Stirlingengineforum.com

I think the question hinges on what actually goes on in the inner workings of a heat engine. The predominant view had always been and to a great extent still is: for a heat engine to operate heat entering the engine must pass through the engine and out the other side, much like water passing through...

I thought I might mention something I've been working on recently and am also curious to know if anyone else here has ever heard of it or done anything with it. https://en.m.wikipedia.org/wiki/Vuilleumier_cycle This "heat pump" is quite interesting. I think the patent is quite facinating a...

Removing heat from the ice is really not a correct statement. If you study how a heat pump or refrigerating system actually works, it is more like the heat is removed during compression of the gas refrigerant. In those days refrigeration was accomplished by compressing air. The old "Cold Air Ma...

Tom I have run my LTD motor on ice, the ambient temperature was 20*C, so there was a 20* (a little less) temperature differential. The but is the amount of energy required to make the ice. You certainly make a valid point. Energy is required to make ice in the first place of course. As quoted above...

OK, so lets say you CAN get a Stirling engine to run on ice with NO or VERY LITTLE waste heat reaching the cold side of the engine. I'm theorizing that a Stirling can possibly be designed in a way where it might not contribute much if any heat to melting the ice,.. might even contribute to keeping t...

Here is why I think this can possibly work. Take a lamina flow type Stirling. Lets say at point "a" of the cycle, air in the cylinder is expanding and pushing the piston out. At some point pressure inside the cylinder and atmospheric pressure outside the cylinder will equalize. But the pis...

I think this is a significant update. I submitted the idea discussed here in this forum to a recent National Geographic Magazine contest. It got through the initial screening process. I've purchased a metal lathe, drill press and other tools and just recently got lucky in finding a place where I can...

This pdf describes air-cycle refrigeration.

http://www.grimsby.ac.uk/documents/frpe ... search.pdf

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 ...

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...

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...

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...

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...

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...

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...