Utilization of a Glass Wall Curtain in the Ventilated Chimney to Reduce Temperature in Non-air Conditioned Room
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Abstract
The high temperature of the curtain surface and the warm air in the gap between the glass and the curtain flows into the room. This research studies utilization of the air gap for ventilation to reduce room temperature. The thermal performance of dim-out, blackout and aluminum-coat reflective curtains, are studied. The curtain was installed at 14 cm from the glass pane to perform an inner wall of the air gap. There were two openings, one at the top of the glass to let warm air flowing out of the air gap and one opening at the bottom of the curtain to let room air flowing into the air gap. The results of ventilated air gap were compared with the closed air gap. For a constant solar intensity of 600 W/m2, the results showed that the surface temperature of the curtains with ventilated air gap is lower than those with closed air gap by 2.2 - 5.4 °C. The surface temperature of aluminum-coat reflective curtains is lowest among three curtains. The surface temperatures of all curtains were 7.6 - 12.4 °C higher than room temperature because the hot air leaked through the cloth pores and flowed into the room. The typical curtain clothes with low thermal resistance affects the ventilation performance. Therefore, this research recommended insulation materials with thermal reflective coating on the outer surface for a widow curtain. The minimum thermal resistance of 0.94-1.0 °Cm2/ W was suggested to reduce room air temperature by 6 °C.
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