Re: Question about type 81 (Borehole model (Dr. P. Pahud)

[Martin Gut <gut@xxxxxxxxxxxxxx>]

Dear Maurice,

one reason for a "Range check error" in this type is when the maximum distance
between the boreholes
is bigger than the size of  the coordinate system of the boreholes.

The sum of your rings around the boreholes is less than  10 m
make the rings larger or define more rings.

For a short test replace the last value (1.25) to 10 and try it again

4 0.01 2 0.03 3 0.04 2 0.16 2 0.31 2 0.62 2 1.25

Regards,

Martin Gut

"Jong, M.J.M." wrote:

> Dear Trnsys-users,
>
> At this moment I am simulating a house with a heat pump that is connected to
> a ground heat exchanger. For the ground heat exchanger, I use type 81,
> called "The Superposition Borehole Model" by Dr. D. Pahud, Dr. A. Fromentin
> and J.C. Hadorn.
>
> I want to simulate a system with 3 ground heat exhangers with a lenght of 30
> m. each. The centre to centre distance between the heat exchangers is 10 m.
> This model uses an input parameter file for configurating the borehole heat
> exchanger. Below this file is shown.
>
> ******************************************************************
>
> BODEMWARMTEWISSELAAR PVT BODEMREGENERATIE
> 2
> 1Q
> 0.1
> 7
> 4 0.01 2 0.03 3 0.04 2 0.16 2 0.31 2 0.62 2 1.25
> 2.4 2.5E6
> 0 FILE
> 10
> 10 0.0
> 0 FILE
> 1
> 3
> 28 2  0
> 0 -10 0
> 0 0 0
> 0 10 0
> 6
> 0
> 0
> 1
> 0D 365D1H
> 0D 365D
> 0D 30D 180D 365D
> 1
> 0D 3650D1H
> 2
> 1
> 0.001 1000 4.19E6 0.6
> 2300 2300
> 0.0102 0.0125 0.42
> 1.5 0.05 0.05 0.1
> 0
> END
>
> ******************************************************************
>
> The lines 0 -10 0
>               0 0 0
>               0 10 0
> are the coordinates of the boreholes. As you can see, I have 1 symmetry
> group, with 3 boreholes in the symmetry group. When I want to run my
> simulation, I get the message "Range check error".
>
> When I modify my model to a model with 1 borehole, everything is OK. Does
> anybody know what I do wrong ?
>
> With kind regards,
>
> Maurice Jong.
>
> ============================================================================
> ======
>
> Maurice Jong
> ECN - Energy research Centre of the Netherlands         Department: Zon,
> Group DEGO
> P.O. Box 1    1755 ZG  Petten                           Country:   The
> Netherlands
> Telephone:    +31 (0)224 564938                         Fax:       +31
> (0)224 568966
> E-mail: jong@ecn.nl                                     Internet:
> http://www.ecn.nl/dego/main.html
>
> ============================================================================
> ======

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  Dipl.-Ing. Martin Gut
  TRANSSOLAR Energietechnik GmbH
  Curiestr. 2
  70563 Stuttgart
  Germany
  Tel. ++49 711 67976 196
  Fax  ++49 711 67976 11
  Mail gut@transsolar.com
  Web  www.transsolar.com

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