Re: air-to-earth heat exchanger

[Lee euy joon <ejlee@xxxxxxxxxxxxxxxxx>]

Dear Pierre;
Thanks for your interesting email .
Please, send your file for further discussion.
many thanks


Hollmuller Pierre wrote:

> Dear TRNSYS users,
>
> If you should deal with earth channel systems, we inform that we developped
> a TRNSYS model for (moist) air-to-earth heat exchangers (earth channels),
> that we validated so far on three real scale installations.
>
> The modeled system consists of a series of parallel tubes within a
> rectangular block of soil, swept by a flow of humid air. Flexible geometry
> allows for inhomogenous soils, diverse border conditions, description of
> surrounding soil, as well as use of symetries or pattern repetitions
> (run-time economy). Direction of the airflow can be controled
> (stratification in case of heat storage). Energy and mass balance within the
> tubes account for sensible as well as latent heat exchanges between airflux
> and tubes, frictional losses, diffusion into surrounding soil
> (3-dimensional), as well as water infiltration and flow along the tubes.
> Extension for use of water instead of air is planed, but not implemented yet.
>
> If you should be interested in this model, I can e-mail you a compressed
> WORD file (740 kB) with model description, validation and user manual
> (Please contact me directly at pierre.hollmuller@cuepe.unige.ch).
>
> Regards,
>
> Pierre Hollmuller
> *************************************************
> Pierre Hollmuller
> CUEPE (Centre d'etude des problemes de l'energie)
> Universite de Geneve
> 19, av. de la Jonction
> CH - 1205 Geneve
>
> tel: (+41) 22 / 705 7389 (direct)
>      (+41) 22 / 705 7230 (secretariat)
> fax: (+41) 22 / 705 7200
> e-mail: pierre.hollmuller@cuepe.unige.ch
> *************************************************