TY - JOUR
TI - Controlling the thermal environment of underground power cables adjacent to heating pipeline using the pavement surface radiation properties
AU - Klimenta Dardan O
AU - Perović Bojan D
AU - Klimenta Jelena Lj
AU - Jevtić Milena M
AU - Milovanović Miloš J
AU - Krstić Ivan M
JN - Thermal Science
PY - 2018
VL - 22
IS - 6
SP - 2625
EP - 2640
PT - Article
AB - This paper shows how the pavement surface radiation properties can be used to  control the thermal environment of 110 kV underground cables in order to  increase their ampacity. It is assumed that the ampacity is additionally  affected by the cable bedding size and an underground heating pipeline.  Thanks to an experimental apparatus, some useful data were collected for the  validation of two different FEM-based models that predict the effect of the  pavement surface radiation properties on the cable ampacity. The first model  corresponds to the experimental apparatus and actual indoor conditions, while  the second one correspond to the theoretical case and assumed outdoor  conditions (taking into account the thermal effects of solar radiation, cable  bedding size and heating pipeline). This paper examines two possible cases of  outdoor conditions, one corresponding to summer period (the most unfavorable  ambient conditions) and another one corresponding to winter period (the most  common winter conditions in Serbia). This proposed new method is based on the  experimental data and generalized using the FEM in COMSOL. It is found that  the ampacity of the considered 110 kV cable line can be increased up to 25.4  % for the most unfavorable ambient conditions and up to 8 % for the most  common winter conditions. [Project of the Serbian Ministry of Education,  Science and Technological Development, Grant no. TR33046]