Design and testing of a novel building integrated cross axis wind turbine

The prospect of harnessing wind energy in urban areas is not promising owing to low wind speeds and the turbulence caused by surrounding obstacles. However, these challenges can be overcome through an improved design of wind turbine that can operate efficiently in an urban environment. This paper pr...

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Main Authors: Wen, Tong Chong, Mohammed Gwani, Chin Joo Tan, Wan Khairul Muzammil Abd Rahim, Sin, Chew Poh, Kok Hoe Wong
Format: Article
Language:English
Published: MDPI AG, Basel, Switzerland 2017
Subjects:
Online Access:https://eprints.ums.edu.my/id/eprint/19197/1/Design%20and%20testing%20of%20a%20novel%20building%20integrated%20cross%20axis%20wind%20turbine%20.pdf
https://eprints.ums.edu.my/id/eprint/19197/
https://doi.org/10.3390/app7030251
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spelling my.ums.eprints.191972018-03-22T02:08:09Z https://eprints.ums.edu.my/id/eprint/19197/ Design and testing of a novel building integrated cross axis wind turbine Wen, Tong Chong Mohammed Gwani Chin Joo Tan Wan Khairul Muzammil Abd Rahim Sin, Chew Poh Kok Hoe Wong TJ Mechanical engineering and machinery The prospect of harnessing wind energy in urban areas is not promising owing to low wind speeds and the turbulence caused by surrounding obstacles. However, these challenges can be overcome through an improved design of wind turbine that can operate efficiently in an urban environment. This paper presents a novel design of a building integrated cross axis wind turbine (CAWT) that can operate under dual wind direction, i.e., horizontal wind and vertical wind from the bottom of the turbine. The CAWT consists of six horizontal blades and three vertical blades for enhancing its self-starting behavior and overall performance. The study employed a mock-up building model with gable rooftop where both of the developed CAWT and the conventional straight-bladed vertical axis wind turbine (VAWT) are mounted and tested on the rooftop. The height of the CAWT and the VAWT above the rooftop was varied from 100 to 250 mm under the same experimental conditions. The results obtained from the experimental study showed that there is significant improvement in the coefficient of power (Cp) and self-starting behavior of the building integrated CAWT compared to the straight-bladed VAWT. At 100 mm height, the Cp,max value of the CAWT increased by 266%, i.e., from 0.0345 to 0.1263, at tip speed ratio (TSR) (λ) of 1.1 and at wind speed of 4.5 m/s. Similar improvements in performance are also observed for all condition of CAWT heights above the rooftop where the CAWT outperformed the straight-bladed VAWT by 196%, 136% and 71% at TSR of 1.16, 1.08, and 1.12 for Y = 150, 200, and 250 mm, respectively. Moreover, the CAWT performs better at 10° pitch angle of the horizontal blade compared to other pitch angles. MDPI AG, Basel, Switzerland 2017 Article PeerReviewed text en https://eprints.ums.edu.my/id/eprint/19197/1/Design%20and%20testing%20of%20a%20novel%20building%20integrated%20cross%20axis%20wind%20turbine%20.pdf Wen, Tong Chong and Mohammed Gwani and Chin Joo Tan and Wan Khairul Muzammil Abd Rahim and Sin, Chew Poh and Kok Hoe Wong (2017) Design and testing of a novel building integrated cross axis wind turbine. Applied Sciences, 7 (3). p. 251. ISSN 2076-3417 https://doi.org/10.3390/app7030251
institution Universiti Malaysia Sabah
building UMS Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Sabah
content_source UMS Institutional Repository
url_provider http://eprints.ums.edu.my/
language English
topic TJ Mechanical engineering and machinery
spellingShingle TJ Mechanical engineering and machinery
Wen, Tong Chong
Mohammed Gwani
Chin Joo Tan
Wan Khairul Muzammil Abd Rahim
Sin, Chew Poh
Kok Hoe Wong
Design and testing of a novel building integrated cross axis wind turbine
description The prospect of harnessing wind energy in urban areas is not promising owing to low wind speeds and the turbulence caused by surrounding obstacles. However, these challenges can be overcome through an improved design of wind turbine that can operate efficiently in an urban environment. This paper presents a novel design of a building integrated cross axis wind turbine (CAWT) that can operate under dual wind direction, i.e., horizontal wind and vertical wind from the bottom of the turbine. The CAWT consists of six horizontal blades and three vertical blades for enhancing its self-starting behavior and overall performance. The study employed a mock-up building model with gable rooftop where both of the developed CAWT and the conventional straight-bladed vertical axis wind turbine (VAWT) are mounted and tested on the rooftop. The height of the CAWT and the VAWT above the rooftop was varied from 100 to 250 mm under the same experimental conditions. The results obtained from the experimental study showed that there is significant improvement in the coefficient of power (Cp) and self-starting behavior of the building integrated CAWT compared to the straight-bladed VAWT. At 100 mm height, the Cp,max value of the CAWT increased by 266%, i.e., from 0.0345 to 0.1263, at tip speed ratio (TSR) (λ) of 1.1 and at wind speed of 4.5 m/s. Similar improvements in performance are also observed for all condition of CAWT heights above the rooftop where the CAWT outperformed the straight-bladed VAWT by 196%, 136% and 71% at TSR of 1.16, 1.08, and 1.12 for Y = 150, 200, and 250 mm, respectively. Moreover, the CAWT performs better at 10° pitch angle of the horizontal blade compared to other pitch angles.
format Article
author Wen, Tong Chong
Mohammed Gwani
Chin Joo Tan
Wan Khairul Muzammil Abd Rahim
Sin, Chew Poh
Kok Hoe Wong
author_facet Wen, Tong Chong
Mohammed Gwani
Chin Joo Tan
Wan Khairul Muzammil Abd Rahim
Sin, Chew Poh
Kok Hoe Wong
author_sort Wen, Tong Chong
title Design and testing of a novel building integrated cross axis wind turbine
title_short Design and testing of a novel building integrated cross axis wind turbine
title_full Design and testing of a novel building integrated cross axis wind turbine
title_fullStr Design and testing of a novel building integrated cross axis wind turbine
title_full_unstemmed Design and testing of a novel building integrated cross axis wind turbine
title_sort design and testing of a novel building integrated cross axis wind turbine
publisher MDPI AG, Basel, Switzerland
publishDate 2017
url https://eprints.ums.edu.my/id/eprint/19197/1/Design%20and%20testing%20of%20a%20novel%20building%20integrated%20cross%20axis%20wind%20turbine%20.pdf
https://eprints.ums.edu.my/id/eprint/19197/
https://doi.org/10.3390/app7030251
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score 13.211869