MIL-HDBK-1027/4A
High Bay Area. Coordinate structural, crane and hoist systems, and
device equipment amenities with routing of supply and return air ductwork.
Platforms, HVAC, and ductwork supporting the device are normally supplied by
the device manufacturer.
2.2.6.1
Design Conditions. Design conditions for comfort conditioning
should be determined in compliance with MIL-HDBK-1190. Electronic and
computer procurement documents require that equipment function properly in an
air conditioning environment between 60 degrees and 80 degrees Fahrenheit and
between 45 degrees and 120 degrees for mechanical equipment including
hydraulics. Special facility conditions follow:
a) Space conditioning requirements below 75 degrees Fahrenheit (F)
at 50 percent relative humidity, or tolerances tighter than plus or minus 2
degrees F and plus or minus 10 percent relative humidity are prime causes of
operational problems after the building is occupied. Such requirements
should be justified by NAVAIR and/or NAWCTSD. If these are valid
requirements, pay special attention to architectural treatments with respect
to space moisture sealing and insulation.
b)
Dedicated heat rejection equipment (such as compressors,
condensers, and condensing units) serving training devices should be located
outside of environmentally conditioned spaces. For equipment requiring
internal cooling (e.g. cockpit cooling, projection domes, etc.) or with
special cooling requirements outside normal comfort air conditioning limits,
cooling should be provided by the manufacturer of the training equipment.
c)
The environment for hydraulics should be between 45 degrees and
120 degrees.
Provide heat as necessary to maintain the minimum temperature.
2.2.6.2
Ventilation. Provide ventilation rates for occupied spaces as
required in ASHRAE STD 62, Ventilation for Acceptable Indoor Air Quality.
Provide thermostatically controlled forced ventilation in mechanical,
electrical and hydraulic spaces. Cool hydraulic pump rooms and compressor
rooms by mechanical ventilation only.
2.2.6.3
Zoning, System Selection and Part Load Performance. Occupancy of
classroom areas varies drastically with respect to training schedule.
Consider each classroom/training area as a separate temperature and humidity
control zone. Provide individual temperature controls for each classroom.
Size terminal equipment to accommodate minimum as well as maximum loads.
Multiple air handling units (allowing staged turn-down of system capacity as
sensible load falls) should be considered. Terminal reheat is permitted to
meet part-load humidity performance requirements; in electronic equipment
spaces, the amount of reheat available should be approximately equal to the
sensible electronic load within the space.
2.2.6.4
Special Requirements for WTT and OFT
a)
Mechanical Pump Room. This space is normally not air
conditioned. Provide adequate ventilating air flow. Chilled water supply
and return lines are required in six DOF motion systems for connection to a
heat exchanger which is attached to the large hydraulic pumps. Chilled water
source should be provided by the manufacturer of the training device.
28
Previous Page
