Utilização de cobertura vegetal vertical como estratégia de climatização passiva em edificações

Abstract

The use of vertical vegetation cover, for the strategic benefit of thermal comfort and passive air conditioning, is an excellent architectural alternative. In the present research, the effect of the green wall in relation to thermal comfort was evaluated by means of a reduced scale reproduction, with two constructive models of buildings: steel frame and ceramic block, both with and without the use of the green wall. Indoor air temperature and relative humidity parameters were monitored through the use of SNOFF TH16 model sensors, and the outdoor temperature data were collected from a meteorological source, made available by the University Center School Farm- FAG. As an evaluation of the collected data, the device was calibrated by the comparison method performed on the sensor, used in previous experiments, which was kept as a reference base. For the experiment, two species of vegetation were used: Tradescantia zebrina – purple lambari and Asparagus densiflorus – Asparagus, previously cultivated in floriculture, to promote proper shading. The vertical vegetation cover system is composed of a plastic support that houses the rooted plants under substrate, which contains earth with humus, expanded clay and substrate, with a manual irrigation system. In this way, it was possible to evaluate the behavior of each building model against the use of the green wall, monitored for a period of eleven months, and evaluated the four seasons of the year. Data were recorded daily, by the eWeLink application, every two hours, between 6 am and 12 am. The vertical vegetation cover can be used as a passive climate control strategy in buildings, as the temperature difference of 1ºC, lower, was obtained in the module with green cover in relation to the module without cover, being the steel frame material, showing a more expressive result.