Water Evaporator and Condenser Equations

Air condition load, evaporator and condenser water flow rate

The total heat can be expressed as:

h = cp ρ q dt

    = 500 q dt         (1)


h = heat load (Btu/h)

cp = 1 (Btu/lbm oF) for water

ρ = 8.33 (lbm/gal) for water

q = water volume flow rate (gal/min)

dt = temperature difference (oF)

Evaporator water flow rate can be expressed as

qevap = 24 hevap / dt         (2)


qevap = evaporator water flow rate (gallons per minute - gpm)

hevap = air condition load (1 refrigeration ton = 1 TONScond = 12,000 Btu/h = 200 Btu/min = 3,025.9 k Calories/h = 12,661 kJ/h  = 3517 kJ/s = 3517 kW = 4713 HP )

Condenser water flow rate can be expressed as

qcond = 30 hcond / dt         (3)


qcond = condenser water flow rate (gallons per minute - gpm)

hcond = air condition load, chiller tonnage (1 cooling tower ton = 1 TONSevap = 1 TONScond x 1.25 = 15,000 Btu/h = 3,782 k Calories/h = 15,826 kJ/h)

Related Topics

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

Related Documents

Tag Search

  • en: evaporator condeser heat water load tons

Search the Engineering ToolBox

- "Search is the most efficient way to navigate the Engineering ToolBox!"

Engineering ToolBox - SketchUp Extension - Online 3D modeling!

3D Engineering ToolBox Extension to SketchUp - add parametric components to your SketchUp model

Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your SketchUp model with the Engineering ToolBox - SketchUp Extension/Plugin - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro . Add the Engineering ToolBox extension to your SketchUp from the Sketchup Extension Warehouse!

Translate the Engineering ToolBox!
About the Engineering ToolBox!

Support the ToolBox

If you find the Engineering ToolBox useful and want this website to be available tomorrow - and the days after tomorrow - enable ads or make a contribution!

Contribute to the Engineering ToolBox