Swimming Pools Dehumidification Calculation Sheet

To calculate dehumidification load we have to calculate evaporation from indoor pool surface ,moisture from outside ventilation air and moisture from occupants .

1-from ASHRAE handbook can take evaporation rate from activity factor (AF) depend on application residential or hotel or, ..etc 

2- evaporation rate factor (ERF) depend on swimming pool water temperature and air temperature (lb/hr.sq ft)

3- determine pool area in (sq .ft) 

4- then can calculate evaporation rate (lb/hr) = ERF lb/hr. sq ft X AF X pool area 

5- ventilation moisture = [CFM oa x (grains oa - grains return)]/ 

6- recommended ACH 4-8 for outside air7- for one person calculate btu/ hr latent heat load and calculate enthalpy h(lb/hr).

Download Also: International Swimming Pool and Spa Code and swimming pool design spreadsheet

Swimming Pools Dehumidification Calculation Sheet

Factors are used in calculating evaporation from the swimming pool:

• Water temperature 
• Air temperature 
• Air relative humidity 
• Pool area 
• Saturation vapor pressure taken at surface water temperature 
• Saturation pressure at dew point 
• Level of activity in the pool

Download Swimming Pools Dehumidification Sheet