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Setting 'use' and 'source' sides of WaterHeater:Mixed

asked 2015-09-17 05:32:42 -0500

updated 2016-04-23 17:57:01 -0500

I want to use a WaterHeater:Mixed as a DHW storage tank. I need to be able to put this object on the demand side of my boiler loop, and on the supply side of my DHW.

Is it doable in OpenStudio App aside from using a measure?

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I don't see a way to do this know but can follow up with @Kyle Benne to see if there is any reason we can't add this.

David Goldwasser gravatar image David Goldwasser  ( 2015-09-17 09:11:49 -0500 )edit

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answered 2015-09-17 10:07:48 -0500

updated 2015-09-18 10:20:50 -0500

Here's how to do it in the meantime in case anyone has an urgent matter:

  • Create a boiler plant loop with the boiler on the supply side and the WaterHeater:Mixed (called tank) on the demand side
  • Create a secondary loop, where we want to put the tank on the supply side. Let's call this DHW Plant Loop

Once your model is loaded

# Get storage tank
tank = model.getWaterHeaterMixedByName('Storage Tank').get

# Get Secondary loop
dhw_loop = model.getPlantLoopByName('DHW Plant Loop').get

# Add the tank on the supply side of the secondary loop
dhw_loop.addSupplyBranchForComponent(tank)

Then save your model, and when you reopen it the tank will be properly connected.

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Edit

Here is a link to a measure on BCL that creates a WaterHeater:Mixed and sets the source and use sides.

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answered 2015-09-17 09:52:35 -0500

FYI - filed an issue for this. If not fixed for 1.9.0 should be fixed soon after https://github.com/NREL/OpenStudio/is...

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Issue should be fixed for 1.9.0

macumber gravatar image macumber  ( 2015-09-17 16:12:54 -0500 )edit

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Asked: 2015-09-17 05:32:42 -0500

Seen: 140 times

Last updated: Sep 18 '15