In recent years the use of cable tunnels in large urban areas has become more popular, with the additional capital cost becoming increasingly acceptable in light of the growing difficulties incurred for large scale directly buried cable installations. Presently cable ratings for such circuits are calculated using the method of Electra 143. However the applicability of this method is restricted ...

As a first step to a better understanding of the voltage-current characteristics of fine filament multifi lamentary composite superconductors, the electric field and critical current along a single spiral-shaped fi lament were studied. When the spiral superconducting filament was carrying constant current and placed in a magnetic field, the local critical current and electric field vary due to ...

Now there is a continuous increase in loads electric networks that are undergoing aging of grid equipment. These factors lead to large electricity losses electrical networks, as well decrease the current-carrying capacity network elements. Therefore, issue need minimize loss energy, reduce current load elements, order its throughput, becoming more and acute. One most effective ways power elemen...

Water saturation and cation exchange capacity are the most significant parameters used to calculate a hydrocarbon zone potential. In clean formations, by applying the famous Archie model, which assumes that in the formation the only electric conductor is the formation water, the water saturation can be calculated. Additionally, in shaly sand formations this assumption may not be true as the ion...

In this paper, a flexible numerical framework to provide thermal performance assessment for the underground buried cables, considering different geological and meteorological conditions, has been presented. Underground cables tend retain heat produced in conductor, so complex coupled thermo-hydraulic response of porous medium surrounding needs be assessed prevent cable overheating associated re...