[Bldg-sim] Hybrid GSHP system

[Xiaobing Liu]

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.pdf)
 
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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