Navigation Links
Air pollution, gone with the wind
Date:11/1/2012

Montreal, November 1, 2012 As urban populations expand, downtown buildings are going nowhere but up. The huge energy needs of these skyscrapers mean that these towers are not only office buildings, they're polluters with smokestacks billowing out toxins from the rooftop. Our cities are dirtier than we think. New research from Concordia University just might clean them up.

By examining the trajectory and amount of air pollution from a building to its neighbours downwind, Concordia researchers Ted Stathopoulos and Bodhisatta Hajra have come up with environmentally friendly building guidelines for our modern cities. This provides a much-needed update to the industry standards developed decades ago by the American Society of Heating, Refrigerating and Air-Conditioning Engineers the international technical society that sets the rules for building ventilation.

Stathopoulos a professor in Concordia's Department of Building, Civil and Environmental Engineering partnered with emerging researcher and recent Concordia graduate Hajra to pen the study, recently featured in the peer-reviewed journal, Building and Environment. To perform the research, they hunkered down in Concordia's cutting-edge wind tunnel laboratory, a huge underground research facility which allows engineers to test the atmospheric dispersion of pollution and toxins in any given setting.

"We created model configurations consisting of buildings of various sizes and shapes," says Stathopoulos, an inveterate researcher who was awarded the prestigious Davenport Medal by the International Association for Wind Engineering in September 2012.

Hajra, who received his doctorate during Concordia's fall convocation on October 30, goes on to explain: "we then placed our models downwind of a building that was emitting toxins to trace the path from polluter to polluted. That allowed us to see how much pollution was being absorbed by buildings downwind and where on those buildings that pollution was most concentrated."

Their findings show that the process by which air pollution spreads from one building's exhaust stack to another's intake is affected by the height and spacing between buildings, something that can be optimized by architects and engineers as new towers are constructed.

What does this mean for the future of downtown buildings? "We came up with three main guidelines for the placement of stack and intake in order to minimize the amount of air pollution that makes its way into downwind buildings," says Stathopoulos.

First, intake vents on buildings downwind of a polluter need to be placed upwind of that building's stack, and closer to its more sheltered wall. Second, air intakes should not be placed on rooftop locations downwind of a low stack and the protected wall of the emitting building. Lastly, increased spacing between buildings can reduce the possibility that pollutants from one will be re-ingested by another.

"While our research may not reduce the amount of outdoor pollution in our cities," explains Stathopoulos, "it can certainly help ensure that this same dirty air is not re-circulated indoors."


'/>"/>

Contact: Clea Desjardins
clea.desjardins@concordia.ca
514-848-2424 x5068
Concordia University
Source:Eurekalert  

Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Air pollution, gone with the wind
(Date:5/24/2016)... Maryland (PRWEB) , ... May 24, 2016 , ... ... announced the appointment of Jonathan (Jon) Otterstatter to its board of ... is a proven leader in the development of technological innovations that lead to ...
(Date:5/24/2016)... ... May 24, 2016 , ... WaterAid launched the #perioddrama campaign to mark Menstrual Hygiene ... billion women around the world who do not have access to a toilet, even when ... about their dread of #perioddrama. The (sometimes hilarious) results help shine a light on the ...
(Date:5/24/2016)... ... May 24, 2016 , ... Aloria Health Announces ... Begin In June , Aloria Health, specializing in a re-imagined, client-oriented approach to ... Milwaukee, its first treatment facility for outpatient, day treatment and residential care. Aloria ...
(Date:5/24/2016)... ... May 24, 2016 , ... Global ... and education, today announced that it has named Scott Santarella as its new ... Addario Lung Cancer Foundation (ALCF) in San Francisco, where he successfully helped to ...
(Date:5/24/2016)... , ... May 24, 2016 , ... Dignity Health has ... month. The new facility is licensed under Dignity Health Arizona General Hospital, which ... of Dignity Health in Arizona, said that the new facility will complement Dignity Health’s ...
Breaking Medicine News(10 mins):
(Date:5/24/2016)... 24, 2016 Los innovadores ... del mundo, introduce catéteres para la intervención de ... una compañía global especializada en el suministro de ... su cartera incluyendo productos para tratar la enfermedad ... PTA son los dispositivos de primera entrada de ...
(Date:5/24/2016)... -- Een app die artsen over de ... kunnen behandelen, hun kennis kunnen delen en van elkaar ... en revolutionaire MDLinking App, ontwikkeld door een internationale groep ... Flu en oncologisch chirurg dr. Gijs van Acker ... op dinsdag 24 mei officieel gepresenteerd op het Amsterdam ...
(Date:5/23/2016)... May 23, 2016 Transparency Market ... Exocrine Pancreatic Insufficiency Market - Global Industry Analysis, Size, ... According to the report, the exocrine pancreatic insufficiency market ... from 2015 to 2023 to reach US$2.85 Bn by ... condition characterized by the deficiency of the exocrine pancreatic ...
Breaking Medicine Technology: