GREEN FACADE ENERGY BALANCE IN A LOW COST HOUSE IN SUBTROPICAL CLIMATE
DOI:
https://doi.org/10.46421/encac.v17i1.3778Keywords:
energy efficiency, thermal comfort, energetic balanceAbstract
Worldwide, green infrastructure is increasingly used to mitigate the impacts of dense urban areas, helping to naturalize the built environment. This study evaluated a full-scale prototype of a vertical greenery system (vegetated wall) to evaluate the thermal performance of a low-cost housing located in a humid subtropical climate. A vegetated wall (VW) was built with Wisteria floribunda plant species, shading the house’s west wall. An adjacent bare wall (BW) was also monitored, allowing to verify the thermal difference between the VW and the BW. The thermal behavior was evaluated in different climatic scenarios of summer and winter days. To point out the influence of plants, a comparison was made between the microclimatic conditions and the energy transfer in the two walls. Experimental data referring to the surface temperature of the walls, the air layer of the VW and the external air temperatures were used as input for the mathematical model and to evaluate the heat fluxes. During the day, the VW reduced the surface temperature of the wall by up to 8.4 °C. Analysis of the heat flux through the two walls showed a significant reduction in the VW, equal to 99% during the day. Conduction, shortwave and longwave fluxes were generally lower on the VW. The results of this work contribute to the knowledge of the effects provided by plants in terms of cooling and heating, influence on microclimatic conditions of proximity and global transfer of energy.
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