단일 탐침법을 이용한 수평형 지중열교환기 뒤채움재의 열확산계수 산정Thermal Diffusivity Evaluation of Backfilling Materials for Horizontal Ground Heat Exchanger Using Single-Probe Method
- Other Titles
- Thermal Diffusivity Evaluation of Backfilling Materials for Horizontal Ground Heat Exchanger Using Single-Probe Method
- Authors
- 손병후; 최항석
- Issue Date
- 2011
- Publisher
- 대한설비공학회
- Keywords
- Thermal diffusivity(열확산계수); Backfilling materials(뒤채움재); Horizontal ground heat exchanger(수평형 지중열교환기); Single-probe method(단일 탐침법)
- Citation
- 설비공학 논문집, v.23, no.5, pp.356 - 364
- Indexed
- KCI
- Journal Title
- 설비공학 논문집
- Volume
- 23
- Number
- 5
- Start Page
- 356
- End Page
- 364
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/113903
- ISSN
- 1229-6422
- Abstract
- Storage and transfer heat in soils is governed by the soil thermal properties and these properties are therefore needed in many engineering applications, including horizontal ground heat exchanger for ground-coupled heat pumps. This paper presents the evaluation results of the thermal diffusivity of soils (silica, quartzite, limestone, sandstone, granite, and two masonry soils) used for the trench backfilling materials of the horizontal ground heat exchanger. To assess this thermal property, we (i) measure the soil thermal conductivities using single-probe method and (ii) use the de Vries method of summing the heat capacities of the soil constituents. The results show that the thermal diffusivity tends to increase as dry soil begins to wet, but it approaches a constant value or even decreases as the soil continues to wet. Combined algorithm with an improved model for the thermal conductivity of soils and the constituent equation provides accurate estimates of the soil thermal diffusivity.
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Collections - College of Engineering > School of Civil, Environmental and Architectural Engineering > 1. Journal Articles
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