[EnergyPlus_Support] Re: Error -- Mass Flow Rate Calculation ........

["ingdallolio" <ing.dallolio@xxxxxxxxx>]

Thankyou very much Sankar.
It looks like I still have the problem with the water heater, at the 
end of one year simulation adding all the "WATER HEATER:Water Heater 
Use Energy [J](Hourly)" it is way above the "WATER HEATER:Water 
Heater Source Energy [J](Hourly)" the energy do not balance ! I had 
the same problem with the previous E+ version, 13.., Peter Ellis 
wrote that was a bug and that had been fixed into E+ 14 ?
Any idea for me ?
Once more, thank you Sankar and the E+ team for your work.
Ciao.
Andrea. 

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Sankar 
<sankar.padhmanabhan@...> wrote:
>
> Andrea,
> Firstly I noticed that the way you set up the loop is not exactly 
the 
> same as the Solar flat plate collector. Since you are using a 
> Tempering valve in the Radiant loop to control the tank 
temperature, 
> the water heater should be specified "PASSIVE". That would get rid 
of 
> all the "Outlet and inlet differ by more than tolerance" error.
> However, even with that change you will end up with another mass 
flow 
> warning (out of bounds), which is not going to affect the results 
> significantly. The warnings, I think, are due to a minor update 
> problem (of Max Avail, read engineering Doc for more info on Mass 
> flow max avail) which manifested in your input file. I have asked 
the 
> person who developed the valve model for more details and if a bug 
> really exists a CR would be posted to take care of that.
> 
> Thanks
> Sankar
> 
> At 07:53 PM 10/14/2006, Sankar wrote:
> 
> >Andrea,
> >Could you upload the file to the yahoo groups folder or send it 
to me
> >at <mailto:sankar.padhmanabhan%
40okstate.edu>sankar.padhmanabhan@...
> >
> >Thanks
> >Sankar
> >
> >At 06:02 PM 10/14/2006, you wrote:
> >
> > >Hi, I'm using the new E+ 1.4 now and I set all water loops flow 
rates
> > >to autosize, still I get :
> > >
> > >Warning ** Error -- Mass Flow Rate Calculation in Plant 
Loop=SECOND
> > >LOOP, Outlet and Inlet differ by more than tolerance.
> > >** ~~~ ** Occurrence info=TRIESTE, 01/21 00:00 - 01:00
> > >** ~~~ ** Loop inlet node=SECOND LOOP PUMP INLET,
> > >flowrate=0.2087 m/s
> > >** ~~~ ** Loop outlet node=OUTLET SECOND BOILER,
> > >flowrate=0.4173 m/s
> > >
> > >My idf is very similar to the SolarCollectorFlatPlateWater 
example
> > >file, but instead of heating domestic water my system feed a 
radiant
> > >floor. I have the problem on the radiant floor loop.
> > >
> > >Any idea ?
> > >Thanks.
> > >Andrea.
> > >
> > >--- In
> > ><mailto:EnergyPlus_Support%
40yahoogroups.com><mailto:EnergyPlus_Sup 
> > port%40yahoogroups.com>EnergyPlus_Support@xxxxxxxxxxxxxxx,
> > >"ingdallolio"
> > ><ing.dallolio@> wrote:
> > > >
> > > > Hello,
> > > >
> > > > I Uploaded the file tempering valve_60m2,
> > > > before I added the tempering valve this file did only give 
few
> > >warnig
> > > > (clear origin) , now I get 174 times :
> > > > Error -- Mass Flow Rate Calculation in Plant Loop=SECOND 
LOOP,
> > >Outlet
> > > > and Inlet differ by more than tolerance.
> > > > Any idea about this ?
> > > > Thanks for reading this.
> > > > Andrea
> > > >
> > >
> > >
> >
> >[Non-text portions of this message have been removed]
> >
> >
> 
> 
> [Non-text portions of this message have been removed]
>





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