Experimental investigation of attic heat gain reduction and indoor illuminance using a light-vent pipe

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Abstract

This research aims to investigate the potential of the light/ vent pipe, which is designed and integrated into the shed roof of the test house. The roof angle is 30 degrees. Two configurations of Light Vent Pipe (LVP) and Vent Pipe (VP) were manufactured by the aluminum sheet with silver surface treatment. Each pipe has 1.20 m of length and 15 cm in diameter. The LVP has a translucent flat cover with 15 cm of diameter. The results show that the LVP induced the natural airflow rate at about 1.8-5.4 m3/h and corresponded to the number of air change between 1-4 Air Change per Hour (ACH). The heat gain through the ceiling of LVP was reduced by 5 W/m2 at the percentage of heat gain reduction of 8-32%. The LVP provides indoor illuminance for about 50-150 Lx. The results showed reasonable agreements with experimental values of air velocity and corresponding to volume airflow rate ACH and heat gain reduction in the building.

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APA

Sungsoontorn, S., Nonthiworawong, D., Rattanadecho, P., & Prommas, R. (2019). Experimental investigation of attic heat gain reduction and indoor illuminance using a light-vent pipe. International Journal of Heat and Technology, 37(4), 1171–1179. https://doi.org/10.18280/ijht.370427

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