Experimental investigation of new designs of wind towers

Abstract

Two new designs of wind towers were tested side by side with a conventional wind tower in the city of Yazd, Iran. All the towers were of identical dimensions. The two new designs were one with wetted column, consisting of wetted curtains hung in the tower column, and the other one with wetted surfaces, consisting of wetted evaporative cooling pads mounted at its entrance. The air temperature leaving the wind towers with evaporative cooling provisions were much lower than the air temperature leaving the conventional design, and its relative humidity much higher. The air-flow rate was reduced slightly in these new towers. It was found that the wind tower with wetted column performs better with high wind speeds whereas the tower with wetted surfaces performs better with low wind speeds. It is recommended that these new designs of wind towers should be manufactured in different sizes and incorporated in the designs of new buildings. They can replace the evaporative coolers currently employed in Iran, and other hot arid regions, with considerable saving in electrical energy consumption. r

Evaluation of a two-sided windcatcher integrated with wing wall (as a new design) and comparison with a conventional windcatcher

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Anti-short-circuit device: A new solution for short-circuiting in windcatcher and improvement of natural ventilation performance

“…Bahadori et al [12] stated that the main benefit of windcatcher, like other passive technologies, is that it exploits wind renewable energy for their operation so they are considerably cost effective and more healthier. In addition to improving human comfort, they have low maintenance cost due to having no moving parts, capturing and supplying clean and fresh air at roof level compared to low level windows [13].…”

Performance Evaluation of Four-Sided Square Wind Catchers with Different Geometries by Numerical Method

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