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2023 Vol.17, Issue 6 Preview Page

Research Article

Global Sensitivity Analysis for ASHRAE Borehole Heat Exchanger Sizing Method

ASHRAE 지열교환기 설계법에 대한 전역 민감도 분석

Euntak Shin1
,
Yoonseong Kim2
,
Wonjun Choi3*
신 은탁1
,
김 윤성2
,
최 원준3*
1Undergraduate Student, School of Architecture, Chonnam National University, Gwangju, Korea
2Master’s Course Student, Department of Architecture and Civil Engineering, Chonnam National University, Gwangju, Korea
3Associate Professor, School of Architecture, Chonnam National University, Gwangju, Korea
1전남대학교 건축학부 학부과정
2전남대학교 대학원 건축토목공학과 석사과정
3전남대학교 건축학부 부교수
*Corresponding Author
30 December 2023. pp. 343-353
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Abstract

Ground heat exchanger (GHE) is a critical component of ground-source heat pump systems. One of the most common GHE types is borehole heat exchanger (BHE). The determination of the required BHE length is influenced by many uncertain parameters, including the ground thermal load, ground thermal properties, and BHE geometry. The ground thermal load is influenced by the building loads and heat pump efficiency, which can vary widely. Spatially averaged ground thermal properties inherently involve uncertainty. Furthermore, the construction process for BHEs cannot be entirely controlled. The propagation of parameter uncertainties throughout the sizing process results in a significant level of uncertainty in estimating BHE length. Therefore, this study aims to quantify the contribution of each input parameter to BHE sizing, elucidating their impacts on BHE sizing uncertainty. The results exhibited that the 1-hour peak ground load and 720-hour-long peak ground load are the most influential factors contributing to BHE sizing uncertainty. Consequently, the results suggest that prioritizing uncertainty management of parameters related to ground load is essential to enhance the reliability of BHE design.

Keywords
Ground source heat pump
Global sensitivity analysis
Uncertainty quantification
ASHRAE borehole heat exchanger sizing method
키워드
지열히트펌프
전역 민감도 분석
불확실성 산정
ASHRAE 지열교환기 설계법
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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 : 17
  • No :6
  • Pages :343-353
  • Received Date : 2023-10-10
  • Revised Date : 2023-11-16
  • Accepted Date : 2023-11-29
  • DOI :https://doi.org/10.22696/jkiaebs.20230029
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