Issue with analysis period

Replies to This Discussion

Permalink Reply by Abraham Yezioro on November 27, 2015 at 11:38am

Mahdye,

The "error" was that you connected the created zone with the HB_Mass2Zone. This was cancelling the windows definitions and starting the zone creation from the beginning. There is no need, in your case for such connection. See attached.

Didn't run it but i'm pretty sure you'll see now the differences.

Also updated the file to the latest version.

-A.

Attachments:

• SWtest_AY.gh, 654 KB

Permalink Reply by mahr on November 27, 2015 at 7:16pm

Thanks Abraham... I updated my HB & LB to the last version, but i get this error for running energy simulation: 1. Solution exception:global name 'HBGenerators_' is not defined as picture

I followed the discussion "http://www.grasshopper3d.com/group/ladybug/forum/topics/1-solution-exception-global-name-hbgenerators-is-not-defined" but couldn't fix my problem.

Attachments:

• SW test 1.gh, 935 KB

Permalink Reply by Abraham Yezioro on November 27, 2015 at 9:57pm

Here you go.

You just needed to reinsert this component as it changed the number of inputs. I reinserted also the 3dChart.

-A.

Attachments:

• SWtest1_AY.gh, 638 KB

Permalink Reply by mahr on November 28, 2015 at 8:02am

Thanks one again Abraham... I reinserted all the components, but don't know why it didn't solve the problem.. now with the attachment you sent it's ok :)

As my first problem i still have the same results for both whole year and period analysis 8-15 hrs. i canceled HB_Mass2Zone component, but no change!

Permalink Reply by Abraham Yezioro on November 28, 2015 at 8:38am

I see that the zone program you set is OfficeBreakRoom. Being that i suppose there is no difference running the whole year hours or just 8 to 15. Those are probably the occupancy hours. Makes more sense to run just a few months than just some hours,

-A.

Permalink Reply by Chris Mackey on December 3, 2015 at 11:11am

Mahr,

You only need to reinsert components if the inputs/outputs have changed in the updated version of the component.

For your analysis period question: EnergyPlus is not capable of modeling simulations that are shorter than a day.  Therefore, the "hour" inputs on the analysisPeriod component do not have any effect on the Energy simulation component.  The deeper reason for this is that the temperature and energy use during a given hour are dependent upon the temperature and energy use of the previous hours.  So it is not accurate to run a simulation for the analysis period that you have set. 

If you want to get data for just your occupied period in Grasshopper, you only need to post-process the results with the "Average Data" component:

-Chris

Attachments:

• SWtest1_AY_CWM.gh, 640 KB

Permalink Reply by mahr on December 3, 2015 at 4:20pm

Thanks Chris

It was so usefull.