Evolution of Temperature Field around Underground Power Cable for Static and Cyclic Heating

Shahbaz Ahmad, Zarghaam Haider Rizvi, Joan Chetam Christine Arp, Frank Wuttke, Vineet Tirth and Saiful Islam
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Shahbaz Ahmad: Geomechanics & Geotechnics, Kiel University, 24118 Kiel, Germany
Zarghaam Haider Rizvi: Geomechanics & Geotechnics, Kiel University, 24118 Kiel, Germany
Joan Chetam Christine Arp: Geomechanics & Geotechnics, Kiel University, 24118 Kiel, Germany
Frank Wuttke: Geomechanics & Geotechnics, Kiel University, 24118 Kiel, Germany
Vineet Tirth: Mechanical Engineering Department, College of Engineering, King Khalid University, Abha 61411, Saudi Arabia
Saiful Islam: Civil Engineering Department, College of Engineering, King Khalid University, Abha 61411, Saudi Arabia

Energies, 2021, vol. 14, issue 23, 1-19

Abstract: Power transmission covering long-distances has shifted from overhead high voltage cables to underground power cable systems due to numerous failures under severe weather conditions and electromagnetic pollution. The underground power cable systems are limited by the melting point of the insulator around the conductor, which depends on the surrounding soils’ heat transfer capacity or the thermal conductivity. In the past, numerical and theoretical studies have been conducted based on the mechanistic heat and mass transfer model. However, limited experimental evidence has been provided. Therefore, in this study, we performed a series of experiments for static and cyclic thermal loads with a cylindrical heater embedded in the sand. The results suggest thermal charging of the surrounding dry sand and natural convection within the wet sand. A comparison of heat transfer for dry, unsaturated and fully saturated sand is presented with graphs and colour maps which provide valuable information and insight of heat and mass transfer around an underground power cable. Furthermore, the measurements of thermal conductivity against density, moisture and temperature are presented showing positive nonlinear dependence.

Keywords: underground power cable; cyclic thermal loading; convection in porous media; vadose zone heat transfer; thermal conductivity (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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