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[EnergyPlus_Support] Re: Sea Water Air Conditioning System
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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