Otimização Multiobjetiva do Desempenho Termoenergético da Envoltória de Contêiner para Uso como Edificação Militar

Abstract

In terms of sustainability, there is great concern about reducing the use of materials and the generation of civil construction waste, and in terms of energy efficiency, there is concern about reducing energy consumption without affecting user comfort. In order to promote the reuse of maritime containers for construction, and joining these two items, the objective of the work is to analyze the thermoenergy performance of containers, for military use, with different constructive configurations, by computer simulation, using optimization methods. The research covers aspects of contracting to bid for military use, considering some locations in Brazil, considering several variables through optimized simulation of the envelope, with thermal performance and energy efficiency criteria. For this, a container was modeled using the EnergyPlus software, with adaptations proposed by authors and regulations, considering climatic data from INMET and configurations from INI-C (INMETRO, 2021). For the parameterization of variables, jEPlus was used, and for the optimization process, sensitivity analysis by the Morris method and NSGA-II algorithm were used, both in the jEPlus+EA software. The effects of the following independent variables were analyzed in two different climate conditions in Brazil: orientation to the North axis; solar absorptance of the roof and walls; thickness of thermal insulation of the walls; type of window glass; container height; window area; window shading and thermostat setpoint. Through the sensitivity analysis, it can be seen that the parameters vary according to the location of implementation. The parameters that presented lower significance simultaneously for the two cities were removed from the optimization analysis: orientation in relation to the North axis, glass transmittance and height of the container. The results showed that the configurations for the best objectives in each city were different and this exposes the concern that one cannot use a container designed for one city in another city without first performing thermoenergy analysis.