Assessing cooling energy reduction potentials by retrofitting traditional cavity walls into passively ventilated cavity walls

作     者：Ri Na Zhigang Shen Ri Na;Zhigang Shen

作者机构：Department of Civil and Environmental EngineeringUniversity of DelawareNewarkDE19716USA The Durham School of Architecture Engineering and ConstructionUniversity of Nebraska LincolnLincolnNE68588USA 

出 版 物：《Building Simulation》 (建筑模拟（英文）)

年 卷 期：2021年第14卷第4期

页      面：1295-1309页

核心收录：

学科分类：08[工学] 081404[工学-供热、供燃气、通风及空调工程] 0814[工学-土木工程] 

主　　题：low-cost energy retrofit building envelope cavity wall stack effect space cooling energy reduction CFD 

摘      要：A major roadblock in achieving substantial building energy reduction is the low performance of old buildings that account for a significant portion of the building energy *** low-cost energy retrofit solutions that do not disrupt occupants’daily life during the retrofitting is the key to successful building energy retrofit *** this paper,a novel and low-cost exterior wall retrofitting solution is introduced,and its performance in reducing space cooling load was quantitatively evaluated to demonstrate its feasibility and *** primary goal of this paper is to provide a quantitative assessment of the cooling-energy savings potential by using the proposed new wall *** intended retrofitting targets are the large amount of existing cavity-wall buildings located in hot climate *** quantification of the before-after heat-flux reduction was conducted through a 3-dimensional steady-state low turbulence computational fluid dynamics(CFD)model,which is validated by benchmarking its prediction against the published experimental case *** outcomes of the investigation suggest that this simple low-cost solution has great potentials in reducing buildings’summer cooling load in hot climate *** applicability of this solution is not limited to retrofitting existing *** energy-efficient building designs can also adopt this solution in their envelope systems.