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RADIANCE, Five-phase method: changing output type to -oc Hi everyone, We are simulating a case study using the Five Ph

RADIANCE, Five-phase method: changing output type to -oc Hi everyone, We are simulating a case study using the Five Ph

Radiance Five-Ph-Method error 400: no view in picture Hi all, I hope I can find some help to solve this issue. I'm gene

Radiance Five-Ph-Method error 400: no view in picture Hi all, I hope I can find some help to solve this issue. I'm gene

Hi, did you manage to find a solution for this? I'm facing this problem with the most recent version of Energy Plus.

@rpg777 @Determinant Thank you for your replies! well..I'd like to have a look to it as well if possible, thank you! mii

Hi, I'm joining this conversation as my question is related. These replies are from one year ago, so I'm asking for an u

Hi all,

Can anyone advise a convenient instance to run Five phase method Radiance simulations? Last year we tried for a while with the elegible free Tier t2.micro but at some point the simulations get so heavy and it runs very slow. Is there another option that someone has tried and found it works well and its a good balance in terms of cost as well?

I'd appreciate your help

Chantal.

Thank you so much for your reply, very good points indeed, I was kind of afraid of trying the spot instance but I think

EC2 instance for Radiance Five phase method Hi all, Can anyone advise a convenient instance to run Five phase method R

Thank you so much, and sorry for the confusing explanation. In short, I want to create a system of horizontal-blinds whe

genBSDF and genblinds_BSDF material Hi Radiance experts, I'd appreaciate your help regarding the following questions: I

genBSDF and genblinds_BSDF material Hi Radiance experts, I'd appreaciate your help regarding the following questions: I

I managed to use bsdf2rad for the visualizations as well, also useful to see the difference in the distribution when using the XML with the missing data, Thank you so much for your help! Chantal

Thank you for your answers, I rephrase below in a new 'Answer' space. Regarding the sketch, I'm so afraid that my sketching skills would make things worse, so I really hope that the new explanation can be more useful to describe the issue.

Note: Thank you for your answer to question 2a. I just went on re-posting without editing that part already answered.

Thank you so much, and sorry for the confusing explanation. In short, I want to create a system of horizontal-blinds where the material is a redirecting-daylighting-system (BSDF), I rephrase:

I used genblinds to create a shading system (horizontal blinds) but instead of using a uniform reflectance material (void plastic white), I'm using the BSDF of a daylighting-redirecting system (redirecting-system.xml - which was generated by a gonio-photometer). Since the position of the blinds is horizontal, I'm assuming that first I need to place the material (XML file of the redirecting-system) in an horizontal position (in the window-BSDF file: 0 1 0 .), then the tilt of the blinds (0°, 20°, 45°), would be specified by the genblind parameters' (this is just a test, so its pretty much like in the tutorial):

genblinds cfs blinds 2 400 4 4 45 |xform -rz -90 -rx -90 -t 0 0 -.939693  > sys/blindsRS45.rad

the genblinds RAD file (blindsRS45.rad) looks like this:

# xform -rz -90 -rx -90 -t 0 0 -.939693
# genblinds cfs blinds 2 400 4 4 45

void BSDF cfs
6 0 xml/redirecting-system.xml 0 1 0 .
0
0

Then I used such file to generate an XML file using genBSDF:

genBSDF +f +b -c 500 -geom inch -dim 199 201 1.5 2.5 -.939693 0 sys/blindsRS45.rad > sys/blindsRS45.xml

Then I used the resulting XML (blindsRS45.xml) file to create a window-system where the horizontal blinds (using the redirecting-system as material) are placed behind a vertical glass pane (in this case such glass material was included in the same window-BSDF file but I know I can also add it in Window-7), thus in the final RAD file (mywindowsystem.rad) the XML position is vertical: 0 0 1

##mywindowsystem.rad

void BSDF fenestration
6 0 sys/blindsRS45.xml 0 0 1 .
0
0

fenestration polygon window
0
0
12
    10.000000  -0.010000  2.800000

My questions are, first if this approach is correct to simulate horizontal blinds using BSDF material, and then about the calculation of the interreflections occurring between the horizontal-slats, since I'm not using a diffuse uniform material (plastic) but a BSDF material, then I guess such calculation would be done using the transmission-reflection/back-front data of the XML file (incident and outgoing rays). I wonder if my understanding of this process is correct, then if the results might be at some extent inaccurate according to:

a) the following sentence in the 'Three Phase Method Tutorial' (pag. 4, 2.2 Transmission Matrix (BTDF):
'Currently, Radiance only uses the front transmission data, thus front and back reflection and back transmission are ignored by Radiance'.

b) the XML file of the original redirecting-daylighting-system was generated with a goniophotometer, where no back transmission and front and back reflection data was considered. (although the resulting BSDF-XML file contains all such data).

Hoping that my question is better described now, I thank you in advance.

Ch.

Hi Radiance experts, I'd appreaciate your help regarding the following questions:

I want to assess the performance of a window-system which is formed by daylighting-systems placed in horizontal position (parallel one above the other and certain distance in between). To test, I used genblinds and genBSDF to generate the XML file of such configuration, here the first question regarding this procedure:

1) I wonder if the correct way to indicate the tilt-position of the original daylighting-system (horizontal-slats) its by the specifications in the genblinds command (tilt 0°, 20° etc), and by indicating an horizontal position in the BSDF mat definition (window-BSDF file):

void BSDF system
6 0 system.xml 0 1 0 .
0
0

Note: the final window-assemby's position is vertical (in the final window-BSDF file: 0 0 1 .)

Hoping that this approach is correct so far, then I used the resulting XML file to obtain illuminance and to generate images, while the results seem to be as expected, I have two more questions regarding this procedure:

2) I'm assuming that in this case the calculation of the interreflections occurring between the slats would be different than when using a solid material of uniform reflectance, since I guess, the transmission/reflection-front/back data included in the XML file of the assembly (incident-outgoing rays) would be taken into account for this calculation. Then, I wonder if the results may be at some extent inaccurate according to the following:

a) the following sentence in the 'Three Phase Method Tutorial' (pag. 4, 2.2 Transmission Matrix (BTDF):
'Currently, Radiance only uses the front transmission data, thus front and back reflection and back transmission are ignored by Radiance'.

b) the XML file of the original redirecting-daylighting-system was generated with a goniophotometer, where no back transmission and front and back reflection data was considered, (although the resulting BSDF-XML file contains all such data).

I hope I have explained my questions clearly,

I thank you in advance.

Chantal.

Thats great...thank you so much for your kind replies! I'll give it a try... Chantal

Thank you so much! I really appreciate this! Best weekend...
Chantal.

Btw... May I ask if there is any way to get the results in a single output-file, without the need of extracting data from original files?

Thank you again for your help!

Ch.

HI all, Thank you for your reply (and sorry for the late one from my side)...

The problem was with the preceeding zeroes (thank you for that). I modified the script this way:

for t in {8..12}; do evalglare -d -vf view/vh1.vf imgs/back_*$t.hdr > gout/back_$t.txt; done

Strangely the first 8 images report a nul file (not zero in the results, just the file has zero bytes). But anyway after several testings with further images this doesn't seem to be a serious issue.

hi all

this might be the most basic thing but can anyone help me, I need to know if the following script is right fur applying evalglare to multiple HDR images? if so, please point me the ‘obvious’ mistake..

I have this:

for t in {8..12}; do evalglare -d -vf view/vh1.vf imgs/back_$t.hdr > gout/back_$t.txt; done

Im applying to few images to simplify the test, I checked the route by trying with a single image…but for some reason is not doing the loop, the error says: Can't open imgs/back_8.hdr Can't open imgs/back_9.hdr Can't open imgs/back_10.hdr Can't open imgs/back_11.hdr Can't open imgs/back_12.hdr

I'll appreciate your help

Chantal

Thank you, yes this is actually a redirecting system to which a glass layer was added using Window 7. I've tried what you suggested but found still some difficulties. I sent you few additional files (to the email indicated above). Or if you have any other email where I can send them please let me know. I Hope that you have time to have a look to them. Thank you in advance!

Thank you, yes this is actually a redirecting system to which a glass layer was added using Window 7. I've tried what you suggested but found still some difficulties. I sent you few additional files (to the email indicated above). I Hope that you have time to have a look to them. Thank you in advance!

I'm looking for some help about a problem I have with Energy Plus, I'm trying to run a simulation using a BSDF-window system that I created with Window 7, but I get this error msg:

* Severe * Window tarcog returned an error * ~~~ * message = "Tarcog failed to converge" During Warmup, Environment=RUN PERIOD 1, at Simulation time=01/01 00:15 - 00:30 * ~~~ * surface name = G1UP * ~~~ * construction name = CF_GLZ_75

That I guess refers to the field corresponding to FenestrationSurface:Detailed and located in the Thermal zones and surfaces (to reference it to the BSDF-IF file):

Thermal Zones and Surfaces --> [0006] FenestrationSurface: Detailed --> Name: g1up; Surface type: window; Construction Name: CF_Glz_75;

I'm using the editor so I'm also adding details from the BSDF-IDF file to: Construction:ComplexFenestrationState and Matrix:TwoDimensions

I thought at first that it was a problem with the version of Energy Plus but previous and the current version give the same error.