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OpenStudio Results - Exterior Lighting correct?

asked 2016-04-28 07:39:34 -0500

Matt Koch
1998 ●2 ●17

updated 2016-04-28 09:19:25 -0500

flag of United States of America

10077 ●18 ●25 https://www.nrel.gov/b...

Hi,

I am using the Exterior Equipment in the Facility Tab to specify exterior lighting at 6,698 W. It is running 12 hours a day 365 days a year so uses approximately 2,444.8 kWh/month or 29,337.2 kWh/y. Yet, OpenStudio Results Exterior Lighting is reporting this as 29.34 kWh (presumably per year - there really should be an "Annual" annotation if that is so). Am I misinterpreting this number - is it referring to some period other than a year?

Thanks,

Matt

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Note that the annual exterior lighting consumption can also be found in the OpenStudio report under Monthly Overview and then expanding the "Electricity Consumption (kWh) - view table". Exterior Lighting will be a row in that table with an annual (as well as monthly) values.

shorowit ( 2016-05-13 18:07:52 -0500 )edit

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answered 2016-04-28 09:13:02 -0500

flag of United States of America

10077 ●18 ●25 https://www.nrel.gov/b...

updated 2016-04-28 09:53:14 -0500

The OpenStudio Results are produced by a measure that gets values from the EnergyPlus results, so check the Lighting Summary report there for the real values.

It looks like the measure is incorrectly doing a conversion here, which may be happening if you're converting the results to IP units.

FYI @David Goldwasser

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Good catch, I'll fix both the unit conversion and extend the label to specify consumption as annual. https://github.com/NREL/OpenStudio/is...

David Goldwasser ( 2016-04-28 09:41:27 -0500 )edit

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Asked: 2016-04-28 07:39:34 -0500

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Last updated: Apr 28 '16

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