Re: [TRNSYS-users] radiant cooling in TRNSYS

[a8304506@graduate.hku.hk]

Hello, Enyuan.

We previously developed models for passive and active chilled beams which were
based on interpolation of catalogue data from manufacturers.  The capacities of
the chilled beams are calculated according to the entering chilled water
temperature and the room temperature.  The cooling effects of the chilled beams
are then reflected through a gain type (negative heat gain) in Type56.  A
radiative load ratio is applied to divide the chilled beam capacity into
radiative part and convective part.  You may refer to the reference below:

K.F. Fong, T.T. Chow, C.K. Lee, Z. Lin, L.S. Chan, Solar hybrid cooling system
for high-tech offices in subtropical climate – Radiant cooling by absorption
refrigeration and desiccant dehumidification, Energy Conversion and Management,
52(1), 2883-2894, 2011.

Best Regards
C. K. Lee

Quoting David BRADLEY <d.bradley@tess-inc.com>:

> Enyuan,
>    I am not aware of any such components. We wrote a radiator model (in 
> the TESS HVAC Library for v17) but it uses algorithms that were 
> developed for heating applications and (among other things) doesn't 
> account for any possible condensation that might occur on the panel. I'd 
> be interested if you find any such models; even if they are just 
> algorithms, it should not be difficult to code them into a TRNSYS Type
> Best,
>   David
> 
> 
> On 4/6/2013 20:25, Enyuan Hu wrote:
> > Dear all,
> >
> > Previously I worked on the radiant cooling using active layer in type 
> > 56. Now I wish to build some model that radiant panels are separated, 
> > instead of being part of the building, like what people can do for the 
> > retrofitting. Is there any related components in the library that I 
> > can make use of? Thanks.
> >
> > cheers,
> > Enyuan
> >
> >
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> > TRNSYS-users@cae.wisc.edu
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> 
> -- 
> ***************************
> David BRADLEY
> Principal
> Thermal Energy Systems Specialists, LLC
> 22 North Carroll Street - suite 370
> Madison, WI  53703 USA
> 
> P:+1.608.274.2577
> F:+1.608.278.1475
> d.bradley@tess-inc.com
> 
> http://www.tess-inc.com
> http://www.trnsys.com
> 
>