Análise comparativa da eficiência do isolamento térmico em protótipos feitos com blocos de concreto

Abstract

Large companies as well as their customers are increasingly seeking comfort and quality of life. When we think of comfort, we immediately think of the thermal comfort that the environment will provide us. These places must present suitable thermal conditions for human comfort, as described in the technical standard for building performance, NBR 15575 (ABNT, 2013). This study was developed with the aim of analyzing the thermal performance among concrete blocks filled with sand, polystyrene, and only hollow block. Initially, calculations were carried out using NBR 15220-2 (ABNT, 2005) to determine their thermal resistance, transmittance, and thermal delays. Subsequently, internal temperature measurements were taken using temperature and humidity sensors configured through Arduino, a microcontroller responsible for executing programs and evaluating the quality of inputs and outputs. However, due to setbacks during the research, it was not feasible to perform continuous measurements. In response to this, a thermo-hygrometer was chosen for use during a 30-day period in each stage of the experiment. These measurements were taken at four different times throughout the day, with the aim of analyzing which prototype had the lowest internal temperature, thus favoring greater thermal comfort. According to the calculations, it was observed that, due to classification in bioclimatic zone 6, as specified by standard NBR 15520-3 (ABNT, 2005), the prototypes did not meet the requirements for transmittance, resistance, and thermal delay, which demand lower values compared to other regions. However, the measurements conducted demonstrated their relevance, as the prototypes remained within the temperature range considered favorable, as described in the literature and in the international regulatory standard. Among the prototypes evaluated, prototype 2 stood out for providing greater thermal comfort most of the time.