Performance Assessment of the Overall Building Envelope Thermal Performance-Building Envelope Performance(BEP)Metric  

作　　者：Simon Pallin Carl-Eric Hagentoft Antonio J.Aldykiewicz,Jr. Jason W.DeGraw Mahabir Bhandari 

机构地区：[1]Building Envelope&Urban Systems Research Group,Oak Ridge National Laboratory,Energy and Transportation Division,1 Bethel Valley Rd,Oak Ridge,TN 37830,USA [2]Department of Architecture and Civil Engineering,Division of Building Technology,Chalmers University of Technology,Chalmersplatsen 4,Gothenburg 41296,Sweden

出　　处：《Journal of Civil Engineering and Architecture》2021年第6期300-317,共18页土木工程与建筑（英文版）

基　　金：This manuscript has been authored by UT-Battelle LLC under contract DE-AC05-00OR22725 with the US DOE(Department of Energy).

摘　　要：Today,to describe the thermal performance of the building envelope and its components we use a variation of metrics;such as,R-value,ACH(air exchange rate per hour),SHGC(solar heat gain coefficient)of windows,U-factor etc.None of these performance indicators is meant to represent the overall thermal performance.In this paper,such a metric is introduced,the BEP(building envelope performance)value.Unlike the thermal resistance,typically expressed as an R-value,the BEP-value considers additional elements of heat transfer that affect the energy demand of the building because of exterior and interior(solar)thermal loads:conductive and radiant heat transfer,and air infiltration.To demonstrate BEP’s utility,validation studies were carried out by comparing the BEP-value to theoretical results using whole building energy simulation tools such as EnergyPlus and WUFI Plus.Results show that BEP calculations are comparable to calculations made using these simulation tools and that unlike other similar metrics,the BEP-value accounts for all heat transfer mechanisms that are relevant for the overall energy performance of the building envelope.The BEP-value thus allows comparing envelopes of buildings with different use types in a fair and realistic manner.

关 键 词：Building enclosure energy R-VALUE EUI(energy use intensity) AIRTIGHTNESS building envelope campaign. 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]