MIL-HDBK 1028/6A
a)
Electric motor-driven centrifugal or rotary-screw
type compressors,
b)
Air dryers,
c)
Compressor cooling system,
d)
Compressor and compressed air system controls,
e)
Underground distribution system, and
f)
Aircraft hangar and parking apron service point facilities.
2.4.2
Design Requirements. A broad range of starting and cooling
air requirements exists because of differences in aircraft types and
operational function of the squadron or group. The ECS shall have a
minimum compressor size to supply air for the simultaneous starting of 12
of a typical full complement of 36 two-engine aircraft or the cooling of 3
of a full complement of 36 aircraft. Because the ECS compressed air flow
requirement is larger and is of longer duration than the starting air
requirement, the ECS compressed air requirement is used to determine
compressor size. With this requirement, all 12 aircraft can be started in
3 minutes with no recovery time required.
2.4.3
Design Conditions.
For design conditions refer to par. 2.3.3.
2.5
Preconditioned Cooling Air System. Note: A study commissioned
by NAVFACENGCOM Criteria Office is underway relative to providing
preconditioned cooling air. Results will be incorporated into this
handbook when completed. See Figure 5.
2.6
Electrical System. The electrical system provides the main power
supply and distribution for FPUS central equipment operations and central
facilities building services, and distributes 400 Hz and 60 Hz power to
parking apron service points and hangar service points. Provide load-
center type unit substation to supply FPUS facility power from the naval
air station primary distribution system. System design shall comply with
electrical installation standards specified in
MIL-HDBK-1004/1, Electrical Engineering, Preliminary Design Considerations,
MIL-HDBK-1004/2, MIL-HDBK-1004/3, Switchgear and Relaying, MIL-HDBK-1004/4,
Electrical Utilization Systems,
MIL-HDBK-1004/5, and MIL-HDBK-1004/6, Lightning Protection, and National
Fire Protection Association (NFPA) 70, National Electrical Code, and
American National Standards Institute (ANSI) C2, National Electrical Safety
Code.
2.6.1
System Components. Schematic diagrams of typical electrical
systems for the ECS and air start system are shown in Figures 6, 7, 8
and 9. The basic components of the system are:
9
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