This pdf describes air-cycle refrigeration.
http://www.grimsby.ac.uk/documents/frpe ... search.pdf
Search found 3301 matches
- Sun Oct 16, 2016 3:09 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's Heat Engine
- Replies: 19
- Views: 18672
- Sun Oct 16, 2016 2:57 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's Heat Engine
- Replies: 19
- Views: 18672
Re: Tesla's Heat Engine
Sounds to me like you are talking about a variation on what is currently known as an "Air Source Heat Pump" I can't say I understand it well enough though, to do the maths to check whether it is theoretically possible or not. Well.. I think "air source" just refers to where the ...
- Thu Oct 06, 2016 6:02 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Burnt pancake displacer (carbon foam)
- Replies: 10
- Views: 14309
Re: Burnt pancake displacer (carbon foam)
Some interesting info regarding the heat conductivity of various carbon materials. Very variable depending on how it is made. Interesting that pyrolytic carbon is or can be MORE heat conductive than copper by a factor of 5X. http://www.christinedemerchant.com/carbon_characteristics_heat_conductivity...
- Thu Oct 06, 2016 1:58 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Burnt pancake displacer (carbon foam)
- Replies: 10
- Views: 14309
Re: Burnt pancake displacer (carbon foam)
One other thing. It's quite possible that starch is not the culprit as far as chalkiness goes. Possibly the opposite as some bread recipies call for added corn starch to make the dough more plastic and give the bread a better texture. The corn starch heated with some water seperately to make a goo w...
- Thu Oct 06, 2016 10:19 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Burnt pancake displacer (carbon foam)
- Replies: 10
- Views: 14309
Re: Burnt pancake displacer (carbon foam)
The white bread hamberger bun was not very permeable. Not much air could get through. Some made out of a whole grain slice of bread ended up with very open pores that air could very easily flow through. It does also seem that various similar carbon fiber/mesh materials have been used as regenerators...
- Tue Oct 04, 2016 2:38 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Burnt pancake displacer (carbon foam)
- Replies: 10
- Views: 14309
Burnt pancake displacer (carbon foam)
Recently I've been re-researching what sturdy lightweight materials might be used for an LTD displacer. The engine I got from amazon had some black foam rubber type displacer that shrunk and warped when I tried to run it on top of my wood stove for a few minutes just to see how fast it might go. The...
- Sun Sep 18, 2016 6:19 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's Heat Engine
- Replies: 19
- Views: 18672
Re: Tesla's Heat Engine
Looks like a variation on the "Icy Ball" ammonia absorption refrigerator. https://youtu.be/jA6UBKi13BY As some here may be aware I've previously posted about the possibility of a heat engine running on ambient heat. Tesla worked on building such an engine........ . Take a look at Robert mu...
- Wed Aug 17, 2016 11:34 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's "Ambient Heat Engine" Experiment
- Replies: 175
- Views: 182631
Re: Tesla's "Ambient Heat Engine" Experiment
I will be continuing research on Tesla's theory and I will be building a prototype. Hopefully a WORKING proof of concept model, but I can't give any guarantee of that at this point of course. I do think that there is a chance of it actually working or, naturally I wouldn't bother. If anyone would li...
- Wed Aug 17, 2016 11:24 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's Heat Engine
- Replies: 19
- Views: 18672
Re: Tesla's Heat Engine
I'm going to be doing my best to put together a heat engine based on the principles Tesla described in his article, though probably not a replica since as far as I know, nobody knows what Tesla's engine might have looked like and it is debatable if any kind of prototype ever existed. Regardless I'm ...
- Tue Jun 21, 2016 12:50 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's Heat Engine
- Replies: 19
- Views: 18672
Re: Tesla's Heat Engine
Ordinary glass I don't think will transmit infrared light. It is possible to get such glass. The articles about it say that it needs to have "direct exposure to the sky. Apparently it would not work inside a building but only on the roof. Putting it inside anything to thermally isolate it could...
- Mon Jun 20, 2016 11:54 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: How do i make a linkage like this:
- Replies: 6
- Views: 6779
Re: How do i make a linkage like this:
It looks like it was made out of some parts from some old shock absorbers. Possibly off a motorcycle.
- Mon Jun 20, 2016 7:17 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's Heat Engine
- Replies: 19
- Views: 18672
Re: Tesla's Heat Engine
Hmmm... I wouldn't believe anything I couldn't get my own hands on. That said, I've been following something called "photonic radiant cooling" which has applications in air conditioning. It is a method of making a surface 'see' space by matching the frequency of the atmosphere or some suc...
- Mon Jun 20, 2016 3:11 pm
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's Heat Engine
- Replies: 19
- Views: 18672
Re: Tesla's Heat Engine
The photonic radiant cooling is, to say the leas, interesting. If this material is 9 degrees cooler than ambient air by virtue of just sitting there radiating heat into space one would think it could be put on the top of one of those "ultra LTD" Stirling engines and have it running with no...
- Mon Jun 20, 2016 8:41 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's Heat Engine
- Replies: 19
- Views: 18672
Re: Tesla's Heat Engine
Have you ever heard of Charles Tripler ? He had, back in 1890 come up with a way to make liquid air by the barrel full and found that he could use the liquid air to run a steam engine to drive an air compressor to make more liquid air. He was able to use 3 gallons of liquid air in his machine to mak...
- Mon Jun 20, 2016 1:25 am
- Forum: Stirling and "Hot Air" Engine Forum
- Topic: Tesla's Heat Engine
- Replies: 19
- Views: 18672
Re: Tesla's Heat Engine
After studying all the elements that went into cycling ambient air through this machine and putting it all together in a way that made sense to me, based on basic principles, I imagine the air being cycled this way: Ambient air is drawn in by means of some form of air pump/compressor. The air taken ...