Customer Query
23 March 2007 10:59![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png){kind=small}
denCustomer: You build automated water tanker fill stations, right?
Me: Yep! We've built them for mines.
C: Good. We have Euclids with 200 tonne* tanks we use to spray the roads.
Me: That won't be a problem, we can build to suit.
C: But there's a power problem. The fill stations will have to use gravity to move the water.
Me: That's still not a problem. We've built gravity-fed systems before.
C: And the tankers have to fill in less than 5 minutes.
Me: ...
Me: ...
Me: ...
Me: (grabs calculator. 200,000/300=667 litres/second)
Me: Riiiight.
Over half a tonne of water per second. Fed by gravity. Time to talk to a hydraulic engineer.
*200,000 litres
Me: Yep! We've built them for mines.
C: Good. We have Euclids with 200 tonne* tanks we use to spray the roads.
Me: That won't be a problem, we can build to suit.
C: But there's a power problem. The fill stations will have to use gravity to move the water.
Me: That's still not a problem. We've built gravity-fed systems before.
C: And the tankers have to fill in less than 5 minutes.
Me: ...
Me: ...
Me: ...
Me: (grabs calculator. 200,000/300=667 litres/second)
Me: Riiiight.
Over half a tonne of water per second. Fed by gravity. Time to talk to a hydraulic engineer.
*200,000 litres
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Date: 23 Mar 2007 00:00 (UTC)no subject
Date: 23 Mar 2007 00:02 (UTC)no subject
Date: 23 Mar 2007 00:02 (UTC)no subject
Date: 23 Mar 2007 00:03 (UTC)The latest wave in hydraulic engineering!:D
(runs the other way quickly)
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Date: 23 Mar 2007 00:06 (UTC)no subject
Date: 23 Mar 2007 00:13 (UTC)no subject
Date: 23 Mar 2007 00:14 (UTC)Lizard Rat out.
Water-Flavored Wolf in Albany NY
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Date: 23 Mar 2007 00:30 (UTC)no subject
Date: 23 Mar 2007 00:51 (UTC)STOPPING the water when all is done might pose another problem, I admit.
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Date: 23 Mar 2007 01:29 (UTC)no subject
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Date: 23 Mar 2007 01:47 (UTC)no subject
Date: 23 Mar 2007 01:51 (UTC)no subject
Date: 23 Mar 2007 02:17 (UTC)Sorry, lost my mad-science groove there for a second.
(Seriously, though, tell these guys that they'd spend less money buying extra trucks than trying to fill them that fast. :) )
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Date: 23 Mar 2007 02:39 (UTC)no subject
Date: 23 Mar 2007 02:41 (UTC)no subject
Date: 23 Mar 2007 02:53 (UTC)no subject
Date: 23 Mar 2007 03:26 (UTC)no subject
Date: 23 Mar 2007 03:31 (UTC)Plus, they want 9 fill stations. And they will pay us to build them. I don't want to tell them to spend less. 8)
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Date: 23 Mar 2007 04:45 (UTC)To start, a blog about it (http://gizmodo.com/gadgets/fire-extinguisher/jetpowered-fire-extinguisher-douses-fires-in-seconds-215604.php)...
And the blocked YouTube clip (http://www.youtube.com/watch?v=uyGDxglTVgA&eurl=http%3A%2F%2Fgizmodo%2Ecom%2Fgadgets%2Ffire%2Dextinguisher%2Fjetpowered%2Dfire%2Dextinguisher%2Ddouses%2Dfires%2Din%2Dseconds%2D215604%2Ephp).
Have the best
-=TK
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Date: 23 Mar 2007 05:49 (UTC)no subject
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Date: 23 Mar 2007 08:30 (UTC)Steve
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Date: 23 Mar 2007 08:56 (UTC)hey, wait a second... these are open top trucks with a sprinkler system, basically modified dump trucks?
Why not just have an overhead tank that fills inbetween uses, and dumps the water into the truck in one large-ish chunk using a 'trap door' and chute arrangement? Kinda like they use at water parks for creating waves.
Of course, I know nothing much about hydraulic engineering... so I could just be talking nonsense.
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Date: 23 Mar 2007 11:32 (UTC)We've built similar systems, but smaller in scale: only 80 tonnes in 5 minutes.
(That tower is 7m hight, and the pipe is 300mm welded steel.)
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Date: 23 Mar 2007 11:33 (UTC)no subject
Date: 23 Mar 2007 18:12 (UTC)Another tactic would be to fill the tank in about four minutes and allow time to turn the valve on and off. You do need a good read on the tank being filled to ramp it though.
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Date: 23 Mar 2007 19:22 (UTC)You have a very interesting job, to say the least. You always make it sound like so much fun. ^_^
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Date: 23 Mar 2007 21:58 (UTC)no subject
Date: 23 Mar 2007 23:08 (UTC)Just be sure to charge 4x
Query
Date: 24 Mar 2007 12:29 (UTC)200 000 liter = 200 cubic meters
Square Tube 2x2m:
2x2M =4 square meter
200/4 = 50m
Pipe 2m diameter
Pi R Sqared = 3.1415 x 1 x 1 = Pi Square meters
200/pi = 63.7m
So what about a tower of
square tube 2m by 2m, 50m tall or
2m Pipe 64m tall
with a dump valve at the bottom.
Increasing the tower diameter will decrease the height of the tower, and lower the pressure at the valve. You could call it the Niagra Flush.
Re: Query
Date: 24 Mar 2007 12:36 (UTC)Re: Query
Date: 25 Mar 2007 02:12 (UTC)Tanks up high, some sort of a slot trench at the bottom of the tank to prevent/break up any coriolis (swirling) action. BIG butterfly valve at the tank with a slow motorized actuator - if it takes 10 seconds or more for the valve to cycle, no water hammer. Big vacuum breaker right after the valve, unless you want collapsed pipes. And no tower riser at the truck station, put up some truss and go horizontal (aquaduct)when you approach the bottom of the hill - let the pipe drain.
Might even make a honeycomb laminar flow 'rectifier' at the drop outlet - get a clean laminar flow going into the truck instead of messing with a chunk of hose to restrict splashing. Take a Kohler faucet apart for inspiration.
--<< Bruce >>--
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Date: 26 Mar 2007 08:11 (UTC)Just multiply the number of tanks/pipes, is all, I'd suggest, *grins*