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[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@xxxxxxxxxxxxxxx <EnergyPlus_Support@xxxxxxxxxxxxxxx> on behalf of 'Jones, Christopher' christopher.r.jones@xxxxxxx [EnergyPlus_Support] <EnergyPlus_Support@xxxxxxxxxxxxxxx>
Sent: 03 December 2017 19:35
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
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

 

T +1 416-644-0252

 

2300 Yonge Street, Suite 2300

Toronto, ON M4P 1E4 Canada

wsp.com

 

 

Please consider the environment before printing...

 

 





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Posted by: Annie Marston <anniemarston@xxxxxxxxxxx>


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