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Engineering ToolBox > Chilled-Water System
In a chilled-water system the air conditioner cools water to between 40 and 45oF (4 and 7oC). The chilled water is distributed throughout the building in a piping system and connected to air condition cooling units wherever needed.
The total heat removed by air condition chilled-water installation can be expressed as
h = 500 q dt (1)
where
h = total heat removed (Btu/h)
q = water flow rate (gal/min)
dt = temperature difference (oF)
The evaporator water flow rate can be expressed as
qe = htons 24 / dt (2)
where
qe = evaporator water flow rate (gal/min)
htons = air condition cooling load (tons)
The condenser water flow rate can be expressed as
qc = htons 30 / dt (2)
where
qc = condenser water flow rate (gal/min)
htons = air condition cooling load (tons)