For those of you familiar with the HyrdraCalc program; does the Node Analysis section on the calculation report detail the demand that the sprinkler system requires?
Or does it list the current calculated condition of the various nodes of the sprinkler system? I recently received two reports from a consultant that used HydraCalc to show the current conditions with an existing fire pump, and the 2nd report shows the system with a proposed increased capacity fire pump. On both reports, the Node Analysis showed the same parameters for each of the nodes when compared to each other. As an example, Node 1 (existing pump report) Pressure at Node – 7, Discharge at Node 14.82. Node 1 (new increased capacity pump report) Pressure at Node – 7, Discharge at Node 14.82. It was explained by the consultant that the Node Analysis page details the demand that the sprinkler system requires which is why both reports show the same parameters. Not being familiar with this program, I wasn’t 100% sure if the explanation was correct. Thanks in advance. Sent in anonymously for discussion. Click Title to View | Submit Your Question | Subscribe
4 Comments
Brett
11/1/2024 06:21:00 am
Your consultant is correct. It shows the demand of the sprinkler system. Did they provide full calculation reports that show the increased safety factor due to the pump?
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Pete H
11/1/2024 06:42:09 am
Yeah, those discharge and pressure numbers are related to the demand calculation. So the sprinkler at node 1 only needs the same discharge regardless of the pump. It just has increased safety factor.
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Anthony
11/1/2024 08:32:18 am
A demand calc will remain constant up to the discharge flange of the pump. At that point the node analysis will show a change in pressure based on the different pressures supplied at this point. no flows should change throughout the calculation.
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Jesse
11/1/2024 08:37:09 am
That;s the demand to achieve the required density.
Reply
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