MIL-HDBK-1133
2.7.3
Sewer Energy. Sewer processing energy is used in a
variety of pumps and mixing motors as well as sewage booster
pumps. Estimates of the energy use associated with the booster
pumps can be calculated in a manner similar to that for the water
supply estimate. Specific operating records for the processing
pumps and mixing motors may not exist. However, most sewage
processing is a 24-hour-a-day operation. Discussions with
operating personnel may provide appropriate details, and motor
efficiency and loading should be considered.
2.8
Miscellaneous Nonbuilding Loads
2.8.1
Exterior Communications. Exterior communication energy
use usually associated with shore-to-ship operations is variable
and therefore hard to quantify. Normal ship or building
communication traffic will be included in estimates of typical
ship and communications building electricity use. However,
unusually heavy transmissions or continuous use may need to be
assessed separately and added to appropriate ship or building
consumption estimates. The estimate of these additional loads
could be derived using the nameplate ratings on specific
equipment, estimated hours of operation, and length of
transmissions. The transmission length and number information
should be available from a communications office where
transmission information is kept.
2.8.2
Process Loads. Process loads such as production and
ship/aircraft overhaul are also difficult to quantify. A
preferred method of identifying process energy use is the use of
short-term portable metering (day or week) of selected processes
as a baseline for energy consumption. If this is not practical,
the loads can be estimated by identifying the equipment in use,
its actual energy draw (from nameplate or spot metering), and
operating characteristics.
2.8.3
Steam and Hot Water Distribution Losses. Steam and hot
water distribution losses are not included as part of initial
building energy use values in this handbook. If distribution
losses are to be apportioned throughout all buildings that use
this energy, then calculation of losses is not specifically
required for a final reconciliation of all installation energy.
The energy will be apportioned to the buildings as part of the
reconciliation process. However, a method is presented here to
separately assess this energy if needed.
The method involves an assessment of system plant
loading during no-use hours. The best times to use for this
estimate are those when there is no heating load and virtually no
hot water consumption. This would typically occur on a warm
weekday summer night between 1 a.m. and 4 a.m. Also, consider an
appropriate time in the spring prior to summer shutdowns and a
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