Performance of Greenery Systems in Zero Energy Building of Singapore

Aiming to be "City in a Garden", greenery systems are widely developed to be integrated into buildings in Singapore. Zero Energy Building of Singapore as a test bed for several green building technologies also tested the greenery systems. Vertical greenery systems and extensive rooftop greenery systems were installed and the thermal performance was being monitored. The paper discussed on the performance of the greenery systems in reducing heat gain into the building and cooling down the ambient air temperature. The study was conducted by field measurement of the surface temperature and the ambient air temperature. The study showed that there was significant reduction on the surface temperature of the wall/ roof being shaded by the greenery systems up to 11°C for the vertical greenery on the west façade, 6.6°C for the vertical greenery on the south façade and 24.5°C for the rooftop greenery; and on the ambient air temperature at 300mm away from the external bare wall/roof and greenery of up to 3°C for the west facing vertical greenery, 2°C for the south facing vertical greenery and 7°C for the rooftop greenery.