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

[Hall Monika]

Dear Mr. Laouadi,
 
thank you very much. Now it is clear.
 
Kind regards
Monika
 

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From: esp-r-bounces at lists.strath.ac.uk [mailto:esp-r-bounces at lists.strath.ac.uk] On Behalf Of Laouadi, Aziz
Sent: Wednesday, May 09, 2007 3:46 PM
To: Hall Monika; esp-r at lists.strath.ac.uk
Subject: [esp-r] Re: "slab-on-grade hydronic floor" to activate concret slabs


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
 

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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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