THERMAL SCIENCE

International Scientific Journal

Thermal Science - Online First

online first only

A MODEL FOR THE EVALUATION OF HEAT LOSS FROM UNDERGROUND CABLES IN NON-UNIFORM SOIL TO OPTIMIZE THE SYSTEM DESIGN

ABSTRACT
With the proliferation of technologies and underground systems, analysis of thermal fields in soil has become a topic of great interest in the developing technology of buried structures. In this work, we have investigated the steady state temperature field (from linear heat sources - buried cable -) in a different type of soil and excavation geometry. In a laboratory, a physical model was built on scale, which reproduces an "undisturbed" area containing a linear thermal source. This scale model was produced for experimental activity. A measuring chain was made to analyze the thermal field in various types of soils, by varying the electrical current through the line source. The physical model was recreated using a finite volume calculation software. Analysis of the different field system configurations were completed and we have studied a model for the improvement of the design method.
KEYWORDS
PAPER SUBMITTED: 2012-05-28
PAPER REVISED: 2013-09-01
PAPER ACCEPTED: 2013-09-05
PUBLISHED ONLINE: 2013-09-22
DOI REFERENCE: 10.2298/TSCI120528119S
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