Solar cooling [RE-wrenches]

sunwise at cheqnet.net sunwise at cheqnet.net
Thu Apr 19 10:07:12 PDT 2001


Dana Orzel wrote:
> 
> Hello all,
> Has anyone had any good experiences or know of a contact/contacts for
> some good ideas for geo cooling earth to radiant floor?

> Or reverse radiant floor to the solar panels to cool at night?

Hello Dana,

While we can all agree that cooling the slab below dew-point will result
in condensation, I really like the idea of reverse flow at night.  I
think a lot of heat could be removed from the slab without taking it
down to the dew point, especially at 5,000ft el. where cool nites and
low humidity probably exists.  The ammount of heat in the thermal mass
and the size of the mass are important factors and may make it difficult
for the panels to dissipate enough heat over night to bring it down
towards the dew-point anyway.  Most slabs get some unwanted solar gain
during the day and radiating that energy out into space on a clear cool
night makes a lot of sense to me.  A slab temp sensor could be included
in the system and could perhaps even be combined with a humidity sesnsor
in a smart control that shouldn't be that hard to come by/put together.  

If heat removal does get incorporated into this slab, it would be nice
to hear how things work out -- Kurt Nelson

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