Supermatter engine design and concept.

[Turbonerd]

Chamber

Chamber design is quite simple and easy. 3 by 3. Passive vent in the centre with the supermatter. Unary vents on scrubbing adjacent to the supermatter. Scrubbers diagonal to the supermatter. 3 layers of H/E pipes on SM turf.

The passive vent is better than the unary vent and injector with one reason. It always does a complete heat exchange and equalise into equilibrium. Adjust mole and flow rate to reach same coolant input rate into engine, and you'll be able to put gas in to fill the chamber to the same amount as a unary vent or injector can, but with the added benefit that there is more gas exchanging heat from the left over in the passive vent. A downside to passive vents is it will be less efficient at getting waste removed, but that's usually not a problem.

Unary vents on siphon are extremely powerful. They remove 100% of the gas in their turf every tick in most circumstances. This makes them better than scrubbers when adjacent. In fact, they are so efficient that there will be no gas staying in the adjacent or diagonal parts of the engine, which is why the H/E pipes only stay in the centre. Scrubbers are diagonal because they have an expanded range, and unary vents can't scrub anything if there's no gas in them.

An idea that I haven't tested a lot is using turbines instead of unary vents. You could get 4 gas turbines surrounding the SM, with a very high intake rate (could be like 99%. 100% could cause problems, but you can try it). Then unary vents scrubbing on turbine output. This might be faster than waiting for gas to get shared to unary vent turfs and scrubbers only scrubbing 8% per tick each.

Spaghetti

The piping and design can be quite simple. The main pipenet will be designated as the pipenet that comes after scrubbed gas. Input pipenet designated as the pipenet that leads to the passive vent. Thermomachines are far more efficient than H/E pipes in space when the thermomachines are upgraded.

The main pipenet will be filled with lots of thermomachines. Having multiple filters can help make things move into input pipenet faster. The filtered gases will lead the the input pipenet, while the rest will stay in the main pipenet. Lots of plasma (freon and hypernoblium is better, but that's overkill in most cases) will get pumped into the main pipenet, and stay there as a thermal reservoir. The more thermal energy there is from the temperature delta of thermomachine target and gas temperature there is, the more efficient the thermomachine gets. A higher heat capacity means a lower temperature will be achieved for the same thermomachine efficiency.

Thermomachine nonsense and how it works:

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Thermomachines work as a heat exchanger for an imaginary object with a temperature of thermomachine temperature and heat capacity of thermomachine heat capacity. Space heat exchange works the same, with a temperature of 2.7K, and some weird temperature delta limit thing that orevents it getting lower than 22.7K.

Space H/E only has a heat capacity of 7.5kJ. A thermomachine with tier 4 matter bins has a heat capacity of 225kJ, wow! Thermomachine heat transfer thing is basically just sharing the energy of the gas inside it and the imaginary object. The object does not change temperature. Because of this, the higher the heat capacity of the gas mixture inside it is, the more thermal energy it will remove at the same temperature, making the thermomachine more efficient.

This efficiency converges to its limit the higher the heat capacity of the gas mixture is. A max tier thermomachine can remove 225kJ per Kelvin of temperature difference at maximum efficiency. A gas mixture with the same heat capacity as the thermomachine means it operates at 50% of its maximum efficiency.

The input pipeline will be short and simple. It goes from filters, and leads to passive vent. For all the pipenets, you want to use as least pipes as possible, but as much thermomachines and filters as possible. Aim for a low pipe composition. Upscaling means you want more gas to be efficient. More filters can help get more gas into the chamber without the need to put more gas in.

For chamber H/E pipenet, really you just want a design to maximise the thermomachine to pipe ratio. As much plasma in as possible.

Conclusion

Well that's it, lol. There isn't really a wind simulation, so there isn't that much more depth that can be used for engine designs. I hope someone can talk about more creative designs for supermatter engines.