Evaluation of Thermal Bridging Effect Modeling Method in Building Energy Simulation Using DesignBuilder Program

Bo-Hye Choi; Seung-Yeong Song

doi:10.22696/jkiaebs.20240014

All Issue

2024 Vol.18, Issue 2 Preview Page

Research Article

Evaluation of Thermal Bridging Effect Modeling Method in Building Energy Simulation Using DesignBuilder Program DesignBuilder 프로그램을 이용한 건물에너지 해석에서 열교 영향 모델링 방법 평가

30 April 2024. pp. 152-164

PDF XML

Abstract

The purpose of this study was to compare of results according to thermal bridging modeling method in building energy simulation using DesignBuilder program. To model the thermal bridging effect in the DesignBuilder program, the effective U-factor and the heat transfer coefficient through linear and point thermal bridges were calculated and reflected through a three-dimensional heat transfer analysis. In the former case, the effect of thermal bridges is approximated by increasing or decreasing the thickness of the insulation only in the exterior wall configuration, while in the latter case, the effect of linear and point thermal bridges can be considered together by subtracting the heat flow rate through non-thermal bridges from the total heat flow rate. The method reflecting the heat transfer coefficient through the linear and point thermal bridges results in 13.9 to 19.6% greater annual heating and cooling energy use than the method reflecting the effective U-factor, and the savings for the base case and alternatives are similar for both methods.

Keywords

DesignBuilder

Dynamic Building energy simulation

Thermal bridge

Effective U-factor

Heat transfer coefficient

키워드

디자인빌더

동적 건물에너지 해석

열교

유효 열관류율

전열계수

References

Ge, H., Baba, F. (2015). Dynamic effect of thermal bridges on the energy performance of a low-rise residential building. Energy and Buildings, 105, 106-118.

10.1016/j.enbuild.2015.07.023

Zhao, K., Jiang, Z., Huang, Y., Sun, Z., Wang, L., Gao, W., Ge, J. (2022). The method of reducing heat loss from thermal bridges in residential buildings with internal insulation in the lot summer and cold winter zone of China. Journal of Building Engineering, 62, 105421.

10.1016/j.jobe.2022.105421

Song, J.H., Lee, D.Y., Choi, B.H., Song, S.Y. (2020). Thermal Bridging Effect of Window-Wall Junction in Apartment Buildings using Current Installation Method of Window to Wall. KIEAE Journal, 20(5), 135-142.

10.12813/kieae.2020.20.5.135

Korean Institute of Architectural Sustainable Environment and Building Systems (KIAEBS). (2017). Thermal performance of window including installation thermal bridge. KIAEBS S-8.

Ministry of Environment (MOE). (2020). Press release, 2050 Carbon Neutral Strategy of the Republic of Korea, Sejong, Korea.

Ministry of Land, Infrastructure and Transport (MOLIT). (2023). Design Standard for Energy-Efficient Buildings.

DesignBuilder. (2021). DesignBuilder simulation documentation for DesignBuilder v.7.

ISO 10211. (2017). Thermal bridges in buildings construction - Heat flows and surface temperatures - Detailed calculations.

ISO 13789. (2007). Thermal performance of buildings - Transmission and ventilation heat transfer coefficients - Calculation method.

ISO 14683. (2007). Thermal bridges in buildings construction - Linear thermal transmittance - Simplified methods and default values.

ISO 6946. (2007). Building components and building elements - Thermal resistance and thermal transmittance - Calculation method.

Information

Publisher :Korean Institute of Architectural Sustainable Environment and Building Systems
Publisher(Ko) :한국건축친환경설비학회
Journal Title :Journal of Korean Institute of Architectural Sustainable Environment and Building Systems
Journal Title(Ko) :한국건축친환경설비학회논문집
Volume : 18
No :2
Pages :152-164
Received Date : 2024-04-02
Revised Date : 2024-04-18
Accepted Date : 2024-04-29
DOI :https://doi.org/10.22696/jkiaebs.20240014

Journal of Korean Institute of Architectural Sustainable Environment and Building Systems ISSN:1976-6483(Print) 2586-0666(Online) 한국건축친환경설비학회논문집

All Issue