Stirlingengineforum.com

A perpetual machine? Presumably no matter how feeble the engine, it could operate some kind of little air compressor. So some warming and cooling effect above and below ambient should be possible, if for example the engine were started initially by setting it atop a block of ice. Something would ha...

Thanks! very cool.

To Illustrate: LTD_with_air_cycle.gif A simple LTD Stirling with a little air-pump for an air-cycle heating and refrigeration unit. That is of course simplified. The hot and cold heat exchangers would consist of coils of tubing looping around the top and the bottom of the engine rather than straight...

That's a low temperature deferential engine. What kind of power requirement are you talking about? No specific power requirement particularly. Just make the LTD big enough and the air pump small enough that the Stirling Engine can run the air-pump or air compressor. The compressor or air pump doesn...

You have 3 displacers here? No, just one displacer, but it has holes in it. Like this: displacer.gif The regenerator consists of tubes running from top to bottom. You might also want to switch cold and hot ends. My reasoning for having the heat on top is that heat rises. Suggestion. If you get rid ...

Compressing air generates considerable heat. Releasing that compressed air results in cooling.

What I have in mind is to have an LTD type Stirling (Or any Stirling Engine for that matter) power an air-cycle heat pump.

What I had in mind was something like this engine:

https://www.youtube.com/watch?v=ARD3ctp80ac

but I wanted to somehow attach a very small compressor or air pump. Something very simple, similar to a bicycle pump. This type of gearing looks like a very smooth way to accomplish that.

That gearing may very well solve a problem I've been working on. I want to build an LTD type Stirling that will power an air compressor. It would need to be geared down. This type of gearing looks like a very elegant way to accomplish that without a lot of loss due to side load.

I've been thinking about doing something like this to increase surface area and heat transfer between the displacer chamber and the air in the chamber. The regenerator channels are just tubes. There are holes in the displacer, which would have to be rather close fitting to force the air through the ...

https://www.youtube.com/watch?v=vH2WJrq3cw8 There is another similar video: https://www.youtube.com/watch?v=dl_eP3c4gD8 Seems like it could be a good way to convert a reciprocating motion into a rotary motion very effectively as well as vice versa. There appears to be a 2:1 ratio between the inner ...

heat is in a sense literally disappearing. That is, the heat is being converted to electricity by the load on the engine. Assuming the load is an electric generator. Right on. One of the laws of thermal dynamics. Even without a load. Work is being done except the load is on the friction of the slid...

Because energy is present everywhere (except when it is absolute zero). Heat is only one form of it. Keep in mind, they are saying almost 100% is lost through heat, but not 100%. The rest stored in the form of entropy. When you release the gas, the gas gets back some of the lost heat from the conta...

That's interesting Ian. It indicates that the longer dwell of the working gas at the cold end when the engine slows under load has a bigger effect than the longer dwell of the working gas at the hot end. I wonder if it would be a different story in a pressurised engine, where there is greater molec...

If you run the engine without load so that the hot cap is red, then put on a load without changing the heating the temperature will drop, may go from red to black heat as the heat is transferred to the cooling system ... I hope you don't mind my abbreviating your statement but the part above is a v...

I find this interesting: There are several sources stating that as much as 100% of the electrical energy used to compress air in a conventional air compressor is lost as heat and that most of that heat is recoverable. " as much as 100% of the electrical energy used by an industrial air compress...