re: cold, damp cottage SOLAR.KnowledgePublications.com

re: cold, damp cottage
2 dec 2001
how much licl would you need to keep warm from november to february? 
you might create a 50% solution in a leisurely way over the other 8
months by dribbling it over a roof and collecting it in a gutter and
tank, then expose it to room air indoors and let it dilute to 33%
with water vapor from the basement floor, as a chemical heat pump.

if our 24' r48 cubical cottage with 60 btu/h-f needs 24(65-30)60 = 50k
btu/day, we absorb 50 pounds of water (ignoring the heat of solution),
so 120 days requires about 6,000 pounds of water, eg a 6' cube, including
the starting solution... 3,000 pounds of 2:1 cacl2/licl costs about $5k. 

that's a lot. maybe it's better to pump the solution from the sunny
location 250 meters away, with no loss of heat in the hoses :-)

nick