Half a croissant, on a plate, with a sign in front of it saying '50c'
h a l f b a k e r y
Your journey of inspiration and perplexement provides a certain dark frisson.

idea: add, search, annotate, link, view, overview, recent, by name, random

meta: news, help, about, links, report a problem

account: browse anonymously, or get an account and write.



Solar absorption refrigerator

Low-tech solar refrigeration
  [vote for,

Absorption refrigerators are really interesting. It seems counterintuitive that you can use a heat source to drive a cooling cycle, but there are many examples. Caravans and motorhomes often have propane-powered fridges. A small flame drives an evaporation-absorption cycle that removes heat from the interior - see Einstein-Szilárd fridge patent for an example.

Perhaps not a new idea, (I have looked and found people talking about building one) but I’ve not seen one working - I’m sure you’ll all put me right in no time!

A solar collector focuses heat onto a regenerator, driving a (for instance) low-pressure ammonia refrigeration cycle.

No pumps, electronics, moving parts.

Low tech, cheap working fluids, ideal for remote, sunny locations - perhaps temperature-sensitive medical supplies in remote places.

I’m vaguely hoping to build a prototype and produce free build plans for developing nation uses - Apropriate Technology.

Frankx, Oct 15 2019

Please log in.
If you're not logged in, you can see what this page looks like, but you will not be able to add anything.


       Yes, it's Baked. But because of the energy source, it only works effectively for half the day - unless you have something like a molten salt reservoir.   

       That means bulk and cost, to deliver functionality that can be better achieved with a battery, a photovoltaic collector, and a compressor heatpump - which is much more energy-efficient for the same cooling transfer.
8th of 7, Oct 15 2019

       //Appropriate Technology// You need to talk to the Chinese - they've been appropriating technology for a couple of decades now.
MaxwellBuchanan, Oct 15 2019

       [MaxwellBuchanan] I read an article a while ago that suggested that, because of the rampant "reverse engineering" and blatant copying of others' designs, Chinese engineers aren't actually taught how to innovate; and as such, they don't know how to come up with their own original ideas. (It is probably a load of rubbish, but it makes a good story...)
(On that note, I wonder if the Great Firewall of China lets the halfbakery through?)
neutrinos_shadow, Oct 15 2019

       Not now it doesn't.
MaxwellBuchanan, Oct 15 2019

How do you say "Sorry, won't happen again!" in Mandarin?
neutrinos_shadow, Oct 15 2019

       So, we should simply place all of our technological breakthroughs on website servers laced with pro- democracy / Falun Gong / Tibet / Uyghur / Hong Kong freedom movement /Tienanmen Square propaganda...
RayfordSteele, Oct 16 2019


back: main index

business  computer  culture  fashion  food  halfbakery  home  other  product  public  science  sport  vehicle