# Lenght of Energyplus analysis

**URL:** <https://discourse.ladybug.tools/t/lenght-of-energyplus-analysis/2835>\
**Category:** honeybee-legacy\
**Tags:** energy\
**Created:** [April 17, 2018, 11:34am UTC](https://discourse.ladybug.tools/t/lenght-of-energyplus-analysis/2835 "2018-04-17T11:34:51Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![choteada](https://discourse.ladybug.tools/user_avatar/discourse.ladybug.tools/choteada/32/7111_2.png) [@choteada](https://discourse.ladybug.tools/u/choteada)\
**Post date:** [April 17, 2018, 11:34am UTC](https://discourse.ladybug.tools/t/lenght-of-energyplus-analysis/2835/1 "2018-04-17T11:34:51Z")

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Hello,

I run in strange thing during my Honeybee Energyplus analysis. I have set up script slowly step by step, resulting in a working thing that were able to run my analysis in about 5-7 minutes (for the length of whole year).

Then I slighly adjusted my input geometry (very small differencies from the initial try) and now my analysis will not finish in 40 minutes (longest try I did). If I try to analyze somthing similar to initial try, it is still going very slowly. I am not aware of any changes I would make exept the geometry.

I do realize that my geometry could be kind of difficult to calculate, but what I do not understand is the sudden change of analysis time.[EP\_an\_f.gh](https://discourse.ladybug.tools/uploads/default/original/2X/c/cf7f866b8de9de3ab98740c5b842d0f7ac891693.gh) (659.9 KB)

Would you guys please have any idea what the issue might be or what coul I do to speed up my process of simulation?

Many thanks

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**Author:** ![mostapha](https://discourse.ladybug.tools/user_avatar/discourse.ladybug.tools/mostapha/32/15244_2.png) [@mostapha](https://discourse.ladybug.tools/u/mostapha)\
**Post date:** [April 17, 2018, 8:58pm UTC](https://discourse.ladybug.tools/t/lenght-of-energyplus-analysis/2835/2 "2018-04-17T20:58:26Z")

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Can you share a screenshot of your geometry? Did you introduce non-planar surfaces when you made the changes?

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**Author:** ![devang](https://discourse.ladybug.tools/user_avatar/discourse.ladybug.tools/devang/32/21620_2.png) [@devang](https://discourse.ladybug.tools/u/devang)\
**Post date:** [April 18, 2018, 4:50am UTC](https://discourse.ladybug.tools/t/lenght-of-energyplus-analysis/2835/3 "2018-04-18T04:50:29Z")

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Hi @choteada,  
Please take a look at your zones. One of the them is not closed. Also, you zones have non-convex surfaces. Most of the time goes into solar distribution calculations. If you use minimal shadowing on Honeybee\_Simulation Par component, you can bypass non-convex errors and also the simulation will be finished sooner.

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**Author:** ![choteada](https://discourse.ladybug.tools/user_avatar/discourse.ladybug.tools/choteada/32/7111_2.png) [@choteada](https://discourse.ladybug.tools/u/choteada)\
**Post date:** [April 19, 2018, 2:26pm UTC](https://discourse.ladybug.tools/t/lenght-of-energyplus-analysis/2835/4 "2018-04-19T14:26:48Z")

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Hi,

thank you very much for your replies. I am posting the screen of structure below. Its produced through the honeybee preview. Regarding the shape, yes, it is non-planar surface, as the rooftop shape is based on helix. But I am pretty sure the initial try also contained non-planar surface.

 ![Sn%C3%ADmek%20obrazovky%20(923)](https://discourse.ladybug.tools/uploads/default/original/2X/9/90a510fbd4a531db254a4b7ed1003b48cc1b1b13.png)

Thank you for noticing about the open zone, I had no idea it is there. It was produced by the “Add Glazing by ratio” component for some reason, so I tried to bypass the component, but i makes no difference. The “simulation Par” component also did not make a big difference. so I suppose the problem is in geometry. Unfortunatelly, due to the nature of project, I can not get rid of non planar surface. Do you please know about a way to easily simplify the non planar surface for the sake of analysis?

thank you guys for helping me

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**Author:** ![choteada](https://discourse.ladybug.tools/user_avatar/discourse.ladybug.tools/choteada/32/7111_2.png) [@choteada](https://discourse.ladybug.tools/u/choteada)\
**Post date:** [April 19, 2018, 2:32pm UTC](https://discourse.ladybug.tools/t/lenght-of-energyplus-analysis/2835/5 "2018-04-19T14:32:23Z")

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By the way, I also noticed it takes quite a while to calculate “interzonal windows”. I do not not what exactly does that mean, as I have no widows between the interior parts, just regular ones between interior and exterior.

Is that also related to non-convex or non-planar srufaces?