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Author: Subject: Did you ever hear of Einstein's Refrigerator?
not_important
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[*] posted on 26-4-2008 at 23:57


Vortex tubes are used commercially in plants that already use compressed air extensively. They tend to be rather noisy, and not really efficient, but are fairly compact and as they don't have moving parts are handy for difficult to access areas.

You're not going to get above the Carnot limit on the heat-engine type coolers. When heat is the driving force, as in the E-L coolers, the rejected heat is of lower grade than the heat used to separate ammonia and water. So you have the heat transfered from the cold spot plus the heat used to drive the refrigerator, which must be removed at a lower temperature than the heater. So X watts pumped out at 0 C, Y watts at 80 C to separate NH3, giving X+Y watts at say 40 C that must be removed.

The E-L coolers are not going to do do anything that a conventional compressor can't do. The big advantage of them is that they do not have moving parts. They are less efficient than conventional coolers, and have more restricted temperature ranges due to the requirements of the working fluids.
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[*] posted on 27-4-2008 at 07:19
DESIGN ANALYSIS OF THE EINSTEIN REFRIGERATION CYCLE


I stumbled upon these two interesting documents on this subject

First one is a short report which is attached herewith, while second one is a dissertation uploaded to : http://ifile.it/5oikzpg

gsd

Attachment: DESIGN ANALYSIS OF THE EINSTEIN REFRIGERATION CYCLE.pdf (240kB)
This file has been downloaded 790 times

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[*] posted on 14-11-2008 at 23:32


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[*] posted on 15-11-2008 at 05:14


In the past times so-calle cold-mixtures were used:
==> ice + a very soluble salt (in mol/liter)
==> eg. ice + NH4NO3 gives a stable temperature at -55 Celsius

The temp can be calculated by the clausius-clapeyron-equation; maybe NaClO4 performs even better ?? NaCl gives -21 Cels.

Besides: A standard-refrigerator goes down to - 34 Cels (I have 2 of that sort), if the temp-controller is defective and the compressor runs continuously ...
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[*] posted on 16-1-2015 at 06:56


Interesting, is this spam or the wrong thread? I'm guessing it's the former and if so, it's the most coherent spam I've seen.
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[*] posted on 16-1-2015 at 07:25


Spam, and deleted!



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[*] posted on 17-1-2015 at 00:28


http://www.n-atlantis.com/Einstein_fridge.htm

Being awarded a patent does not preclude that it is an attributed achievement resulting from collaborated effort or other contribution not cited.

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