|Byncchainia||Дата: Воскресенье, 26.01.2014, 06:20 | Сообщение # 1|
|The largest uncertainties in estimating GHG emissions from buildings come from the differences between design assumptions and actual building use and energy use intensity/performance. These could easily be on the order of a factor of 2 if they differ too much. For existing buildings, making http://samosval.netau.net retrofit or operational decisions, those uncertainties are far smaller and then the accuracy of the calculation of GHG emissions from electricity production probably contains the next highest source of uncertainty, although I have no data to support that assertion.The time- and weather-dependent performance of the electric grid and of buildings requires an incredible amount of intensive manipulation of available data, some of which is of poor accuracy and low reliability. Matching historical data to the weather and time when the electricity was generate is non-trivial.