Condair CP3 - 5.3.2 Positioning and mounting of the steam distribution pipes

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The calculation of the humidication distance “B
N
” is dependent on several factors. For a rough
estimation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 type only apply to steam distribution pipes 41-..., 61-... and 81-..., the values in
brackets apply to the OptiSorp steam distribution system.
Humidity at inlet
φ1in%rh
LengthofhumidicationdistanceB
N
in m
 Humidityatoutlet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approx.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 basic unit 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.
5.3.2 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conditioningsystem.Pleasenotethefollowinginstructionstoensureproperhumidicationofthe
duct air.
Calculatingthehumidicationdistance
The water vapour, 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cationdistance“B
N
”andservesasabasisforthedeterminationoftheminimumdistances
fromtheupstreamcomponentsinthesystem.
Humidication
distanceB
N
Expansion and mixing zone
φ1:Supplyairhumiditybeforehumidication
φ2:Supplyairhumidityafterhumidication