Wind tunnel study of different roof geometry configurations for wind induced natural ventilation into stairwell in tropical climate
Demand on buildings is in increasing trend all over the world as human population increases. This subsequently increases the electricity consumption and result in more greenhouse gases release to the atmosphere causing global warming. Natural ventilation is an effective method to reduce building...
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| Main Authors: | , , , |
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| Format: | Article |
| Published: |
Research India Publications
2018
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| Online Access: | http://psasir.upm.edu.my/id/eprint/74443/ http://www.ripublication.com/ |
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| Summary: | Demand on buildings is in increasing trend all over the world
as human population increases. This subsequently increases the
electricity consumption and result in more greenhouse gases
release to the atmosphere causing global warming. Natural
ventilation is an effective method to reduce building electricity
consumption. In this study, two types of roof namely flat
surface roof and ellipse surface roof were investigated through
wind tunnel experiment to evaluate the ventilation performance
of a stairwell in tropical climate. The incoming wind speed of
range 1 m/s to 5 m/s is set in the wind tunnel to simulate the
wind speed in Malaysia. The wind speed of all openings for the
reduced stairwell model is of the main concern because higher
wind speed will lead to higher air change rate (ACH), which is
the criteria to assess the natural ventilation performance of a
building. Results have indicated that the measured air speed at
inlets and outlets are higher for ellipse surface roof as compared
to those of the flat surface roof. The measured air speed
difference is more than 22.8% on outlet openings for ellipse
surface roof when the incoming wind speed is 2-5 m/s. The
study indicates that roof design configuration has an impact on
ventilation performance in tropical climate as the temperature
difference between inside and outside is negligible. |
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