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A method for evaluating the hazards of particulate matter emissions from diesel engines

An evaluation method and technology of particulate matter, applied in computer parts, computer-aided medical procedures, instruments, etc.

Active Publication Date: 2019-10-11
CHANGSHU INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, this method does not consider the harm of diesel engine particulate matter emissions from the particle size distribution and particle number concentration of the particulate matter to the human body.

Method used

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  • A method for evaluating the hazards of particulate matter emissions from diesel engines
  • A method for evaluating the hazards of particulate matter emissions from diesel engines
  • A method for evaluating the hazards of particulate matter emissions from diesel engines

Examples

Experimental program
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Embodiment 1

[0046] Embodiment 1: the index that proposes criterion layer is now: respiratory system and immune system; The index of program layer is: PM 10 , PM 2.5 and PM 0.1 , to establish a criterion judgment matrix: Scheme judgment matrix: Each judgment matrix is ​​a combined judgment matrix (obtained by geometric mean) after several expert judgments. Calculate the largest eigenvalues ​​and corresponding eigenvectors of the three judgment matrices respectively: 2.000, 3.087, 3.036; (0.250 0.750) T ,(0.0960.284 0.619) T ,(0.106 0.634 0.261) T . check its consistency All ≤0.10. PM can be obtained 10 , PM 2.5 and PM 0.1 The weight values ​​for human hazards are: 0.103, 0.545, 0.351. PM emissions from 3 diesel engines A, B and C have been measured 10 , PM 2.5 and PM 0.1 The particle number concentration is: 85 · cm -3 , 231 cm -3 , 684 cm -3 ; 106 pcs cm -3 , 224 cm -3 , 670 cm -3 and 97 cm -3 , 203 cm -3 , 700 pcs.cm -3 . Then the analysis index of the princip...

Embodiment 2

[0047] Embodiment 2: the index that proposes criterion layer is now: respiratory system, immune system and nervous system; The index of scheme layer is: PM 10 , PM 2.5 and PM 0.1 , to establish a criterion judgment matrix: Scheme judgment matrix: Calculate the largest eigenvalues ​​of the four judgment matrices: 3.009, 3.081, 3.054, 3.029; and the eigenvectors corresponding to the four largest eigenvalues: (0.164 0.297 0.539) T , (0.057 0.6490.295) T , (0.525 0.334 0.142) T , (0.071 0.180 0.748) T . check its consistency All ≤0.10. PM can be obtained 10 , PM 2.5 and PM 0.1 The weight values ​​for human hazards are: 0.204, 0.303, 0.493. PM emissions from diesel engines A, B and C have been measured 10 , PM 2.5 and PM 0.1 The particle number concentration is: 69·cm -3 , 315 cm -3 , 758 cm -3 ; 109 pcs cm -3 , 258 cm -3 , 684 cm -3 ;87 cm -3 , 294 cm -3 , 712 cm -3 . Then the analysis index of the principal component analysis model is the product of ...

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Abstract

The invention discloses a method for evaluating the hazards of diesel engine particle emissions, which comprises the following steps: selecting different evaluation indexes of particle hazards, establishing a hierarchical structure model, constructing a judgment matrix and calculating weight values ​​according to expert knowledge, constructing a principal component analysis model and establishing Correlation coefficient matrix, using the correlation coefficient matrix to calculate the eigenvalue and principal component contribution, and determine the principal component, obtain the principal component load and expression, and establish the comprehensive scoring function H of the particulate matter emission hazard. Through the comprehensive scoring function H, this method considers the harm caused by particles of different particle sizes to different systems of the human body from a medical point of view.

Description

technical field [0001] The invention relates to a method for evaluating emission hazards, in particular to a method for evaluating the emission hazards of diesel engine particulate matter. Background technique [0002] Air pollution is one of the primary risk factors affecting health. According to the provisions of GB3095-2012 "Ambient Air Quality Standards" implemented on January 1, 2016, particulate matter PM 10 and PM 2.5 The average 24-hour primary limit concentration is 50 μg / m 3 , 35μg / m 3 . Studies have shown that diesel engine particulate emissions are about 500mg / km, gasoline engines are about 10mg / km, and diesel engines are 50 times higher than gasoline engines. Diesel engine particulate emissions are one of the main sources of urban air pollution. PM 2.5 The harm to the human body is significantly higher than that of coarse particulate matter PM 10 , ultrafine particulate matter PM with smaller particle size 0.1 greater threat to health. According to the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G16H50/30G06K9/62G06Q50/26
CPCG06Q50/26G16Z99/00G06F2219/10G06F18/2135
Inventor 高鉴许广举陈庆樟
Owner CHANGSHU INSTITUTE OF TECHNOLOGY
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