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not_important
International Hazard
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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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gsd
National Hazard
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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 797 times
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Shingoshi
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My deepest apologies to everyone with whom I previously communicated here. I hope that I will be back for good now.
Shingoshi
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chief
National Hazard
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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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gdflp
Super Moderator
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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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Bert
Super Administrator
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Mood: " I think we are all going to die. I think that love is an illusion. We are flawed, my darling".
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Spam, and deleted!
Rapopart’s Rules for critical commentary:
1. Attempt to re-express your target’s position so clearly, vividly and fairly that your target says: “Thanks, I wish I’d thought of putting it
that way.”
2. List any points of agreement (especially if they are not matters of general or widespread agreement).
3. Mention anything you have learned from your target.
4. Only then are you permitted to say so much as a word of rebuttal or criticism.
Anatol Rapoport was a Russian-born American mathematical psychologist (1911-2007).
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franklyn
International Hazard
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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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Texium
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Thread Moved
22-11-2023 at 19:05 |
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