RT Journal Article
A1 Dardan Klimenta
A1 Bojan Perović
A1 Jelena Klimenta
A1 Milena Jevtić
A1 Miloš Milovanović
A1 Ivan Krstić

PB iet
T1 Controlling the thermal environment of underground cable lines using the pavement surface radiation properties
JN IET Generation, Transmission & Distribution
VO 12
IS 12
SP 2968
OP 2976
AB The main purpose of this study is to show how the emissivity and absorptivity of a pavement surface above underground cables affect their ampacity. The use of cool pavements whose surfaces absorb less heat from the Sun than they emit to the ambient is considered as a novel method to control the thermal environment of underground cables. The method predicts that the trench along the entire length of a 110 kV cable line is completely filled with quartz sand and paved with a cool pavement. Quartz sand would provide good conduction of heat from the cables to the earth and pavement surfaces, while a paved surface of the trench would establish approximately unchangeable convection and radiation boundary conditions along the entire cable line route. It is assumed that the three-phase system is balanced and that the boundary conditions along the earth and pavement surfaces are the most unfavourable. The novel method is based on the results of experimental research, generalised and verified numerically using the finite-element method in COMSOL. Finally, it is established that the ampacity of the 110 kV cable line can be increased up to 26.7%.
K1 radiation boundary conditions
K1 thermal environment control
K1 cool pavements
K1 quartz sand
K1 underground cable lines
K1 COMSOL
K1 pavement surface absorptivity
K1 voltage 110 kV
K1 convection
K1 three-phase system
K1 pavement surface emissivity
K1 heat conduction
K1 pavement surface radiation properties
DO https://doi.org/10.1049/iet-gtd.2017.1298
UL https://digital-library.theiet.org/;jsessionid=2ek4lglvr2nsj.x-iet-live-01content/journals/10.1049/iet-gtd.2017.1298
LA English
SN 1751-8687
YR 2018
OL EN