Impact of building configuration on air quality in street canyon

Xie, Xiaomin; Huang, Zhen; Wang, Jiasong

doi:10.1016/j.atmosenv.2005.03.043

Cited by 157 publications

(97 citation statements)

References 15 publications

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“…Many studies focussed on investigations of circulation (e.g., DePaul and Sheih, 1986;Kovar-Panskus et al, 2002;Cheng and Hu, 2004;Lien et al, 2004) and dispersion of pollutants inside street canyons (e.g., Ketzel et al, 2002;Baik and Kim, 2002;Kim and Baik, 2004;Xie et al, 2005;Nazridoust and Ahmadi, 2006). When the wind flow is perpendicular to the street, a recirculation vortex develops.…”

Section: Introductionmentioning

confidence: 99%

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Correlation between traffic density and particle size distribution in a street canyon and the dependence on wind direction

et al. 2006

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Abstract. Combustion of fossil fuel in gasoline and diesel powered vehicles is a major source of aerosol particles in a city. In a street canyon, the number concentration of particles smaller than 300 nm in diameter, which can be inhaled and cause serious health effects, is dominated by particles originating from this source.In this study we measured both, particle number size distribution and traffic density continuously in a characteristic street canyon in Germany for a time period of 6 months. The street canyon with multistory buildings and 4 traffic lanes is very typical for larger cities. Thus, the measurements also are representative for many other street canyons in Europe. In contrast to previous studies, we measured and analyzed the particle number size distribution with high size resolution using a Twin Differential Mobility Analyzer (TDMPS). The measured size range was from 3 to 800 nm, separated into 40 size channels.Correlation coefficients between particle number concentration for integrated size ranges and traffic counts of 0.5 were determined. Correlations were also calculated for each of the 40 size channels of the DMPS system, respectively. We found a maximum of the correlation coefficients for nucleation mode particles in the size range between 10 and 20 nm in diameter.Furthermore, correlations between traffic and particles in dependence of meteorological data were calculated. Relevant parameters were identified by a multiple regression method. In our experiment only wind parameters have influenced the particle number concentration significantly. High correlation coefficients (up to 0.8) could be observed in the lee side of the street canyon for particles in the range between 10 and 100 nm in diameter. These values are significantly higher than correlation coefficients for other wind directions and other particle sizes. A minimum was found in the luff Correspondence to: J. Voigtländer (jensv@tropos.de) side of the street. These findings are in good agreement with theory of fluid dynamics in street canyons.

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Section: Introductionmentioning

confidence: 99%

“…0.5) no recirculation vortex is observed. Also the shape of the roof influences the circulation inside the canyon (Xie et al, 2005). Additionally, the roof level wind speed also influences the circulation inside the canyon.…”

Section: Introductionmentioning

confidence: 99%

Correlation between traffic density and particle size distribution in a street canyon and the dependence on wind direction

et al. 2006

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“…We used similar experimental method in the present paper. A significant role of a building geometry influence on the flow patterns and pollutant dispersion was proved in [9]. Highly three-dimensional flow and an important role of a turbulent pollution exchange at roof level above the street intersections was demonstrated in [8,10].…”

Section: Introductionmentioning

confidence: 93%

Ventilation of idealised urban area, LES and wind tunnel experiment

Kukačka

Fuka

Nosek

et al. 2014

EPJ Web of Conferences

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Abstract. In order to estimate the ventilation of vehicle pollution within street canyons, a wind tunnel experiment and a large eddy simulation (LES) was performed. A model of an idealised urban area with apartment houses arranged to courtyards was designed according to common Central European cities. In the wind tunnel, we assembled a set-up for simultaneous measurement of vertical velocity and tracer gas concentration. Due to the vehicle traffic emissions modelling, a new line source of tracer gas was designed and built into the model. As a computational model, the LES model solving the incompressible Navier-Stokes equations was used. In this paper, we focused on the street canyon with the line source situated perpendicular to an approach flow. Vertical and longitudinal velocity components of the flow with the pollutant concentration were obtained from two horizontal grids placed in different heights above the street canyon. Vertical advective and turbulent pollution fluxes were computed from the measured data as ventilation characteristics. Wind tunnel and LES data were qualitatively compared. A domination of advective pollution transport within the street canyon was determined. However, the turbulent transport with an opposite direction to the advective played a significant role within and above the street canyon.

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“…As previously mentioned, both the building shape and their arrangement in the urban environment can impact on air pollution around buildings (Xie, 2005). These specific measures can contribute to the improvement of air quality in a certain location, but they do not affect the overall worsening conditions of the Earth's atmosphere.…”

Section: Introductionmentioning

confidence: 99%

Renovation of a building and its impact on air pollution.

Kapalo¹

2017

Air and Water Components of the Environment 2017

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ABSTRACT. -Renovation of a building and its impact on air pollution. The main purpose of the research presented in this paper is to quantify the amount of carbon dioxide produced by a standard house with four occupants before and after rehabilitation measures. As expected, these retrofitting actions had a positive effect on energy consumption and, in consequence, the CO 2 emissions decreased significantly. After applying thermal insulation, CO 2 production values derived from heating of the building were reduced by 68 %. The replacement of electrical household appliances decreased CO 2 emissions by 53 %. Also, based on experimental measurements we calculated CO 2 production due to human breathing, for different types of activity. Subsequently, the yearly quantity of CO 2 produced by breathing by a standard fourmember family was calculated. Finally, we estimated the contribution of human breathing to the total household CO 2 production.

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Impact of building configuration on air quality in street canyon

Cited by 157 publications

References 15 publications

Correlation between traffic density and particle size distribution in a street canyon and the dependence on wind direction

Correlation between traffic density and particle size distribution in a street canyon and the dependence on wind direction

Ventilation of idealised urban area, LES and wind tunnel experiment

Renovation of a building and its impact on air pollution.

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