How much - on-line calculation

Instructions:

Fill in data in applicable white boxes. Press calculate to see the result. Green boxes can also be changed. Small tips will appear when cursors passes the symbol . The yellow field is not to be filled in.
 
  Moisture load calculation
  Desired room climate
  Temperature
șC  
  Relative humidity
%RH  
  Atmospheric pressure
mbar  
  Moisture content:
 
g/kg  
  Ambient design climate Consider how many days you can afford not to have desired room conditions. If the worst case in ten years is considered as dimensioning it will be a significant larger dehumidifier needed compared to a 'normal' design condition.
Dimensioning Average when above desired climate
  Temperature șC
  Relative humidity %RH
  Atmospheric pressure mbar
  Moisture content:
 g/kg
Moisture load from infiltration and ventilation
Warning!
This calculation assumes that the building is sealed in a proper way. Large cracks will give much higher leakage.Walls of un-painted gypsum board or brick will also create much higher leakage.
Room length:  m
 Room width:  m
Room height:  m
Room volume :  m3
Tightness of building Tightness of building, value from 1 up to 10 were: 1 very tight plastic hall, 2 normal plastic hall, 3 concrete building, 4 insulated steel building, 5 insulated wooden building, 6 uninsulated steel building, 7 uninsulated wooden building.
Surroundings                    Set to 1 if inside another building.    
Door without air lock vestibule,height  m
Door without air lock vestibule, width  m Surroundings: From 1 in city to 4 on open ground.
Air lock vestibule, length  m
Air lock vestibule, width  m
Air lock vestibule, height  m
Dimensioning Average
Wind speed  m/s                            Dimensioning wind speed is normally around 8 m/s
Door without air lock, opened per hour  minutes
  Air lock vestibule, passages per hour  times
Infiltration, tightness + door + air lock  m3/h
Open holes                        Deduct covers like plastic curtains from the total hole area.  m2
Needed airflow through the open hole  m3/from room to.....m3/h from room to ambient to prevent opposite flow
Mechanical ventilation     Ventilation for people should be filled in here if not covered by above leakages.  m3/from room to..   m3/h from room to ambient, should normally be 0 m3/h
Total ventilation  m3/h
 Percentage leakage % of room volume per hour
Total load from ventilation m3/h
 
  Personnel in the room
Dimensioning Average
  Number of people  pcs
  Moisture load from each  kg/h
  Total load from people
 kg/h
  Open water surface
Dimensioning Average
  Pool length:  m
  Pool width:  m
  Pool surface :  m2
  Water temperature  șC
  Vaporization coefficient

Total load from water surface

 

 kg/h
  Product drying
Dimensioning Average
  Total weight of products  kg
  Percentage of moisture at start % of the product weight
  Percentage dried in 1 hour % of the moisture content
  Total load from product drying:
 kg/h
  Others
  Total load from other sources  kg/h
 
  Total moisture load: kg/h
  Type of installation

To the right you see a schematic drawing of the installation of a dehumidifier.
A is the total process air flow, i.e. the air flow that enters the dehumidifier.
B is the dry air flow from the dehumidifier. In DR models this differs from A, as a part of the process air is used for regeneration.
C is the amount of air that is re-circulated to the dehumidifier.
D is pre-cooled air fed to the dehumidifier.
E is ambient air to the dehumidifier.
F is pre-cooled air to the room.
G is ambient air to the room, in step 1 called mechanical ventilation.
H is leakage from the room, in step 1 called leakage ventilation.

  Project
  Recusorb Consorb  
  Choosen dehumidifier

  Dehumidifying data

  Process air flow to the dehumidifier
Total process air flow into dehumidifier,__A m3/h   
Return air direct to dehumidifier,__C m3/h
Pre-cooled air,__D m3/h 
Pre-cooling before dehumidifying șC 
Corresponding to g/kg 
Ambient air direct to the dehumidifier,E m3/h
Point A before pre-cooler C
Point A before pre-cooler g/kg
Pre-cooling before dumidifier, A to: C
Process air inlet condition A
Temperature șC
Moisture content g/kg
DR-models only; wet air flow m3/h
Air mixture to the room
Air direct from pre-cooling to the room, F m3/h
Air direct from ambient to the room, G m3/h
Total airflow to the room m3/h
Needed moisture content in the total air mix to the room g/kg
Leakage H  m3/h
Dry air flow, B m3/h
Needed moisture content in the dry air from the dehumidifier, B g/kg
Heat load to the room:
Dry air temperature B șC
Heat load kw
 
Pull down time
Chosen unit:
Starting temperature șC 
Starting relative humidity %RH  
Atmospheric pressure mbar  
Corresponding to g/kg
Capacity at starting climate: kg/h
Final temperature șC 
Final relative humidity %RH  
Atmospheric pressure mbar  
Corresponding to g/kg
Capacity at final climate: kg/h
Resets program to it's inital state.
Partial  time Elapsed time Moisture content in room
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h h g/kg
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