[esp-r] Re: Documentation and examples of slab-on-grade plantcomponent use?

[Haddad, Kamel]

Jon,

To control the operation of the slab heating/cooling, you will have to
control the pump feeding the hydronic system. This is a small
modification to the test file that comes with the general release of
ESP-r. The model will work with any type of heating/cooling equipment. 

Kamel Haddad. 

-----Original Message-----
From: esp-r-bounces at lists.strath.ac.uk
[mailto:esp-r-bounces at lists.strath.ac.uk] On Behalf Of Jon Hand
Sent: October 5, 2008 22:59
To: Ferguson, Alex
Cc: esp-r at lists.strath.ac.uk
Subject: [esp-r] Re: Documentation and examples of slab-on-grade
plantcomponent use?


Alex and others in the ESP-r community...

I have been looking at the radiant floor heating model in the tester
models (rhc-plant.cfg). I am wanting to get up to speed with floor
heating models (they do a lot of this in Korea). The plant components
used in this model is a start but it is difficult to extrapolate several
issues from this model:

a) the model only includes a plant network and there is no
   control file so I am not sure if the non-condensing 
   boiler & aquastat control; 2 node IEA Annex X and the 
   Slab-on-grade hydronic floor can be controlled or if one
   would only attempt to control the pump;

b) the tester.pl model seems to use a one hour timestep and
   that is rather different from most models with plant. Are
   these components suitable for running at such a long timestep?

c) injections of heat into ground facing surfaces tend to work
   but, typically injections into structural slabs have caused
   strange control behavior in the past (the adjacent zone
   does not know about the injection). 

   So - does anyone know if
   the slab-on-grade component can be used with a surface which
   is a structural slabe between between two thermal zones?  Is
   there another way to do this other than the thin-zone approach?

Are there some good examples of the use of floor heating models that
someone might wish to contribute to the exemplars so that others will
have an idea how to use and implement such facilities?

Regards, Jon Hand

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