Chilled-Water System

Chilled-water systems formulas - evaporator and condenser flow rates

In a chilled-water system the air conditioner cools water down to 40 - 45oF (4 - 7oC). The chilled water is distributed throughout the building in a piping system and connected to air condition cooling units wherever needed.

Total Heat Removed

The total heat removed by air condition chilled-water installation can be expressed as

h = 500 q dt         (1)


h = total heat removed (Btu/h)

q = water flow rate (gal/min)

dt = temperature difference (oF)

Evaporator Flow Rate

The evaporator water flow rate can be expressed as

qe = htons 24 / dt         (2)


qe = evaporator water flow rate (gal/min)

htons = air condition cooling load (tons)

Condenser Flow Rate

The condenser water flow rate can be expressed as

qc = htons 30 / dt         (3)


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

Related Documents

Tag Search

  • en: chilled water cooling load tons evaporator condenser

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