Chapter
Apr 26, 2012
Application of FBG Sensors to Ground Heat Pump System
Authors: L. Ren, H. N. Li, L. Sun, D. S. Li, and G. B. SongAuthor Affiliations
Publication: Engineering, Construction, and Operations in Challenging Environments: Earth and Space 2004
Abstract
This paper discusses of the monitoring of the temperature distribution by an optical fiber Bragg grating sensor system. The sensors are embedded in a pipe underground. Ground-source heat pump system utilizes the thermal energy of the underground soil to heat or cool a building. Optical fiber Bragg grating sensors are used to measure the temperature distribution of the soil and the thermal difference of the circulating water system. The sensors were designed and packaged delicately to eliminate the influence of strain as well as to improve the thermal sensitivity. Three Bragg grating sensors were placed at intervals of five meters in a deep well with a length of 25 meters. Data were collected prior to the installation of the monitoring system and immediately after the installation of the water pipes using a commercial FBG interrogation system. The ultimate purposes of these tests are to measure the water temperature fluctuation along the pipe at the places where the sensors were installed during the operation of the ground source heat pump system, and evaluate the reliability of FBG sensor system for a long period.
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Published In
Engineering, Construction, and Operations in Challenging Environments: Earth and Space 2004
Pages: 554 - 558
Copyright
© 2004 American Society of Civil Engineers.
History
Published online: Apr 26, 2012
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Authors
Affiliations
L. Ren
School of Civil and Hydraulic Engineering, Dalian University of Technology, P.O. Box 116024, Dalian, Liaoning, China
H. N. Li
School of Civil and Hydraulic Engineering, Dalian University of Technology, P.O. Box 116024, Dalian, Liaoning, China
L. Sun
School of Civil and Hydraulic Engineering, Dalian University of Technology, P.O. Box 116024, Dalian, Liaoning, China
D. S. Li
School of Civil and Hydraulic Engineering, Dalian University of Technology, P.O. Box 116024, Dalian, Liaoning, China
G. B. Song
School of Civil and Hydraulic Engineering, Dalian University of Technology, P.O. Box 116024, Dalian, Liaoning, China
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