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i want to know if an Archimedes screw pump is more eficent that a modern screw pump to elevete clean waters 4 meters i saw many modern screw pumps smaller and want to now about the efcency of ths two types.

enter image description here

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    $\begingroup$ Does Archimedes still sell them? $\endgroup$
    – Solar Mike
    Sep 6 '20 at 13:47
  • $\begingroup$ If Archimedes was the most efficient method and any patent is expired, why would this pump exist? $\endgroup$ Sep 6 '20 at 16:43
  • $\begingroup$ totally different beast from an Archimedes (or auger pump. ) Is is this a pressuer pipe application or are both water levels free (open to air)? What is the approximate flowrate? Much variation in this flowrate? $\endgroup$
    – mart
    Sep 7 '20 at 6:18
  • $\begingroup$ this is an explanation of an archimed pump: engineering.stackexchange.com/questions/1958/… $\endgroup$
    – mart
    Sep 7 '20 at 6:19
  • $\begingroup$ good help thancs $\endgroup$
    – gusgus
    Sep 8 '20 at 18:53
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That looks like a Moyno, The rubber stator or shell makes it dramatically more efficient than a basic Archimedes type. Moynos develop significant pressure which is not possible in Archimedes.

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I did a reverse image search, and it seems -- like blacksmith37 said -- that it's a progressive cavity Mono™ pump (or MOYNO™ for the Americas [no citation]). This is most likely where the image came from, and here are the specifics for that pump. Apparently, it specializes in viscous and chunky fluids. It seems pretty nice to me, but then again I'm not a pump expert.

My guess is that because it is an all-purpose, chunky-fluid, non-clogging pipe, it may be less power-efficient (or, more likely, less power-efficient per cost, as it may be more expensive) than the best models for clean water because of its generality. I don't know what screw pumps you're looking at, but if they're smaller and cheaper than this and will work just as well in clean water, then go for it. And besides, any energy inefficiency is just a drop in the bucket of our bulky SUVs, Stirling engines, and burning oil wells.

Oh, and if I made a mistake, or you have more information, please comment! Thank you!

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  • $\begingroup$ @mart Ooookay... I'll pretend to understand that. $\endgroup$
    – Palbitt
    Sep 8 '20 at 17:31
  • $\begingroup$ very clear thancs . t s a good help´for me $\endgroup$
    – gusgus
    Sep 8 '20 at 18:54
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    $\begingroup$ @mart Whoopsies! Corrected now. Thank you. $\endgroup$
    – Palbitt
    Sep 8 '20 at 19:22

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