Re: [EnergyPlus_Support] CHW loop and ground heat exchanger

I can't think of anyway to loop that together. You need to charge a common hotwatermixed type object with two sources and draw with the heating loop. That means a tank or HX with 3 port pairs.

How about the Condenser Plant? Can you have 2 demand side loops in parrallel? Then one is connected to the chiller condenser side and the other charges a hotwater tank. The HWtank can use an auxilary heater to get the temp up to setpoint. Perhaps v8.1 has a tank with a waterheater coil instead of the electric heater. Perhaps you can post process the elec consumption and translate it into boiler gas consumption (assuming that is your normal heating source), or do something clever with EMS.

The last thing that comes to mind is checking out "custom componants" objects. But here I have very little knowledge.

Mit freundlichen GrÃ¼Ã?en- Sent from my iPhone (excuse the brevity)

i. A.

Jean Marais

b.i.g. bechtold

Tel. +49 30 6706662-23

On 02.12.2013, at 15:12, <fpasserini.tn@xxxxxxxxx> wrote:

Iâ??m modeling a chilled water loop whose water is chilled by a heat pump. Iâ??m modeling the heat pump with the object HeatPump:WaterToWater:EquationFit:Cooling

The heat pump transfers the heat to a vertical ground heat exchanger.
Consider the following schematic picture:

http://imageshack.us/f/842/zhoo.jpg/

Among the output variables Iâ??m not able to find the temperatures in the nodes A, B, C, and D. Is obtaining their values in the output possible?

Getting the design values is problematic. Of course, the temperature of the node E depends on the heat gains (weather data and activities in the building). From your experience, what are typical values for the nodes G and H?

I read at page 628 of the â??Input-Output Referenceâ?? that the model is relative to a â??reciprocating compressorâ??. The compressor that Iâ??m modeling is scroll. What is the best way to model it? Should I change the â??cooling capacity coefficientsâ?? and the â??cooling compressor power coefficientsâ??? Unfortunately I know only the rated (nominal) values of the characteristic parameters.

Regards

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