Radiation Results - LB & HB

Hi,

I've been preparing this discussion for some time now.

I was in doubt if continue this discussion or start a new one. So here we are: a new one.

There are 2 issues that are bothering me with the radiation results, specially when comparing the results from LB with those of HB.

Issue 1: Results so different.

In the attached file upper part to the right of the canvas you see both definitions (LB and HB). The images obtained show results so different that i can't find a logic explanation (2.46 vs 41 kWh/m2 for the same period of time). I believe that LB are in the OK range. HB are to high for just 5 hrs of calculation. I don't believe the material definition are making such a big difference (though i tried to have them similar).

Issue 2: Can't get annual grid based calculations plotted.

In the attached, right side at the bottom. I get the calculation, but after connecting the results to the HB_readAllTheDSHourlyResults it takes ages to calculate and at the end rhino crashes. Can be that this is a memory problem? Or there is a way to make this work (total annual radiation for GridBased simulation)? For now i disabled the component, but i just wonder ...

Words of wisdom for both issues will be appreciated.

Thanks,

-A.

Attachments:

05_SunlightHourAnalysis_CrossTower-V0_Honeybee_Done_01.gh, 630 KB

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Replies to This Discussion

Permalink Reply by Claudio on October 8, 2015 at 6:11am

Hi Abraham interesting topic. I used to get different results from HB vs LB.but I always thought it was me doing something wrong. I can't look at your definition right now, I'm on my phone. I'll be watching this post closely
Thank you cheers

Permalink Reply by Abraham Yezioro on October 8, 2015 at 6:33am

I hope i'm doing something wrong. The alternative is much less desirable ...

Another thing i've noticed. In the file i attached, when i send only one hour in HB (say from 10 to 11) the radiation image is black, like nothing is in there. It required at least 2 hours.

-A.

Permalink Reply by Mostapha Sadeghipour Roudsari on October 8, 2015 at 11:06am

Hi Abraham. I will check your file as soon as I can. Back to part 1 I assume that you're already using a climate-based sky? Otherwise it's expected.

Permalink Reply by Abraham Yezioro on October 8, 2015 at 11:23am

Hmmmm ...

I'm using HB_genCumSky.

The reason is that i want to get the whole year radiation (or any other desired analysis period). The hint for this sky says to use it ONLY for radiation analysis, since it is using the Gencumulativesky.

The HB_genClimateBasedSky asks for specific month/day/hour.

I'm getting the feeling that, in effect, i'm doing something wrong ...

-A.

Permalink Reply by Mostapha Sadeghipour Roudsari on October 8, 2015 at 1:57pm

You're probably doing it right. I guess the difference is coming from gencumulative sky vs gendaymtx. I know that gendaylit (climate-based sky) and gendaymtx match for hourly tests that I have done.

Permalink Reply by Claudio on October 8, 2015 at 6:22pm

Hmmm is it me or this discussion started by Abraham got hijacked.

Robert please dont take this badly but I think you should start your own discussion topic aside from this one. Maybe is too late now but I think is fair enough to say that.

Back to Abraham discussion. It is interesting to know that there is a difference in the gendaymtx vs gendaylit returns different results. I'm still not able to see the definition but I will when I get back home..traveling right now so I'm n my phone

cheers

Permalink Reply by Mostapha Sadeghipour Roudsari on October 8, 2015 at 6:26pm

Hi Claudio. Don't worry. I'm checking the file right now and will have a definite answer soon. That was my hypothesis. Let me check and I will update the discussion.

Permalink Reply by Robert Narracci on October 8, 2015 at 6:39pm

Claudio,

I'm not trying to "hijack" anything. Yesterday I posted an issue about radiation calcs and Abraham invited me to a thread he was opening because he thought my issue was germaine. If i jumped on the wrong thread sorry but serious? "hijack"?

Permalink Reply by Claudio on October 8, 2015 at 6:52pm

Yeah you are right Robert. No Hijack then, My sincere public apologies

cheers

Permalink Reply by Robert Narracci on October 8, 2015 at 6:53pm

all cool bro!

Permalink Reply by Abraham Yezioro on October 8, 2015 at 9:46pm

Hmmm #2.

Just to be sure about the status of this thread.

Regarding question 1: The definition is fine and the problem comes from gencumulativesky? I see in the DIVAsite that they show "proudly" the radiation renders. I assume they are doing right ... should i? Just can't get so far where is the "leak" in this one.

As for question 2: any recommendations?

Thanks,

-A.

P.S. Just now i see Mostapha's answer from 3 hours ago that he is checking. So sorry for writing this "in the middle" of this process.

Permalink Reply by Robert Narracci on October 9, 2015 at 6:16am

any way I can move my stuff into a new thread?