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Modelling of piston secondary motion in Diesel Engines

  A numerical simulation model of the piston motion has been discussed in the present work. The proposed methodology was used to analyze the secondary motion of piston skirt about wrist pin axis as well as resulting vibrations of engine block due to impacts of piston skirt along  cylinder liner. Various dynamic parameters used in the simulation of motion were calculated using mechanical mobility which was obtained by means of vibration measurements. The amplitude of lateral motion was found to...

Design of a Compressor – Expander Group (CEG) for internal power recovery in cryogenic power plants

The electrical power consumption of refrigeration plants is evaluated to be in the order of 15% of the total electricity consumption worldwide. For this reason, many efforts are spent in the development of energy saving techniques to be applied to refrigeration and air conditioning systems. My PhD activities deal with the development of a device which allows an internal recovery in cryogenic plants, reducing their power consumption. Such a device consists in a Compressor-Expander Group (CEG) developed on the basis...