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| Performance Testing and Comparision of A Turbine Ventilator, A Vent Column, and Their Combination under Thermal Buoyancy and Wind Effects
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Full
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Source |
International Journal of Engineering (IJE) |
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Table of Contents |
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Complete Issue PDF(2.41MB) |
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Volume: 6 Issue: 2 |
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Pages: |
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Publication
Date: April 2012 |
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ISSN
(Online): 1985-2312 |
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Pages |
86 - 95 |
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Author(s) |
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Published
Date |
16-04-2012 |
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Publisher |
CSC
Journals, Kuala Lumpur,
Malaysia |
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ADDITIONAL
INFORMATION |
| Keywords Abstract References Cited by Related Articles Collaborative
Colleague |
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KEYWORDS: Natural Ventilation, Wind Effects, Thermal Buoyancy Effects, Turbine Ventilator, Vent Column, Turbine-column Combined Device |
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| Ventilation performance of a curved-blade turbine ventilator, a straight column covered with a flat hat, and a device of their combination of the same material and throat diameter of 21cm were tested on a room model of 3.0m long, 1.5m wide, and 3.0m high under simulated external wind and/or internal heat source. The wind speed was from 0m/s to 3.6m/s. The heat flux was up to 3KW. Air speed through each device was measured and plotted as functions of both the wind speed and the heat flux. The results show that when buoyancy effects were dominant, i.e. internal heat source under low wind speed, the column performed best, followed by the combined device and lastly the turbine. When wind effects were dominant, the combined device worked best, followed by the turbine which was close to the column. Performance of the column was seen to suffer from the external wind while that of the turbine and the combined device benefits from it. Performance of the combined device was found to be better than that of the turbine due to stack effects gained by an increased throat height compared to the turbine’s. This observation suggests a simple modification to boost performance of current commercial low-throat turbine ventilators. |
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| 1 |
H. Awbi. Ventilation of buildings. London and New York: Spon Press, 2003
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| 2 |
D.W. Etheridge. “Nondimensional methods for natural ventilation design”. Building and environment, vol. 37, pp. 1057-1072, 2002.
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N. Khan, Y. Su, S. B. Riffat. “A review on wind driven ventilation techniques”, Energy and Buildings, vol. 40, pp. 1586-1604, 2008 (a).
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N. Khan, S. Su, S.B. Riffat, C. Biggs. “Performance testing and comparison of turbine ventilators”. Renewable Energy, vol. 33, pp. 2441-2447, 2008 (b).
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C.M. Lai. “Experiments on the ventilation efficiency of turbine ventilators used for building and factory ventilation”. Energy and Buildings, vol. 35, pp. 927-932, 2003.
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C.M. Lai. “Prototype development of rooftop turbine ventilator powered by hybrid wind and photovoltaic energy”. Energy and Buildings, vol. 38, pp. 174-180, 2006.
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P. F. Linden. “The fluid mechanics of natural ventilation”. Annual review of fluid mechanics, vol. 31, pp. 201-238, 1999.
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| 8 |
A. Revel, B.P. Huynh. “Characterizing roof ventilators”. Presented at 15th Australasian Fluid Mechanics Conference, The University of Sydney, Sydney, Australia, 2004.
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| Nguyen Q. Y : Colleagues
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| Nguyen T. Bay : Colleagues
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| Ha Phuong : Colleagues
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