Uncertainty in the Sizing of Ground Heat Exchangers by the Building Infiltration Modeling

Seung-Hyo Baek

doi:10.22696/jkiaebs.20220007

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2022 Vol.16, Issue 1 Preview Page Next Page

Research Article

Uncertainty in the Sizing of Ground Heat Exchangers by the Building Infiltration Modeling 건물의 침기율 모델링에 따른 지중 열교환기 용량 산정의 불확실성

28 February 2022. pp. 68-79

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Abstract

The length of ground heat exchangers is a key factor in the stable operation of ground-source heat pump systems. Different design variables or parameters such as the thermal properties of the ground and heat pump efficiency are considered in sizing ground heat exchangers. Among these, building heating and cooling loads are one of the most significant. However, a variety of uncertain parameters in the building simulation process makes it difficult to reliably estimate building heating and cooling loads. This study investigated the effects of uncertainty in estimating building heating and cooling loads on the sizing of ground heat exchangers, by considering the impact of changes in infiltration rate on these load and consequently on the size of the heat exchanger. EnergyPlus 9.4 was used to estimate the heating and cooling loads of a mid-rise residential building and GLHEpro 5.0 was used to determine the total length of ground heat exchangers. The results show that an increase in the infiltration rate caused an increase in peak building heating and cooling loads. Consequently, the required length of ground heat exchangers calculated by each zone and model differ. Additionally, sensitivity of the size of ground heat exchangers to changes in infiltration rate varied with different patterns of peak and yearly building loads. Therefore, sensitivity analysis of the major parameters used for estimating building heating and cooling loads is needed to ensure that the sizing of ground heat exchangers is robust.

Keywords

Ground heat exchangers sizing

Building heating and cooling load

Uncertainty

키워드

지중 열교환기 용량 산정

건물 냉난방 부하

불확실성

References

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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 : 16
No :1
Pages :68-79
Received Date : 2022-01-12
Revised Date : 2022-02-10
Accepted Date : 2022-02-10
DOI :https://doi.org/10.22696/jkiaebs.20220007

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

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