Re: [TRNSYS-users] Integrate Thermo Active Layer into 1D Model

["Matt Duffy" <duffy@tess-inc.com>]

Hello Devin,

I just want to give you a heads-up about a couple of things. The active layer slab heating in Type56 is a semi-empirical relationship. Furthermore, the massive walls in Type56 are subject to the wall conduction transfer function. I am not really sure if that is helpful, but I thought I would let you know.

Best regards,

Matt Duffy

----- Original Message -----
From: "Devin Rohan" <drohan@purdue.edu>
Sent: Thu, April 14, 2011 18:04
Subject: [TRNSYS-users] Integrate Thermo Active Layer into 1D Model

I'm building a 1D finite difference model for a r! oom with embedded tubing in a concrete floor.  In my model, I have a node on the floor surface, a node halfway deep into the concrete (I assume this node has thermal capacitance), and a node on the bottom layer of the concrete floor.  Is it possible to integrate the thermo active model in Type 56 into my 1D model to find the mean water temperature?  I'm not quite sure what my heat flow through the resistances from the water to the node Theta_K (temperature of the pipe plane) since I don't know any other temperatures (pipe shell, mean water).  In addition I'm not sure if I can assume my node in the middle of the floor, that takes into account the floor capacitance in the 1D model, to be the same node as Theta_K.  If anybody can help, it would be most appreciated.

--
Devin M. Rohan
drohan@purdue.edu

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