[TRNSYS-users] Fwd: TESS library - GHP library - Vertical BHE, U-tube -Fluid-to-ground resistance

[Damien Casetta]

Hi,

I will try to ask this question once more. I know it is very specific but
some of the users are working with this component so they may have an
answer.

It´s about Type 557b "vertical GHE", parameter 11 and 12.

If we set "negative pipe-to-pipe resistance" to 0, can "fluid-to-ground
resistance" be compared to the effective borehole resistance as defined in
the infinite line source approximation for instance?

I am not interested in using the other proforma "557a" because the borehole
geometry (especially the shank spacing) is not controlled in my case.

Thanks in advance,

Best regards,

On 25 April 2012 23:52, Damien Casetta <damien.casetta at gmail.com> wrote:

> Thank you.
>
> Regards
>
>
> On 25 April 2012 20:18, <thornton at tess-inc.com> wrote:
>
>> **
>>
>> Damien,
>>
>>
>>
>> The units of thermal resistance for Parameter 11 is h.m.K/kJ.  We'll
>> update the proforma.
>>
>>
>>
>> Jeff
>>
>>
>>
>>
>>
>> On 2012-04-25 07:04, Damien Casetta wrote:
>>
>> Jeff,
>>
>> I've read the documentation. It, indeed, gives a good understanding of
>> the model but is not detailed enough.
>> Knowing the unit I am asking for would actually solve my problem. Shall I
>> go through the code then and hopefully I will come across some comments
>> explaining what this "any" unit is?
>>
>> Thanks,
>> Regards,
>>
>> On 24 April 2012 19:32, Jeff Thornton <thornton at tess-inc.com> wrote:
>>
>>> Damien,
>>>
>>> I am not the author of the model - just the author of the proforma.
>>> Have you looked through the documentation fot the model in the .\TESS
>>> Libraries\Documentation\GHP Library folder?  The DST description document
>>> does a nice job explaining the thermal process used by the model.
>>>
>>> Jeff
>>>
>>>
>>> Jeff Thornton
>>> President - TESS, LLC
>>>
>>> 22 North Carroll Street - Suite 370
>>> Madison WI 53703 USA
>>>
>>> Phone: 608-274-2577
>>> Fax: 608-278-1475
>>> E-mail: thornton at tess-inc.com
>>> Web: www.tess-inc.com
>>>
>>>
>>>
>>>
>>> *----- Original Message -----*
>>> *From:* "Damien Casetta" <damien.casetta at gmail.com>
>>> *Sent:* Tue, April 24, 2012 9:40
>>> *Subject:* Fwd: TESS library - GHP library - Vertical BHE, U-tube
>>> -Fluid-to-ground resistance
>>>
>>>    Jeff,
>>>
>>> I forward you the e-mail I sent a couple of days ago the list as you are
>>> the component's author according to the proforma .
>>>
>>> I would add to specify my first question:
>>>
>>> If we set "negative pipe-to-pipe resistance" to 0, can "fluid-to-ground
>>> resistance" be compared to the effective borehole resistance as defined in
>>> the infinite line source approximation for instance?
>>>
>>> Thanks in advance,
>>>
>>> Best regards,
>>>
>>> ---------- Forwarded message ----------
>>> From: Damien Casetta <damien.casetta at gmail.com>
>>> Date: 22 April 2012 12:37
>>> Subject: TESS library - GHP library - Vertical BHE, U-tube -
>>> Fluid-to-ground resistance
>>> To: trnsys-users at cae.wisc.edu
>>>
>>>
>>> Hi,
>>>
>>> When using a vertical borehole heat exchanger (with known resistance),
>>> how the so-called "fluid-to-ground" resistance is defined? Practically, in
>>> the particular case of a U-tube heat exchanger, is it an "effective"
>>> thermal resistance (if there was only one tube) or the thermal resistance
>>> for a single tube?
>>> One more thing, the unit is not that clear ("any"). Is it [(m.K)/W]?
>>>
>>> Thanks in advance,
>>>
>>> Have a nice day,
>>>
>>> Regards,
>>>
>>> --
>>> *Damien Casetta*
>>>
>>> *Chalmers University of Technology *| Energy and Environment | Exchange
>>> student
>>> *INSA Lyon* Génie Energétique et Environnement | Elève ingénieur
>>>
>>> +46.7.60.66.31.45
>>> +33.6.71.78.03.75
>>>
>>>
>>>
>>>
>>> --
>>> *Damien Casetta*
>>>
>>> *Chalmers University of Technology *| Energy and Environment | Exchange
>>> student
>>> *INSA Lyon* Génie Energétique et Environnement | Elève ingénieur
>>>
>>> +46.7.60.66.31.45
>>> +33.6.71.78.03.75
>>>
>>
>>
>> --
>> *Damien Casetta*
>> *Chalmers University of Technology *| Energy and Environment | Exchange
>> student
>> *INSA Lyon* Génie Energétique et Environnement | Elève ingénieur
>> **
>> +46.7.60.66.31.45
>> +33.6.71.78.03.75
>>
>>
>>
>
>
>
> --
> *Damien Casetta*
>
> *Chalmers University of Technology *| Energy and Environment | Exchange
> student
> *INSA Lyon* Génie Energétique et Environnement | Elève ingénieur
> **
> +46.7.60.66.31.45
> +33.6.71.78.03.75
>
>


-- 
*Damien Casetta*

*Chalmers University of Technology *| Energy and Environment | Exchange
student
*INSA Lyon* Génie Energétique et Environnement | Elève ingénieur
**
+46.7.60.66.31.45
+33.6.71.78.03.75
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