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openstudio four pipe beam unit

asked 2018-09-12 13:43:20 -0500

xchen's avatar

updated 2018-09-12 15:43:12 -0500

Hi I'm trying to model 4-pipe active beam system in openstudio and notice that there is a fourpipebeam terminal unit type in energyplus but not in openstudio (openstudio has cooledbeam only).

One option is to edit the idf file outside openstudio. But i'm wondering if there's any reason for openstudio to not include fourpipebeam and anything to watch out in the settings in energyplus.

The other option is to use the fourpipeindunit. From the inputs look like the water coil types and the terminal type (and underlying calcs) are different. So any tips or recommendations appreciated.

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answered 2018-09-13 03:23:34 -0500

You're likely just using an outdated OpenStudio version, I added this object circa 2.5.2. (see PR#3031 effectively merged in PR#3136)

Here's what you'll find in the "Library" using OpenStudio 2.6.0:

FourPipeBeam from Library

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yes this is what i'm looking for, thanks.

xchen's avatar xchen  ( 2018-09-13 13:31:43 -0500 )edit

Julien, I'm trying to write a measure to add the four pipe beams to my model. Do I need an updated OsLib_HVAC.rb for this to work? Looks like the latest rb I can find only have chilled beams. Can you give me some directions on this? Like where to find the latest OsLib_HVAC.rb file? And do you know if there's any development on a VAV beam object?

xchen's avatar xchen  ( 2019-02-07 19:11:57 -0500 )edit

I wrote the measure changing the part in the OsLib_HVAC.rb from chilled beam to four pipe active beam, and it works. But when I tried to remove the existing four pipe beam object (airloop.remove) in the model, it doesn't work. The same script works for cooling only beams model. Not sure what's causing this.

xchen's avatar xchen  ( 2019-02-08 11:23:07 -0500 )edit

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Asked: 2018-09-12 13:43:20 -0500

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Last updated: Sep 13 '18