Re: [EnergyPlus_Support] Re: Solution to constant branch pumps, when bypass is not possible

[Linda Lawrie <linda@xxxxxxxxxxxxxx>]

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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