RE: [EnergyPlus_Support] Re: Sea Water Air Conditioning System

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@yahoogroups.com
> [mailto:EnergyPlus_Support@yahoogroups.com] On Behalf Of Elreq
> Sent: Monday, December 01, 2008 8:42 AM
> To: EnergyPlus_Support@yahoogroups.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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