[TRNSYS-users] Questions on the Vertical U-Tube Ground Heat Exchanger

[Francois Badinier]

Hi Lei

 

This is a good question. But I think these parameters refer the radius as
explained in the proforma, because if you see in the code, they are called
R0=PAR(5), Rpo=PAR(12), Rpi=PAR(13) which stand logically for Radius... So I
just think that there is an error in the DSTWizard.

 

Otherwise, it is not possible to model a double U tube heat exchanger with
this Type557. I can refer you to a component coded by TRANSSOLAR which can
do that, it is called Type451. You can find the documentation and order it
on
http://www.transsolar.com/__software/docs/komponenten/komponenten_ts_en.htm

 

Regards,

 

François Badinier

Development Engineer

ICAX Ltd

1 Hatfield House 

Baltic Street West

London EC1Y OST

 <mailto:alan.kiff at icax.co.uk> francois.badinier at icax.co.uk

 <http://www.icax.co.uk> www.icax.co.uk

 

 

 

-----Original Message-----
From: Lei Wang [mailto:leiwang at tees.tamus.edu] 
Sent: 17 April 2009 19:47
To: trnsys-users at cae.wisc.edu
Subject: [TRNSYS-users] Questions on the Vertical U-Tube Ground Heat
Exchanger

 

Hi, all 

 

I have questions on the vertical U-tube ground heat exchanger.  

 

In the parameter table, Parameters of 5(Borehole radius), 12(Outer radius of
u-tube pipe), 13 (inner radius of u-tube pipe). I think these parameters
should be the radius of the Borehole and tube pipe. But in the Plugin
program DSTWizard  the diagram show these value are the diameter. Anyone
call tell me these values are radius or diameter.

 

Another question is if this model can simulate the two U-tubes in same
borehole. If it can, how to input the parameters for the parameter 17
(Reference borehole flow). This flow is the total flow of the two U-tubes in
same borehole or just is the flow of one U-tube

 

Thanks

 

Lei Wang

 

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