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Re: [EnergyPlus_Support] Re: Pump error
The errors state that the autosized flow rate for this pump is zero. Review
the sizing results in the eio output file and work back up the system to
determine what components on the chilled water side have been sized to zero
flow and this may help identify the problem.
Mike
On 2 Aug 2005, at 23:56, energypluser wrote:
> 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
> >
> >
> >
> >
> >
> >
> >
> > The primary EnergyPlus web site is found at:
> > http://www.energyplus.gov
> >
> > The group web site is:
> > http://groups.yahoo.com/group/EnergyPlus_Support/
> >
> > Attachments are not allowed -- please post any files to the
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> >
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> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > [Non-text portions of this message have been removed]
>
>
>
>
>
>
> The primary EnergyPlus web site is found at:
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