how fast does a pool of water evaporate inside a house? SOLAR.KnowledgePublications.com

how fast does a pool of water evaporate inside a house?
5 feb 1997
house air at 70 f and 50% relative humidity has a dew point of about 50 f  
(9121/(9121/(70+460)-ln(0.5))-460.) perhaps a pool of water in a 70 f room
gains heat from the room and loses heat by evaporation in equal measure.
a shallow uninsulated pool with about 1 ft^2 of 50 f surface and 1 ft^2 of
bottom exposed to still air might gain about (70f-50f)2ft^2x1.5 = 60 btu/hr
or 1440 btu/day, ie evaporate about 1.4 pounds of water per day, vs a green
plant that evaporates 1 pound of water per day or a person who evaporates
2 or 3 pounds of water per day. that seems high for the pool of water...

insulating the pool or making the sides higher so cool humid air can collect
inside or covering the pool with a lid to raise the relative humidity above
the pool would decrease this loss and evaporation.

nick