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Passive refrigerator--in Nature and in MIT News

 
Joshua Myrvaagnes
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Location: Massachusetts, 5a, flat 4 acres; 40" year-round fairly even
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Mind blown.  Cooling by as much as 40C below ambient temperature in dry climates.  Allows emission in infrared rays.

Thoughts?
IMG_20190305_225233839.jpg
[Thumbnail for IMG_20190305_225233839.jpg]

10 humans raise one child https://www.kickstarter.com/projects/positiverealfutures/an-actually-fun-tv-show-about-a-future-with-real-hope

 
frank li
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A heat transducer....?  I have no idea what to call it, but its cool that it can exploit lowering resistance to heat loss by selective radiation. A reverse selective absorber like solar thermal absorbers.

Always cool when a materials arrangement can do work without moving parts. High technology if it is practical and works.
 
C. Letellier
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link to article

Country oriented nerd with primary interests in alternate energy in particular solar. Dabble in gardening, trees, cob, soil building and a host of others.

 
How do they get the deer to cross at the signs? Or to read this tiny ad?
Infographic to consider the best heat - all costs
https://permies.com/w/heat
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