Augmentation of Natural Convection of Vertical Plate using Corona Wind
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Abstract
This research investigated the high voltage on natural convection of a vertical flat plate from 5, 6, 7, 8, 9 and 10 kV. The experiment was carried out on a constant heat flux surface in the test section of 1 m width x 1 m length x 1.5 m height. The discharge electrode was installed inside the test section. The discharge electrode is perpendicular to the vertical plate with a distance of 1 cm. Two positions are considered: the center of plate, which corresponds to discharge electrode (position A) and the position above the first position of 2 cm (position B). The effect of high voltage and positions on the plate are considered to enhance heat transfer efficiency. The results show that high voltage of 10 kV can increase the heat transfer enhancement ratio up to 1.06 and 1.03 at position A and B, respectively. The heat transfer efficiency decreases with the decrease of the high voltage. In addition, an accurately predictive formula for the Nussult number under 5-10 kV is also proposed in this paper. Therefore, the obtained experimental results will be important information in order to develop the higher efficiency heat exchangers in the future.
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ลิขสิทธ์ ของมหาวิทยาลัยเทคโนโลยีราชมงคลพระนครReferences
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