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

Question about the relation between Number of people and multipliers

asked 2023-06-25 12:05:03 -0500

Neon_Demiurge's avatar

So in my model I want to have 4 "people", in the loads tab, in peoples definitions, when I create a people load I have a space named "Number of people", so for example I create a definition for the "master bedroom"image description

Now in the "Space types" tab, under the "Loads" sub-tab, should I set the multiplier on 2 or should I leave it on 1?image description

edit retag flag offensive close merge delete

1 Answer

Sort by ยป oldest newest most voted

answered 2023-06-25 15:37:36 -0500

updated 2023-06-25 16:02:29 -0500

That would give you a max of 4x people in "Master bedroom 1".

Think of OpenStudio's PeopleDefinition as a resource one would reference multiple times within the same model, carry over to the next model, etc. It is rare to encounter more than one PeopleDefinition in a given model when relying on the Number of People field. Holding multiple PeopleDefinitions makes more sense when People are instead calculated from dissimilar occupancy densities (e.g. code compliance). ActivitySchedules are the preferred way to adjust metabolic rates in a model (e.g. basketball players vs spectators, daycare workers vs toddlers). A Space or SpaceType can hold multiple instances of People (kids vs parents), while still referencing a single PeopleDefinition. For instance, if one wanted to distinguish 2x children from both parents, a model of a house could hold:

  • 1x PeopleDefinition, where the Number of People is set at "1"
  • e.g. 1x, 2x or 3x (it depends) People object(s) per space, where each multiplier equals the max number of expected kids and/or parents in that space, with potentially unique occupancy and activity schedules for each.

Ensure occupancy schedules are harmonized between spaces, so the overall number of kids in the house doesn't magically switch from 2x to 6x for an hour or two. Keep in mind uncertainty in short term occupancy/mobility patterns is usually significant. The end goal (e.g. code compliance vs research) is key in determining the required level of detail. Hope this helps.

edit flag offensive delete link more



thank you for the explanation

Neon_Demiurge's avatar Neon_Demiurge  ( 2023-06-26 03:55:49 -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: 2023-06-25 12:05:03 -0500

Seen: 452 times

Last updated: Jun 26 '23