Investigation on the Time Factor of CO-Based Emission Factors for Sustainable Development of Urban Tunnels in China
Environmental pollution problems and energy-saving issues of urban tunnels have increasingly been attracting people’s attention. The paper aims at investigating a reasonable time factor for CO-based emission factors in the ventilation design of urban road tunnels. The study results show that the pre...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/8843943 |
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| _version_ | 1832550476295438336 |
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| author | Weiwei Liu Jianxun Chen Yanbin Luo Zhou Shi Yunfei Wu Zilong Xu Fangfang Dong |
| author_facet | Weiwei Liu Jianxun Chen Yanbin Luo Zhou Shi Yunfei Wu Zilong Xu Fangfang Dong |
| author_sort | Weiwei Liu |
| collection | DOAJ |
| description | Environmental pollution problems and energy-saving issues of urban tunnels have increasingly been attracting people’s attention. The paper aims at investigating a reasonable time factor for CO-based emission factors in the ventilation design of urban road tunnels. The study results show that the prediction curve of CO-based emission factor for passenger cars consists of two stages. The average reduction rates of Stage I (2004–2010) and Stage II (2010–2030) are 38% and 14% per year, respectively. The CO emission factor series of passenger cars conforms to exponential function distribution. The time factors of CO-based emission backcalculated from the measured data range from 4.9% to 12.6%, which are 2.4–6.3 times the specified value in the Chinese ventilation specification but slightly smaller than predicted ones. Based on four aspects of predicted results, back analysis results, related references, and engineering applications, it is indicated that the time factor of CO-based emission factor (2%) in the current ventilation specification is conservative. And when defining 2000 and 2010 as base years, respectively, 4% and 3% can be used as the time factors of CO-based emission factors respectively for the ventilation design of urban tunnels. This study can provide a reference for ventilation design of urban tunnels in other regions. |
| format | Article |
| id | doaj-art-338719866ea24ef2bd622a8996852ab9 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-338719866ea24ef2bd622a8996852ab92025-02-03T06:06:32ZengWileyAdvances in Civil Engineering1687-80861687-80942020-01-01202010.1155/2020/88439438843943Investigation on the Time Factor of CO-Based Emission Factors for Sustainable Development of Urban Tunnels in ChinaWeiwei Liu0Jianxun Chen1Yanbin Luo2Zhou Shi3Yunfei Wu4Zilong Xu5Fangfang Dong6School of Highway, Chang’an University, Xi’an 710064, Shaanxi, ChinaSchool of Highway, Chang’an University, Xi’an 710064, Shaanxi, ChinaSchool of Highway, Chang’an University, Xi’an 710064, Shaanxi, ChinaSchool of Highway, Chang’an University, Xi’an 710064, Shaanxi, ChinaSchool of Highway, Chang’an University, Xi’an 710064, Shaanxi, ChinaSchool of Highway, Chang’an University, Xi’an 710064, Shaanxi, ChinaSchool of Highway, Chang’an University, Xi’an 710064, Shaanxi, ChinaEnvironmental pollution problems and energy-saving issues of urban tunnels have increasingly been attracting people’s attention. The paper aims at investigating a reasonable time factor for CO-based emission factors in the ventilation design of urban road tunnels. The study results show that the prediction curve of CO-based emission factor for passenger cars consists of two stages. The average reduction rates of Stage I (2004–2010) and Stage II (2010–2030) are 38% and 14% per year, respectively. The CO emission factor series of passenger cars conforms to exponential function distribution. The time factors of CO-based emission backcalculated from the measured data range from 4.9% to 12.6%, which are 2.4–6.3 times the specified value in the Chinese ventilation specification but slightly smaller than predicted ones. Based on four aspects of predicted results, back analysis results, related references, and engineering applications, it is indicated that the time factor of CO-based emission factor (2%) in the current ventilation specification is conservative. And when defining 2000 and 2010 as base years, respectively, 4% and 3% can be used as the time factors of CO-based emission factors respectively for the ventilation design of urban tunnels. This study can provide a reference for ventilation design of urban tunnels in other regions.http://dx.doi.org/10.1155/2020/8843943 |
| spellingShingle | Weiwei Liu Jianxun Chen Yanbin Luo Zhou Shi Yunfei Wu Zilong Xu Fangfang Dong Investigation on the Time Factor of CO-Based Emission Factors for Sustainable Development of Urban Tunnels in China Advances in Civil Engineering |
| title | Investigation on the Time Factor of CO-Based Emission Factors for Sustainable Development of Urban Tunnels in China |
| title_full | Investigation on the Time Factor of CO-Based Emission Factors for Sustainable Development of Urban Tunnels in China |
| title_fullStr | Investigation on the Time Factor of CO-Based Emission Factors for Sustainable Development of Urban Tunnels in China |
| title_full_unstemmed | Investigation on the Time Factor of CO-Based Emission Factors for Sustainable Development of Urban Tunnels in China |
| title_short | Investigation on the Time Factor of CO-Based Emission Factors for Sustainable Development of Urban Tunnels in China |
| title_sort | investigation on the time factor of co based emission factors for sustainable development of urban tunnels in china |
| url | http://dx.doi.org/10.1155/2020/8843943 |
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