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HVACTemplate:Zone:IdealLoadsAirSystem and ZoneHVAC:IdealLoadsAirSystem, what's the difference?

asked 2017-06-21 08:44:24 -0600

sirYESsir's avatar

updated 2017-06-27 02:42:19 -0600

I need to know the loads that my building is experiencing and I was given a model with an actual HVAC system. The thing is that I need to refurbish the envelope, so I decided to remove the actual HVAC system to put one with ideal loads, so that I would know what new loads I am gonna have with a new envelope. I tried both of them and just the HVACTemplate is working, although I changed all the required objects with the ZoneHVAC with basis on the EnergyPlus example files.

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answered 2017-06-21 11:02:56 -0600

HVACTemplate objects are designed to make it simple to put in HVAC systems. The tradeoff is that you have access to less inputs and therefore less control of how the system is configured and operates.

The HVACTemplate objects actually get "expanded" into a full set of normal IDF objects by a program called ExpandObjects right before the simulation happens. After you run the simulation that includes the HVACTemplates, you should be able to find the "expanded" IDF where the 'HVACTemplate' objects have been replaced with ZoneHVAC objects in the run directory.

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Thank you very much, Aparker.

It's way more simple than what I was to expect. They basically are the same.

And if I understood correctly, the HVACTemplate tradeoff that you mention ceases to exist by simply editing the EXPIDF after the simulation. But well, you'd have to simulate twice...

sirYESsir's avatar sirYESsir  ( 2017-06-21 11:21:05 -0600 )edit

@sirYESsir: if that solved your problem, please mark the answer as accepted, thanks!

Julien Marrec's avatar Julien Marrec  ( 2017-06-27 02:42:08 -0600 )edit

@Julien Marrec: how do I do that? Adding [Solved] to the title would be enough?

sirYESsir's avatar sirYESsir  ( 2017-07-05 00:30:04 -0600 )edit

@sirYESsir, next to the answer you have the upvote/downvote buttons (for answers that were helpful for eg), and below it there's a checkmark that should turn green. Read the help page please, it's explained.

Julien Marrec's avatar Julien Marrec  ( 2017-07-05 02:25:02 -0600 )edit
sirYESsir's avatar sirYESsir  ( 2017-07-05 03:19:52 -0600 )edit

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Asked: 2017-06-21 08:44:24 -0600

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Last updated: Jun 27 '17