AVALIAÇÃO DE DESEMPENHO TÉRMICO DA ENVOLTÓRIA DE RESIDÊNCIA UNIFAMILIAR

Abstract

A building envelope with high thermal performance for a certain type of climate is necessary to reduce the use of mechanical air conditioning without affecting the thermal comfort of users. This paper used as a case study a residence located in the tropical climate (type Cwa) of the city of Campinas-SP. The original design considered the use of a constructive system (walls and slab) in cross laminated timber (CLT), roof in insulated metal tiles and glazing with low solar heat gain coefficient (SHGC: 0.26). Computer simulations using the EnergyPlus software were performed considering four other scenarios of different envelope materials, commonly used in local residential construction: exterior walls in ceramic blocks and concrete slab and roof in ceramic tiles, single-glazed with clear glass and white coating on exterior walls. The results demonstrated the high thermal performance of the ceramic block with concrete slab system, when compared to the CLT system, reducing the need for cooling per year by 40%. The ceramic roof tile and the insulated metal tiles presented similar thermal behavior and the white coating presented low influence on the thermal performance of the case study. The single-glazed with clear glass demonstrated the lowest performance of this study, overcoming the thermal comfort zone limit of the adaptive model of ASHRAE 55 (2017) by 9.4 °C, showing the necessity of exterior solar protection.