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Energy simulation - BCA Section J - DTS
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Alternative Solution (JV3) - Thermal bridges
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Climate change informationInformation about Australia's past, current and future climate helps industries, governments and communities plan for and adapt to a variable and changing climate. |
The chalengeChanges to the climate system have occurred and are likely to continue. The international scientific community accepts that increases in greenhouse gases due to human activity have been the dominant cause of observed global warming since the mid-20th century. Continued emissions of greenhouse gases will cause further warming and changes in all components of the climate system. Australia's changing climate represents a significant challenge to individuals, communities, governments, businesses, industry and the environment. Australia has already experienced increases in average temperatures over the past 60 years, with more frequent hot weather, fewer cold days, shifting rainfall patterns and rising sea levels. More of the same is expected in the future. |
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Our responseThe most comprehensive climate projections for Australia We worked with the Australian Bureau of Meteorology to produce the most comprehensive set of climate change projections for Australia ever released. Map of the eight regions or clusters for which climate change information has been assessed The projections are presented for eight distinct regions of Australia, each of which will be affected differently by climate change. The projections are based on data from up to 40 global climate models, developed by institutions around the world, that were driven by four greenhouse gas and aerosol emissions scenarios. Results have been prepared for 21 climate variables (both on the land and in the ocean) and for four 20-year time periods (centred on 2030, 2050, 2070 and 2090). |
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BCA Section J- Alternative Solution (JV3) |
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To comply with Section J of the NCC 2019, one of the following compliance paths can be pursued:
Compliance with DTS provisions is achieved when the building design meets minimum section J requirements outlined in BCA. |
National Construction Code |
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On the other hand, compliance with an alternative Solution applies when a building's design does not meet DTS provisions, or when a more economical solution is available. To show compliance with an alternative solution, the JV3 Verification method outlined in the BCA is used to model a building's annual energy consumption against its energy consumption complied with DTS provisions. To do JV3 modelling, a reference building model that meets DTS provisions is created and its annual energy consumption is compared against the proposed model's annual energy consumption. As outlined in the BCA, compliance with JV3 verification method is met when the proposed building's annual energy consumption is less than or equal to the reference building's annual energy consumption. JV3 allows more flexibility to design a development meeting energy efficiency requirement by looking at building's facade and services in more details as long as its energy usage does not exceed the reference buildings energy usage targets. |
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JV3 Verification using a reference buildingA building, including its services, must have features that facilitate the efficient use of energy appropriate to:
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