The description of the evaluation methods of the Brazilian energy efficiency regulations for buildings is presented in two papers. The first part presents and discusses the prescriptive method. The second part deals with the simulation method and its use, and discusses issues related to the simulation of the performance of air-conditioned buildings in particular, but also of naturally ventilated buildings, focusing on the surroundings of the air-conditioned building and the use of daylight. An existing building was simulated based on the method of the Technical Regulations for Energy Efficiency Labelling of Commercial Buildings (RTQ-C) in Brazil, with and without surrounding shading, and with and without brise soleil. Its reference model was also simulated with and without surrounding shading. The results of annual electricity consumption were compared in order to assess the savings potential of each model in relation to the two reference models. The results of the two reference models were also discussed, explaining why the reference model should not have surrounding shading for simulation, according to the RTQ-C.
Energy efficiency; Labelling; Simulation