Half a croissant, on a plate, with a sign in front of it saying '50c'
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Fridge Blimp

Getting the cold down to where it's hot
  (+8, -1)
(+8, -1)
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Inspired by [django] and his congo river-fridge.

It's late and I'm sleep deprived, which means only one thing: post an idea on the HB with one eye (half) open.

Take one large-enough blimp, add tether designed to carry refrigerant in a continuous loop within its insulated cable, bolt some renewable power to the blimp to run a small pump (like wind gen or solar), top off with heat exchangers at either end of the tether.

Launch blimp to a height where things are chilly (and it can support the weight of the tether). Start.

If all goes ok, refrigerant should vapourize when passed through ground-HX, the rush up the tether as a gas where it would be rapidly cooled in the blimp-HX, change phase back into a liquid then run down the tether back to the ground-HX.

People on ground now have a place to put their heat.

TIB, May 07 2008

Stirling blimp Stirling_20High_20Altitude_20Blimp
Shameless blimp-promotion [django, May 07 2008]

Cosmic Background Refrigeration Cosmic_20Background_20Refrigeration
Shameless cooling promotion [BunsenHoneydew, May 21 2008]

[link]






       It would have to go pretty high, but it's a good solution.
wagster, May 07 2008
  

       Interesting concept. The very low temperatures at high altitude can even power a blimp based on a solar dish-coupled stirling engine [see link - but please consult the picture].   

       Alternatively you can store fruits and vegetables in the blimp and bring it down each time you need a banana.
django, May 07 2008
  

       Or train a monkey to climb up and get the banana for you.
wagster, May 07 2008
  

       They will be too busy typing, methinks.
daseva, May 07 2008
  

       Utter genius [+]. I'd like to negotiate a license and/or technology exchange program for your blimp technology to integrate it into my Cosmic Background Refrigeration [link]
BunsenHoneydew, May 21 2008
  

       [+]   

       Is the blimp designed to discard heat by radiation (to the sky), or by conduction/convection (to the surrounding air)?   

       Note that if we can get the blimp up to the stratosphere, and provide radiative insulation (to protect it from the heat of sunlight and earthlight), we should be able to cool even during the day.
goldbb, Oct 26 2009
  

       A good idea, but to be honest, I mainly gave you the croissant for the name. Fridge Blimp. Perhaps it could be built in the shape of a huge cube!   

       "Daddy?" "Yes, Dennis?" "What is that huge cube in the sky?" "Oh but of course Dennis, that huge cube is a fridge blimp!"
Joolin, Oct 29 2009
  

       How much heat can be extracted from the blimp if the atmosphere is thin?
MaxwellBuchanan, Oct 30 2009
  

       I though 'fridge blimp' would be an epithet for a person whose shape was testiment to too close an attachment to said whitegood and its contents.
spidermother, Oct 30 2009
  
      
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