MIL-HDBK-1133
British thermal units per hour (kBtu/h) (or, in SI units,
thousand joules per hour [kJ/h]), is used for ship energy use.
In general, ships alongside the dock require two types of loads:
maintenance/overhaul loads and hotel loads. In this handbook,
most minor repair work not associated with a Naval shipyard
(i.e., when the crew stays on board) is considered part of the
hotel load.
2.3.1
Maintenance/Overhaul Loads. Maintenance and overhaul
work is usually a combination of dockside and dry-dock operations
during which the crew is off the vessel. This kind of energy use
depends heavily on the type of work being performed and how this
work is performed at each specific location; consequently, it is
not easily quantified. At most installations, some means of
estimating this energy is in place and must be considered the
best available data.
2.3.2
Electric Hotel Loads. Electric hotel loads by ship
class are shown in the ship's characteristics database (SHIPS) at
http://www.efdlant.navfac.navy.mil/LANTOPS_15/home.htm and Construction Criteria
Base (CCB). For ships not included in the ship's characteristics
database (SHIPS) at http://www.efdlant.navfac.navy.mil/LANTOPS_15/home.htm and CCB,
hotel load data must be derived by other means. If a similar
ship (size, form, function) is listed in the ship's
characteristics database (SHIPS) at
http://www.efdlant.navfac.navy.mil/LANTOPS_15/home.htm and CCB, the listed loads may
be the best available data.
The estimated energy consumption
is calculated by multiplying the kilowatt load by the number of
hours the ship received shore power. Electric demand is simply
the kilowatt load, unless it is known that the ship was connected
during only off-peak periods when no kilowatt consumption is
billed.
2.3.3
Steam Hotel Loads. Steam hotel loads comprise the
constant load required for ship systems (e.g., domestic hot
water, galley, laundry, boiler) and the intermittent (space
heating) load. The ship's characteristics database (SHIPS) at
http://www.efdlant.navfac.navy.mil/LANTOPS_15/home.htm and CCB present the steam
loads by ship class. For ships not included in the ship's
characteristics database (SHIPS) at
http://www.efdlant.navfac.navy.mil/LANTOPS_15/home.htm and CCB, use data from the
table for a similar ship. The intermittent load is based on
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