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Why are my openstudio results showing different utility rates than my tariff measure inputs?

asked 2021-03-26 14:15:01 -0500

stanman gravatar image

updated 2021-04-05 09:52:53 -0500

I have been trying to add utility rates to my model to help estimate the operational impacts of different HVAC systems. However, I have noticed that the utility rates in my openstudio results report don't seem to match what my measure inputs say at all. I am using the Tariff Selection-Flat Measure with openstudio V3.1. The most noticeable issue is the fact that I have a fairly large nat gas consumption, and have entered in utility rates for electrical, gas and water, but the nat gas portion of my utility costs in my report is $0.00.

Any and all advice in how to correctly input these utility rates would be greatly appreciated. Thanks in advance!

(Model screenshots attached below)

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@stanman just to confirm, the tariff measure that you are using is the Tariff Selection-Flat measure on BCL?

Aaron Boranian gravatar image Aaron Boranian  ( 2021-03-26 14:38:17 -0500 )edit

Thanks for getting back to me Aaron, and my apologies for the delay. Yes, I am using the Tariff Selection - Flat measure downloaded from the BCL.

stanman gravatar image stanman  ( 2021-03-29 07:05:29 -0500 )edit

@stanman could you add images to your post to show the discrepancy in utility rate between your OpenStudio Results and measure inputs?

Also, is this discrepancy still appearing after running a new simulation with this measure? It will only make a change if you run a new simulation, adding it to the OSM and saving the OSM won't make an impact.

Aaron Boranian gravatar image Aaron Boranian  ( 2021-03-29 10:45:42 -0500 )edit

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answered 2021-03-29 16:54:27 -0500

updated 2021-03-29 17:01:24 -0500

It looks like the measure has not been updated to reflect changes to fuel names in recent versions of EnergyPlus. The measure.rb file has a reference to "Gas:Facility" that should be "NaturalGas:Facility". Try changing that one line of code and see if it helps.

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I filed a bug report about this here.

shorowit gravatar image shorowit  ( 2021-03-29 17:01:00 -0500 )edit

@showrowit took a little fenagling and a few times of saving, closing, reopening and reapplying the measure, but your recommendation seems to have ultimately worked. Thank you very much for your speedy response and assistance, it is greatly appreciated!

stanman gravatar image stanman  ( 2021-03-30 15:53:09 -0500 )edit

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Asked: 2021-03-26 14:15:01 -0500

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Last updated: Mar 29