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EnergyPlus Unmet Hours - Controllers?

asked 2016-09-27 00:24:38 -0500

updated 2017-05-17 12:19:44 -0500

All; I seem to be running into an issue with a VAV (Dx/Gas) system with Elec Reheat FPB's and HeatRecovery where I am not meeting setpoint in a large number of zones on a system. Am I missing some DAT controller? OR is there such in E+? I do have a warmest DAT reset with a 5F reset, but this doesnt seem to resolve the issue. So - in short - what controllers should i ahve on a non-unitary (airloop?) system for this? I have OA controllers, but when I try to add other setpointmanagers to the system, errors results.....ideas?

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Bit of a clarification - When the system is Hydronic and not Dx/Gas there are controller:wtercoils controllers which control the coils (yes?). And the system performs as expected / low unmet hours. but with Dx/Gas the system appears confused of how to control the coils, or DAT, or mode of operation (heating / Cooling). So, really my question is: "Is there a comprable control or some other object/thing / input I am missing on a Dx/gas vav system?

dradair gravatar imagedradair ( 2016-09-27 06:31:26 -0500 )edit

The DX coil cannot just sit on the airloop, which kind of wrapper are you using with the DX coil, unitary or coil system?

Archmage gravatar imageArchmage ( 2016-09-27 08:14:27 -0500 )edit

Its part of a Coil System. Not unitary. And Ive got a SetpointManager:MixedAir tied to the cooling coil....(i think). as well as a SetpointManager:Warmest to DAT reset. It is permissible/required to have both the SetpointManager:Warmest as well as a SetpointManager:Scheduled for the coil? Wouldn't these conflict?

dradair gravatar imagedradair ( 2016-09-27 08:27:58 -0500 )edit

Through looks like neither my cooling coil or any of my reheat coils are turning on....?....availability manager?

dradair gravatar imagedradair ( 2016-09-27 08:40:19 -0500 )edit

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answered 2016-09-27 10:23:29 -0500

answering own question (taboo?) but want to leave it for others:

Project has series FPB w/ Elec RH, which requires a AirLoopHVAC:ZoneMixerobject....mine did not have the recirculation node from the zone listed - but it was listed in the AirTerminal:SingleDuct:SeriesPIU:Reheat....mildly surprised E+ let this run. But configuring this properly engages both the Zone RH& fans and the central fan/coils.

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Asked: 2016-09-27 00:24:38 -0500

Seen: 198 times

Last updated: Sep 27 '16