2.3.3.2
Ambient and Inlet Conditions Operating Ranges
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NOTE: Designer should furnish required information
to complete the specification.
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Allowing for rational engineering performance adjustments due to variations
in ambient and inlet conditions, the compressor shall be designed,
equipped, and furnished to be fully operational without abnormal wear
throughout the entire range between and including the limits of the winter
and summer design conditions specified.
a.
Summer Design Conditions:
Inlet Air: [_____] degrees C F dry bulb and [_____] degrees C F wet
bulb temperatures, [_____] percent relative humidity, Inlet
Cooling Water: [_____] degrees C F, Ambient Compressor Room
Temperature: [_____] degrees C F, Barometric Pressure: [_____]
kPa (absolute) psia
b.
Winter Design Conditions:
Inlet Air: [_____] degrees C F dry bulb and [_____] degrees C F wet
bulb temperatures, [_____] percent relative humidity, Inlet
Cooling Water: [_____] degrees C F, Ambient Compressor Room
Temperature: [_____] degrees C F, Barometric Pressure: [_____]
kPa (absolute) psia.
2.3.3.3
Critical Speeds
Actual critical speeds shall not encroach upon operating speed ranges at
specified loads ranges. Rotors shall be of a stiff shaft construction with
the first actual rotor bending critical speed at least 120 percent of the
maximum operating speed.
2.3.3.4
Vibration and Balance
Major parts of rotating elements, such as rotors, gears, and similar items
shall be individually dynamically balanced. During the factory and site
tests of the assembled machine at operating speed, the double amplitude of
vibration in any plane measured on the shaft adjacent and relative to a
radial bearing shall not exceed the limits of API Std 619, paragraph
2.7.2.5. For shafts which are not accessible, the manufacturer shall
submit a testing procedure to the Contracting Officer for approval.
2.3.4
Electrical Service Conditions
2.3.4.1
Air Compressor Drive Motor
[_____] volts, 3 phase, 3 wire, 60 hertz electrical service.
2.3.4.2
Accessory electrical Service
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NOTE: Change accessory voltages if required for
site conditions.
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SECTION 15215N
Page 14
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