An article by our colleagues in the Przegląd Elektrotechniczny

In the last issue of the Przegląd Elektrotechniczny, an article was published entitled "The Effect of Cable Duct Diameter on the Ampacity of High-Voltage Power Cables", co-authored by our colleagues, Michał Kołtun and Filip Ratkowski.

The ampacity of power cables depends, among others, on the conditions of heat dissipation from the cable to the environment. Cables are usually laid directly in the ground, but in some sections, they may be placed in ducts, which adversely affects the ampacity of the cable line. The paper presents heat transfer phenomena for cables installed in pipe-type ducts filled with air. The effect of cable duct diameter on this ampacity is discussed. The results of the theoretical analysis have been validated by calculations performed with CYMCAP software. The comparison of the ampacity for air-filled vs. water- or bentonite-filled ducts is also included. The analyses and comparisons have shown that with an appropriate dimension of the duct, the simplest filling (with air) allows to obtain the ampacity not lower than when water or bentonite is used
The full text of the article can be found here.

Congratulations to the authors of the publication!