MIL-HDBK-1003/11
9.2 Single-Level Diesel-Electric Generating Plant Layout. The single-story
slab-on-grade layout is the usual design for smaller electric-generating
plants (1,000 kW capacity and smaller). This layout may also be used for
larger capacity generating plants where special conditions dictate the use
of a single-level installation. All auxiliaries and support facilities are
located on the same level. Single level construction requires more floor
area. Trenches must be constructed in the slab for major piping runs. Such
trenches become awkward for larger generating capacity plants with several
units installed in parallel. Engine-generator sets are usually set on
separate foundation blocks and are isolated from the floor slab. Some
smaller skid mounted units may be set on isolators and bolted to floor
slabs.
9.3 Two-Level Diesel-Electric Generating Plant Layout. Two-level
installations consist of an upper level engine operating floor and a lower
level for major auxiliaries. This type of layout is most applicable to
larger units installed in parallel. Such plants require less site are than
do single level plants and the operating floor is kept relatively clear of
obstructions.
9.3.1 Two-Level Plant with a Basement. The operating floor is at ground
level and major auxiliaries are installed in a below-grade basement area.
Gratings are usually provided along sides and at the front of the engines to
aid in ventilation and to provide access for maintenance of the units
and the lower level auxiliaries.
9.3.2 Two-Level Plant with a First Floor at Grade. The layout is
basically the same as the two-level plant with a basement. The only major
exception is that offices and support facilities are normally located in the
second (raised) level. The two-story arrangement has some advantages over
other layouts in lighting and in ventilating features. A significant
advantages in avoiding the dangers of flooding which prevail in basement
type installations located in wet climates. Where weather conditions
permit, portions of the first floor may remain open. However, consideration
must be given to plant locations in proximity to noise-sensitive areas and
facilities.
47
Previous Page
