Análise do desempenho termoenergético das edificações do Parque Científico e Tecnológico do Pampa (Pampatec) através de simulação com software energyplus

Abstract

This work aims to evaluate the thermoenergy performance of the buildings that constitute the Pampa Scientific and Technological Park (PampaTec), located at Tiarajú avenue - Projetado, Alegrete - RS. The study carried out in this work aims to propose physical improvements and in the refrigeration system, aiming to improve the thermal comfort of the occupants of the buildings together with a reduction in the consumption of electric energy. The tool used to perform the simulations and to evaluate the thermal energy performance of PampaTec is EnergyPlus software, version 8.6. The simulations are carried out using 14 design days, according to ASHRAE (2013) together with annual climatic design conditions for Alegrete. PampaTec buildings’ environments are divided into 24 thermal zones, 8 zones related to the Left Building, 6 to the Administrative Building and 10 for the Right Building. The delimitation of each thermal zone is declared in the program by surfaces composed of the materials described into PampaTec’s architectural design, resulting in 211 heat transfer surfaces divided between walls, doors and windows. Four different types of glass films are simulated in the building windows as well as the LED lighting as a replacement for the fluorescent in order to evaluate the influence of these changes in the demand of cooling power of the environments and in the electrical power consumption. After that, air conditioning units cooling capacity are selected to provide thermal comfort in each of the analyzed environments, keeping the same air conditioning system currently installed (split). The evaluation of the thermal comfort is given through representative parameters, such as operating temperature, zone mean air temperature and relative air humidity, where it is aimed to adapt the environments to the comfort parameters proposed by ASHRAE (2005). By concluding the analyzes, it was observed that using the proposed Dark Gray films reduced PampaTec’s cooling system demand by 22.3%. While the LED lighting proposal reduced the demand for cooling capacity by 4.4% and electricity consumption by 14.3% per year. Lastly, the air conditioning units cooling capacity simulated were able to meet the parameters of thermal comfort (relative air humidity and mean air temperature of the zone) and also reduced electrical power consumption by 23.3% compared to the currently air conditioning unit cooling capacity installed.