation of emission factors b...

Embodiment 2

[0086] More specifically, on the basis of Example 1, such as figure 2 As shown, the step S6 specifically includes the following steps:

[0087] S61: Calculate the monitoring average emission factor according to the preprocessed tunnel foundation monitoring data and tunnel foundation parameter data, the specific expression is:

[0088]

[0089] Among them, EF t To monitor the average emission factor [g·(km·vehicle) -1 ]; ΔC is the difference of pollutant concentration between monitoring points (mg m -3 ); A is the average cross-sectional area of ​​the tunnel mouth (m 2 ); u is the tunnel average wind speed (m·s -1 ); N is the total traffic volume passing through the tunnel during the sampling period (vehicle s -1 ); L is the distance between two sampling points in the tunnel (m);

[0090] S62: Calculate the simulated average emission factor with the help of the basic emission factor data of motor vehicles and the second-class traffic flow data, the specific expression...

Embodiment 3

[0110] More specifically, on the basis of Embodiment 1 and Embodiment 2, the emission factor calculation method provided by the embodiment of the present invention is further described by taking Guangzhou City as an example.

[0111] In this embodiment, from October 26 to November 1, 2012, real-time automatic online monitoring equipment was used to monitor the pollutants, weather and tunnel traffic volume of the Pearl River Tunnel in Guangzhou City. The automatic online monitoring was placed at the entrance and exit of the tunnel, and the main monitoring Objects: pollutant concentration at the entrance and exit (mainly NOx, CO), wind speed, temperature, pressure, and traffic flow. The monitoring equipment produces data every five minutes and monitors 24 hours a day.

[0112] Obtain the basic motor vehicle emission factor data of the city in similar years. The basic motor vehicle emission factor data is shown in the following table (unit: g·(km·vehicle) -1 ):

[0113] Motor V...

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Abstract

The invention provides a motor vehicle emission factor calculation method based on an urban tunnel, and the method comprises the steps: monitoring pollutants, weather and tunnel traffic volume of a certain urban traffic tunnel through employing real-time automatic online monitoring equipment, and obtaining tunnel basic monitoring data; acquiring tunnel basic parameter data; preprocessing the basicmonitoring data and the basic parameter data; acquiring motor vehicle basic emission factor data of cities in recent two years to eliminate abnormal values of basic parameter data; obtaining a presetvehicle model according to the basic emission factor data of motor vehicles; and according to the preprocessed tunnel basic monitoring data and tunnel basic parameter data, completing emission factor calculation of different vehicle types. According to the motor vehicle emission factor calculation method provided by the invention, the emission factor is calculated by using the basic data monitored by the tunnel, the motor vehicle emission condition of the city where the tunnel is located under the real condition is fully reflected, and meanwhile, the abnormal value of the tunnel basic data is eliminated, so that the motor vehicle emission factors of different vehicle types are obtained.

Description

technical field [0001] The invention relates to the technical field of motor vehicle environmental protection, and more specifically, relates to a calculation method for motor vehicle emission factors based on urban tunnels. Background technique [0002] In today's era, air pollution is a widespread concern in most cities in China. In source allocation studies, road transport is often regarded as one of the most important sources of urban pollutant emissions. Road transport is likely to remain a major contributor to air pollution in the coming decades, especially in urban areas. Therefore, great efforts are being made to reduce pollution emissions from road transport. These include improvements in motor vehicle technology, improvements in fuel, optimization of urban traffic management, and the implementation of stricter emission standards. [0003] In the existing methods of establishing motor vehicle emission inventories, relevant researchers generally calculate the moto...

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Application Information

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IPC IPC(8): G06F17/18G06Q50/26
CPCG06F17/18G06Q50/26
Inventor 黄青柴源
Owner JINAN UNIVERSITY