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[EnergyPlus_Support] Re: Solution to constant branch pumps, when bypass is not possible
I have uploaded the svg file in the User Exchange folder with the name demandbranchpumps.svg.
Regards,
Germán.
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Mário <mneves32@...> wrote:
>
> Hello Once Again,
>
> Sorry if try to be objective.
>
> In the past I have tried to simulate what you "apparently" are posting.
>
> This is my only interest in this issue.
>
> Anyway, instead of the idf why don´t you upload the SVG diagram?
>
> Best Regards
>
> MN
>
>
> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "ecoeficientees" <ecoeficiente@> wrote:
> >
> > Yes, Linda you are right, the best way is usually to look at the model. In my case I have a quite complex idf file but I have no problem to upload. In any case, the way to ask by the user was too short and direct for me...
> >
> > --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Linda Lawrie <linda@> wrote:
> > >
> > > Because it is always easier to look at someone's
> > > example than to try to recreate it from a brief description.
> > >
> > > Just because EnergyPlus does not complain -- does
> > > not mean that things will work correctly.
> > >
> > > At 09:52 AM 6/18/2012, ecoeficientees wrote:
> > > >What for? My message is not related to an specific idf file.
> > > >
> > > >--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Mário <mneves32@> wrote:
> > > > >
> > > > > Hello,
> > > > >
> > > > > Can YOu upload the idf?
> > > > >
> > > > > MN
> > > > >
> > > > > --- In EnergyPlus_Support@xxxxxxxxxxxxxxx,
> > > > "ecoeficientees" <ecoeficiente@> wrote:
> > > > > >
> > > > > > I am using a configuration for branch pumps when in the real HVAC system
> > > > > > they are constant flow pumps with bypass (through three-way valves).
> > > > > >
> > > > > > I use variable speed pumps, setting the curve performance coefficients
> > > > > > (1,0,0,0), so power consumption is constant although it can deliver
> > > > > > variable flow.
> > > > > >
> > > > > > I think it is a good solution to account for a constant pump with
> > > > > > bypass, since it provides variable flow but constant power. It is the
> > > > > > only way I have found to account for constant pumps as branch pumps,
> > > > > > since bypass is not possible.
> > > > > >
> > > > > > Do you see it right?
> > > > > >
> > > > > > It seems to work ok even with branch pumps in demand side, which should
> > > > > > not work according to E+ Reference but Energyplus is not complaining.
> > > > > >
> > > > > > That's my second doubt, are branch pumps in demand side correct? As I've
> > > > > > said, E+ seems to simulate them right, but Engineering Reference says
> > > > > > that pumps in demand side can only be used in the first branch. Why is
> > > > > > not Energyplus launching an error, then?
> > > > > >
> > > > > > Regards,
> > > > > >
> > > > > > Germán Campos.
> > > > > >
> > > > >
> > > >
> > > >
> > > >
> > > >
> > > >------------------------------------
> > > >
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> > > >
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> > > >
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> > > >
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> > > >
> > >
> >
>
------------------------------------
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