The 3 majors have a way of doing it. Autosprink does. If you tell the
program what is dry and what is wet, it will also show up in the
hydraulic report with the total volume of dry system piping. HydraCAD
has a routine for system volume. As Benjamin said, SprinkCAD does as
well. It is odd that anyone would size the compressor based off of
hydraulic demand and not system capacity.
On 4/4/2012 9:40 AM, Ben Young wrote:
Some design programs will give you the total system volume as a separate
figure independent of the hydraulic calcs as well. I know SprinkCAD does,
but I'm not sure about the others.
Benjamin Young
On Wed, Apr 4, 2012 at 8:41 AM, Morey, Mike<[email protected]> wrote:
B, "The air supply shall have a capacity capable of restoring normal air
pressure in the system within 30 minutes", I'd imagine you already know,
but the volume shown in the calcs isn't the amount of water (or air) in the
pipe, it's the amount flowed through the system in one minute with the
remote area flowing at the calculated density.
Mike Morey, SET, CFPS
Sprinkler Designer
BMW Constructors, Inc.
O: 317.651.0596 | C: 317.586.8111
www.bmwc.com
________________________________
From: [email protected] on behalf of
[email protected]
Sent: Wed 4/4/2012 8:39 AM
To: [email protected]
Subject: Today's Challenge question - Sizing Air compressors
Ok, so for today here it is:
When sizing a system air compressor for a dry or preaction system you size
it based on:
(a) the volume that is shown on the hydraulic calculation provides,
(b) a takeoff of the piping and determine volume of the entire system from
the end head back to the system valve.
Craig L. Prahl, CET
Fire Protection
CH2MHILL
Lockwood Greene
1500 International Drive
Spartanburg, SC 29304-0491
Direct - 864.599.4102
Fax - 864.599.8439
CH2MHILL Extension 74102
[email protected]
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