Chilled-Water Systems

Chilled-water systems equations - evaporator and condenser flow rates

In chilled-water systems air conditioners cools down the water to 40 - 45oF (4 - 7oC). The chilled water is distributed throughout the buildings or locations in piping systems and connected to air condition cooling units wherever needed.

Total Heat Removed

The total heat removed by an air condition chilled-water installation:

h = 500 q dt         (1)

where

h = total heat removed (Btu/h)

q = water flow rate (gal/min)

dt = temperature difference (oF)

Evaporator Flow Rate

The evaporator water flow rate:

qe = htons 24 / dt         (2)

where

qe = evaporator water flow rate (gal/min)

htons = air condition cooling load (tons)

Condenser Flow Rate

The condenser water flow rate:

qc = htons 30 / dt         (3)

where

qc = condenser water flow rate (gal/min)

htons = air condition cooling load, chiller tonnage(tons)

Related Topics

  • Air Conditioning - Air Conditioning systems - heating, cooling and dehumidification of indoor air for thermal comfort

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