Global Sensitivity Analysis for ASHRAE Borehole Heat Exchanger Sizing Method

Euntak Shin; Yoonseong Kim; Wonjun Choi

doi:10.22696/jkiaebs.20230029

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2023 Vol.17, Issue 6 Preview Page Next Page

Research Article

Global Sensitivity Analysis for ASHRAE Borehole Heat Exchanger Sizing Method ASHRAE 지열교환기 설계법에 대한 전역 민감도 분석

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

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

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