Good tip Jim, I think I am going to start doing that with the exhaust fans! (also hello)
Christopher, as I am avoiding work this afternoon, if you send me your two idf files I can see if i can do a quick merge for you (I really am avoiding work but also going to make mince pies so one will win out, file merging or mince pie making it all depends on how quickly I can get them)
Sent: 06 December 2017 13:47
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: Re: [EnergyPlus_Support] Re: EnergyPlus - DOAS, radiant infloor heating and PTAC
oh you can trick it (i think), just hardwire the cooling capacity to zero in the underfloor heating component, that should work, then put the water flow rate to zero (if the simulation will allow that to run) that way you don't have to do any removing.
From: EnergyPlus_Support@yahoogroups.com <EnergyPlus_Support@yahoogroups.com > on behalf of 'Jones, Christopher' christopher.r.jones@xxxxxxx [EnergyPlus_Support] <EnergyPlus_Support@yahoogroups.com >
Sent: 04 December 2017 22:00
To: EnergyPlus_Support@yahoogroups.com
Subject: [EnergyPlus_Support] RE: EnergyPlus - DOAS, radiant infloor heating and PTACThank you very much. I am not so worried about adding the PTACs – cooling only but I am worried about removing the underfloor radiant cooling – chiller, loop, branches, coils, splitters, etc. The “merged” system would be DOAS Underfloor heating and PTAC cooling.
Christopher R. Jones, P.Eng.
Technical Specialist
Sustainability & Energy
Please consider the environment before printing...
From: EnergyPlus_Support@
yahoogroups.com [mailto:EnergyPlus_Support@yahoogroups.com ]
Sent: Monday, December 04, 2017 2:27 PM
To: EnergyPlus_Support@yahoogroups.com
Subject: [EnergyPlus_Support] Re: EnergyPlus - DOAS, radiant infloor heating and PTAC
As a pointer for you, the PTAC system is a zone system so I would use the DOAS with radiant floor as your base file and add in the PTAC (also radiant floor files have all sorts of extras in them to do with surfaces and all sorts so this really should be your base file). You can add it in directly, just make sure you take all the components associated with the PTAC. ALL the components, that is the PTAC, the hot and cold coils, the fans, the branches, the outdoor air mixer, outdoor air equipment list, go all the way down and make sure you pick up everything
The gotchas will be at Equipment list and equipment connections. You can only have one equipment list and one equipment connections per zone.
Equipment List: You will have to add PTACs to your existing equipment lists.
Equipment Connections: you need add the exhaust node you have in the PTAC file to the existing equipment connections for the correct zones. You will need to make a nodelist (a separate object) for each zone that has a PTAC and a DOAS connection and in this list put the two node names that are in the inlet node in the equipment connection objects. Then add this new nodelist name to your node connections
Depending on whether the PTAC has hot and cold water coils means you will need to add these onto the branchlist, the splitter and the connector (essentially adding them into the chiller and boiler loops)
And that should do it. Happy to help some more if you get stuck
Annie
From: EnergyPlus_Support@
yahoogroups.com <EnergyPlus_Support@yahoogroups.com > on behalf of 'Jones, Christopher' christopher.r.jones@xxxxxxx [EnergyPlus_Support] <EnergyPlus_Support@yahoogroups.com >
Sent: 03 December 2017 19:35
To: EnergyPlus_Support@yahoogroups.com
Subject: [EnergyPlus_Support] EnergyPlus - DOAS, radiant infloor heating and PTAC
Hello,
I am looking for an example .idf – DOAS, radiant infloor heating and packaged terminal air conditioners.
I have two models of my small building:
DOAS – radiant infloor heating and cooling
DOAS – PTAC with supplemental hydronic heating.
I would like to “merge” these two files to end up with DOAS –radiant infloor heating and PTAC. It seems to me like that could be a lot of “gotchas” trying to revise the two files – I have next to no experience editing EnergyPlus file directly.
Any pointers? Anyone feel like looking at my two .idf files in order to offer hints?
Christopher R. Jones, P.Eng.
Technical Specialist
Sustainability & Energy
Please consider the environment before printing...
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