A INFLUÊNCIA DA TRANSMITÂNCIA TÉRMICA DE SUPERFÍCIES OPACAS NO DESEMPENHO DE UM EDIFÍCIO NATURALMENTE VENTILADO COM ALTA OCUPAÇÃO

Abstract

This work aims to evaluate the impact of the external opaque surface of a naturally ventilated and high thermal load building on the thermal performance of these spaces. As a method, a case study was used to evaluate a public University Education building in the city of Campinas, SP. A part of the building could be modeled in the thermal energy computational simulation software, EnergyPlus and, afterwards, five cases were created varying the external walls. The types of sealing chosen were: 10cm solid concrete; apparent concrete block (real case); plastered ceramic brick; double façade (external ceramic coating); double façade with insulation in the air chamber. The results proved that the wall with the lowest transmittance (U = 0.71) showed the highest thermal gain within the space analyzed for the Campinas climate. This could be explained due to the high occupancy density and poor ventilation in the room. The use of night ventilation can be a strategy to improve heat discomfort in these types of spaces. The work suggests that, in future standards, maximum and minimum limits for the transmittance of the walls are established, depending on the use and type of ventilation.