  The international Maritime Organization (IMO) has set the target of reducing
the emissions from the shipping sector to at least 50% of the 2008 levels. One
potential method to cut emissions is to convert vessels to battery powered
propulsion in a similar manner to that which has been adopted for motor
vehicles. Although, battery powered propulsion will not be suitable for all
vessels, the conversion of those that are will lead to an increase in the
energy demand from the national grid. This study uses historic port call data
is used to model the timings of arrivals and the number of vessels in the port
of Plymouth to predict the increase in additional energy demand required for
battery powered vessels through a period of 24 hours as a greater proportion of
the fleet move to battery powered propulsion.
