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[EnergyPlus_Support] Re: Sea Water Air Conditioning System
I have the same kind of problems; it would be nice to get District
Cooling in condenser loop. In some cases there are plenty of natural
resources, like water courses, to put in condenser loops. The actual
modelling alternatives in E+ are rather insufficient for anual energy
evaluation.
JB
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Elreq" <tolteca33@...>
wrote:
>
> Is it possible to get the modified version to allow district cooling
> in a condenser loop? This would really help us. The other options
that
> you suggest are not really approximating to what we want to model.
So,
> it would be great to have the possibility to include DC into the
> condenser loop. Please let me know.
>
> Regards,
> Santiago
>
> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Griffith, Brent"
> <brent.griffith@> wrote:
> >
> > I believe that Peter originally did this as a special research
project
> > where he temporarily modified the program to allow district
cooling on a
> > condenser loop.
> >
> >
> >
> > If the water is cold enough for direct cooling, you could use one
plant
> > loop with district cooling run straight into the coils. If you
want to
> > model it as condenser side of a water-to-water chiller, then the
pond
> > heat exchange is one option.
> >
> >
> >
> > Another approach would be to ignore the details and conditions of
the
> > condenser loop and use a Chiller:ConstantCOP with a well-chosen
COP.
> >
> >
> >
> >
> >
> >
> >
> > ________________________________
> >
> > From: EnergyPlus_Support@xxxxxxxxxxxxxxx
> > [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Elreq
> > Sent: Friday, February 13, 2009 6:54 AM
> > To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> > Subject: [EnergyPlus_Support] Re: Sea Water Air Conditioning
System
> >
> >
> >
> > Dear Peter,
> >
> > I have followed your suggestion but I found out that the object
> > Purchased Cooling is not allowed to be in the Condenser Equipment
> > list. How did you manage to include it?
> >
> > Regards,
> > Santiago
> > >
> > >
> > >
> > > Hi Santiago,
> > >
> > >
> > >
> > > I've done this before in the following way: In the condenser
loop
> > where
> > > you would usually put your cooling tower (under the
> > > CondenserEquipmentList object), substitute in a DistrictCooling
object
> > > (formerly known as PURCHASED:CHILLED WATER in earlier versions
of E+).
> > > Then put a SetpointManager:Scheduled object on the condenser
loop.
> > > Point it to control the outlet node of the supply-side
condenser loop.
> > > Finally setup the schedule on the SetpointManager to match the
> > > temperature of the sea water-I had monthly average values.
> > >
> > >
> > >
> > > To bypass the chiller completely for waterside economizing,
you'll
> > need
> > > to use a HeatExchanger:Hydronic object (formerly HEAT
> > > EXCHANGER:HYDRONIC:FREE COOLING ) or one of the other
> > HeatExchanger:XYZ
> > > objects to connect the plant loop to the condenser loop.
> > >
> > >
> > >
> > > Check out the example files included with E+ for illustrations
of how
> > to
> > > setup a condenser loop, setpoint manager, and heat exchangers.
> > >
> > >
> > >
> > > If the sea water temperatures ever go below 5 C you'll also
need to
> > hack
> > > the Energy+.idd file to change the CondenserLoop definition so
that
> > > Minimum Loop Temperature is allowed to go colder.
> > >
> > >
> > >
> > > Good luck,
> > >
> > > P
> > >
> > >
> > >
> > > ________________________________
> > >
> > > From: EnergyPlus_Support@xxxxxxxxxxxxxxx
> > <mailto:EnergyPlus_Support%40yahoogroups.com>
> > > [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx
> > <mailto:EnergyPlus_Support%40yahoogroups.com> ] On Behalf Of Elreq
> > > Sent: Monday, December 01, 2008 8:42 AM
> > > To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> > <mailto:EnergyPlus_Support%40yahoogroups.com>
> > > Subject: [EnergyPlus_Support] Sea Water Air Conditioning System
> > >
> > >
> > >
> > > Dear Forum,
> > >
> > > I was wondering if anyone has tried to use E+ to simulate a Sea
Water
> > > Air conditioning system. I think that the Ground Heat
Exchanger: Pond
> > > could be used as an approximation.
> > >
> > > Any suggestions or ideas?
> > >
> > > Thanks
> > >
> > > Santiago
> > >
> >
>
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