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RE: [EnergyPlus_Support] Pumps working in parallel?
Hi Clarice,
You can model branch pumps in V1.2.3. This requires the pump in the branch to be the first component in the branch. This also requires that there be an active component downstream of the pump in any branch. So for your case, you might have to play around the scheduling and operation schemes in plant loop for purchased so that you can model one big purchased equipment as 3 different purchased in three different branches. We are hoping on implementing the pump bank feature in next version which should be more appropriate for your case(?). Right now you have to tweak with the operation schemes and branch pumps.
We are looking forward to hear how the branch pump is performing.
Sankar
S.K.Padhmanabhan
Research Associate
Mechanical & Aerospace Engineering
Oklahoma State University,
Stillwater, OK - 74075
Ph: (405)744-4380
________________________________
From: EnergyPlus_Support@xxxxxxxxxxxxxxx on behalf of Clarice Bleil de Souza
Sent: Wed 11/23/2005 7:16 AM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] Pumps working in parallel?
Hi everybody,
I need to simulate a system with 3 pumps working in parallel and one of them in standby, but my chiller is in fact a purchased chiller. To do so I imagine I need to set an supply inlet branch with a pipe only as a component and connect it to a splitter. From this splitter to the mixer I have 3 branches with the 3 pumps in parallel + 1 with a pump in standby. From the mixer to the supply outlet node I have the purchased chiller. I know I can only have one pair of splitter/mixer per subloop so I suppose I need to use them to put the pumps in parallel. However, I cannot set a bypass branch for my purchased chiller because of that, so I'm not sure if this is going to work.
Another possibility would be to transform the 3 pumps into an equivalent pump, ignore the standby one and build up a normal supply plant loop. But of course this would not allow me the same flexibilities to work with pumps specifications.
Can anybody give me a hand on that please? I assume somebody has already faced this kind of trouble in the past.
I thank you very much for your help
Best regards,
Clarice
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