First in situ determination of the ground thermal conductivity for boreholeheat exchanger applications in Saudi Arabia

Mostafa H. Sharqawy; S. A. Said; E. M. Mokheimer; M. A. Habib; H. M. Badr; N. A. Al-Shayea

doi:10.1016/j.renene.2009.03.003

First in situ determination of the ground thermal conductivity for boreholeheat exchanger applications in Saudi Arabia

Mostafa H. Sharqawy^*
, S. A. Said
, E. M. Mokheimer
, M. A. Habib
, H. M. Badr
, N. A. Al-Shayea

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

76 Scopus citations

Abstract

The paper deals with the in situ experimental determination of the thermal properties of the underground soil for use in the design of borehole heat exchangers (BHE). The approach is based on recording the unsteady thermal response of a BHE that has been installed for the first time in Saudi Arabia. In this approach, the temperature of the circulating fluid has been recorded at the inlet and outlet sections of the BHE with time following the start of its operation. Severe fluctuations in these temperatures occur at small times (up to 8 h) due to the transient effects inside the borehole and must be excluded. A method has been developed for estimating the time period characterized by these severe fluctuations. The recorded thermal responses together with the line source theory are used to determine the thermal conductivity, thermal diffusivity and the steady-state equivalent thermal resistance of the underground soil.

Original language	English
Pages (from-to)	2218-2223
Number of pages	6
Journal	Renewable Energy
Volume	34
Issue number	10
DOIs	https://doi.org/10.1016/j.renene.2009.03.003
State	Published - Oct 2009

Bibliographical note

Funding Information:
The authors acknowledge the support provided by King Abdulaziz City for Science and Technology (KACST) and King Fahd University of Petroleum and Mineral (KFUPM) for this research project. The experimental work was funded by KACST under project number AR-23-83.

Keywords

Borehole heat exchanger
Geothermal energy
Ground coupled heat pump
Saudi Arabia
Soil properties

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.renene.2009.03.003

Cite this

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title = "First in situ determination of the ground thermal conductivity for boreholeheat exchanger applications in Saudi Arabia",

abstract = "The paper deals with the in situ experimental determination of the thermal properties of the underground soil for use in the design of borehole heat exchangers (BHE). The approach is based on recording the unsteady thermal response of a BHE that has been installed for the first time in Saudi Arabia. In this approach, the temperature of the circulating fluid has been recorded at the inlet and outlet sections of the BHE with time following the start of its operation. Severe fluctuations in these temperatures occur at small times (up to 8 h) due to the transient effects inside the borehole and must be excluded. A method has been developed for estimating the time period characterized by these severe fluctuations. The recorded thermal responses together with the line source theory are used to determine the thermal conductivity, thermal diffusivity and the steady-state equivalent thermal resistance of the underground soil.",

keywords = "Borehole heat exchanger, Geothermal energy, Ground coupled heat pump, Saudi Arabia, Soil properties",

author = "Sharqawy, \{Mostafa H.\} and Said, \{S. A.\} and Mokheimer, \{E. M.\} and Habib, \{M. A.\} and Badr, \{H. M.\} and Al-Shayea, \{N. A.\}",

note = "Funding Information: The authors acknowledge the support provided by King Abdulaziz City for Science and Technology (KACST) and King Fahd University of Petroleum and Mineral (KFUPM) for this research project. The experimental work was funded by KACST under project number AR-23-83. ",

year = "2009",

month = oct,

doi = "10.1016/j.renene.2009.03.003",

language = "English",

volume = "34",

pages = "2218--2223",

journal = "Renewable Energy",

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number = "10",

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TY - JOUR

T1 - First in situ determination of the ground thermal conductivity for boreholeheat exchanger applications in Saudi Arabia

AU - Sharqawy, Mostafa H.

AU - Said, S. A.

AU - Mokheimer, E. M.

AU - Habib, M. A.

AU - Badr, H. M.

AU - Al-Shayea, N. A.

N1 - Funding Information: The authors acknowledge the support provided by King Abdulaziz City for Science and Technology (KACST) and King Fahd University of Petroleum and Mineral (KFUPM) for this research project. The experimental work was funded by KACST under project number AR-23-83.

PY - 2009/10

Y1 - 2009/10

N2 - The paper deals with the in situ experimental determination of the thermal properties of the underground soil for use in the design of borehole heat exchangers (BHE). The approach is based on recording the unsteady thermal response of a BHE that has been installed for the first time in Saudi Arabia. In this approach, the temperature of the circulating fluid has been recorded at the inlet and outlet sections of the BHE with time following the start of its operation. Severe fluctuations in these temperatures occur at small times (up to 8 h) due to the transient effects inside the borehole and must be excluded. A method has been developed for estimating the time period characterized by these severe fluctuations. The recorded thermal responses together with the line source theory are used to determine the thermal conductivity, thermal diffusivity and the steady-state equivalent thermal resistance of the underground soil.

AB - The paper deals with the in situ experimental determination of the thermal properties of the underground soil for use in the design of borehole heat exchangers (BHE). The approach is based on recording the unsteady thermal response of a BHE that has been installed for the first time in Saudi Arabia. In this approach, the temperature of the circulating fluid has been recorded at the inlet and outlet sections of the BHE with time following the start of its operation. Severe fluctuations in these temperatures occur at small times (up to 8 h) due to the transient effects inside the borehole and must be excluded. A method has been developed for estimating the time period characterized by these severe fluctuations. The recorded thermal responses together with the line source theory are used to determine the thermal conductivity, thermal diffusivity and the steady-state equivalent thermal resistance of the underground soil.

KW - Borehole heat exchanger

KW - Geothermal energy

KW - Ground coupled heat pump

KW - Saudi Arabia

KW - Soil properties

UR - https://www.scopus.com/pages/publications/66149182709

U2 - 10.1016/j.renene.2009.03.003

DO - 10.1016/j.renene.2009.03.003

M3 - Article

AN - SCOPUS:66149182709

SN - 0960-1481

VL - 34

SP - 2218

EP - 2223

JO - Renewable Energy

JF - Renewable Energy

IS - 10

ER -

First in situ determination of the ground thermal conductivity for boreholeheat exchanger applications in Saudi Arabia

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

UN SDGs

Access to Document

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Cite this