Dehumidifier and condensate calculator
Cooling air below its dew point drops water out of it, and that water has to go somewhere.
m3/h
g/kg
g/kg
kg/m3
Water removed per day
24.00L
- Per hour
- 2.400
- Per minute
- 40.0
- Per week
- 168.0
- Latent cooling load
- 1633
- Air mass flow
- 600.0 kg/h
Show the working
- Air flow = 500
- Incoming humidity ratio = 12
- Leaving humidity ratio = 8
- Running hours per day = 10
- Air density = 1.2
- Air mass flow = 500 * 1.2 = 600
- removal_g_h = 600 * max(12 - 8, 0) = 2400
- Per hour = 2400 / 1000 = 2.4
- Water removed per day = 2.4 * 10 = 24
- Latent cooling load = 2400 / 3600 * 2450 = 1633.33
- Per week = 24 * 7 = 168
- Per minute = 2.4 * 1000 / 60 = 40
Values are shown to six significant figures here; the arithmetic itself runs on exact fractions and is only rounded where a number is printed.
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The formula
- water removed = air mass flow x change in humidity ratio
- latent load = water removal rate x 2450 kJ per kg of latent heat
Latent load is often half the total cooling load in a humid climate, and it does nothing to the thermometer.