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I need to find a good gas for a stirling engine.?
I am building a stirling engine for a project, and I am looking to fill a closed cylinder with this gas. It would be nice if it was non-reactive (at least not with hydraulic oil and aluminum), won't dissolve into hydraulic oil, rather inexpensive, transfers heat well, and is available. Also, with any suggestions, I need to know if there is a difference in the expansion rate at different temperatures. If it doubles it's volume once it hits x degrees, that would be a fabulous bit of information!
Thanks for your help!
3 Answers
- Anonymous1 decade agoFavorite Answer
Yes - use helium. Its available in party balloon gas cylinders.
It lifted my 50mm diameter Alpha from 650rpm to 1000rpm free running.
The downside is sealing it into the crankcase.
You will need a low friction seal on the shaft where it exits from the crankcase
PV=nRT and pv**gamma=k
used with Schmidt analysis is the start point
Source(s): Personal experience - ?Lv 71 decade ago
helium should be a good gas, it transfers heat well, is non-explosive and has less density than air (good for reducing friction losses). When I worked at a large gas fired power plant, hydrogen was the gas of choice for cooling the 350 megawatt generator. We we instructed on safety measures dealing with the hydrogen sealing system.
