www.condair.co.uk
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PSYCHROMETRIC CHARTSkills Assessment
Normal Temperatures
Barometric Pressures 1013.25 mbar
FOR EXPERT ADVICE ON ANY HUMIDIFICATION
PROJECT CALL +44 (0)1903 850200
IN-DUCT HUMIDIFIERS DIRECT ROOM HUMIDIFIERS PROCESS EXAMPLES
IN-DUCT LOAD CALC
The desired room condition is 50%RH at 25°C. An AHU supplies air at 3m3/s.
80% is re-circulated from the building itself and 20% is fresh air, which is
pre-heated to 25°C (min 20%RH prior to humidifer).
The required humidifer duty is:
Moisture x air vol x fresh air %
Specifc volume
= humidity load
DIRECT ROOM LOAD CALC
The desired room condition is 50%RH at 25°C in a production area of
3,600m3 with 2.5 air changes per hour and a current minimum humidity
of 20%RH.
The required humidifer duty is:
ISOTHERMAL ADIABATIC
ISOTHERMAL ADIABATIC
Condair plc – the new name for JS Humidifers
Artex Avenue, Rustington, Littlehampton, West Sussex, BN16 3LN, UK
Tel: +44 (0)1903 850200 – [email protected] – www.condair.co.uk
Condair RS
resistive steam
Condair SE
steam-to-steam
Condair LS
live steam
Condair EL
electrode boiler steam
Condair GS
gas-fred steam
Condair ESCO
live steam
Condair HP
high pressure spray
Condair ME
evaporative humidifer
Condair DL
hybrid humidifer
JetSpray
compressed air & water spray
ML Princess
high pressure spray
ML Solo
high pressure spray
ML Flex
high pressure spray
JetSpray
compressed air & water spray
Draabe NanoFog Evolution
high pressure spray
Defensor PH
mobile humidifers
Condair RS with fan unit
resistive steam
Condair EL with fan unit
electrode boiler steam
Condair CP3 Mini
low capacity electrode boiler
25
Dry bulb temperature (°C)
Moisture content
kg water/kg dry air
Specifc volume
(m³/kg)
+30%RH
Start 20%RH
25˚C
End 50%RH
25˚C
%RH
50 20
0.004
0.010
0.85
+30%RH
+0.006kg/kg +0.006
kg/kg
25 38
Moisture content
kg water/kg dry air
+30%RH
%RH
50 20
0.004
0.010

+13°C
Start 20%RH
25˚C
End 50%RH
25˚C
Dry bulb temperature (°C)
+0.006
kg/kg
Specifc volume
(m³/kg)
0.85
FREE 1HR IN-HOUSE
CPD SEMINARS
LEARN
HUMIDIFICATION &
PSYCHROMETRICS
VISIT
CONDAIR.CO.UK/CPD
CALCULATE
HUMIDITY LOADS
WITH OUR ONLINE
PSYCHROMETRIC
CALCULATOR
VISIT
CONDAIR.CO.UK/PSYC
FREE RUN COST &
CARBON FOOTPRINT
ANALYSIS
FIND OUT SYSTEM
PAYBACK TIMES
CALL
+44 (0)1903 850200
Moisture x air vol x no. of air changes
Specifc volume
= humidity load
0.006kg/kg x 3m³/s x 3,600 x 0.2
0.85m³/kg
= 15.25kg/h
0.006kg/kg x 3,600m³ x 2.5
0.85m³/kg
= 63.53kg/h
CALC EXAMPLES