[TRNSYS-users] Type 36-Trombe Wall

[saleh saadi]

Hi Vali, 


I don't know if you got a reply to your question. I have recently gone 
through the source code as well. The number '2' appears for the first 
and last node of the finite difference equation because of the 1/2 node 
concept. When you discretize the PDE, you divide by 1/2 gird size for both node 1 and last node, and therefore '2' will be in the numerator. 

regards,


________________________________
 From: Vali Gheorghisor <valigheorghisor at yahoo.com>
To: "trnsys-users at cae.wisc.edu" <trnsys-users at cae.wisc.edu> 
Sent: Monday, March 26, 2012 1:47 PM
Subject: [TRNSYS-users] Type 36-Trombe Wall
 

Hello Trnsys users,

I use Type 36 with Type 56 to simulate a Trombe Wall. Everything works well but I don't understand 

one thing concerning the Source Code for Type 36. I don't understand why the big parantheses for 

DTDT(1) and DTDT(N) are multiplied by 2. I analyzed the whole Source Code but I can't see where that "2"
is coming from. This is important for me because I also try to develop a type for a different Trombe Wall that the one 

defined in Type 36. And that "2" makes a pretty big difference between the results.

Can someone help me?

Thank you in advance

Vali Florin

Politechnical University of Bucharest


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