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Mostapha Roudsari's profile - activity

2021-10-26 11:44:16 -0600 answered a question Radiance - file.ill

From your description, it is most likely generated by Daysim. If you check the header file there is a field to set the u

2021-10-26 11:44:16 -0600 received badge  Rapid Responder (source)
2021-08-19 08:42:16 -0600 commented question Not another Radiance error

Hi @Mafalda Correia! Now that I exported the model you don't need Rhino anymore. You can run the annual study yourself o

2021-08-19 08:41:30 -0600 commented question Not another Radiance error

Hi @Mafalda Correia! Now that I exported the model you don't need Rhino anymore. You can run the annual study yourself o

2021-08-18 14:21:37 -0600 commented question Not another Radiance error

While waiting for you I just gave it a try and imported the osm file in Rhino and ran a test daylight factor simulation.

2021-08-18 13:27:45 -0600 commented question Not another Radiance error

Do you have access to Rhino? I haven't used the Radiance measure for a very long time but if you have a license of Rhino

2021-08-18 09:10:23 -0600 commented question Is there a bug in Openstudio 1.2.0 where creating over 127 spaces breaks gridview?

Hi @gclark, have you tried the Pollination Rhino plugin? There is no limitation on the number of zones that you can mode

2019-11-08 09:48:16 -0600 commented question Problem with changing the HVAC COP on Honeybee

Post your question here: https://discourse.ladybug.tools/

2019-03-27 13:44:53 -0600 commented question Couldnt wrap BSDF

A better place to post this question is Radiance forum: https://discourse.radiance-online.org/

2018-10-29 10:18:41 -0600 commented question Inputing sensible and latent gains

Hi @Angeliq, I just added it as a comment so other people know this and can help you with writing the measure. The quest

2018-10-29 10:18:23 -0600 commented question Inputing sensible and latent gains

Hi @Angeliq, I just added it as a comment so other people know this and can help you with creating the measure. The ques

2018-10-29 08:37:29 -0600 commented question Inputing sensible and latent gains

If you have a measure that does change the gains Honeybee is capable of loading the measure and running it as a part of

2018-06-26 18:55:52 -0600 commented question Radiance colorpict and perforate

Let me check that for you. I didn't get any notifications to approve new accounts on Radiance discourse.

2018-06-26 13:42:10 -0600 commented question What is the (Current) State of the OpenStudio Radiance Measure?

What's happening to Radiance measure in OpenStudio reminds me of what Autodesk does to their products.

2018-06-26 13:38:03 -0600 commented question Radiance colorpict and perforate

I suggest to post this question to radiance forum: https://discourse.radiance-online.org/

2018-04-23 08:24:26 -0600 commented question Radiance command not found

What are you trying to do and what is the command you're trying to execute? Try which rad to find the installation path.

2018-04-21 07:27:35 -0600 answered a question Where is evalglare located in the Linux system

Try which evalglare command.

2017-07-27 02:01:03 -0600 received badge  Popular Question (source)
2017-06-29 15:43:48 -0600 commented answer Which data from the weather file is used by OpenStudio to run Radiance simulations?

This is a different question and not a comment. Open a new question for that.

2017-06-29 15:42:45 -0600 commented answer Which data from the weather file is used by OpenStudio to run Radiance simulations?

Thank you, Rob and Mostapha! Now I have another question which might not be relevant to this forum. But does anyone of y

2017-06-28 16:09:04 -0600 commented answer Which data from the weather file is used by OpenStudio to run Radiance simulations?

@rpg777 wea actually takes direct normal radiation and diffuse horizontal *radiation and not the illuminance.

2017-06-16 10:27:30 -0600 commented question OpenStudio has crashed

@Funky I assume you mean OpenStudio by Open Suite? Which version of Honeybee and OpenStudio are you using?

2017-03-10 10:13:13 -0600 commented answer How to match Illuminance map data from Radiance/Openstudio with .ill data

The number of lines and the number of points should be the same. In the example that I have sensors are written to separate files and are calculated separately.

2017-03-09 17:25:04 -0600 commented answer How to match Illuminance map data from Radiance/Openstudio with .ill data

Each column is for an hour and there are 8760 columns for 8760 hours however the first column is actually the results for 1 1 0.500. The wea file and so the sky is created for between the hours. Check the in.wea file under radiance\wx folder to see the values for each hour.

2017-02-27 21:38:14 -0600 commented answer Output hourly HDR for uncontrolled windows

@Determinant I'm following your conversations with Rob here. Since OpenStudio is designed to use Radiance as a support for E+ most of what you want to do needs a lot of customization. You can do most of this stuff with Honeybee[+] if you're willing to use Rhino and Grasshopper. Just another option to consider.

2016-12-05 11:31:28 -0600 marked best answer Change U-Value of Construction during the simulation with EPLUS

What is the solution to change construction properties (in this case u-value) during the simulation in EnergyPlus? Is it possible to assign a schedule to construction properties?

PS: This question is originally posted here by Christian Kongsgaard.

2016-11-09 10:39:31 -0600 answered a question Can you run Ladybug/Honeybee on RhinoWIP for Mac?

Hi @Julien Marrec, As I commented on GitHub the current version hasn't been tested on Mac. We already made a couple of changes to make it potentially work on Mac but I don't have access to mac to test it. The new Ladybug, Honeybee and Butterfly plugins will address this issue.

2016-07-15 18:35:55 -0600 answered a question How does Radiance use lux values from epw file to calculate daylighting

CIE sky is NOT generated based on the data from epw file. It only takes the location data (e.g latitude, longitude, etc). Check gensky manual for an example. If you are looking for a climate-based sky then use gendaylit.

2016-05-31 17:07:04 -0600 commented question Building Energy Optimization Research Ideas

Ladybug + honeybee don't have an optimization engine, however there are several optimization plugins for Grasshopper that can be coupled with LB+HB. The short list is Octopus, GOAT and Galapagos. As mentioned by @Waseem you will probably end up to conclude that each of the optimization engines will give you different results based on the landscape of the results and the initial population.

2016-05-24 21:34:28 -0600 received badge  Self-Learner (source)
2016-05-24 18:06:15 -0600 commented answer rcontrib misses one of the modifiers if number of modifiers between 240-420

UPDATE: The issue is solved now. Download version 5.0.1.11.

2016-05-16 20:45:51 -0600 commented answer rcontrib misses one of the modifiers if number of modifiers between 240-420

Hi Greg. Just checked again and I still need end-of-line character to get all the modifiers on Windows. I will wait for the new build of Radiance to run another test and will report back here.

2016-05-15 20:31:21 -0600 marked best answer What is the best practice to model an Atrium in EnergyPlus?

I have seen multiple discussions on EnergyPlus email list about modeling atrium (without using CFD) however I still don't have a clear idea what is the best way of modeling an atrium. I am looking for recommendations on:

  1. Preparing geometry: Should we split the atrium horizontally in each floor? or should the segments on the top of the atrium should be shorter to capture the stack effect. Is that even make sense considering the EnergyPlus will transfer the radiation as diffuse radiation between the zones?

  2. Air walls/surfaces: Assuming that there will be some sort of geometry split, what is the best suggestion for the construction of surface between the geometries?

  3. Air flow network: Again assuming that there will be some sort of geometry split, what is the best practice to set up the airflow between the atrium zones?

2016-05-15 20:31:19 -0600 received badge  Nice Question (source)
2016-05-13 16:48:22 -0600 answered a question rcontrib misses one of the modifiers if number of modifiers between 240-420

Just for clarification for later reference. This discussion end up being two different discussions which both only happens on Windows.

For original question, missing modifier between 240-420, I needed to add an empty new line at the end of all input files.

The second question, missing modifier solar1216 was a bug in Radiance on Windows which is now fixed and will work fine in newer released of Radiance.

2016-05-13 16:40:37 -0600 received badge  Enthusiast
2016-05-11 06:58:37 -0600 commented answer rcontrib misses one of the modifiers if number of modifiers between 240-420

Hi @GregWard! Thank you for checking the file. I'm using the last release. I ran the analysis for only one test point and no geometry and I still get 0 values for solar1216. If I run the analysis only for solar1216 it's visible. Something is happening when I add to number of modifiers. Maybe it only happens on Windows! We need one more Windows user to test this. @rpg777 and @Sarith any chance that you can test this file on Windows and share the results? Thanks :)

2016-05-10 18:52:19 -0600 commented question rcontrib misses one of the modifiers if number of modifiers between 240-420

Hi @Andyrew, Adding an extra line solved the issue with the number of columns but I can still create an invisible modifier. You can download the files from here. If you check columns for modifier 1217 (columns EJI, EJJ and EJK in excel) you will see that the sum of the values is equal to 0 which means none of the test points (each row is the results for one of the test points) can see the modifier. If you can't recreate the issue on your machine then it's probably a Windows specific issue. Thanks for your help!

2016-05-10 15:35:17 -0600 commented question rcontrib misses one of the modifiers if number of modifiers between 240-420

Extra line at the end changes the results. Now I get 240 columns too. I will do more tests and close this discussion if I couldn't recreate the issue. Thanks!

2016-05-10 01:34:54 -0600 asked a question rcontrib misses one of the modifiers if number of modifiers between 240-420

I'm using rcontrib to calculate number of sunlighthours for a grid of test points. With the help of @Andyrew on this previous question I'm getting accurate results as far as the number of modifiers (suns) is less then or equal to 239.

If I create between 240-420 modifiers rcontrib will generate the results for n-1 of the modifiers (239-419). You can test the this file to recreate the issue. The file is a zipped file but I had to change the extension to tiff to be able to upload it! If you unzip the file and check untitled.dc file NCOLS is 239 however number of modifiers in untitled_suns.rad is 240.

If I create more than 420 modifiers the number of columns in result file will be accurate but one of the modifiers won't be seen by the test points. In the image below you can see the area that are missing the same modifier. The rest of the points return accurate value as they are already blocked by the wall.

image description

2016-05-02 21:39:05 -0600 commented answer OpenStudio.BCLMeasure.arguments returns an empty vector

Hi @Bo_Lin, as Dan @macumber mentioned up there you need to update to OpenStudio 1.11.1 or higher to be able to use the honeybee component.

2016-05-02 10:47:06 -0600 marked best answer OpenStudio.BCLMeasure.arguments returns an empty vector

I'm using C# bindings of OpenStudio API to load measures from file, get it's arguments, modify a number of them and run the measure.

import OpenStudio

measure = OpenStudio.BCLMeasure(OpenStudio.Path(pathToMeasureDir))

args = measure.arguments()

# modify arguments, etc...

The workflow works fine for measures with a standard measure.xml (e.g. radianceMeasure) however when I test it for a measure such as Chilled Beam with DOAS, which misses the arguments tag inside the measure.xml file, it returns an empty BCLComponentVector.

If I load the measure inside OpenStudio App it loads the arguments fine. How does the app loads the arguments? Is there another API call that I should use to get the arguments?

PS: Watch this video for the workaround.