[Bldg-sim] Bldg-sim] Modeling tool for daylight, Energy, Thermal comfort analysis

[ali hamada fakra]

Dear Prof. Haberl,

Is that your remarks are addressed directlty to me ? is what I do  
understand that you criticize the software CODYRUN ? If this is not  
the case, I apologize to you for that question.

best regards.

A. H. Fakra

Le 25 avr. 11 à 06:49, Jeff Haberl a écrit :

> Hamada,
>
> Unfortunately, you've chosen the worst possible building for  
> analysis. There are several reasons for this.
>
> First, there is no single U.S. tool that does an accurate analysis  
> of what you are asking for. There are some that perform simplified  
> analysis of most of the parameters you are looking for, but none do  
> it all right (that I’m aware of). Some of the European codes are  
> getting close, for example ESPr and/or IES/VE, but each has its  
> limitations.
>
> To estimate the thermal analysis with Visual DOE (i.e., DOE-2.1e) or  
> EQUEST (i.e., DOE-2.2) you’d need to have at least one zone that is  
> conditioned in order to simulate conditions in an unconditioned  
> space. So, although it is possible to perform such a simulation, you  
> have to go to great lengths to do this with canned simulations such  
> as DOE-2.1e and DOE-2.2. One successful project that did this for a  
> Buddhist temple was done by Dr. Sreshthaputra, which you can read  
> about in:
>
> Sreshthaputra, A., Haberl, J., Andrews, M. 2004. “Improving Building  
> Design and Operation .of a Thai Buddhist Temple,” Energy and  
> Buildings, Vol. 36, pp. 481-494.
>
> Or in his thesis:
>
> Atch Sreshthaputra, 2004. “Building Design and Operation for  
> Improving Thermal Comfort in Naturally Ventilated Buildings in a Hot  
> and Humid Climate,” Department of Architecture, Texas A&M University.
>
> In this work, which was calibrated to real data from the temple,  
> Atch created a fictitious zone that did nothing, then proceeded to  
> model the temple as a unconditioned zone, which worked with one  
> exception that it did not handle the air flows. To get around this  
> Atch ran CFD with a program that used a 3D model from the CHAM  
> engine, then passed the airflows back to DOE-2 each hour to do the  
> run, which calculated the dynamic heat transfer, then back to the  
> CFD for the next hour’s airflow, etc., (taking 24 hours to simulate  
> 24 hours on 2003ish Pentium, not exactly fast).
>
> Second, you can probably get an estimate of the daylighting using  
> DOE-2.1e or DOE-2.2 that should be accurate for and sidelights if  
> you know the internal geometry, including surface characteristics,  
> since they use the split-flux method. More accurate daylighting  
> simulations can be done with RADIANCE or annual simulations with  
> DAYSIM, or perhaps one of the new annual variants of RADIANCE.
>
> Third, true calculations of thermal comfort would require CFD and a  
> internal radiation network (should interior surfaces get hot or  
> cold), which further complicate things.
>
> So, it can be done, but there are only a few efforts in the  
> literature that give solid advice on how to do this, probably more  
> as time goes on. Getting all this in one package is probably not  
> there yet. Probably still a good topic for a Ph.D. thesis.
>
> Jeff
>
>
> 8=!  8=)  :=)  8=)  ;=)  8=)  8=(  8=)  8=()  8=)  8=|  8=)  :=')   
> 8=)8=?
>
> Jeff S. Haberl, Ph.D.,P.E., FASHRAE..............jhaberl at tamu.edu
>
> Professor 
> ............................................................Office  
> Ph: 979-845-6507
>
> Department of Architecture.............................Lab Ph: 
> 979-845-6065
>
> Energy Systems Laboratory.............................FAX:  
> 979-862-2457
>
> Texas A&M University.....................................77843-3581
>
> College Station, Texas, USA, 77843..................URL:www.esl.tamu.edu
>
> 8=/  8=)  :=)  8=)  ;=)  8=)  8=()  8=)  :=)  8=)  8=!  8=)  8=?  
> 8=)8=0
> From: bldg-sim-bounces at lists.onebuilding.org [bldg-sim-bounces at lists.onebuilding.org 
> ] on behalf of ali hamada fakra [fakra at univ-reunion.fr]
> Sent: Thursday, April 21, 2011 11:32 PM
> To: bldg-sim at lists.onebuilding.org
> Subject: [Bldg-sim] Bldg-sim] Modeling tool for daylight, Energy,  
> Thermal comfort analysis
>
> Message: 2
> Date: Thu, 21 Apr 2011 10:47:20 +0530 (IST)
> From: Rathna Shree <rathnashreep at yahoo.in>
> To: bldg <bldg-sim at lists.onebuilding.org>
> Subject: [Bldg-sim] Modeling tool for daylight, Energy, Thermal
> comfort analysis
> Message-ID: <935834.21570.qm at web95906.mail.in.yahoo.com>
> Content-Type: text/plain; charset="utf-8"
>
> Dear All,
>
> Can you please suggest the best modeling tool which has the  
> capabilities to perform Daylight simulation, Thermal comfort  
> analysis in non AC spaces of a building and Energy simulation.
>
> I am using dialux for daylight simulation, Visual Doe for Energy  
> simulation and Transys for Thermal comfort analysis. I am inputting  
> the same details thrice in different softwares. So is there any  
> software which can perform all the 3 analysis in one go.
>
> Regards,
> Rathnashree
>
>
> ------------------------------------------------------------
>
> Hello Rathmashree,
>
> I suggest you use CODYRUN. Is a french software dedicated to both  
> research and consulting firms. You can make the 3 studies (Energy  
> simulation, Daylight and thermal confort).that you want at the same  
> time. For more information about this software, you can write to   
> Professor Harry Boyer (Founder of the software) to this mail : harry.boyer at univ-reunion.fr
>
> Best regards,
>
> PhD / Engineer A. H. Fakra
>
>
>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/bldg-sim-onebuilding.org/attachments/20110425/4ca5e1e3/attachment-0002.htm>