Chilled Water A/c Systems Parts

End item NSN parts page 1 of 30
Part Number
NSN
NIIN
0-18751NINSTBALL Bearing Ball
001006149
0-55 O-ring
012443527
0.50013UNC2BT1G 400NS/BEA Hexagon Plain Nut
002725700
0.625-11UN-2B NICU Hexagon Plain Nut
002725701
00-255-9504 Voltage Sensitive Resistor
002559504
000-01926 V Belt
005290345
00002249548 O-ring
001668422
0000453578 Bearing Ball
001006158
0001131 Hexagon Head Cap Screw
000680501
000138EB O-ring
006910144
000224EE O-ring
001668422
000549AA-404 Cartridge Fuse
008779934
0006206 Annular Ball Bearing
005543197
00068-447 O-ring
004219387
0011 Annular Ball Bearing
005543197
002-18-14-0001- Valve Seat
002009055
002-18-14-0001-0001 Valve Seat
002009055
002-19-20-0001-0002 Valve Seal
002009057
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Chilled Water A/c Systems

Picture of Chilled Water A/c Systems

Chilled water is a commodity often used to cool a building's air and equipment, especially in situations where many individual rooms must be controlled separately, such as a hotel. The chilled water can be supplied by a vendors, such as a public utility or created at the location of the building that will use it, which has been the norm.

Chilled water cooling is not very different from typical residential air conditioning where water is pumped from the chiller to the air handler unit to cool the air.

Regardless of who provides it, the chilled water (between 4° and 7°C (39-44 °F)) is pumped through an air handler, which captures the heat from the air, then disperses the air throughout the area to be cooled.

The condenser water absorbs heat from the refrigerant in the condenser barrel of the water chiller, and is then sent via return lines to a cooling tower, which is a heat exchange device used to transfer waste heat to the atmosphere. The extent to which the cooling tower decreases the temperature depends upon the outside temperature, the relative humidity and the atmospheric pressure. The water in the chilled water circuit will be lowered to the Wet-bulb temperature or dry-bulb temperature before proceeding to the water chiller, where it is cooled to between 4° and 7°C and pumped to the air handler, where the cycle is repeated. The equipment required includes chillers, cooling towers, pumps and electrical control equipment. The initial capital outlay for these is substantial and maintenance costs can fluctuate. Adequate space must be included in building design for the physical plant and access to equipment.

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