Search...
Home Subscribe
Pie
Home Subscribe
Recent topics Flagged topics Hot topics Best topics
Search...
Search within solar Search permies
Advanced search Google search
Register / Login
Clean with Cleaners You Can Eat - Free ebook Green Living Book with pie you get 2 thumbs up and 1 thumbs down Free heat movie Master Gardener Program
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
permaculture forums growies critters building homesteading energy monies kitchen purity ungarbage community wilderness fiber arts art permaculture artisans regional education skip experiences global resources cider press projects digital market permies.com pie forums private forums all forums
Free heat permaculture bootcamp sketch of boots Sepp Holzer Desert or Paradise Documentary Permies Book Reviews SKIP=SKills to Inherit Property PEP woodworking Permaculture Experience According to Paul
this forum made possible by our volunteer staff, including ...
master stewards:
  • Carla Burke
  • John F Dean
  • Nancy Reading
  • r ransom
  • Jay Angler
  • Timothy Norton
stewards:
  • paul wheaton
  • Pearl Sutton
  • Anne Miller
master gardeners:
  • Christopher Weeks
  • M Ljin
gardeners:
  • Jim Garlits
  • thomas rubino
  • William Bronson

Passive refrigerator--in Nature and in MIT News

 
Joshua Myrvaagnes
pollinator
Posts: 2254
Location: Massachusetts, 5a, flat 4 acres; 40" year-round fairly even
322
6
I like...
kids purity trees urban writing
posted 7 years ago
  • Likes 2
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
    Send
  • Quote
  • Report post to moderator
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
Posts: 600
Location: Michigan
40
posted 7 years ago
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
    Send
  • Quote
  • Report post to moderator
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
pollinator
Posts: 1200
Location: Greybull WY north central WY zone 4 bordering on 3
370
I like...
hugelkultur trees solar woodworking composting homestead
posted 7 years ago
  • Likes 1
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
    Send
  • Quote
  • Report post to moderator
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.

 
I'm thinking about a new battle cry. Maybe "Not in the face! Not in the face!" Any thoughts tiny ad?
Gardening and natural building at a delightful pace
https://wheaton-labs.com/bootcamp
reply
reply
    Bookmark Topic Watch Topic
  • New Topic
Boost this thread!
Similar Threads
More...