RECOVERING KINETIC ENERGY AT TRAIN BRAKING
In the study, the technical and economical premises to recover kinetic energy at electric train operation by feeding back energy to the supply system or by use of flywheels are investigated. The study mainly deals with AC systems (SJ electric train operation). DC-systems (SL underground system) are described briefly. An electro-hydraulic system with flywheels is also presented. The study presents quantities of energy that can be recovered, some technical solutions and the cost of these. For the SJ traffic it is firstly the commuter traffic that could be profitable at the energy prices of today.
Rubing track of portal crane's trunk is the main reasons resulted in the serious wear of wheel and the freguent damage of bearing.Some measures are taken.