[TRNSYS-users] freezing conditions for BHP-heat exchanger

[Jeff Thornton]

> i am modelling heat pump systems for some performance investigations.
> I was wondering if anybody has got experience with ground coupled heat
> exchangers (horizontal loop, e.g. Type 556/TESS) that take freezing into
> account?

Michael,

The Type 556 model has been recently replaced in our inernal modeling
projects with two new models.  A single buried pipe model (Type 952) and a
horizontal ground heat exchanger model (Type 916).  However, neither of
these two models account for freezing of the ground.  BUT - the source
code is available for these models and you could likely add the freezing
impact to the nodal energy balances without too much trouble.  Both of
these new models will be made available in the next release of our
libraries or can be purchased before that time.  Good luck with your
studies.

Jeff



Jeff Thornton
President - TESS, LLC

2916 Marketplace Drive - Suite 104
Madison WI 53719 USA

Phone: 608-274-2577
Fax: 608-278-1475
E-mail: thornton at tess-inc.com
Web: www.tess-inc.com