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RE: [EnergyPlus_Support] Pump error
Hi Charlie,
When you say you set up a pump between supply mixer and splitter, did you mean that the pump was in one of the parallel branches between splitter and mixer. Currently E+ cannot model such systems and the pump always has to be the first component of the first branch of the supply side (Demand Side cannot have a pump). Now are you sure that the errors that you mentioned were the only errors that came out and did not tell any thing about placement of pump?
Sankar
S.K.Padhmanabhan
Research Associate
Mechanical & Aerospace Engineering
Oklahoma State University,
Stillwater, OK - 74075
Ph: (405)744-1038
-----Original Message-----
From: EnergyPlus_Support@xxxxxxxxxxxxxxx on behalf of energypluser
Sent: Mon 8/1/2005 10:24 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] Pump error
Dear all
I set up a circling pump between a supply water mixer and splitter.
I
run a sizing simulation. Then the warning shows up as follow:
** Warning ** Check input. Calculated Pump Efficiency=0.00E+000%
which
is less than 50%, for pump=CW CIRC PUMP
** ~~~ ** Calculated Pump_Efficiency % =Total_Efficiency %
[0.0E+000] / Motor_Efficiency % [90.0]
** ~~~ ** Total_Efficiency % =(Rated_Volume_Flow_Rate
[0.0E+000]
* Rated_Pump_Head [179352.0] / Rated_Power_Use [300000.0]) * 100.
** Warning ** Check input. Pump nominal volumetric flow rate is
set
or calculated = 0, for pump=CW CIRC PUMP
How can I fix it ?
Thank you in advance
charlie
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