Conventionally in building performance simulations (BPS), it is assumed that air entering outdoor HVAC equipment is at the outdoor ‘ambient’ temperature, obtained from a weather file. However, significant spatial variations exist in outdoor air temperature fields, especially within the thermal boundary layers that form near exposed surfaces like roofs.
The buildings sector is responsible for approximately 23% of Australia’s carbon emissions. The Australian Sustainable Built Environment Council (ASBEC), the peak body for sustainability in the built environment, has identified that improving the minimum standards for energy efficiency of new buildings can assist in delivering carbon emissions reductions.
Cool roof technology is known to reduce the cooling energy consumption of conditioned buildings during hot periods, and widespread implementation of such roofs in a neighbourhood or precinct can mitigate the urban heat island effect.
This report is the Interim Technical Report for the Building Code Energy Performance Trajectory Project. It accompanies the Interim Synthesis Report for the Building Code Energy Performance Trajectory Project, entitled The Bottom Line – the household impacts of delaying improved energy requirements in the Building Code and which was published on the 8th of February 2018, providing more detail on the assumptions behind and the preliminary results from the underlying modelling work.
The report provides the following key items: