[aovaa]

Hello, I am new here and not an expert in this field.

I try to reproduce a small thermal motor. It consists of a U tube that has 2 reservoirs connected by a capillairy tube.
In it are mercury and ammonia.
One reservoir is isolated the other is not.
So when e.g. the temperature goes up the ammonia gas in the reservoir that is not isolated will expand and push the mercury to the other reservoir. And vice versa.

My question is: can I replace ammonia with R22 as this gas seems to have a similar temperature pressure chart. Or are other factors involved, such as more energy needed to expand R22 gas than NH3 gas?

Than you, Adrie

[billnotgatez]

Out of curiosity
If you got the idea from the web, could you post a link?

[aovaa]

Hello,

It is a small thermal motor that drives the Reutter Atmos clock from J.L. Reutter.

In the original glass U tube there is ammonia gas (brought in under vacuum).

As I already have some R 22 freon gas and is easier to work with, I would like to get some expert advise on my question.

Pressure temperature chart is similar.
I do not have enough understanding to see if the energy needed by R22 is similar.

Thanks