Journal
THERMAL SCIENCE
Volume 23, Issue 5, Pages 3187-3198Publisher
VINCA INST NUCLEAR SCI
DOI: 10.2298/TSCI170916137Z
Keywords
transmission-lines; icing; de-icing; critical ice-melting current
Categories
Funding
- National Natural Science Foundation of China [51177115]
- Project of Doctoral Research Foundation of Xi'an Polytechnic University [BS1703]
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The thermal de-icing by Joule effect is a mostly valid way to prevent transmission-lines from the severe ice storm. A model was put forward to simulate the critical ice-melting current on iced conductor. Based on this model, the value of critical ice-melting current was calculated with various parameters, some of which were ignored in the earlier literatures, such as ice-layer heat conductivity, wind attack angle, and icing section shape. The results of the experiment and simulation show that the critical ice-melting current increase with wind speed, wind attack angle, and ice-layer heat conductivity, but decrease rapidly with ambient temperature and liquid water content. Moreover, the maximum difference between the results of simulation and experiment is about 9%, thus this model can be employed to estimate the engineering parameters in practical thermal de-icing projects.
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