The effect of a novel roof pond to the indoor air temperature for passive cooling

The effect of a new passive cooling device to the indoor air is analyzed based both to experimental and simulating results. The tested device is a ventilated pond protected with an aluminum layer, placed on the roof of the examined building. The indoor air temperature of the building has been recorded, before and after the placement of the roof cooling technique. The record indoor air temperature is analyzed, in regard to the ambient conditions. Furthermore, the record indoor air temperature before the application of roof cooling technique has been assessed in order to create the digital model of the building, using the TRNSYS software. The climatic data of the experimental period are applied to the simulating model, in order to estimate the indoor air temperature that the building would have without the tested roof cooling technique. According to the simulation, the daily indoor air temperature fluctuation for the building without any roof treatment varies from 4.8 to 8.2oC, while the corresponding values after the application of the Ventilated pond with Aluminum layer are significantly reduced, varying from 1.6 to 3.1oC.