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[–] 85 points 4 months ago (16 children)

The idea .....

Send water on a 150 million kilometer pipeline to the sun to super heat it ... then pipe the steam back to power a turbine

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  • [–] 48 points 4 months ago (7 children)
  • [–] 57 points 4 months ago (5 children)
  • [–] 16 points 4 months ago (3 children)

    I don't know why you made me laugh so much, thanks for that post.

    I think it's because it turns the concept into something so low tech and banal

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    [–] 55 points 4 months ago (4 children)

    Nuclear power is just steampunk with magic rocks.

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  • [–] 26 points 4 months ago (3 children)
  • [–] 38 points 4 months ago (9 children)

    I'm an EE by schooling and I've worked in both gas turbine and wind power. Photovoltaics blow my fucking mind. Everything else is just spinning magnets to extract power. PVs are insanely cool

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  • [–] 16 points 4 months ago (5 children)

    Take a look at reverse electro-dialysis.

    It's pushing thermal energy into electricity directly by the force of entropy.

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  • [–] 9 points 4 months ago (1 child)
  • [–] 7 points 4 months ago* (last edited 4 months ago)

    Entropy is maximized by turning heat into electricity, so electricity appears on the device, as it gets cooler (by a tiny amount).

    EDIT: I just noticed that you may be asking about the "reverse electro-dialysis" part :)

    It's a process where fresh and salty water enter a machine, and they get mixed while generating electricity. It's the reverse of this:

    https://en.wikipedia.org/wiki/Electrodialysis

    That runs on the same conceptual machine.

    (And oh, looks like it's written together.)

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  • [–] 36 points 4 months ago* (9 children)

    I actually don't know why people get so hung up on this. When you are making energy it's easiest to make heat, and boiling water through a turbine is a really efficient way to turn heat into motion and we're really good at doing it and turning motion into electricity. The fact that multiple ways of making heat exist is not surprising, the fact that different methods of making heat use the same, most efficient, well understood method for turning heat into electricity is even less surprising.

    If we develop a more efficient way to turn heat into electricity it won't be "a new way to make energy" it will be "a new more efficient heat engine"

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  • [–] 6 points 4 months ago (6 children)

    Because it feels archaic and inefficient, maybe?

    We also have developed solar panels, wind turbines, hydro-electric dams as well as tidal/wave energy devices in the intervening years - so adding another method to boil water just feels “outdated”.

    I’m not trying to cast judgement myself, just trying to explain that it feels like it’s just “vibes based”.

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  • [–] 13 points 4 months ago

    Take a look at a modern supercritical steam turbine, this thing can run on 600C steam. there's nothing archaic about it (it can be more efficient as a part of combined cycle)

    Hydropower and windmills are older than steam

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  • [–] 4 points 4 months ago* (1 child)

    The problem is there’s an upper limit on how much useful energy you can extract from a heat engine.

    https://en.wikipedia.org/wiki/Carnot_cycle

    1 - Tc/Th

    The only 100% efficient heat exchanger has a cold side at absolute zero.

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  • [–] 21 points 4 months ago (11 children)
  • [–] 10 points 4 months ago (7 children)
  • [–] 20 points 4 months ago (6 children)

    No, wind is spinning magnets. Everything except photovoltaics and fuel cells is spinning magnets. (Everything with boiling water is also spinning magnets)

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  • [+] 14 points 4 months ago* (last edited 3 months ago) (1 child)
  • [–] 5 points 4 months ago

    Those systems are interesting, but also nightmares to build and maintain.

    Supercritical co2 is a powerful solvent and can corrode most metals.this problem is worse when you increase the temperature.

    Material scientists are working on it, but so far, the few test systems that have been built can't quite live up to the hype.

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  • [–] 12 points 4 months ago

    "I have an idea for a comic!"

    "Is it you getting angry and sulking on the couch?"

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  • [–] 9 points 4 months ago (1 child)

    What's the original comic?

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  • [–] 8 points 4 months ago* (last edited 4 months ago) (1 child)

    Boil water and spin magnets

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    [–] 8 points 4 months ago (3 children)

    Well when you invent a new way to convert rotational energy into multi-phase AC please let us all know

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    [–] 7 points 4 months ago
    [–] 4 points 4 months ago

    Turbine go vrrrrrr

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