First SPOM(Self Powered Oxygen Maker)

This SPOM takes water and produces Oxygen and Power(and Hydrogen eventually if excess power is not used).

It is fully self-sustaining with hydrogen from the electrolysis fully powering the device.

This is done by having an advanced design filtration system to remove the oxygen from the flow such that a costly filter(at 120 W) is not needed.

Automation logic is in place to stop the pumping if the oxygen output buffer is backed up, and to resume when it is clear. This is to stop the hydrogen generator being damaged by wrong element, and in general to stop the device when it is not being used.

Automation logic is in place to open the device to the power grid when the excess power in the batteries reaches a certain level, and to close it again later. This allows the SPOM to contribute it's excess power to your base's power grid without worrying about it being sucked dry or damaged by base-wide low power events and having to be re-initialised. Once switched on and as long as it has enough water it will always work.

Very simple so just get it done first, water is pumped into the electrolyser, nothing complex there. Just a basic water input. Only clean water can be used.

If water is input at greater than 19.45 Deg C the device will generate a net heat deletion.
if water is input at less than 19.45 Deg C the device will generate a net heat increase.

Electrical system is pretty basic with some automation to help it along.
2 Batteries as we need 2 signal outputs, one for out hydrogen generator to keep the batteries topped up, the other to send a signal to allow the SPOM to contribute to base power. There is a circuit breaker attached to this battery. Level can be configured but I set it to 75%.

First there is the hydrogen system. H2 bypasses the oxygen filter and goes to it's storage tank where it then powers the H2 generator. H2 WILL ACCUMULATE unless SPOM excess power is being used by the base which is why the storage tank and overflow valve are there. In this design H2 overflow is just vented, though in a real design it can be put somewhere useful.

Oxygen system really is in a few parts.

1. There is the filter which takes the oxygen out as it goes past, uses the beautiful power-free filter trick, which does have some drawbacks over a powered filter in that it will not stop oxygen progressing(in this case onto the H2 generator) if the receiving end is backed up. We solve this in:
2. Oxygen shutoff mechanism, if the oxygen is backed up and flows through the backup pipe, the oxygen gas sensor will trigger. This stops the pump from working until the backup is over(second sensor). There is also an atmospheric sensor that is AND gated with this system so that the system shuts off if water is no longer available. Makes the whole thing fully self-contained and requiring no Dupe operation.
3. Storage and backup. Large storage tank as a buffer, very useful as we dont want temporary disruptions in O2 consumer demand to trigger the shutoff mechanism(above), which is a risk without this gas tank. Does job of any other capacitor otherwise, good to have things like this in a lot of places of course.

So I am pretty happy with this, especially as a first try(for me) of a SPOM design.

Some improvements I can see already, most notably I would like a power station there and some pretty things for the dupes to operate it, and that being only place in SPOM they need to go.

Most likely some other things too as time goes on.

I do hope this design is useful/inspiring to someone.

Gavin786