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Re: [EnergyPlus_Support] Re: Earth tube not working



Hello Jermiah,
 
There is an example file availabe. EarthTubeSimpleTest.idf
 
also, have a look at this file
http://civil.colorado.edu/classes/cven5080/EP-Lab-05-12.pdf
 
 
Cheers,
 
Dolf


On Sat, Jul 13, 2013 at 8:44 AM, Jeremiah Crossett <jcrossett@xxxxxxxxxxxxxxx> wrote:
 

Dear list, 

I still am not finding any reason this earth tube is not working> Am I suppose to connect it to the HVAC system using nodes?  The documentation does not specify so it seems unlikely..  Attached is the file, any help would be very appreciated.  Interestingly, the outputs for earth tube reporting do not cause a warning, so apparently the model is doing something, just not anything useful...

Thanks for any help on this one and kind regards. 


Jeremiah D. Crossett  | Senior Analyst  |  Phase Change Energy Solutions
120 E. Pritchard St.  | Asheboro, NC 27203  | Mobile 503-688-8951
  





On Fri, Jul 12, 2013 at 7:52 PM, Jeremiah Crossett <jcrossett@xxxxxxxxxxxxxxx> wrote:
Hello, 
My model with earth tube cooling is not showing any results from earth tube output variables.  The inputs I am using seem reasonable and I have read the reference Is this object suppose to connect to the HVAC with nodes? I can send the IDF if anyone is willing to take a look and have pasted the object below. 

Zone Name 1TopFloor:Zone1
Schedule Name 2
Design Flow Rate 1.83002825566061E-02
Minimum Zone Temperature when Cooling 22
Maximum Zone Temperature when Heating 21
Delta Temperature 1
Earthtube Type INTAKE
Fan Pressure Rise 350.0
Fan Total Efficiency 1
Pipe Radius 0.304800000001219
Pipe Thickness 0.02
Pipe Length 30.4800000001219
Pipe Thermal Conductivity 200.0
Pipe Depth Under Ground Surface 3.5
Soil Condition HeavyAndDamp
Average Soil Surface Temperature 9.760938644409
Amplitude of Soil Surface Temperature 14.012404441833
Phase Constant of Soil Surface Temperature 19
Constant Term Flow Coefficient 1
Temperature Term Flow Coefficient 0
Velocity Term Flow Coefficient 0
Velocity Squared Term Flow Coefficient 0



Jeremiah D. Crossett  | Senior Analyst  |  Phase Change Energy Solutions
120 E. Pritchard St.  | Asheboro, NC 27203  | Mobile 503-688-8951
  







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