Pneumatic Simulation

Is this device intended to generate more gas from the "compressor" than is consumed to run the "engine"?

If yes, I have bad news.

If no, just assume about 60% overall efficiency.

No there is no over unity involved but the second cylinder being larger by about 33% is designed to scavenge to first cylinder partially to prevent a balanced condition that would render it motionless.

Then, what's the use?

If it is, "designed to scavenge to first cylinder partially" 33% of the gas you're back to zero, minus friction loses.

The intended use is not of concern and I can change to 33% up or down by altering the size of the cylinder in question. All I would like to know is the data from a simulation. I think I will attach some pressure gauges and run it off shop air but I will have to program the PLC first for multiple cycles.

Hydraulic, Pneumatic, and Motion Control Design and ...

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Good luck.

How rude. Concern is what makes us helpful.

You need to explain what this contraption is supposed to do, Mildred, just in case there is an easier way of doing it.

Thanks Everyone for the input I have decided due to complexity of the issue to complete the plc programming and perform some bench testing using the hands on protocols that have served me well in past projects. Sorry to offend some by not disclosing the final use but that is the nature of the beast at this time however I will be back with an update hopefully in the very near future.

If you really need a full program to simulate or only a spread sheet depends on the complexity of your system and of the dynamic behavior you aim at.

If you want a dynamic simulation I think the best available soft is "open modelica" which a free soft for general dynamic simulation and which has components as cylinders piping and valves. There are components for peumatics too. The problem with gases is that not only they are compressible but also have a different behavior at a restriction function of the pressure drop and last but not least depending on the pressure change velocity.

If you want some support you may use the private channel for a better definition of what you have as system and what you want to know.

You would be far better off looking into existing SCC engine. Supercritical carbon dioxide has a great amount of exergy present (energy fraction available to perform reversible work). And low grade solar heat can be utilized as the primary energy source. I have heard of one such engine running on the hot brine from a solar gradient pond, where the hot liquid is applied to cylinder jacket, then cold water is applied in succession to produce expansion and contraction. The engine drives hydraulic system that operates seawater RO pumps.

Thanks for the info I will archive it for future use. There are tremendous possibilities utilizing CO2 for heat ( energy) absorption and the real increase in pressure creates some fantastic opportunities.