RE: RE: Re: [EnergyPlus_Support] Re: Modelling Ductless Mini Split Heat Pumps

I am not sure how you attempted to “erase cooling data”, but if you assign zero capacity to the cooling coil there will be no cooling. You might also raise the cooling setpoint to something very high, like 50C.

James V Dirkes II, PE, BEMP, LEED AP
www.buildingperformanceteam.com
Energy Analysis, Commissioning & Training Services
1631 Acacia Drive, Grand Rapids, MI 49504 USA
616 450 8653

From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of ecedemir3@xxxxxxxxx
Sent: Tuesday, October 29, 2013 8:42 AM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: RE: RE: Re: [EnergyPlus_Support] Re: Modelling Ductless Mini Split Heat Pumps

Dear James,

I simulated the model by using this HVAC templateZone:PTHP. Yes it works as i want but i need have it only as heating unit. I tried to erase cooling data but the output always give electicity for cooling. What shoul i do to run the model only for heating?

Ece

---In EnergyPlus_Support@xxxxxxxxxxxxxxx, <energyplus_support@xxxxxxxxxxxxxxx> wrote:

Ece Demir,

HVACTemplate:Zone:PTHP should work very well. One system will be needed for each zone. If you want to build your own system instead of using a template, use ZoneHVAC:PackagedTerminalHeatPump

James V Dirkes II, PE, BEMP, LEED AP
www.buildingperformanceteam.com
Energy Analysis, Commissioning & Training Services
1631 Acacia Drive, Grand Rapids, MI 49504 USA
616 450 8653

From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of ecedemir3@...
Sent: Tuesday, October 22, 2013 5:29 AM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: RE: Re: [EnergyPlus_Support] Re: Modelling Ductless Mini Split Heat Pumps

Hello everybody,

i have a model with thirteen zone, and each zone has its own ductless split system only for heating. This VRF system (where there is

one outdoor condensing unit and multiple indoor units) is not suitable for my model. Also every zone has different number of hours per day to use the heating unit (I have the schedule for time periods).

So i would like to model a ductless split system air conditioner for each zone. I have used ``Unitheater`` with electricity example file but the electricity for heating was exteremely low.

Could you please help me about this subject?

Ece Demir

---In EnergyPlus_Support@xxxxxxxxxxxxxxx, <energyplus_support@xxxxxxxxxxxxxxx> wrote:

Mr. Richard,

Yes, thank you.

I read your report on the VRF system modeling. It has been of great help.

Regards,

Nikhil

From: Richard Raustad <RRaustad@...>
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Sent: Friday, 18 May 2012 10:28 AM
Subject: Re: [EnergyPlus_Support] Re: Modelling Ductless Mini Split Heat Pumps

This has already been answered?

Use the VRF system! (e.g., ZoneHVAC:TerminalUnit:VariableRefrigerantFlow, etc.)

On 5/18/2012 10:19 AM, Nikhil Sehgal wrote:

Hello,

Can anyone help me with the query from trailing mail. I want to model Duct-less mini split heat pumps. (Preferable with a variable speed compressor). Is there any reasonable approximate way of doing this is in EP?

Thanks,
Nikhil Sehgal
---
Building Energy Efficiency Group
Fraunhofer Center for Sustainable Energy
Cambridge, USA

From: Nikhil Sehgal <nickus_1986@...>
To: "EnergyPlus_Support@xxxxxxxxxxxxxxx" <EnergyPlus_Support@xxxxxxxxxxxxxxx>
Sent: Wednesday, 16 May 2012 8:29 PM
Subject: Modelling Ductless Mini Split Heat Pumps

Hello,

Is there a way to model duct less mini split heat pumps in EnergyPLus? The refrigeration case does not connect to any fan coil type unit and there is no other option where compressor and condenser can be placed separately. Is there any way around this?

Thanks,
Nikhil Sehgal

---
Building Energy Efficiency Group
Fraunhofer Center for Sustainable Energy
Cambridge, USA
-- 
Richard A. Raustad
Senior Research Engineer
Florida Solar Energy Center
University of Central Florida
1679 Clearlake Road
Cocoa, FL  32922-5703
Phone:   (321) 638-1454
Fax:     (321) 638-1439 or 1010
Visit our web site at: http://www.fsec.ucf.edu
  
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