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Application of wind as a renewable energy source for passive cooling through windcatchers integrated with wing walls

Generally, two-third of a building's energy is consumed by heating, ventilation and air-conditioning systems. One green alternative for conventional air conditioner systems is the implementation of passive cooling. Wing walls and windcatchers are two prominent passive cooling techniques which u...

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Main Authors: Nejat, Payam, Jomehzadeh, Fatemeh, Hussen, Hasanen Mohammed, Calautit, John Kaiser, Abd. Majid, Muhd. Zaimi
Format: Article
Language:English
Published: MDPI AG 2018
Subjects:
TA Engineering (General). Civil engineering (General)
Online Access:http://eprints.utm.my/id/eprint/86583/1/PayamNejat2018_ApplicationofWindasaRenewableEnergySource.pdf
http://eprints.utm.my/id/eprint/86583/
http://dx.doi.org/10.3390/en11102536
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spelling my.utm.865832020-09-30T08:43:50Z http://eprints.utm.my/id/eprint/86583/ Application of wind as a renewable energy source for passive cooling through windcatchers integrated with wing walls Nejat, Payam Jomehzadeh, Fatemeh Hussen, Hasanen Mohammed Calautit, John Kaiser Abd. Majid, Muhd. Zaimi TA Engineering (General). Civil engineering (General) Generally, two-third of a building's energy is consumed by heating, ventilation and air-conditioning systems. One green alternative for conventional air conditioner systems is the implementation of passive cooling. Wing walls and windcatchers are two prominent passive cooling techniques which use wind as a renewable resource for cooling. However, in low wind speed regions and climates, the utilization of natural ventilation systems is accompanied by serious uncertainties. The performance of ventilation systems can be potentially enhanced by integrating windcatchers with wing walls. Since previous studies have not considered this integration, in the first part of this research the effect of this integration on the ventilation performance was assessed and the optimum angle was revealed. However, there is still gap of this combination; thus, in the second part, the impact of wing wall length on the indoor air quality factors was evaluated. This research implemented a Computational Fluid Dynamics (CFD) method to address the gap. The CFD simulation was successfully validated with experimental data from wind tunnel tests related to the previous part. Ten different lengths from 10 cm to 100 cm were analyzed and it was found that the increase in wing wall length leads to a gradual reduction in ventilation performance. Hence, the length does not have a considerable influence on the indoor air quality factors. However, the best performance was seen in 10 cm, that could provide 0.8 m/s for supply air velocity, 790 L/s for air flow rate, 39.5 1/h for air change rate, 107 s for mean age of air and 92% for air change effectiveness. MDPI AG 2018 Article PeerReviewed application/pdf en http://eprints.utm.my/id/eprint/86583/1/PayamNejat2018_ApplicationofWindasaRenewableEnergySource.pdf Nejat, Payam and Jomehzadeh, Fatemeh and Hussen, Hasanen Mohammed and Calautit, John Kaiser and Abd. Majid, Muhd. Zaimi (2018) Application of wind as a renewable energy source for passive cooling through windcatchers integrated with wing walls. Energies, 11 (10). pp. 1-23. ISSN 1996-1073 http://dx.doi.org/10.3390/en11102536 DOI:10.3390/en11102536
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
language English
topic TA Engineering (General). Civil engineering (General)
spellingShingle TA Engineering (General). Civil engineering (General)
Nejat, Payam
Jomehzadeh, Fatemeh
Hussen, Hasanen Mohammed
Calautit, John Kaiser
Abd. Majid, Muhd. Zaimi
Application of wind as a renewable energy source for passive cooling through windcatchers integrated with wing walls
description Generally, two-third of a building's energy is consumed by heating, ventilation and air-conditioning systems. One green alternative for conventional air conditioner systems is the implementation of passive cooling. Wing walls and windcatchers are two prominent passive cooling techniques which use wind as a renewable resource for cooling. However, in low wind speed regions and climates, the utilization of natural ventilation systems is accompanied by serious uncertainties. The performance of ventilation systems can be potentially enhanced by integrating windcatchers with wing walls. Since previous studies have not considered this integration, in the first part of this research the effect of this integration on the ventilation performance was assessed and the optimum angle was revealed. However, there is still gap of this combination; thus, in the second part, the impact of wing wall length on the indoor air quality factors was evaluated. This research implemented a Computational Fluid Dynamics (CFD) method to address the gap. The CFD simulation was successfully validated with experimental data from wind tunnel tests related to the previous part. Ten different lengths from 10 cm to 100 cm were analyzed and it was found that the increase in wing wall length leads to a gradual reduction in ventilation performance. Hence, the length does not have a considerable influence on the indoor air quality factors. However, the best performance was seen in 10 cm, that could provide 0.8 m/s for supply air velocity, 790 L/s for air flow rate, 39.5 1/h for air change rate, 107 s for mean age of air and 92% for air change effectiveness.
format Article
author Nejat, Payam
Jomehzadeh, Fatemeh
Hussen, Hasanen Mohammed
Calautit, John Kaiser
Abd. Majid, Muhd. Zaimi
author_facet Nejat, Payam
Jomehzadeh, Fatemeh
Hussen, Hasanen Mohammed
Calautit, John Kaiser
Abd. Majid, Muhd. Zaimi
author_sort Nejat, Payam
title Application of wind as a renewable energy source for passive cooling through windcatchers integrated with wing walls
title_short Application of wind as a renewable energy source for passive cooling through windcatchers integrated with wing walls
title_full Application of wind as a renewable energy source for passive cooling through windcatchers integrated with wing walls
title_fullStr Application of wind as a renewable energy source for passive cooling through windcatchers integrated with wing walls
title_full_unstemmed Application of wind as a renewable energy source for passive cooling through windcatchers integrated with wing walls
title_sort application of wind as a renewable energy source for passive cooling through windcatchers integrated with wing walls
publisher MDPI AG
publishDate 2018
url http://eprints.utm.my/id/eprint/86583/1/PayamNejat2018_ApplicationofWindasaRenewableEnergySource.pdf
http://eprints.utm.my/id/eprint/86583/
http://dx.doi.org/10.3390/en11102536
_version_ 1680321067186388992
score 13.211869

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