Article(id=1240689597777244890, tenantId=1146029695717560320, journalId=1234093305789726721, issueId=1240689590315569990, articleNumber=null, orderNo=null, doi=null, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1725206400000, receivedDateStr=2024-09-02, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1773733051007, onlineDateStr=2026-03-17, pubDate=1739980800000, pubDateStr=2025-02-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1773733051007, onlineIssueDateStr=2026-03-17, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1773733051007, creator=13701087609, updateTime=1773733051007, updator=13701087609, issue=Issue{id=1240689590315569990, tenantId=1146029695717560320, journalId=1234093305789726721, year='2025', volume='45', issue='2', pageStart='593', pageEnd='1184', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1773733049228, creator=13701087609, updateTime=1773733150042, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1240690013239825123, tenantId=1146029695717560320, journalId=1234093305789726721, issueId=1240689590315569990, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1240690013239825124, tenantId=1146029695717560320, journalId=1234093305789726721, issueId=1240689590315569990, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=648, endPage=656, ext={EN=ArticleExt(id=1240689598490276585, articleId=1240689597777244890, tenantId=1146029695717560320, journalId=1234093305789726721, language=EN, title=Calculation methods and characteristics of temporal and spatial distribution of airport air pollutant emissions, columnId=1234106386020365051, journalTitle=China Environmental Science, columnName=Air Pollution Control, runingTitle=null, highlight=null, articleAbstract=

A case study was conducted at Tianjin Airport by the research team, in which the predicted emissions using default parameters (recommended values) were compared with the results based on inputs that had been adjusted to real-world airport operations. A high spatial resolution (45m×45m) emission inventory was established in the airfield area to identify emission hotspots, and the results indicated that the daily emissions generated by all mobile sources at the airport based on recommended values were 2,320.01kg (NOx), 12,919.90kg (CO), 199.36kg (SO2), 76.83kg (PM) and 635.92kg (HC). After adjustment of inputs based on real-world airport operations, the emissions results were 1,982.65kg (NOx), 722.25kg (CO), 157.27kg (SO2), 70.48kg (PM) and 86.38kg (HC). The time between 08:00 to 09:00 (the departure peak at the airport) was identified as the period when the maximum total emissions across time of day occurred. Results of the spatial analysis showed that the emission hotspots were predominantly distributed as follows: for NOx, near the end of the departure runway; for CO, the merging area of taxiways (which connect arriving and departing flights); for SO2 and PM, the aprons with a larger number of arriving and departing flights; and for HC, both the merging area of connecting taxiways and the aprons with a larger number of flights. The top 20% of emissions were primarily from: for NOx the take-off stage of aircraft; for CO, taxiing stage of aircraft; for SO2 and HC, the ground support equipment in the parking position during the service stage and taxiing stage of aircraft; and for PM, ground support equipment at parking lots and service lanes.

, correspAuthors=Chen-xu LI, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, authorCompany=null, fund=null, authors=null, authorsList=Chen-xu LI, Zi-yi WANG), CN=ArticleExt(id=1240689604530073763, articleId=1240689597777244890, tenantId=1146029695717560320, journalId=1234093305789726721, language=CN, title=机场大气污染物排放时空分布测算方法与特征, columnId=1234106388364981004, journalTitle=中国环境科学, columnName=大气污染与控制, runingTitle=null, highlight=null, articleAbstract=

以天津机场为例,对比了基于模型推荐值与基于机场实际运行数据修正模型参数后的排放测算结果,建立高空间(45m×45m)分辨率的排放清单,识别了排放热点.结果表明:根据推荐值计算机场单日移动源的NOx、CO、SO2、PM、HC排放量分别为2320.01,12919.90,199.36,76.83,635.92kg,根据实际情况修正运行参数后,测算移动源的产生的NOx、CO、SO2、PM、HC排放量分别为1982.65,722.25,157.27,70.48,86.38kg.单日机场的总排放峰值出现在离港高峰08:00~09:00.空间分析表明:NOx的排放热点分布于离港跑道端;CO的排放热点主要分布于进离港航班使用的联络滑行道的汇合区;SO2、PM的排放热点主要分布于进离港航班较多的停机位;HC的排放热点主要在联络滑行道的汇合区以及进离港航班较多的停机位.NOx前20%排放强度主要来源于飞机在起飞状态下的排放;CO前20%排放强度主要来源于飞机在滑行状态下的排放;SO2、HC前20%排放强度主要来源于地面支持设备在停机位服务状态下的排放和飞机在滑行状态下的排放;PM前20%排放强度主要来源于地面支持设备在停机位和服务车道产生的排放.

, correspAuthors=李晨旭, authorNote=null, correspAuthorsNote=
*责任作者,讲师,
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李晨旭(1990-),女,黑龙江牡丹江人,讲师,博士,主要从事绿色民航,交通排放模型,机场运行管理研究.发表论文10余篇. .

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李晨旭(1990-),女,黑龙江牡丹江人,讲师,博士,主要从事绿色民航,交通排放模型,机场运行管理研究.发表论文10余篇. .

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李晨旭(1990-),女,黑龙江牡丹江人,讲师,博士,主要从事绿色民航,交通排放模型,机场运行管理研究.发表论文10余篇. .

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city=null, postcode=null, companyName=null, departmentName=null, remark=School of Transportation Science and Engineering, Civil Aviation University of China, Tianjin 300300, China), AuthorCompanyExt(id=1240689604878201037, tenantId=1146029695717560320, journalId=1234093305789726721, articleId=1240689597777244890, companyId=1240689604811092161, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=中国民航大学交通科学与工程学院,天津 300300)])], figs=[ArticleFig(id=1240689612599915016, tenantId=1146029695717560320, journalId=1234093305789726721, articleId=1240689597777244890, language=EN, label=Fig.1, caption=Arrival and departure taxiways at Tianjin Binhai International Airport, figureFileSmall=mg46Hb53UQWCVDu/wl/kcw==, figureFileBig=mHTbZOM9GN6qps8n6bsdfA==, tableContent=null), ArticleFig(id=1240689612742521369, tenantId=1146029695717560320, journalId=1234093305789726721, articleId=1240689597777244890, language=CN, label=图1, caption=天津滨海国际机场进离港滑行路径, figureFileSmall=mg46Hb53UQWCVDu/wl/kcw==, figureFileBig=mHTbZOM9GN6qps8n6bsdfA==, tableContent=null), ArticleFig(id=1240689613065482814, tenantId=1146029695717560320, journalId=1234093305789726721, articleId=1240689597777244890, language=EN, label=Fig.2, caption=Distribution of operational aircraft types at Tianjin Binhai International Airport, figureFileSmall=6naQayluVr01c0UXeFBcXA==, figureFileBig=v+d8yKEcyJVjI6oT5gJn7A==, tableContent=null), ArticleFig(id=1240689613220672082, tenantId=1146029695717560320, journalId=1234093305789726721, articleId=1240689597777244890, language=CN, label=图2, caption=天津滨海国际机场运行机型分布, figureFileSmall=6naQayluVr01c0UXeFBcXA==, figureFileBig=v+d8yKEcyJVjI6oT5gJn7A==, tableContent=null), ArticleFig(id=1240689613363278429, tenantId=1146029695717560320, journalId=1234093305789726721, articleId=1240689597777244890, language=EN, label=Fig.3, caption=Pollutant emission ratio of different mobile sources before and after modification of operating parameters, figureFileSmall=V0n2alIZ+SvkSvRsRM/Vng==, figureFileBig=sbCMbJQSDFifg3MRqbaH8A==, tableContent=null), ArticleFig(id=1240689613501690476, tenantId=1146029695717560320, journalId=1234093305789726721, articleId=1240689597777244890, language=CN, label=图3, caption=运行参数修正前后的不同移动源的污染物排放占比, figureFileSmall=V0n2alIZ+SvkSvRsRM/Vng==, figureFileBig=sbCMbJQSDFifg3MRqbaH8A==, tableContent=null), ArticleFig(id=1240689613673656962, tenantId=1146029695717560320, journalId=1234093305789726721, articleId=1240689597777244890, language=EN, label=Fig.4, caption=Hourly distribution of pollutant emissions at Tianjin Binhai International Airport, figureFileSmall=8O7LneCKRu5KWSrbudqJvQ==, figureFileBig=M9qus9IT21kmdHC7LJuCzg==, tableContent=null), ArticleFig(id=1240689613824651920, tenantId=1146029695717560320, journalId=1234093305789726721, articleId=1240689597777244890, language=CN, label=图4, caption=天津滨海国际机场污染物排放的小时分布, figureFileSmall=8O7LneCKRu5KWSrbudqJvQ==, 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figureFileSmall=6n1b2CRUjLfMiQ/KRBZPNA==, figureFileBig=3RYkw2GI+6xxwSux0CrnQw==, tableContent=null), ArticleFig(id=1240689614357328588, tenantId=1146029695717560320, journalId=1234093305789726721, articleId=1240689597777244890, language=CN, label=图6, caption=天津滨海国际机场高峰小时各污染物排放热点, figureFileSmall=6n1b2CRUjLfMiQ/KRBZPNA==, figureFileBig=3RYkw2GI+6xxwSux0CrnQw==, tableContent=null), ArticleFig(id=1240689614470574815, tenantId=1146029695717560320, journalId=1234093305789726721, articleId=1240689597777244890, language=EN, label=Fig.7, caption=Hotspot emissions of pollutants arriving and leaving during peak hours at Tianjin Binhai International Airport, figureFileSmall=bGEUIFOfTpFFaAWm1AF0nw==, figureFileBig=4/kzLs+NeohDfERFYTmbGw==, tableContent=null), ArticleFig(id=1240689614596403951, tenantId=1146029695717560320, journalId=1234093305789726721, articleId=1240689597777244890, language=CN, label=图7, caption=天津滨海国际机场高峰小时各污染物进离港排放热点, figureFileSmall=bGEUIFOfTpFFaAWm1AF0nw==, figureFileBig=4/kzLs+NeohDfERFYTmbGw==, tableContent=null), ArticleFig(id=1240689616152490763, tenantId=1146029695717560320, journalId=1234093305789726721, articleId=1240689597777244890, language=EN, label=Table 1, caption=

Recommended values of parameters by the FAA (section)

, figureFileSmall=null, figureFileBig=null, tableContent=
机型GSE类型FUELBHPq (kW)LFqUq,o(min)EIGSE,CO,q[g/(kW·h)]EIGSE,HC,q[g/(kW·h)]EIGSE,PM,q[g/(kW·h)]
B737-800空调车电动00.7530000
气源车柴油317.050.971.260.244.06
飞机牵引车柴油65.650.881.650.273.62
行李货物牵引车汽油79.820.5575466.4317.049.71
传送带车汽油79.820.548323.1413.459.71
客舱服务车柴油156.660.53200.170.170.24
餐饮车柴油156.660.53150.170.170.24
油泵车柴油175.310.7120.340.210.78
污水车柴油41.780.25150.250.200.56
服务车柴油175.310.2150.210.190.39
清水车电动00.212000
ERJ190飞机牵引车柴油68.040.8051.650.273.62
行李货物牵引车汽油65.420.5535466.4317.049.71
传送带车汽油65.420.5030323.1413.459.71
餐饮车柴油142.640.53100.170.170.24
油泵车柴油142.640.25200.200.190.32
污水车柴油69.150.25150.250.200.56
清水车柴油142.640.20150.210.190.39
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FAA参数推荐值(部分)

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机型GSE类型FUELBHPq (kW)LFqUq,o(min)EIGSE,CO,q[g/(kW·h)]EIGSE,HC,q[g/(kW·h)]EIGSE,PM,q[g/(kW·h)]
B737-800空调车电动00.7530000
气源车柴油317.050.971.260.244.06
飞机牵引车柴油65.650.881.650.273.62
行李货物牵引车汽油79.820.5575466.4317.049.71
传送带车汽油79.820.548323.1413.459.71
客舱服务车柴油156.660.53200.170.170.24
餐饮车柴油156.660.53150.170.170.24
油泵车柴油175.310.7120.340.210.78
污水车柴油41.780.25150.250.200.56
服务车柴油175.310.2150.210.190.39
清水车电动00.212000
ERJ190飞机牵引车柴油68.040.8051.650.273.62
行李货物牵引车汽油65.420.5535466.4317.049.71
传送带车汽油65.420.5030323.1413.459.71
餐饮车柴油142.640.53100.170.170.24
油泵车柴油142.640.25200.200.190.32
污水车柴油69.150.25150.250.200.56
清水车柴油142.640.20150.210.190.39
), ArticleFig(id=1240689616471257908, tenantId=1146029695717560320, journalId=1234093305789726721, articleId=1240689597777244890, language=EN, label=Table 2, caption=

Pollutant emission inventory of Tianjin Binhai International Airport

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项目来源类别NOx (kg)CO (kg)SO2 (kg)PM (kg)HC (kg)总量(kg)
运行参数修正前主发动机1922.05953.28146.8733.34129.403184.94
APU50.9083.656.822.3647.01190.74
GSE347.0611882.9745.6741.13459.5112776.34
总量2320.0112919.90199.3676.83635.9216152.02
运行参数修正后主发动机1854.10653.33115.8630.5968.382722.26
APU2.986.860.440.163.8914.33
GSE125.5762.0640.9739.7314.11282.44
总量1982.65722.25157.2770.4886.383019.03
), ArticleFig(id=1240689616676778837, tenantId=1146029695717560320, journalId=1234093305789726721, articleId=1240689597777244890, language=CN, label=表2, caption=

天津滨海国际机场污染物排放清单

, figureFileSmall=null, figureFileBig=null, tableContent=
项目来源类别NOx (kg)CO (kg)SO2 (kg)PM (kg)HC (kg)总量(kg)
运行参数修正前主发动机1922.05953.28146.8733.34129.403184.94
APU50.9083.656.822.3647.01190.74
GSE347.0611882.9745.6741.13459.5112776.34
总量2320.0112919.90199.3676.83635.9216152.02
运行参数修正后主发动机1854.10653.33115.8630.5968.382722.26
APU2.986.860.440.163.8914.33
GSE125.5762.0640.9739.7314.11282.44
总量1982.65722.25157.2770.4886.383019.03
), ArticleFig(id=1240689616781636449, tenantId=1146029695717560320, journalId=1234093305789726721, articleId=1240689597777244890, language=EN, label=Table 3, caption=

The average emission intensity of pollutants at Tianjin Binhai International Airport

, figureFileSmall=null, figureFileBig=null, tableContent=
排放强度分区NOx (g)CO (g)SO2 (g)PM (g)HC (g)
(0%~3%]995.01513.30122.06127.8355.72
(3%~10%]640.24360.4766.2758.2343.39
(10%~20%]452.60272.8041.3731.5532.16
), ArticleFig(id=1240689616878105456, tenantId=1146029695717560320, journalId=1234093305789726721, articleId=1240689597777244890, language=CN, label=表3, caption=

天津滨海国际机场污染物平均排放强度

, figureFileSmall=null, figureFileBig=null, tableContent=
排放强度分区NOx (g)CO (g)SO2 (g)PM (g)HC (g)
(0%~3%]995.01513.30122.06127.8355.72
(3%~10%]640.24360.4766.2758.2343.39
(10%~20%]452.60272.8041.3731.5532.16
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机场大气污染物排放时空分布测算方法与特征
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李晨旭 * , 王紫怡
中国环境科学 | 大气污染与控制 2025,45(2): 648-656
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中国环境科学 | 大气污染与控制 2025, 45(2): 648-656
机场大气污染物排放时空分布测算方法与特征
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李晨旭* , 王紫怡
作者信息
  • 中国民航大学交通科学与工程学院,天津 300300
  • 李晨旭(1990-),女,黑龙江牡丹江人,讲师,博士,主要从事绿色民航,交通排放模型,机场运行管理研究.发表论文10余篇. .

通讯作者:

*责任作者,讲师,
Calculation methods and characteristics of temporal and spatial distribution of airport air pollutant emissions
Chen-xu LI* , Zi-yi WANG
Affiliations
  • School of Transportation Science and Engineering, Civil Aviation University of China, Tianjin 300300, China
出版时间: 2025-02-20
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以天津机场为例,对比了基于模型推荐值与基于机场实际运行数据修正模型参数后的排放测算结果,建立高空间(45m×45m)分辨率的排放清单,识别了排放热点.结果表明:根据推荐值计算机场单日移动源的NOx、CO、SO2、PM、HC排放量分别为2320.01,12919.90,199.36,76.83,635.92kg,根据实际情况修正运行参数后,测算移动源的产生的NOx、CO、SO2、PM、HC排放量分别为1982.65,722.25,157.27,70.48,86.38kg.单日机场的总排放峰值出现在离港高峰08:00~09:00.空间分析表明:NOx的排放热点分布于离港跑道端;CO的排放热点主要分布于进离港航班使用的联络滑行道的汇合区;SO2、PM的排放热点主要分布于进离港航班较多的停机位;HC的排放热点主要在联络滑行道的汇合区以及进离港航班较多的停机位.NOx前20%排放强度主要来源于飞机在起飞状态下的排放;CO前20%排放强度主要来源于飞机在滑行状态下的排放;SO2、HC前20%排放强度主要来源于地面支持设备在停机位服务状态下的排放和飞机在滑行状态下的排放;PM前20%排放强度主要来源于地面支持设备在停机位和服务车道产生的排放.

机场  /  移动源  /  排放热点  /  EDMS  /  LTO

A case study was conducted at Tianjin Airport by the research team, in which the predicted emissions using default parameters (recommended values) were compared with the results based on inputs that had been adjusted to real-world airport operations. A high spatial resolution (45m×45m) emission inventory was established in the airfield area to identify emission hotspots, and the results indicated that the daily emissions generated by all mobile sources at the airport based on recommended values were 2,320.01kg (NOx), 12,919.90kg (CO), 199.36kg (SO2), 76.83kg (PM) and 635.92kg (HC). After adjustment of inputs based on real-world airport operations, the emissions results were 1,982.65kg (NOx), 722.25kg (CO), 157.27kg (SO2), 70.48kg (PM) and 86.38kg (HC). The time between 08:00 to 09:00 (the departure peak at the airport) was identified as the period when the maximum total emissions across time of day occurred. Results of the spatial analysis showed that the emission hotspots were predominantly distributed as follows: for NOx, near the end of the departure runway; for CO, the merging area of taxiways (which connect arriving and departing flights); for SO2 and PM, the aprons with a larger number of arriving and departing flights; and for HC, both the merging area of connecting taxiways and the aprons with a larger number of flights. The top 20% of emissions were primarily from: for NOx the take-off stage of aircraft; for CO, taxiing stage of aircraft; for SO2 and HC, the ground support equipment in the parking position during the service stage and taxiing stage of aircraft; and for PM, ground support equipment at parking lots and service lanes.

airport  /  mobile source  /  emission hotspots  /  EDMS (emissions and dispersion modeling system)  /  LTO (landing and take-off)
李晨旭, 王紫怡. 机场大气污染物排放时空分布测算方法与特征. 中国环境科学, 2025 , 45 (2) : 648 -656 .
Chen-xu LI, Zi-yi WANG. Calculation methods and characteristics of temporal and spatial distribution of airport air pollutant emissions[J]. China Environmental Science, 2025 , 45 (2) : 648 -656 .
随着民航业务蓬勃发展,民航运输的大气污染物排放也逐渐成为公众关注的焦点[1-2].我国民航运输业多年来一直保持高速发展,机场起降(LTO)循环大气污染物和排放量总体呈增长趋势[3-4],预计未来航空业排放的影响愈发显著[5-7].排放显著较高的区域称为排放热点,暴露于短期、高浓度污染物将提高呼吸系统急性发病概率[8].因此深入研究机场各移动源在不同时空的排放,帮助机场更清晰地明确排放的来源、分布以及排放热点,可以为不同贡献方的减排任务、提出降低暴露风险的措施提供更精准的建议.
目前,针对机场移动源排放,国内外相关研究聚焦于估算飞机主发动机在起飞降落阶段和巡航阶段的排放总量[9],仅有少数学者考虑到机场其他移动源排放的影响[10].飞机排放测算模型主要有国际民航组织(ICAO)的简单方法、高级方法和复杂方法、美国的EPA方法、欧洲的EMEP方法[11],学者多采用ICAO的简单方法进行飞机排放测算.例如韩博等[12]运用ICAO简单方法与EPA方法,周子航[13]依据机场LTO循环数与地面支持设备情况采用ICAO简单方法,分别对京津冀机场群、成都双流国际机场展开研究,建立不同类型的排放清单.此外陈文君等[14]在此基础上设计针对飞机主发动机和地面支持设备(GSE)半小时尺度计算方法,提高了排放清单的时间分辨率.宏观空间角度上,Zhang等[15]引入真实的航空飞行轨迹信息,开发基于真实飞行轨迹的航空排放模型,探究不同机场间的排放差异及成因.
国内外对于机场污染物排放的研究主要集中在机场群或机场整体,针对机场区域高分辨率时空细分以及排放热点的研究较少.同时研究机场排放分布情况还处于起步阶段,仅有少数学者初步探讨了机场污染物的时空分布特征[13,16].在机场移动源方面,研究多聚焦于飞机主发动机或部分移动源的排放,而非全面覆盖不同类型的移动源.在上述的机场大气污染物研究中,对于机场飞行区污染物高时空分辨率测算方法仍缺乏普适性.因此本文结合运动学模型,提出基于ICAO的简单方法的机场高空间分辨率的污染物排放测算方法,以天津滨海国际机场(以下简称天津机场)为例,建立机场高时空分辨率排放清单,确定各区域的排放热点,以及污染物在时间和空间上的分布特征.以期为相关部门制定更加科学的空气质量改善方案提供技术支持.同时,为机场管理部门制定航班调度计划和环保措施提供参考依据,从而降低机场区域的空气污染程度.
本文选取天津机场作为研究对象,该机场为拥有平行双跑道的民用国际机场.跑道间距2100m,初期采用隔离平行运行模式,东跑道用于降落,西跑道用于起飞,西跑道长3600m、宽60m,等级4F;东跑道长3200m、宽45m,等级4E.
机场飞行区移动源包括飞机主发动机、辅助动力装置(APU)以及GSE.本文针对飞机主发动机排放的污染物,基于ICAO的简单方法[17-18]建立时空分布排放测算模型.以机场跑道起始点为原点,对机场飞行区进行网格划分,建立以L(m)为单位长度的平面直角坐标系网格图,将不同污染物的排放量以L(m)×L(m)的空间分辨率呈现.飞机主发动机排放具体计算模型如公式(1).
式中:Ex,y,i,jj型飞机主发动机在(xy)坐标处产生的i类污染物(HC、CO、NOx、SO2、PM)排放量,g;FFj,typej型飞机在空间type的燃油消耗率,kg/s;EIi,j,typej型飞机产生的i类污染物在type的排放指数,g/kg,即消耗1kg燃油的污染物排放量;Nejj型飞机发动机个数;i代表污染物的类型;j代表机型;type包括飞机位于type1(离港跑道)、type2(进港跑道)和type3(滑行道).
从飞机松刹车开始加速到飞机离开地面,在此阶段飞机的加速度随速度增加而逐步衰减[19],飞机起飞时在跑道上的滑行时间计算模型如式(2)~(5)所示.
式中:a0,jj型飞机在离港跑道端的初始加速度,m/s2kjj型飞机离开地面时的加速度与初始加速度的比值,kj越大,说明在加速过程中,加速度的衰减越快;aT,jj型飞机离开地面时的加速度,每次起飞过程基本保持恒定,m/s2Vlof,jj型飞机起飞离地速度,m/s2Vx,y,type1,jj型飞机在(x,y)坐标处的速度,m/s;ax,y,type1,jj型飞机在离港跑道(x,y)坐标处的加速度,m/s2L为单位长度,m;tx,y,type1,jj型飞机在离港跑道(x,y)坐标处单位面积内的滑行时间(s);type1代表飞机位于离港跑道.
不放阻力伞着陆过程可近似为匀减速直线运动过程[20],飞机着陆时在跑道上的滑行时间计算模型如公式(6)~(7)所示.
式中:Vx,y,type2,jj型飞机在进港跑道(x,y)坐标处的速度,m/s;atype2,jj型飞机在进港跑道(x,y)坐标处的加速度,m/s2tx,y,type2,jj型飞机在进港跑道(x,y)坐标处单位面积滑行的时间,s;type2代表飞机位于进港跑道.
飞机在滑行道上的滑行时间计算模型如公式(8)所示.机场的滑行道分为主滑行道、快速出口滑行道、普通滑行道等,不同滑行道的滑行速度限制有差异.
式中:type3代表飞机位于滑行道.
APU排放量在ICAO建议的运行负荷条件下计算[17],其中APU的运行周期由启动(无负荷)、正常运转(最大环境控制系统)、大负荷(主发动机启动)三个负荷条件来表示,APU的排放主要产生在停机坪内,具体如公式(9).
式中:EAPU,x,y,ijj型飞机APU在(x,y)坐标处产生i类污染物的排放量(g);Tload,c为负荷c条件下的运行时间(min);EIAPU,i,j,cj型飞机在负荷c条件下产生的i类污染物的排放指数,kg/h;i代表污染物的类型;j代表机型;c代表APU的负荷条件.
GSE是机场配备的为飞机提供保障服务的设备,其中保障车辆主要包括:电源车、空调车、气源车、升降平台车、行李货物牵引车、传送带车、餐饮车、客梯车、清水车、污水车、垃圾车、飞机牵引车、油泵车、除冰车、摆渡车等.航空排放与扩散模型(EDMS)由美国联邦航空局(FAA)和美国空军合作开发,本文主要利用EDMS模型中的NON- ROAD模型计算GSE的污染物排放量[21],GSE的排放主要产生在停机坪和服务车道上,具体如式(10)所示.
式中:EGSE,x,y,i,qq类型GSE在(x,y)坐标处产生的i类污染物排放量,g;BHPqq类型GSE发动机的平均额定功率,kW;LEq是第q类型车辆的负载因子;Uq,o是第q类型车辆在o状态下(包括作业状态和行驶状态)的时长,h;EIGSE,i,qq类型GSE产生的i类污染物的排放速率,g/(kW⋅h);i代表污染物的类型;q代表车辆的类型.FAA提供的推荐值[21]表1所示.
飞机主发动机方面,对滑行时间参数进行修正.本文基于天津机场2023年12月20日实际航班数据,结合实际运行规则设计的飞机进离港路径,如图1所示.计算各机型进离港滑行时间,修正了ICAO简单方法中的运行时间.飞机滑行包括进港滑行和离港滑行,离港时以停机坪为起点,跑道端入口为终点;进港时以跑道出口为起点,停机坪为终点.本文根据天津机场地面运行的基本规则,分别计算各停机位至跑道的滑行时间.根据中国民航局规定,飞机滑行速度最大为50km/h,据此,本文假定飞机在主滑行道和快速出口滑行道的滑行速度为50km/h,普通滑行道的滑行速度为25km/h,皆为匀速行驶,不考虑飞机转弯时的速度变化.天津机场每日按需实施双跑道隔离平行运行模式,即RWY16R/34L用于起飞,RWY16L/34R用于着陆.
APU方面,根据天津机场停机位实际配备APU替代设施情况,对污染物排放量进行修正.天津机场101~107、112~118、201~230、409~419、501~504、886~899、901~905号停机位配有APU替代设施(静变电源和飞机地面专用空调).
GSE方面,根据对机场工作人员的调查访问,对EDMS建议的不同机型所需的特种车辆类型进行调整,以国内广泛使用的B737-800(以下简称B738)为例,该机型所需的特种车辆包括飞机牵引车、行李货物牵引车、传送带车、客梯车、餐饮车、油泵车、清水车、污水车、垃圾车.不使用气源车和空调车.根据机场实际情况,行李牵引车和传送带车将EDMS建议的汽油车调整为柴油车,同时考虑机场GSE整体电动化水平,除油泵车外其他特种车辆电动化比例按20%计算.
文章2.1节对比了基于模型推荐值与基于机场实际运行数据修正模型参数后的排放测算结果.在2.2节、2.3节、2.4节是基于参数修正后的排放测算量对机场污染物排放的时空分布特征以及进离港对排放热点分布的影响进行分析.
天津机场2023年12月20日起降13种机型、共342架次航班.机型起降分布统计结果如图2所示,其中起降占比较大的机型为B738、A320,占比分别为50.88%、21.18%,其他机型运行数量占比均低于10.00%.
表2所示,计算天津机场当日各类移动源的大气污染物排放清单.根据ICAO推荐的主发动机、APU运行数据,以及EDMS推荐的GSE运行数据计算移动源排放的NOx、CO、SO2、PM、HC的总量分别为2320.01kg、12919.90kg、199.36kg、76.83kg、635.92kg.根据天津机场实际情况,修正不同移动源污染物排放量,移动源排放的NOx、CO、SO2、PM、HC的总量分别为1982.65kg、722.25kg、157.27kg、70.48kg、86.38kg.
从不同排放源来看,如图3所示,修正前NOx和SO2主要来源于飞机发动机,CO、PM和HC主要来源于GSE.占比为14.36%.HC、SO2和PM的排放量相对较少,分别为3.94%、1.23%、0.48%.如图3(b)所示,修正后NOx、CO、SO2以及HC主要来源于飞机主发动机的排放.PM排放量中主发动机占比43.40%,GSE占比56.37%.
从总量上看,参数修正后的主发动机、APU、GSE的总排放量分别减少了14.53%、92.49%、97.79%.其中主发动机排放量的减少是由于飞机滑行实际运行时间小于推荐时间,经计算,飞机进港平均滑行时间为6.94min,离港平均滑行时间为5.58min,飞机主发动机的NOx、CO、SO2、PM、HC的排放量分别减少了3.54%、31.47%、21.11%、8.25%、47.16%.APU排放量的减少是考虑了机场停机位实际配备了APU替代设施的情况.GSE排放量减少主要由于对FAA建议的不同机型所需的特种车辆类型进行了调整,同时考虑了机场GSE电动化比例.GSE排放的NOx、CO、SO2、PM、HC分别减少了63.82%、99.48%、10.29%、3.40%、96.93%,其中CO和HC排放量的减少比例最大,主要是由于根据实际情况将行李牵引车和传送带车的汽油车调整为柴油车,柴油车CO、HC排放因子显著低于汽油车.其中行李牵引车汽油车CO、HC排放因子分别是柴油车的88.99倍、63.55倍,传送带车汽油车CO、HC排放因子分别是柴油车的94.16倍、52.79倍[21].
图4图5可知,一天内机场在08:00~21:00排放较多,0:00~6:00排放较少.天津机场计算日当天的起降高峰小时为13:00~14:00,总排放量峰值出现在离港高峰08:00~09:00,主要由于飞机在起飞阶段会产生大量NOx.从整体来看,污染物排放量与起降架次趋势较为一致,而当出现起降架次较为接近的情况时,排放量还与进离港比例、机型差异、滑行路径等因素有关.
15:00时段至16:00时段航班数量增多,但NOx排放量由135.05kg增加至122.22kg,这是由于15:00时段的离港航班数量多于16:00时段,飞机离港时主发动机会产生大量NOx,同时15:00时段离港了一架A350-941,该机型在起飞、爬升阶段的NOx排放指数高于常见的窄体机A320的排放指数[18].
通过统计天津机场计算日当天进离港航班总量,确定该日的高峰小时为13:00~14:00.以天津机场跑道RWY16L/34R起始点为原点,创建高时间(小时)和空间(45m×45m)分辨率的排放清单,用于识别高峰小时各污染物的排放热点.本研究将单位面积(45m×45m)内排放量位于前3%的区域定义为排放热点.由于该高峰小时进离港航班的停机位皆配备了APU替代设施,因此移动源污染物计算仅包括飞机主发动机和GSE.
图6(a)所示,NOx在单位面积内所排放的最大值为1612.96g,最小值为1.95g.NOx的排放热点为离港跑道端,排放主要来源于飞机主发动机,起飞阶段NOx的排放指数远高于滑行阶段的排放指数,同时起飞过程在跑道端的速度最慢,在单位面积内所需的时间最长,因此离港跑道端的NOx排放量最高.如图6(b)所示,CO在单位面积内所排放的最大值为513.30g,最小值为0.50g.CO的排放热点集中在飞机进离港前在联络滑行道的汇合区,这是由于CO的排放主要来源于飞机主发动机,而该联络滑行道汇合区相较于其他滑行区域所使用的飞机数量最多.如图6(c)图6(d)所示,SO2、PM的排放热点都主要分布在进离港航班较多的停机位.SO2、PM在单位面积内所排放的最大值分别为200.85g、199.23g,最小值分别为0.56g、0.09g.GSE在停机位内排放的SO2、PM均高于飞机主发动机起飞、滑行阶段在单位面积内的排放量.以B738为例,在停机位单位面积内该机型主发动机的SO2、PM排放量分别为1.46g、0.09g,而GSE的SO2、PM排放量分别为88.27g、99.46g.如图6(e)所示,HC在单位面积内所排放的最大值为68.24g,最小值为0.13g.HC的排放热点主要在联络滑行道的汇合区以及进离港航班较多的停机位,由于主发动机与GSE在单位面积内HC排放量差距不显著,因此在经过飞机较多的滑行道和停机位都会成为排放热点.
本研究将单位面积(45m×45m)内的排放量定义为排放强度,前3%、10%、20%各污染物平均排放强度如表3所示.NOx、CO不同区间内平均排放强度差值较大,NOx前20%排放强度主要来源于飞机在起飞状态下的排放,CO前20%排放强度主要来源于飞机在滑行状态下的排放;SO2、PM、HC不同区间内平均排放强度差值较小,SO2、HC前20%排放强度主要来源于GSE在停机位服务状态下的排放和飞机在滑行状态下的排放,PM前20%排放强度主要来源于GSE在停机位和服务车道产生的排放.
进离港航班在高峰小时各污染物排放热点的分布,如图7所示.图7(a)图7(b)所示的NOx的排放热点全部分布于离港航班的起飞跑道端,主要因为相较于滑行阶段,起飞阶段是NOx排放的主要来源,通常伴随着高推力需求和较高的燃烧温度.如图7(c)图7(d)所示,CO的排放热点全部分布于进港航班联络滑行道的汇合区和A350所使用的停机位,联络滑行道的汇合区的排放热点主要由于使用该联络滑行道的停机坪区域进港航班数量较多;同时宽体机的停机位也可能会成为CO的排放热点,停机位的排放热点主要来源于服务A350的GSE排放,该机型为宽体客机,GSE的服务时间较长,产生较多的CO.如图7(e)图7(j)所示,SO2、PM、HC的排放热点分布受进离港因素影响较小,SO2、PM、HC的排放热点分布在进港航班中占比44.44%、50.00%、45.00%,均位于停机位,来源于GSE的排放.综合来看,NOx排放热点分布受离港航班影响较大,CO、SO2、PM、HC分布进离港差异不明显,主要受到航班数量的影响.
在本研究的模型测算中,许多影响因素也会导致结果的不确定性.模型中的飞机主发动机和GSE排放量测算部分,不确定性主要来源于以下几个方面:第一,发动机的老化因子.不同发动机(包括飞机主发动机和GSE的发动机)在不同运行条件下的老化因子未予以考虑.第二,排放因子.本文飞机主发动机的排放因子采用的EEDB中的推荐值,而排放因子推荐值主要在海平面静态条件和7%、30%、85%、100%额定推力设置下测试[22],因此推荐的发动机额定推力可能与飞机实际飞行状态存在差异.第三,GSE发动机的负载.GSE的负载采用FAA的推荐值,实际中某些GSE的负载可能与推荐值不完全相等,例如飞机牵引车的负载主要取决于该飞机实际的起飞重量.模型中的加速度运动计算部分,由于未考虑由管制、天气等因素导致的飞机排队,则滑行阶段的飞机等待时间和滑行速度的不确定性较大.
3.1 本文提出将ICAO排放模型和EDMS模型联用的排放物网格化测算方法,实现根据实际运行数据快速测算机场高空间分辨率下的排放量、识别排放热点,为飞行区污染物排放时空分布评估与排放热点分析提供可靠方法.
3.2 根据机场移动源实际运行数据修正ICAO排放模型运行参数推荐值,修正后主发动机、APU、GSE的总排放量相较于修正前分别减少了14.53%、92.49%、97.79%.
3.3 机场排放热点的分布主要与停机位分配、滑行路径分配、飞机滑跑速度、GSE类型有关.NOx排放热点分布于在离港跑道端,受离港航班影响较大.SO2、PM、HC的排放热点分布于进离港航班较多的停机位,且HC的排放热点也会分布在联络滑行道的汇合区.综合来看,各污染物排放热点多数分布在停机坪,而此区域机场工作人员和旅客聚集多、暴露风险高.
  • 国家自然科学基金资助项目(U2133206)
  • 中央高校基本科研业务费(KJZ53420210017)
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  • 接收时间:2024-09-02
  • 首发时间:2026-03-17
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  • 收稿日期:2024-09-02
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国家自然科学基金资助项目(U2133206)
中央高校基本科研业务费(KJZ53420210017)
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    中国民航大学交通科学与工程学院,天津 300300

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