Cooling BTU's

[hierony]

Not really the time of year for cooling anymore, but there is a way to have solar-powered cooling. It's called Adsorption Chillers--works on basic refrigeration principles but the cooling power comes from adsorbing water onto/into an adsorbent (usually zeolite), with the required energy/heat coming from solar (heat). There should be a commercial product somewhere; there have been several well-documented large-scale industrial applications--a school or such in Germany or Zurich I think.

If you're more DIY, this place has some good links as a starting place.