[esp-r] Re: "slab-on-grade hydronic floor" to activate concret slabs

[Laouadi, Aziz]

Dear Monika,
 
The "injection node number" means the node in the construction layer
where heat is injected in or retrieved from (in other words, the
position of the water pipe in the layer).  Note that ESP-r uses three
nodes per construction layer and the node numbering starts from the
exterior.
 
Example: insulated slab on grade:
 
Layer 1- insulation in contact with ground: node 1 (surface in contact
with ground, 2 (centre) and 3 (surface in contact with slab).
Layer 2-concrete slab in contact with interior environment: node 4
(surface in contact with insulation, 5 (centre) and 6 (surface in
contact with room air).
 
So if pipes are placed in the centre of slab, the injection node number
will then be 5.
 
Note, you may add additional layers on top of slab, or you may
sub-divide a thick slab into a number of sublayers to get more accurate
results.  In this case, just follow the node numbering as explained
above or in ESP-r manual.
 
I hope this helps.
 
 
A. Laouadi
 

________________________________

From: esp-r-bounces at lists.strath.ac.uk
[mailto:esp-r-bounces at lists.strath.ac.uk] On Behalf Of Hall Monika
Sent: Wednesday, May 09, 2007 7:40 AM
To: esp-r at lists.strath.ac.uk
Subject: [esp-r] "slab-on-grade hydronic floor" to activate concret
slabs


 
Dear esp-r users,
 
I use the plant component "slab-on-grade hydronic floor" to activate
concret slabs. Does anybody know what the parameter " Injection node
number (integer)" means? 
 
I down loaded the report from Mr Laouadi:
"Development of a radiant heating and cooling model for building energy
simulation software", but I did not found what it could be.
 
It would be nice, if somebody could help me.
 
Best regards
Monika
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