建筑能耗占世界一次能源总消耗量的三分之一。随着人们对建筑节能意识的提高，高性能建筑（HPB）在世界范围内迅速发展，各种性能评级和认证系统得到广泛推广和采用。研究HPB的实际能源性能并了解其影响因素是很有价值的。为了阐明这一主题，本文基于全球51座高性能办公楼的数据库进行了一系列投资组合分析。分析表明，51栋建筑的实际现场能源使用强度（EUI）的变化系数高达11，表明当前HPB的实际能源性能存在较大差异。 进一步分析EUI与气候之间的相关性，阐明了EUI在所有气候区分散的普遍现象，这意味着天气虽然重要，但不是单个建筑实际能耗的决定性因素。通过EUI的建筑规模分析显示，较小的建筑有降低能耗的趋势。即便如此，这种相关性也不是绝对的，因为一些大型建筑的能耗较低，而一些小型建筑的能耗则相反。在技术方面，统计数据表明，某些技术的应用与特定的建筑尺寸和气候特征有关。 然而，仍然很难找到一套与一组低EUI建筑直接相关的技术。得出的结论是，没有一个单一因素从本质上决定HPBs的实际能源性能。为提供节能建筑，应实施综合设计，考虑气候、技术、居住行为以及运行和维护。引文:ASHRAE论文CD:2014 ASHRAE年会，华盛顿州西雅图

Energy consumed by buildings accounts for one third of the world's total primary energy use. Associated with the conscious of energy savings in buildings, High Performance Buildings (HPBs) has surged across the world, with wide promotion and adoption of various performance rating and certification systems. It is valuable to look into the actual energy performance of HPBs and to understand their influencing factors.To shed some light on this topic, this paper conducted a series of portfolio analysis based on a database of 51 high performance office buildings across the world. Analyses showed that the actual site Energy Use Intensity (EUI) of the 51 buildings varied by a factor of up to 11, indicating a large scale of variation of the actual energy performance of the current HPBs. Further analysis of the correlation between EUI and climate elucidated ubiquitous phenomenon of EUI scatter throughout all climate zones, implying that the weather is not a decisive factor, although important, for the actual energy consumption of an individual building. On the building size via EUI, analysis disclosed that smaller buildings have a tendency to achieving lower energy use. Even so, the correlation is not absolute since some large buildings demonstrated low energy use while some small buildings performed opposite. Concerning the technologies, statistics indicated that the application of some technologies had correlations with some specific building size and climate characteristic. However, it was still hard to pinpoint a set of technologies which was directly correlative with a group of low EUI buildings.It is concluded that no a single factor essentially determines the actual energy performance of HPBs. To deliver energy-efficient buildings, an integrated design taking account of climate, technology, occupant behavior as well as operation and maintenance should be implemented.