The international cooperation project IEA SHC Task 40 / ECBCS Annex 52 “Towards Net Zero Energy Solar Buildings”, attempts to develop a common understanding and to set up the basis for an international definition framework of Net Zero Energy Buildings (Net ZEBs). The understanding of such buildings and how the Net ZEB status should be calculated differs in most countries. This paper presents an overview of Net ZEBs energy calculation methodologies proposed by organisations representing eight different countries: Austria, Canada, Denmark, Germany, Italy, Norway, Switzerland and the USA. The different parameters used in the calculations are discussed and the various renewable supply options considered in the methodologies are summarised graphically. Thus, the paper helps to understand different existing approaches to calculate energy balance in Net ZEBs, highlights the importance of variables selection and identify possible renewable energy supply options which may be considered in calculations. Finally, the gap between the methodology proposed by each organisation and their respective national building code is assessed; providing an overview of the possible changes building codes will need to undergo in the coming years.
|Title of host publication||Proceedings of EuroSun 2010 : International Conference on Solar Heating, Cooling and Buildings : 28 September - 1 October 2010, Graz, Austria|
|Number of pages||8|
|Publication status||Published - 2010|
|Event||International Conference on Solar Heating, Cooling and Buildings (EuroSun 2010) - Graz, Austria|
Duration: 28 Sep 2010 → 1 Oct 2010
|Conference||International Conference on Solar Heating, Cooling and Buildings (EuroSun 2010)|
|Period||28/09/2010 → 01/10/2010|