[esp-r] Re: My question about change thermophysical properties

[Achim Geissler]

Dear Helia

1- have you looked in the CookBook? Also, this feature has been available quite a long time and should be covered in the version 9 users manual (available at ESRU web site).

2- yes, I would expect that specific heat and thermal conductance of the PCM will be used regardless of the changed construction properties. All other properties should be used from the changed set. Be aware that changing the layer thickness by thermophysical property control will not increase/decrease the amount of PCM in that layer, I expect.

3- either split up a surface in your model into two surfaces of identical size or, thinking about it, make two zones side by side - then the energy calculations will also show the difference between the two scenarios and may give additional information on what is actually going on. Two "shoe box models" should suffice.

Probably there actually will be coding necessary to really "remove" the PCM for a switched construction - or better "move it to a different surface" is probably what happens? Maybe a short description of what you are actually moving in real life would help (others in the group also, never give up hope) to help.

Best
Achim


On Sep 1, 2013, at 12:35 PM, helia.taheri at ut.ac.ir wrote:

> Dear Prof. Achim,
> 
> Thanks alot for your encouragement and your guidance.
> Some question I have about your answers and suggestions:
> 1- About your first answer, How can I read exactly about change
> thermophysical properties in ESP-r? I try it by myself but I really need
> guidance!
> 
> 2- You mean that it isn't important what is the specific heat of the layer
> that I want to put PCM instead of it? The specific heat will be inputed
> for PCM, but Density and Thickness will be as the same as the layer that I
> want to put PCM in it, am I right?
> 
> 3- I didn't understand your suggestion in the sentence: "Probably setting
> up a model with side-by-side surfaces which use thermophysical property
> changing but only one of which has PCM added is a good idea to check what
> actually happens" Side by side? what do you mean exactly?
> 
> It is very important for me to do that. If ESP-r can't do that, May be I
> try to do coding!!! I don't know!!!
> Thanks alot,
> 
> Best,
> Helia
> 
> 
> 
> 
> 

achim.geissler at intergga.ch