Basically this is like the recouperator on early heat engines, but with a liquid... | Hacker News

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		hinkley 6 months ago \| parent \| context \| favorite \| on: Japan has opened its first osmotic power plant Basically this is like the recouperator on early heat engines, but with a liquid gradient instead of a thermal one. It's making desalination more efficient and the effluent a bit easier on the ecosystem.

HPsquared 6 months ago [–]

Goes nicely with the "pressure exchanger" which recovers the pressure of the high pressure brine waste stream. Lots of heat exchanger analogies!

https://en.m.wikipedia.org/wiki/Pressure_exchanger

hinkley 6 months ago | [–]

Yeah those are funky devices. I'll be curious to see what the production cost per cubic meter of fresh water ends up at.

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