Experimental Study of Soil Thermal Properties Based on the Transient Method

DOI

10.2991/iceesd-17.2017.70How to use a DOI?

Keywords

GSHP; Thermal Conductivity; Transient Plane Source Method; Moisture content; Dry density

Abstract

he soil thermal conductivity is an important parameter of heat efficiency in the application of ground source heat pump. We based on the principles of Transient Plane Source Method and selected clay and sandy soil from Yangtze River in Wuhan, using DRE - III multi-function rapid thermal conductivity tester to carry out soil thermal properties test under the condition of different water content, different dry density and different ratio of sand to clay. The results show that Coefficients of thermal conductivity of sand and clay increase with the increase of water content and dry density, and the effect of the water content is larger than that of dry density. In the thermal properties of sand and clay mixture experiment, it has the highest thermal conductivity when the ratio of sand to clay is 2:1. We analyzed the test results on the basis of experiment, and discussed the soil thermal properties and change mechanism. This study provides an important reference for the application of backfill to buried pipe in geothermal applications.

Copyright

© 2017, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Qizhi Hu
AU  - Jian Li
AU  - Jian Lin
AU  - Chao Xie
PY  - 2017/04
DA  - 2017/04
TI  - Experimental Study of Soil Thermal Properties Based on the Transient Method
BT  - Proceedings of the 2017 6th International Conference on Energy, Environment and Sustainable Development (ICEESD 2017)
PB  - Atlantis Press
SP  - 372
EP  - 380
SN  - 2352-5401
UR  - https://doi.org/10.2991/iceesd-17.2017.70
DO  - 10.2991/iceesd-17.2017.70
ID  - Hu2017/04
ER  -