Specifications

24
5.3 Steaminstallation
5.3.1 Positioningandmountingofthesteamdistributionpipes
The location for the steam distribution pipes should be determined at the time of dimensioning the
airconditioningsystem.Pleasenotethefollowinginstructionstoensureproperhumidicationofthe
duct air.
Calculatingthehumidicationdistance
Thewatervapor,emittingfromthesteamdistributionpipes,requiresacertaindistancetobeabsorbed
bytheambientairsothatitisnolongervisibleassteam.Thisdistanceisreferredtoashumidica-
tiondistance“B
N
” and serves as a basis for the determination of the minimum distances from the
upstream components in the system.
Thecalculationofthehumidicationdistance“B
N
” is dependent on several factors. For a rough es-
timationofthehumidicationdistance“B
N
”,thefollowingtableisuseful.Recommendedstandard
valueslistedinthistablearebasedonasupply-airtemperaturerangeof15°Cto30°C.Thevalues
given inboldprintonlyapplytosteamdistributionpipes81-.., the values in brackets apply to
theOptiSorpsteamdistributionsystem.
Input humidity
φ1in%rh
LengthofhumidicationdistanceB
N
in m
Outputhumidityφ2in%rh
40 50 60 70 80 90
5 0.9 (0.22) 1.1 (0.28) 1.4 (0.36) 1.8 (0.48) 2.3 (0.66) 3.5 (1.08)
10 0.8 (0.20) 1.0 (0.26) 1.3 (0.34) 1.7 (0.45) 2.2 (0.64) 3.4 (1.04)
20 0.7 (0.16) 0.9 (0.22) 1.2 (0.30) 1.5 (0.41) 2.1 (0.58) 3.2 (0.96)
30 0.5 (0.10) 0.8 (0.17) 1.0 (0.25) 1.4 (0.36) 1.9 (0.52) 2.9 (0.88)
40 – 0.5 (0.11) 0.8 (0.20) 1.2 (0.30) 1.7 (0.45) 2.7 (0.79)
50 – – 0.5 (0.13) 1.0 (0.24) 1.5 (0.38) 2.4 (0.69)
60 – – – 0.7 (0.16) 1.2 (0.30) 2.1 (0.58)
70 – – – – 0.8 (0.20) 1.7 (0.45)
For duct widths <600 mm the humidication distance forthe OptiSorp system increases by ap-
prox.50%
φ1in%rh: Relativesupplyairhumiditypriortohumidicationatthelowestsupplyairtemperature
φ2in%rh: Relativesupplyairhumidityafterthesteamdistributionpipeatmaximumcapacity
Example
given:φ1=30%rh,φ2=70%rh
humidicationdistanceB
N
: 1.4m (0.36 m for steam distribution system OptiSorp)
Note:Ifthehumidicationdistancehastobereducedfortechnicalreasons,theamountofsteamper
steamoutletmustbedividedbetweentwosteamdistributionpipesorthesteamdistributionsystem
OptiSorp must be used. If this is the case, contact your Condair supplier.
Humidication
distanceB
N
Expansion-andmixingzone
φ1:Incomingairhumiditybeforehumidication
φ2:Airhumidityafterhumidication