[Bldg-sim] Modeling Centralized Water-to-Water HP's and Hybrid HP's

Aaron Smith asmith at mreng.ca
Mon Aug 8 15:02:34 PDT 2011


Ahmed,

 

The best recommendation that I can think of is to model this as a
"Combination Ground Source Heat Pump" Plant with a "4 pipe fan coil" System.
You will have to add the distributed heat pump cooling capacities to the
central heat pump cooling capacity and create a representative COP.  As you
can't model a boiler plant for the System heating, I'd recommend modeling
the heating as a Natural Gas or Oil Furnace.  System Cooling can be input as
Hydronic so chilled water will come from the central Water-to-water heat
pump plant.  NRCan may be willing to provide input as well even with the
ecoENERGY program ending this past spring.

 

As you know EE4 is not the most flexible simulation program, eQUEST might do
a better job if you are familiar with that software.


Regards,

Aaron  

 

Aaron Smith, P.Eng 

LEEDR AP BD+C, M-ASHRAE, Mechanical Engineer



t: (902) 422-7393

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From: Mehta, Gaurav [mailto:Gaurav.Mehta at stantec.com] 
Sent: Thursday, August 04, 2011 7:06 PM
To: bldg-sim at lists.onebuilding.org
Subject: Re: [Bldg-sim] Modeling Centralized Water-to-Water HP's and Hybrid
HP's

 

Ahmed,

 

Have you referenced the EE4
<http://canmetenergy-canmetenergie.nrcan-rncan.gc.ca/fichier/79060/EE4-Engli
sh-2008-02-01.pdf>  Modeling Guide ?

 

In case you have not. You might find it useful when using EE4. It has a
number of workarounds with examples.

 

 

Thanks.

 

Best regards,

 

Gaurav

 

 

Gaurav Mehta, LEEDR AP BD+C
Sustainable Building Analyst
Stantec

1932 First Avenue Suite 307
Seattle WA 98101
Ph: (206) 770-7779
Fx: (206) 770-5941
Gaurav.Mehta at stantec.com

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From: bldg-sim-bounces at lists.onebuilding.org
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Ahmed Azhari
Sent: Thursday, August 04, 2011 2:12 PM
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] Modeling Centralized Water-to-Water HP's and Hybrid HP's

 

Hi, 

 

I am using a Canadian-based energy modeling software called EE4 which uses
DOE calculation engine. I am trying to model a centralized water-to-water
Heat Pumps System that provides hot water to distributed hybrid heat pumps
(hybrid heat pump is fan coil in heating mode and heat pump in cooling
mode). The hybrid heat pumps uses ground to reject heat when in cooling
mode. The centralized water-to-water heat pumps provide chilled water for
the make-up air units cooling coils. The Make-up air units heating coils are
fed directly from the boiler. EE4 would not allow me to use a combination of
these two systems. Does anyone have a work-around to this type of system. 

 

I would really appreciate any input in this regards. 

 

Thanks,

Ahmed 

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