Sensibility Analysis of the Brazilian Standards for Energy Efficiency Regarding the Variation of Internal Load Density in Office Buildings in Brazilian Bioclimatic Zones 1 and 7
The RTQ C (Technical Requirements of Quality for the Energy Performance Level of Commercial Buildings) publication classified the buildings in five efficiency levels. In RTQ C, the evaluation can be done with two methods: a prescriptive method and a simulation one. This paper aims to identify the sensibility of the prescriptive method RTQ C regarding the variation of equipment internal load density in office buildings in bioclimatic Zones 1 and 7 of the Brazilian bioclimatic zoning. The research results show that the building with walls and roof configured to meet specific prerequisites for energy efficiency Levels B and C had a lower consumption than buildings that meet the prerequisites to Level A. The study also showed that buildings with high internal load density of equipment, maximum shape factor and high, with walls and roofs with higher thermal transmittance, have lower power consumption than constructions with an envelope with greater thermal resistance. The increase in internal load density causes an increase in the internal heat generated by the large amount of equipment. In buildings with higher thermal insulation (Level A) the internal heat is maintained in the environment, causing overheating and the need for an air conditioning system.