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stmbtwle

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Reply with quote  #11 
Yes I see that. The original link wasn't very good at explaining it.

I think it's the same as this, just a different application: https://en.m.wikipedia.org/wiki/Injector

http://www.mekanizmalar.com/how-steam-injectors-work.html

It's been around since 1858.

While it works for putting water into a boiler, I still have reservations as to it's efficiency, as it seems to me it wastes a certain amount of steam through the overflow.

The ad talks about thrust. As a propulsion device I can't see the point, as you still have the weight of the steam generator. As the nozzle in a steam turbine, maybe.

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Willie, Tampa Bay

RevI

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Reply with quote  #12 
No, This is neither liquid jet, nor steam jet injector. In the injectors, either the liquid or the gaseous fluid has higher pressure and the discharge pressure is something in between the two depending on the mixing ratio. But, in this technology, the exhaust pressure is higher than both the input. Drastically different.
stmbtwle

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Reply with quote  #13 
Then I have no clue, though according to the diagrams they're quite similar and I suspect use the same Bernoulli principles though to different ends. I was under the impression that the inlet in the injectors was at boiler pressure, and the water was at atmospheric. By some fancy nozzle design the velocity is converted to pressure high enough to force water into the boiler. It does sound a bit like magic, but science usually does.

On the other hand it might be total BS, as advertising often is.

I suspect it's a bit of both.


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Willie, Tampa Bay
RevI

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Reply with quote  #14 
In the diagrams, you can see that the steam is in at 7 psiG and the water at 2 psiG, while the exhaust is at 36 psiG. That simply means it's not an ejector (if not a hoax).
stmbtwle

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Reply with quote  #15 
Call it what you will. I think the pressures claimed are inaccurate (if not a hoax).


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Willie, Tampa Bay
RevI

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Reply with quote  #16 
If the pressures are inaccurate, then it's certainly a hoax. At least I will consider this in this way.
RevI

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Reply with quote  #17 
I have just found the answer. It's called water hammer.
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