ASE CALCULATION - Grasshopper2024-03-28T09:07:35Zhttps://www.grasshopper3d.com/forum/topics/ase-calculation?groupUrl=ladybug&commentId=2985220%3AComment%3A1711622&x=1&feed=yes&xn_auth=no/bump
This is an interesting…tag:www.grasshopper3d.com,2017-03-14:2985220:Comment:17116222017-03-14T08:12:34.342ZTheodoros Galanoshttps://www.grasshopper3d.com/profile/TheodorosGalanos
<p>/bump</p>
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<p>This is an interesting thread and upcoming release should add a lot of discussion to it.</p>
<p>/bump</p>
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<p>This is an interesting thread and upcoming release should add a lot of discussion to it.</p> There may be an alternative t…tag:www.grasshopper3d.com,2016-09-26:2985220:Comment:16058972016-09-26T17:17:59.330ZMathias s nhttps://www.grasshopper3d.com/profile/Mathiassn
<p>There may be an alternative to using Radiance for the ASE calculations.</p>
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<p>but since ASE doesnt need bounces of diffuse light, why don't anyone use the SunPath's SunVectors per hour and MeshRay or Occlusion to see, precisely, when different points in the grid are hit by the sun. I mean, in most cases, if there is direct sun, then it would be >1000 lux, if LT is not super low. As an extra, the solarIrradiation from the EPW file could tell what the direct-normal irradiation…</p>
<p>There may be an alternative to using Radiance for the ASE calculations.</p>
<p></p>
<p>but since ASE doesnt need bounces of diffuse light, why don't anyone use the SunPath's SunVectors per hour and MeshRay or Occlusion to see, precisely, when different points in the grid are hit by the sun. I mean, in most cases, if there is direct sun, then it would be >1000 lux, if LT is not super low. As an extra, the solarIrradiation from the EPW file could tell what the direct-normal irradiation is.</p>
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<p>If this could be set up in a multi thread workflow, it might be feasible ?</p> Hi Cheney,
Yes. It's possible…tag:www.grasshopper3d.com,2016-05-01:2985220:Comment:15201932016-05-01T21:00:11.733ZMostapha Sadeghipour Roudsarihttps://www.grasshopper3d.com/profile/MostaphaSadeghipour
<p>Hi Cheney,</p>
<p>Yes. It's possible to do it with Honeybee but there are technical issues with using Daysim for calculating ASE. Read Sarith comments <a href="http://www.grasshopper3d.com/group/ladybug/forum/topics/ase-calculation?commentId=2985220%3AComment%3A1400180&groupId=2985220%3AGroup%3A658987" target="_blank">here</a>.</p>
<p>I can put an example together. You can use dynamic blind workflow and check the results for each hour but let me not do it until we have a Radiance-based…</p>
<p>Hi Cheney,</p>
<p>Yes. It's possible to do it with Honeybee but there are technical issues with using Daysim for calculating ASE. Read Sarith comments <a href="http://www.grasshopper3d.com/group/ladybug/forum/topics/ase-calculation?commentId=2985220%3AComment%3A1400180&groupId=2985220%3AGroup%3A658987" target="_blank">here</a>.</p>
<p>I can put an example together. You can use dynamic blind workflow and check the results for each hour but let me not do it until we have a Radiance-based workflow. Anytime that I have shared example files with caveats, even though I always clearly explained the limitations, I saw them being used by users without considering the limitations. Not everyone is knowledgeable as you.</p>
<p>Let us share the workflow with you once we have the Radiance based method ready :). Fortunately you have some alternative workflows for now to get it done.</p>
<p>Cheers,</p>
<p>Mostapha</p> Hi Mostapha,
Thanks for your…tag:www.grasshopper3d.com,2016-05-01:2985220:Comment:15203212016-05-01T17:18:56.778ZCheneyhttps://www.grasshopper3d.com/profile/Cheney
<p>Hi Mostapha,</p>
<p>Thanks for your clarification!</p>
<p>Actually I am using one room+ single window in HB for my parametric study which will help architects make design decision at initial design stage. Am I right to say, based on your reply, that it is still possible to follow IES LEM-83-12 to estimate sDA in HB? It would be great if you are able to show me any example or workaround.</p>
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<p>For LEED v4 calculation, currently I am using Diva4Rhino. But I am very interested in the…</p>
<p>Hi Mostapha,</p>
<p>Thanks for your clarification!</p>
<p>Actually I am using one room+ single window in HB for my parametric study which will help architects make design decision at initial design stage. Am I right to say, based on your reply, that it is still possible to follow IES LEM-83-12 to estimate sDA in HB? It would be great if you are able to show me any example or workaround.</p>
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<p>For LEED v4 calculation, currently I am using Diva4Rhino. But I am very interested in the HB/OpenStudio workflow and expect to compare sDA/ASE results generated by different workflows. According to my current understanding, it is very difficult to achieve LEED v4 daylight points under option 1. </p>
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<p>Thanks again for your prompt reply.</p>
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<p>Regards, Cheney</p>
<p> </p> Theodore already answered the…tag:www.grasshopper3d.com,2016-04-30:2985220:Comment:15197302016-04-30T23:30:38.761ZMostapha Sadeghipour Roudsarihttps://www.grasshopper3d.com/profile/MostaphaSadeghipour
<p>Theodore already answered the questions but just for the future reference the short answers are:</p>
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<p>1. No. You can rotate it inside Grasshopper either before creating Honeybee objects using Grasshopper native components or after that using RotateHBObjects component.</p>
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<p>2. That will change the analysis results. My comment was about the north component and not the north input.</p>
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<p>Theodore already answered the questions but just for the future reference the short answers are:</p>
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<p>1. No. You can rotate it inside Grasshopper either before creating Honeybee objects using Grasshopper native components or after that using RotateHBObjects component.</p>
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<p>2. That will change the analysis results. My comment was about the north component and not the north input.</p>
<p></p> Hi Cheney,
Currently Honeybe…tag:www.grasshopper3d.com,2016-04-30:2985220:Comment:15196042016-04-30T23:27:03.813ZMostapha Sadeghipour Roudsarihttps://www.grasshopper3d.com/profile/MostaphaSadeghipour
<p>Hi Cheney,</p>
<p></p>
<p>Currently Honeybee is using Daysim which unless you have only a single window in your room, or all the blinds go up and down together can't model blind operations as suggested by IES LEM-83-12. Sarith is implementing Radiance's 3-5 phase methods to Honeybee which will make the process possible.</p>
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<p>Your best bet at this point is OpenStudio and using RadianceDaylight measure. Honeybee let's you to export the model as osm and then you can use OpenStudio for…</p>
<p>Hi Cheney,</p>
<p></p>
<p>Currently Honeybee is using Daysim which unless you have only a single window in your room, or all the blinds go up and down together can't model blind operations as suggested by IES LEM-83-12. Sarith is implementing Radiance's 3-5 phase methods to Honeybee which will make the process possible.</p>
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<p>Your best bet at this point is OpenStudio and using RadianceDaylight measure. Honeybee let's you to export the model as osm and then you can use OpenStudio for the rest.</p>
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<p>We also have an experimental workflow under development that let's you run OpenStudio measures form inside Honeybee but it won't work for daylighting measure for some OpenStudio limitations that you can read <a href="https://github.com/mostaphaRoudsari/Honeybee/issues/290" target="_blank">here</a> and <a href="https://github.com/mostaphaRoudsari/Honeybee/issues/402" target="_blank">here</a>.</p> My two cents here...
sDA cal…tag:www.grasshopper3d.com,2016-04-30:2985220:Comment:15194972016-04-30T19:00:58.388ZCheneyhttps://www.grasshopper3d.com/profile/Cheney
<p>My two cents here...</p>
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<p>sDA calculation and 2% rule are dictated by IES LM-83-12 and LEED v4 adopts sDA metric. Unlike DA or other annual metrics, blind operation should be embedded in sDA calculation. The aim is to prevent <span>overestimating the amount of usable light or underestimating lighting energy consumption (Daylighting performance will be penalized when users will lower blind to prevent potential glare issue at certain period of time).</span></p>
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<p><span>More…</span></p>
<p>My two cents here...</p>
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<p>sDA calculation and 2% rule are dictated by IES LM-83-12 and LEED v4 adopts sDA metric. Unlike DA or other annual metrics, blind operation should be embedded in sDA calculation. The aim is to prevent <span>overestimating the amount of usable light or underestimating lighting energy consumption (Daylighting performance will be penalized when users will lower blind to prevent potential glare issue at certain period of time).</span></p>
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<p><span>More details could be found at</span> <span><a href="https://blog.lightstanza.com/2016/02/05/sda-4-step-1-blinds-operations/" target="_blank">sDA and blinds operation</a> </span></p>
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<p><span>I have the same question whether HB can support sDA calculation. </span></p>
<p> </p> Thanks Theodore, your reply g…tag:www.grasshopper3d.com,2016-04-30:2985220:Comment:15195522016-04-30T18:35:38.434ZCheneyhttps://www.grasshopper3d.com/profile/Cheney
<p>Thanks Theodore, your reply gives me the confidence to proceed my parametric study. </p>
<p>Thanks Theodore, your reply gives me the confidence to proceed my parametric study. </p> This is a very interesting di…tag:www.grasshopper3d.com,2016-04-30:2985220:Comment:15192462016-04-30T06:38:36.136ZTheodoros Galanoshttps://www.grasshopper3d.com/profile/TheodorosGalanos
<p>This is a very interesting discussion, especially with the upcoming LEED v4.</p>
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<p>I will soon try some calculations of the sort, I actually did use Chris's definition with very good results so far. However, I did not compare results to v4 criteria yet. In my specific region, I would think achieving ASE would be very easy due to very low direct illuminance, which makes it interesting for other people around the world to share any results they get on this.</p>
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<p>I had a…</p>
<p>This is a very interesting discussion, especially with the upcoming LEED v4.</p>
<p></p>
<p>I will soon try some calculations of the sort, I actually did use Chris's definition with very good results so far. However, I did not compare results to v4 criteria yet. In my specific region, I would think achieving ASE would be very easy due to very low direct illuminance, which makes it interesting for other people around the world to share any results they get on this.</p>
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<p>I had a question on Alstan's presentation. Is it a LEED requirement or a sensible thing to calculate sDA by compiling the 3 scenarios detailed there. Is this how the calculation is performed in HB as well? By combining shades open/close and ab=0? I must be getting that slide (8) wrong I guess.</p>
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<p>Kind regards,</p>
<p>Theodore.</p> Hi Cheney,
I believe HB has…tag:www.grasshopper3d.com,2016-04-30:2985220:Comment:15194182016-04-30T06:36:35.716ZTheodoros Galanoshttps://www.grasshopper3d.com/profile/TheodorosGalanos
<p>Hi Cheney,</p>
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<p>I believe HB has a rotation study in one of the components but you can replicate that function quite easily in GH.</p>
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<p>If your model is quite simple, and only used for daylighting, you can simply plug in its Brep to a rotate component and connect the output to the Run component. Then you can add a slider or values of the degrees you want it to rotate and use the fly component to run all values off of that. If you have true in your daylighting workflow…</p>
<p>Hi Cheney,</p>
<p></p>
<p>I believe HB has a rotation study in one of the components but you can replicate that function quite easily in GH.</p>
<p></p>
<p>If your model is quite simple, and only used for daylighting, you can simply plug in its Brep to a rotate component and connect the output to the Run component. Then you can add a slider or values of the degrees you want it to rotate and use the fly component to run all values off of that. If you have true in your daylighting workflow that should generate parametric runs for you. Ofc, if I believe you can do the same thing on the North input of the Run components in HB.</p>
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<p>Just remember to link each run to a different file name in the Run daylighting component so you don't overwrite your results each time (a concatanate component to do smth like NameOfSimulation_#Run would be enough).</p>
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<p>There are other, a bit more intricate ways, which actually provide much more functionality and ease of working (once you are more comfortable with GH) if you create the model itself parametrically in GH. Then you just use a similar method to all the parameters that can be influenced.</p>
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<p>Hope this helps.</p>
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<p>Kind regards,<br/>Theodore.</p>