14. starptautiskā konference 2012 - Latvijas Jūras akadēmija

Proceedings of 14th International conference „Maritime Transport and Infrastructure - 2012”evaluate the safety aspects and connection / disconnection procedures. Safety for the personnelinvolved should be assessed in terms of transition processes in the vessel power system as well asconsidering the ability of the staff to perform the necessary operations in extreme cases of emergency(fire, flooding ) also in case of necessity to use the mooring winches , anchor gear, etc.).For example MS "Romantika" onboard power plant constitutes of 3 diesel generators Wartsila6R32L with a nominal capacity of 2400 kW (3 generators with Sn = 2950kVA). In winter andsummer, the engine load is in the range of 70 - 80%. The ship at Riga port is standing for 6 hours andconsumes 1.0 – 1.2 t MDO with the S content of 0.1%.Fig.4. Shore power connection visualization of the LNG vessel [4.7]Conclusions and proposals for set-up of ship shore-side electricity in Riga Freeport1. It is important to involve in the shore-side electricity project potential shipping lines,environment protection organizations, shore power connection technology / solution providers,electrical power companies and terminal operators.2. It would be prudent to provide shore power module / cable runs from the port in emergingareas such as the Krievu sala already in their design stage.3. Passenger portTo provide ferries Romantika and Festival with the connection of 690V/50Hz voltage,analogous to how they are provided at the port of Stockholm. It is possible that without substantialadditional costs a high voltage connection 6.6 kV as well as the connection to 380V mains is alsoestablished.Necessary shore power capacity estimation:Assuming that at Riga Passenger Port at the same time could berthed up to 4 Romance(Tallink) size ships (length 200 m, 2500 passengers). Power consumption for one vessel varies from1600kW (summer load in case if there is no need for air conditioning) to 2200kW in winter.At least 3 ships from them will get shore power supply at the same time.So the total capacity of the shore network to be estimated up to 5-6 MW (assumingsimultaneity factor of 0.8).4. Design / research works to be done:4.1. Due to European Union directives 205/33/EC (from January 2010) the introduction of theshore power supply may become economically profitable for ship owners / operators. It is necessary to94