Browse by author
Lookup NU author(s): Dr Haoyu HuangORCiD
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
Building energy consumption in the severe cold regions of China is an important consideration in building energy conservation because of the high amount of energy consumed by heating. As an important thermal parameter, the thermal transmittance (U-value) of building envelopes can directly affect the operational energy consumption of buildings. Understanding the U-values of buildings in severe cold regions is important to predict building energy accurately. However, the U-values of envelopes fluctuate constantly due to environmental impacts. Therefore, this study aimed to examine the influence of dynamic U-values on building energy efficiency. To achieve this, this study focused on the in-situ measurement of the U-values of two typical building envelopes in Harbin from winter to summer in 2023 to determine the average and dynamic U-values of the tested envelope, comprising a brick envelope and reinforced concrete (RC) envelope. The building energy simulation results based on theoretical U-values were compared with the measured average and dynamic U-values of the tested envelopes. The findings revealed that the fluctuations in the U-values were significant. In the dynamic U-values of tested brick and RC envelopes, the U-values in winter were 159.8% and 30.8% higher than those in summer, respectively. Furthermore, the dynamic U-values significantly influenced heating energy consumption, with an increase of up to 15.9%.
Author(s): Yu J, Chang W-S, Zhang R, Dong Y, Huang H, Wang T-H
Publication type: Article
Publication status: Published
Journal: Energy and Buildings
Year: 2024
Volume: 324
Print publication date: 01/12/2024
Online publication date: 22/10/2024
Acceptance date: 20/10/2024
Date deposited: 29/10/2024
ISSN (print): 0378-7788
ISSN (electronic): 1872-6178
Publisher: Elsevier BV
URL: https://doi.org/10.1016/j.enbuild.2024.114947
DOI: 10.1016/j.enbuild.2024.114947
ePrints DOI: 10.57711/hnk6-7b44
Data Access Statement: Data will be made available on request.
Altmetrics provided by Altmetric
