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    Feasibility Study of Using Nebulizer-Retrofitted UAVs at Construction Projects: The Case Study of Residential Jobsites in Utah

    Source: Journal of Construction Engineering and Management:;2022:;Volume ( 148 ):;issue: 010::page 05022009
    Author:
    Ali Hassandokht Mashhadi
    ,
    Rod Handy
    ,
    Mohammad Farhadmanesh
    ,
    Abbas Rashidi
    ,
    Trenton Honda
    ,
    Darrah Kaye Sleeth
    ,
    Trent Henry
    DOI: 10.1061/(ASCE)CO.1943-7862.0002368
    Publisher: ASCE
    Abstract: Increased heat stress and air pollution are two major causes of health issues and productivity loss in the construction industry. This will be exacerbated by global warming and an increased possibility of extreme weather conditions in the future. Previous studies revealed that each 1°C rise in temperature reduces construction workers’ productivity by up to 2%. Also, it is found that a 10  μg/m3 particulate matter sized 2.5 μm (PM2.5) fluctuation over 25 days lowers workers’ daily production by 1%. As an effective dust control and cooling strategy, water spraying is used by practitioners to mitigate the effect of air pollution and heat-related problems on construction workers. Considering low costs and high mobility, unmanned aerial vehicles (UAVs) could be considered as a potential alternative for ground-based, stationary water spraying systems. To this end, a case study approach is adopted in this project to investigate the feasibility of using nebulizer-retrofitted UAVs in controlling air pollution and reducing heat stress at construction job sites. The case study consists of two different residential job sites in the state of Utah: one in Salt Lake City and the other one in St. George. The main contribution of this study is to determine the effect of aerial water spraying on air temperature and pollution at job sites. The outcomes of this study show that the average wet bulb globe temperature (WBGT) decreases 1.7° during the flight phase compared to average values for preflight and postflight phases. The aerial water spraying technique yields better and more water-efficient results in decreasing temperature at job sites compared to the existing approaches, such as stationary fans. Moreover, the results of PM variations illustrate that the mean value of particulate change was significantly different between flight and preflight (p=0.005), and flight and postflight (p<0.001) modes. Future studies should include the deployment of multiple drones flying simultaneously at job sites to cover larger areas.
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      Feasibility Study of Using Nebulizer-Retrofitted UAVs at Construction Projects: The Case Study of Residential Jobsites in Utah

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4288005
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    contributor authorAli Hassandokht Mashhadi
    contributor authorRod Handy
    contributor authorMohammad Farhadmanesh
    contributor authorAbbas Rashidi
    contributor authorTrenton Honda
    contributor authorDarrah Kaye Sleeth
    contributor authorTrent Henry
    date accessioned2022-12-27T20:47:54Z
    date available2022-12-27T20:47:54Z
    date issued2022/10/01
    identifier other(ASCE)CO.1943-7862.0002368.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4288005
    description abstractIncreased heat stress and air pollution are two major causes of health issues and productivity loss in the construction industry. This will be exacerbated by global warming and an increased possibility of extreme weather conditions in the future. Previous studies revealed that each 1°C rise in temperature reduces construction workers’ productivity by up to 2%. Also, it is found that a 10  μg/m3 particulate matter sized 2.5 μm (PM2.5) fluctuation over 25 days lowers workers’ daily production by 1%. As an effective dust control and cooling strategy, water spraying is used by practitioners to mitigate the effect of air pollution and heat-related problems on construction workers. Considering low costs and high mobility, unmanned aerial vehicles (UAVs) could be considered as a potential alternative for ground-based, stationary water spraying systems. To this end, a case study approach is adopted in this project to investigate the feasibility of using nebulizer-retrofitted UAVs in controlling air pollution and reducing heat stress at construction job sites. The case study consists of two different residential job sites in the state of Utah: one in Salt Lake City and the other one in St. George. The main contribution of this study is to determine the effect of aerial water spraying on air temperature and pollution at job sites. The outcomes of this study show that the average wet bulb globe temperature (WBGT) decreases 1.7° during the flight phase compared to average values for preflight and postflight phases. The aerial water spraying technique yields better and more water-efficient results in decreasing temperature at job sites compared to the existing approaches, such as stationary fans. Moreover, the results of PM variations illustrate that the mean value of particulate change was significantly different between flight and preflight (p=0.005), and flight and postflight (p<0.001) modes. Future studies should include the deployment of multiple drones flying simultaneously at job sites to cover larger areas.
    publisherASCE
    titleFeasibility Study of Using Nebulizer-Retrofitted UAVs at Construction Projects: The Case Study of Residential Jobsites in Utah
    typeJournal Article
    journal volume148
    journal issue10
    journal titleJournal of Construction Engineering and Management
    identifier doi10.1061/(ASCE)CO.1943-7862.0002368
    journal fristpage05022009
    journal lastpage05022009_11
    page11
    treeJournal of Construction Engineering and Management:;2022:;Volume ( 148 ):;issue: 010
    contenttypeFulltext
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