You must be using a different file, this warning does not show up with this file. I did not look to see why reheat energy is high in summer, I would look at adjusting the supply air temperature higher so the reheat coils do not need to operate as much. I do see that the terminal units have a 1 as the minimum constant flow (see the *.expidf file) and this might mean that the VAV dampers are not closing as they should.
AirTerminal:SingleDuct:VAV:Reheat,
perim1 VAV Reheat, !- Name
HVACTemplate-Always 1, !- Availability Schedule Name
perim1 Damper Outlet, !- Damper Air Outlet Node Name
perim1 Zone Equip Inlet, !- Air Inlet Node Name
autosize, !- Maximum air flow rate {m3/s}
Constant, !- Zone Minimum Air Flow Input Method
1, !- Constant Minimum Air Flow Fraction
On 10/15/2010 10:58 AM, Langdon Alger wrote:
Hi James,
Thank you for the reply.
I have transitioned the file to v5. However I still find that I am getting the same problem as before.
I have attached to updated idf file.
--- On Fri, 10/15/10, James V Dirkes II, PE <jim@xxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
From: James V Dirkes II, PE <jim@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
Subject: RE: [EnergyPlus_Support] Large Reheat Consumption During Summer
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Received: Friday, October 15, 2010, 9:34 AM
Dear Langdon.
The text “AHU HEATING COIL CONTROLLER” does not appear in your IDF, so I can’t figure out what is referred to by the error. In addition, the IDF is difficult to read because of the many interspersed comments.
I recommend that you begin using the newest version, so it can be opened by the IDF Editor. Transition of your IDF to the current version is almost a one click affair!
The Building Performance Team
James V. Dirkes II, P.E., LEED AP
1631 Acacia Drive NW
Grand Rapids, MI 49504
616 450 8653
From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Langdon Alger
Sent: Friday, October 15, 2010 8:58 AM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] Large Reheat Consumption During Summer
Hello,
I am running multiple simulations using various building configurations and I have run into the problem in my results which I can't determine the cause for.
I get low natural gas consumption in the winter months and high consumption during the summer due to the reheat system. I am using an old version of EnergyPlus which I hope is not a problem.
I do get a Severe error in my simulations which occurs multiple times:
Severe ** Controller error for controller = AHU HEATING COIL CONTROLLER
** ~~~ ** Occurrence info=EDMONTON STONY PLAIN AB CAN WYEC2-B-25145 WMO#=711230, 08/06 04:02 - 04:03
** ~~~ ** Controller function is inconsistent with user specified controller action = "" action
** ~~~ ** Actuator will be set to minimum action
** ~~~ ** Note: Chilled water coils should be reverse action and the entering chilled
** ~~~ ** water temperature should be below the setpoint
** ~~~ ** Note: Hot water coils should be normal action and the entering hot
** ~~~ ** water temperature should be above the setpoint
I have attached the simulation file I am working with and the weather file.
Thank you for your help.
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