Re: [PipingDesign] Re: Agitator Design Software - Yes I Know its Off Topic

From: <Geoff>
Date: Mon Aug 12 2002 - 18:46:00 EDT

Steve,

The ITT Flygt website has an online mixer selection for submersible mixers. These are used in biological reactor in sewage applications.

Geoff Stone
--- smckennz <Mechproj@xtra.co.nz> wrote:

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Well Bugger<BR>
I missed this demo. In any case the monstosity I designed did the job <BR> at 200W/m^3 (1.5kW (wow), 83rpm , 4 straight blades, tip speed about <BR> 3m/s) to suspend reasonably light solids in a rectangular tank (2m X <BR> 2.2m X 0,7m, no baffles). Unfortunately available gearbox ratios have <BR> forced me to use a slower speed and longer blade than I would have <BR> liked. It will be better as installed until it bogs out. Then I think <BR> a restart may involve a bit of manual clearing of the blades; a <BR> smaller faster impeller would blast itself out of trouble on a <BR> restart.<BR>
Whew! Another one done without extensive study,testing,modelling or <BR> the client knowing what he really needs. <BR> A database of crap engineering outlines, together with results, could <BR> be really handy for jobs which do not warrant the extensive <BR> testing/data required to &quot;Do it Properly&quot;<BR> <BR>
Irresponsibly yours<BR>
<BR>
Steve McKenzie<BR>

<BR>
<BR>
<BR>
<BR>
<BR>
<BR>

  <BR>
--- In PipingDesign@y..., &quot;Bruce Bullough&quot; &lt;bbullough@s...&gt; wrote:<BR>
&gt; In my experience an agitator is never simple unless you've done the <BR>
same system before and successfully.&nbsp; Ocassionally I get paid fairly <BR> well for doing a mixing study or model.&nbsp; Clients almost never know <BR> enough about what they need or about their system to do more than a <BR> brute force, best guess for design.&nbsp; Any decent computer model <BR> requires a fair amount of input to get anything of value out.<BR>
&gt; <BR>
&gt; <BR>
&gt; This demo (see your URL) should be able to give you about the same <BR>
info you'd get by running thru the basic calcs manually.&nbsp; But <BR> being &quot;free&quot; it's not as easy to load properly as one would like.<BR>
&gt; <BR>
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... Bruce D. Bullough ...<BR>
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Sebesta Blomberg &amp; <BR>
Associates<BR>
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2381 Rosegate<BR>
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Roseville, MN&nbsp; 55113<BR>
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651-634-7344 (office)<BR>
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www.sebesta.com<BR>
&gt; <BR>
&gt; -----Original Message-----<BR>
&gt; From: smckennz [mailto:Mechproj@x...]<BR>
&gt; Sent: Thursday, August 01, 2002 5:16 AM<BR>
&gt; To: PipingDesign@y...<BR>
&gt; Subject: [PipingDesign] Agitator Design Software - Yes I Know its <BR>
Off<BR>
&gt; Topic<BR>
&gt; <BR>
&gt; <BR>
&gt; <BR>
&gt; Me again<BR>
&gt; <BR>
&gt; well its not piping but it is piping related.<BR>
&gt; Every time I think I have finished with them, someone wants a <BR>
bloody <BR>
&gt; agitator designed.<BR>
&gt; I need some sizing software to estimate powers, speeds, dimensions <BR>
as <BR>
&gt; the books I use take too long for something which should take an <BR>
hour <BR>
&gt; at most. The mechanical design takes a little longer.<BR>
&gt; Has anyone found a piece of software to do this? I am talking basic <BR>
&gt; agitators; turbines, paddles, anchors not those marvels made by <BR>
&gt; Lightnin and co.<BR>
&gt; I think Google may have found something at:<BR>
&gt; <BR>
&gt; <a

href="http://custom.lab.unb.br/pub/asme/FLUID/">http://custom.lab.unb.br/pub/asm\ e/FLUID/</a><BR>
&gt; <BR>
&gt; It is called mixing11 but I cannot get it to run. could someone who <BR>
&gt; is computer literate have a look and tell me who to pay to get it <BR>
to <BR>
&gt; go? I run Windows 2000, whatever that means.<BR>
&gt; <BR>
&gt; There appears to be a bit of interesting freeware at that site, so <BR>
&gt; you may want to have a look even if you dont care for agitators <BR>
&gt; because there appears to be some good fluid stuff there, if <BR>
filenames <BR>
&gt; are anything to go by.<BR>
&gt; <BR>
&gt; Thanks in anticipation<BR>
&gt; <BR>
&gt; Steve McKenzie<BR>
&gt; <BR>
&gt; <BR>
&gt; <BR>
&gt; <BR>
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