[TRNSYS-users] radiation and shadow, type 56

[Karol Bandurski]

Marion,

 

It seems to me that problem is solved.

 

I didn’t know that I should generate .shm file before simulation to take into account shading zones. 

 

When I have generated .shm files results seems ok: 

Building without surroundings consider only windows in kitchen and living (because those window are shadowed by balcony and corner, and bedroom window isn’t shadowed). Building with surroundings consider all windows, because bedroom window get ‘sunlit obstacle’. Energy demand is higher for shaded building and there is also less radiation through windows (ntype 74).

 

So, thank you for your time and hints!

If you notice some misunderstanding in my thinking let me know, please!

 

Regards,

Karol

 

From: Marion Hiller [mailto:hiller at transsolar.com] 
Sent: Thursday, December 13, 2012 9:30 AM
To: karol.bandurski
Subject: AW: RE: radiation and shadow, type 56

 

Karol, 

 

Well, does the list file contain a notice that the SHM is used during the simulation? 

 

I suggest to use NTYPE 101 and 102 for checking that Shading occurs of the  window of the bedroom. 

In winter time you need to see an effect for the Bedroom, 

If you have no external or internal shading control activated. 

 

Best, 

 

Marion 

 

Dipl.-Ing. Marion Hiller 
TRANSSOLAR: KlimaEngineering - Technologien für energieeffizientes Bauen und Nutzerkomfort in Gebäude 
Munich - New York - Stuttgart + 49.711.67976.0 

Transsolar Energietechnik GmbH, Curiestrasse 2, 70563 Stuttgart 
Amtsgericht Stuttgart - HRB 23347, Steuernummer 99073/00911, USt-IdNr.: DE152272639 

Geschäftsführer: Dipl.Ing. Matthias Schuler, Dipl.Ing. Thomas Auer, Dipl.Phys. Stefan Holst, Prof. Dipl.-Ing. Bleicher  

  

 

  _____  

   

Von: Karol Bandurski [mailto:karol.bandurski at put.poznan.pl] 
Gesendet: Mittwoch, 12. Dezember 2012 10:25
An: Marion Hiller; trnsys-users at cae.wisc.edu
Betreff: RE: radiation and shadow, type 56 

 

Dear Marion and Others 

 

I try to improve my file on myself. It seems to me that it is prepared well, but results are still strange: 

 

Building with surrounding buildings has only a little higher heating demand but there is no difference in solar gains for each version (with and without surrounding buildings). 

 

I use ntype 74 for solar radiation gains. 

 

I enclose  .bui files and .idf files exported form TRNBuild (Mnr8_alone is from MNr8, and Mnr8_shading is from Mnr8_3D_sh) 

 

I will be grateful for your time and hints! 

 

Regards, 

Karol 

------------------------------------------------ 

Karol Bandurski MSc. 

 <http://www.ee.put.poznan.pl/> Institute of Environmental Engineering 

Poznan University of Technology 

 <http://www.ee.put.poznan.pl/> www.ee.put.poznan.pl 

www.put.poznan.pl <http://www.put.poznan.pl/>  

 

 

 

From: Marion Hiller [mailto:hiller at transsolar.com] 
Sent: Tuesday, December 11, 2012 12:59 PM
To: karol.bandurski
Cc: trnsys-users
Subject: AW: radiation and shadow, type 56 

 

Karol, 

 

No this is impossible. 

 

However, the bui files aren’t the same, especially the geometric part of the Mnr8_sh contains only geometric information of 2 zones 

BATHROOM and HALL. 

Also the calculated volume isn’t the same. 

 

It looks like all the zones with the GEOMODE=MIXED are missing. How did you create shading file? 

 

I repaired you shading file concerning the geometry. Are the results now ok? 

 

Best, 

 

Marion 

 

 

 

Dipl.-Ing. Marion Hiller 
TRANSSOLAR: KlimaEngineering - Technologien für energieeffizientes Bauen und Nutzerkomfort in Gebäude 
Munich - New York - Stuttgart + 49.711.67976.0 

Transsolar Energietechnik GmbH, Curiestrasse 2, 70563 Stuttgart 
Amtsgericht Stuttgart - HRB 23347, Steuernummer 99073/00911, USt-IdNr.: DE152272639 

Geschäftsführer: Dipl.Ing. Matthias Schuler, Dipl.Ing. Thomas Auer, Dipl.Phys. Stefan Holst, Prof. Dipl.-Ing. Bleicher  

  

 

  _____  

   

   

Von: Karol Bandurski [mailto:karol.bandurski at put.poznan.pl] 
Gesendet: Dienstag, 11. Dezember 2012 00:24
An: trnsys-users at cae.wisc.edu; Marion Hiller
Betreff: radiation and shadow, type 56 

 

Dear All, 

 

I have two .bui files of the building. The first file is assumes that there is no buildings next to consider one( Mnr8), the second file contain shadow zone of  surrounding buildings (Mnr8_sh). 

 

The energy demand are higher for version with building shadow zone –it seems OK. But I am looking for solar radiation that reach building windows in each case, so I use NTYPE 69 or 74 (it is ok???). And the problem is that the building with shadow has higher values of those NTYPE then the building without shadow. How it is possible??? 

 

I will be grateful for any hints! 

 

Regard, 

Karol 

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