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How to make a model with cogeneration in OpenStudio?

asked 2015-10-27 10:25:06 -0500

Dubravka's avatar

I am trying to make an energy model of existing building and one of the tasks is to look up at cogeneration as an alternative solution. It would be a simple model with internal combustion engine (natural gas as a fuel). I saw option for results about cogeneration in the "Report: Energy meters" and I was wondering is there a way to do such model in OpenStudio and how?

Thank you

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answered 2015-10-27 10:59:43 -0500

If you know how to write this in an IDF file, you an can drop that text into an EnergyPlus measure and use it with OpenStudio. Currently OpenStudio support power generation with photovoltaic, but not through other methods.

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I don't see PV in the GUI? Is it available in the API only?

Julien Marrec's avatar Julien Marrec  ( 2015-10-27 12:31:43 -0500 )edit

I should have clarified, It wasn't added until 1.9.1. Dan added a user script in the plugin and it will render as purple grid if surface is assigned as PV, but doesn't show in OpenStudio GUI, except for in the standard report. I'm also working on a measure to put on BCL. Maybe I'll try to post quick video next weekend. I also want to post something on ZoneMixing and ZoneVentilationDesignFlowRate (which are both API only).

David Goldwasser's avatar David Goldwasser  ( 2015-10-27 12:54:46 -0500 )edit

Thank you, I saw a possibility to write it in IDF file but I didn't know how to use it with OpenStudio.

Dubravka's avatar Dubravka  ( 2015-10-28 02:52:51 -0500 )edit

The PV measure in 1.9.2 doesn't work, it's missing a critical object: ElectricalLoadCenter:Generators. I've opened an issue here

Julien Marrec's avatar Julien Marrec  ( 2015-10-29 05:22:13 -0500 )edit

@Julien Marrec, I assume you are referring to the user script in the SketchUp plugin? I haven't posted the OpenStudio based PV measure on BCL. There is an old EnergyPlus PV measure.

@macumber can confirm this but I think this gets generated for you on forward translation to IDF. I confirmed that I don't have this object in my OSM file but it is in the IDF from an earlier run, in which I dod confirm PV production.

David Goldwasser's avatar David Goldwasser  ( 2015-10-29 09:56:29 -0500 )edit

@Dubravka I'll post a measure soon that will take an argument for you to point to an IDF file, and it will just drop it in for you. This won't work in cases where you need to remove or alter IDF objects generated by OpenStudio forward translation. But for simple cases where you just want to add in had made IDF objects, it will work.

David Goldwasser's avatar David Goldwasser  ( 2015-10-29 09:58:55 -0500 )edit

@David Goldwasser is right that object is not included in the OpenStudio model, it is generated on translation to IDF.

macumber's avatar macumber  ( 2015-10-29 23:52:08 -0500 )edit

@David Goldwasser Thank you, I am looking forward to your post.

Dubravka's avatar Dubravka  ( 2015-11-02 13:29:15 -0500 )edit

@David Goldwasser Can I look forward to some announcement about the measure that will take an argument to point to an IDF file and just drop it in?

Dubravka's avatar Dubravka  ( 2015-12-18 09:51:09 -0500 )edit

@Dubravka thanks for the reminder on this, I'll try to have it by Monday.

David Goldwasser's avatar David Goldwasser  ( 2015-12-18 10:14:25 -0500 )edit

@David Goldwasser Thank you very much, I'm really looking forward!

Dubravka's avatar Dubravka  ( 2015-12-18 10:32:27 -0500 )edit

Just posted Inject IDF Measure to BCL. You should be able to see it from the OpenStudio application. When you browse it using "Find BCL Measure" Look under "Whole Building/Space Types". It can be used for any type of object but I have to place it somewhere in the taxonomy. You may have to advance to page new to see this measure, newest measures are listed last.

The measure pretty much works as if you did a copy and paste into the IDF file prior to passing the IDF to EnergyPlus.

David Goldwasser's avatar David Goldwasser  ( 2015-12-21 13:47:33 -0500 )edit
Dubravka's avatar Dubravka  ( 2015-12-22 06:50:10 -0500 )edit

@David Goldwasser Hello! I’ve been using measure ‘Inject idf objects’ and I have a problem. When I use idf files made in EnergyPlus measure works fine, but when I want to use idf file made from osm file it seems that measure just ignore that file. Am I making some mistake or measure can work only with idf made directly in EnergyPlus? Thank you in advance.

Dubravka's avatar Dubravka  ( 2016-01-12 06:40:19 -0500 )edit

@David Goldwasser I have found mistakes in my file. Sorry for disturbing.

Dubravka's avatar Dubravka  ( 2016-01-13 06:04:16 -0500 )edit

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Asked: 2015-10-27 10:25:06 -0500

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Last updated: Oct 27 '15