Impacts of partial greenery facade to indoor light illuminance and thermal

Abstract

This paper reported a research of facade greenery impacts to indoor light and thermal using two models. The first was without greenery as base case, and the other was with climbing ivy plants as greenery facade. Besides the indoor light illuminance, the air temperature and relative humidity (RH) were measured for thermal data. The experiments were done for west orientation, on dry season in March to April 2018 and for south orientation, on dry season on 14 to 22 November 2018. The result for west orientation, the facade with vegetation reduced more (31.18 to 51.71) % sunlight compared to facade without vegetation. The highest reduction was on 4.30 pm to 6.00 pm. For south orientation, the facade with vegetation reduced more (28.4 to 54.87) % sunlight compared to facade without vegetation. The highest reduction was on 05.15 am in the morning and 4.30 pm to 5.00 pm in the afternoon. Meanwhile, the indoor thermal impact was unsignificant, reduction for air temperature only (0.5 to 1) °C, and only 1 % reduction for the RH. For greenery facades, vegetation impacts to light were determined by its orientation, depth and surface area it covered, while for thermal impact, the bigger LAI was the better.