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Energies 2018, 11(5), 1100; https://doi.org/10.3390/en11051100

Investigation of Airflow Patterns in a New Design of Wind Tower with a Wetted Surface

Department of Earth and Environmental Sciences, University of Waterloo, Waterloo, ON, N2L 3G1, Canada
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Received: 26 March 2018 / Revised: 19 April 2018 / Accepted: 27 April 2018 / Published: 30 April 2018
(This article belongs to the Special Issue Building Energy Use: Modeling and Analysis)

Abstract

Passive cooling systems, such as wind towers, can help to reduce energy consumption in buildings and at the same time reduce greenhouse gas (GHG) emissions. Wind towers can naturally ventilate buildings and also can create enhanced thermal comfort for occupants during the warm months. This study proposes a modern wind tower design with a moistened pad. The new design includes a fixed column, a rotating and movable head, an air opening with a screen, and two windows at the end of the column. The wind tower can be installed on roof-tops to take advantage of ambient airflow. The wind tower’s head can be controlled manually or automatically to capture optimum wind velocity based on desired thermal condition. To maximize its performance, a small pump was considered to circulate and spray water on an evaporative cooling pad. A computational fluid dynamics (CFD) simulation of airflow around and inside the proposed wind tower is conducted to analyze the ventilation performance of this new design of wind tower. Thereby, the velocity, total pressure, and pressure coefficient distributions around and within the wind tower for different wind velocities are examined. The simulation results illustrate that the new wind tower design with a moistened pad can be a reasonable solution to improve naturally the thermal comfort of buildings in hot and dry climates. View Full-Text
Keywords: energy; wind tower; greenhouse gas (GHG) emissions; natural ventilation; passive cooling systems; computational fluid dynamics (CFD) energy; wind tower; greenhouse gas (GHG) emissions; natural ventilation; passive cooling systems; computational fluid dynamics (CFD)
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Soltani, M.; Dehghani-Sanij, A.; Sayadnia, A.; Kashkooli, F.M.; Gharali, K.; Mahbaz, S.; Dusseault, M.B. Investigation of Airflow Patterns in a New Design of Wind Tower with a Wetted Surface. Energies 2018, 11, 1100.

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