[Bldg-sim] Hybrid GSHP system

[Scott Hackel]

All: 

As Xiaobing mentioned, ASHRAE recently funded a research project (RP-1384)
to simulate hybrid GSHP systems
The main goal of the project is to establish
general design guidelines for sizing/controlling these systems (targeted at
designers).  The project has been completed; reports and publications should
be released in the near future.  But the model (built using the
well-validated TRNSYS ground loop model) will also be released in a
distributable format that can be used by anyone, for design, system
optimization, research, etc.  The official version of this distributable
program would be available sometime after the report.

 

Scott Hackel

Graduate Research Assistant, Solar Energy Lab

University of Wisconsin - Madison

sphackel at uwalumni.com

 

  _____  

From: bldg-sim-bounces at lists.onebuilding.org
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Xiaobing Liu
Sent: Wednesday, February 27, 2008 7:51 AM
To: Sever, Franc; bldg-sim at lists.onebuilding.org
Subject: Re: [Bldg-sim] Hybrid GSHP system

 

Franc:

 

As I know, the current version of eQUEST cannot simulate hybrid GSHP system
that has both boiler and cooling tower coupled with GHX. Although a hybrid
GSHP system with cooling tower only can be set up and run with eQUEST, but
the modeling algorithm for this kind of HGSHP is not flexible enough to
simulate a real HGSHP. The challenging task is to determine how to
distribute the loads and flow rate to GHX and the cooling tower. 

 

There are some new developments in modeling hybrid GSHP with other programs.
You may want to check for additional information.

 

Development of Design Guidelines for Hybrid Ground Source Heat Pump Systems,
1384-RP, Greg Nellis, Sandy Klein and Jeff Thornton, University of
Wisconsin, Madison, Wisconsin

 

Gentry, J.E., J.D. Spitler, D.E. Fisher, X. Xu.  2006. Simulation
<http://www.hvac.okstate.edu/research/Documents/Gentry_Spitler_Fisher_Xu_06.
pdf>  of Hybrid Ground Source Heat Pump Systems and Experimental Validation.
Proceedings of The7th International Conference on System Simulation in
Buildings, Liège, Belgium. December 11-13, 2006 (paper is available at
http://www.hvac.okstate.edu/research/Documents/Gentry_Spitler_Fisher_Xu_06.p
df)

 

Regards,

 

Xiaobing

-----Original Message-----
From: bldg-sim-bounces at lists.onebuilding.org
[mailto:bldg-sim-bounces at lists.onebuilding.org]On Behalf Of Sever, Franc
Sent: Tuesday, February 26, 2008 3:43 PM
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] Hybrid GSHP system

Hello All, 

I am trying to model a hybrid ground source heat pump system (boiler and
fluid cooler).  Does anyone know how to do this using eQuest??  I have
created the GLHX and attached a fluid cooler and a boiler, however eQuest
will not run the simulation with the boiler attached to the loop.  If anyone
has experience with this type of simulation I would any help that you can
offer.  Thanks

Franc J. Sever 
Engineer, Mechanical 

karpinski 
ENGINEERING 
3135 Euclid Avenue 
Cleveland, OH  44115 
P  216-391-3700 
F  216-391-0108 
E  FSever at karpinskieng.com 

 

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