Question-and-Answer Resource for the Building Energy Modeling Community
Get started with the Help page
Ask Your Question

Open Studio 2.9.1 Plug Load Multiplier Errror

asked 2020-09-30 15:46:28 -0500

mikemorris's avatar


I cannot figure out why my simulation results are applying my plug load multiplier twice. There is a similar post i found that seemed to address this but it all came down to the load definition already including the multiplier, I am sure that is not the case for mine. I'm applying fitness equipment to a gym space and have treadmills, ellipticals, and stationary bikes. So I created one definition for each and then in the space I put that definition and applied the multiplier on the space load. In my reporting it multiplies twice.

image description

image description

image description

edit retag flag offensive close merge delete


Just to be clear, you want to have 26 treadmills x 650 W/treadmills in your zone, you are afraid you are getting 26 x 26 treadmills x 650 W/treadmills?

macumber's avatar macumber  ( 2020-09-30 22:25:41 -0500 )edit

That is exactly what is happening. And it happened in all the spaces where I put elec equip with multipliers.

mikemorris's avatar mikemorris  ( 2020-10-01 08:50:44 -0500 )edit

1 Answer

Sort by ยป oldest newest most voted

answered 2020-10-01 02:04:14 -0500

updated 2020-10-01 02:04:49 -0500

@mikemorris thanks for pointing that out. I looked at the code, and non-default multipliers were not handled on that table for plug loads per area, per person or design level. Below is a link to fix that I'll push to BCL once OpenStudio 3.1 is released. I did inspect the space lighting detail table, and it didn't have the same issue.

Just to clarify a bit. I believe that your simulations were correct, and that this was just an issue with that table. The load column was giving the instance load, which included the multiplier, when it should have been giving the definition load level.

edit flag offensive delete link more


Thanks @davidgoldwasser. I appreciate the clarification as well. I am having to work in 2.9.1 for now because of some Austin Energy measures that to my knowledge are not available in OS 3.0+ yet. So if the simulation is correct and just not the output table I'll be able to work with that.

mikemorris's avatar mikemorris  ( 2020-10-01 12:03:12 -0500 )edit

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.

Add Answer

Training Workshops

Question Tools

1 follower


Asked: 2020-09-30 15:46:28 -0500

Seen: 136 times

Last updated: Oct 01 '20