[EnergyPlus_Support] Re: Pump error

["energypluser" <energypluser@xxxxxxxxxxxx>]

Hi Sankar

My pump is in the inlet branch of my supply splitter.It is not in 
one of the paralle branches between splitter and mixer. And the 
warning message about the pump is what I have posted in my previous 
question.
Could you please tell me how to fix this problem?
Thank you in advance

charlie

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Padhmanabhan, Sankar" 
<sankar.padhmanabhan@o...> wrote:
> 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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