이중탐침법을 이용한 수평형 지중열교환기 뒤채움재의 열확산계수 측정Thermal Diffusivity Measurement of Backfilling Materials for Horizontal Ground Heat Exchanger Using Dual-Probe Method
- Other Titles
- Thermal Diffusivity Measurement of Backfilling Materials for Horizontal Ground Heat Exchanger Using Dual-Probe Method
- Authors
- 손병후; 최항석
- Issue Date
- 2011
- Publisher
- 한국지열에너지학회
- Keywords
- Thermal diffusivity(열확산계수); Backfilling materials(뒤채움재); Horizontal ground heat exchanger(수평형 지중열교환기); Dual-probe method(이중탐침법)
- Citation
- 한국지열에너지학회논문집, v.7, no.2, pp.51 - 59
- Indexed
- KCI
OTHER
- Journal Title
- 한국지열에너지학회논문집
- Volume
- 7
- Number
- 2
- Start Page
- 51
- End Page
- 59
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/114288
- ISSN
- 1738-6985
- Abstract
- Storage and transfer heat in soils are 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 measured results of the thermal diffusivity of soils(silica, quartzite, limestone, sandstone, and 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 and volumetric heat capacities using dual-probe method and (ii) compare the estimates from 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. Measurements made by using the dual-probe method agreed well with independent estimates obtained using the single-probe method.
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Collections - College of Engineering > School of Civil, Environmental and Architectural Engineering > 1. Journal Articles
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