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RE: [EnergyPlus_Support] Vertical Ground Heat Exchanger g-functions
- To: "EnergyPlus_Support@xxxxxxxxxxxxxxx" <EnergyPlus_Support@xxxxxxxxxxxxxxx>
- Subject: RE: [EnergyPlus_Support] Vertical Ground Heat Exchanger g-functions
- From: Danko Davidovic <ddavidovic@xxxxxxx>
- Date: Thu, 29 Apr 2010 13:31:25 -0400
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- Thread-topic: [EnergyPlus_Support] Vertical Ground Heat Exchanger g-functions
I studied vertical ground heat exchangers while ago, and if I remember correctly Eskilson?s model had some limitations in terms of time scale allowed to be modeled. I think EnergyPlus calculates the loads and temperature responses on hourly/sub-hourly basis and you should include the range of g-functions to cover both short and long periods for your particular borehole configuration to feed EPlus with proper values.
Here is the link to Yavuzturk paper, and you will probably find more information there:
<http://www.hvac.okstate.edu/research/Documents/ASHRAE/Yavuzturk_Spitler_99.pdf>http://www.hvac.okstate.edu/research/Documents/ASHRAE/Yavuzturk_Spitler_99.pdf
Hope I helped you a bit.
Danko Davidovic
From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Peter Henniger
Sent: Thursday, April 29, 2010 12:34 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] Vertical Ground Heat Exchanger g-functions
Dear EnergyPlus Team
For the object GroundHeatExchanger:Vertical, the .idf file requires pairs of g-function values as definitions (see .idd definition below).