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Best way to modify the geometry input files for openstudio-standards?

asked 2019-08-23 14:59:53 -0600

davidwabel gravatar image

updated 2019-08-29 12:56:20 -0600

Hello All -

I'm attempting to add some flexibility to the create_doe_prototype_building measure. I would like to be able to control the geometry, i.e. shape, sqft, floors, aspect ratio, etc... while still generating a prototype building programmatically. It appeared to me the best way to do this might be to create a new geometry.osm file and using an instance variable, have the prototype building measure instead grab this new model for the geometry. However, I'm having a really hard time making this generic enough to match the new spaces, zones, and space types to their current names - which then creates problems later on in the model generation. This leads to a few questions - Are there any functions/scripts that were used to create the initial geometry files that may help? What is the naming convention across building types and templates? And would changing the number of floors and adding new spaces/zones cause errors if the convention is followed?

Thanks in advance!!!

David

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answered 2019-08-23 15:20:43 -0600

updated 2019-08-23 15:35:09 -0600

@davidwabel we have been working on a new "Create Typical Building from Model" measure for internal analysis projects. We paired it with a measure to create simplified geometry representing different aspect ratios, number of stories, and building type mixes. The idea of the "Create Typical" measure is to take any user supplied geometry tagged with recognized space types, and create a full energy model, including HVAC. It has similarities to the "Create DOE Prototype Building", "Create Baseline Building", and "Space Type and Construction Set Wizard" measures but it is unique.

We hope to have both measures up on BCL soon with some basic documentation. They will still be actively developed measures that will continue to improve and grow in functionality over time. I'll also give a short presentation on them at the ASHRAE Building Performance Analysis Conference next month in Denver.

Working with this new measure will be a much better path then trying to get the Prototype measure to work with customized geometry.

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Thanks @david-goldwasser! That sounds perfect - your presentation would be extremely relevant. For the meantime, would it be reasonable to use the methods here (https://unmethours.com/question/3566/...) or the Geometry.scale_model function to at least change the sqft of prototype buildings +/- 50% or so?

davidwabel gravatar image davidwabel  ( 2019-08-23 15:44:36 -0600 )edit

If you do use that approach be aware some model characteristics that are not described per area won't behave. Some examples include elevator loads, SWH, and exterior lighting. Just for reference, when I mention the measures should be on BCL soon, hopefully that is early October.

David Goldwasser gravatar image David Goldwasser  ( 2019-08-25 00:49:11 -0600 )edit

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Asked: 2019-08-23 14:59:53 -0600

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Last updated: Aug 23 '19