For 2) Because the zone is over cooled. The damper shuts down until the reheat kicks in. I have not look at the VAV for some time. If the set point manager were not set up properly, the reheat heater may not use the cooling theremostat setting.
This is just an observation. I have not been active lately and I am not sure whether this has been corrected. For my application I simmply ignore the ASHRAE guideline and set the ref. supply air temperature to a value in the dead band for both cooling and heating.
Dr. Li
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
From: RRaustad@xxxxxxxxxxxx
Date: Wed, 30 Jan 2013 21:09:38 -0500
Subject: RE: [EnergyPlus_Support] VRF question
1. Just like any other system type, if there is no load, the system
would be off (0).
2. This does not make sense. The load would not be getting smaller if
the zone setpoint is not met.
On Wed, 30 Jan 2013 16:29:03 +0000 erydjunaedy
ery.mailinglist@xxxxxxxxx> wrote:
> Folks,
>
> 1. Is there a reason why the VRF operating mode becomes zero (=OFF)? Should it
> not be always cooling or heating (1 or 2)?
>
> 2. Is there a limit to the coil output? I found a case where the coil output
> is getting lower and lower causing unmet setpoint. The lowering of coil output
> coincides with the lowering of zone heating load.
>
> Thanks,
>
> Ery
>
> ------------------------------------
>
> Primary EnergyPlus support is found at:
> http://energyplus.helpserve.com or send a message to
> energyplus-support@xxxxxxxx
>
> The primary EnergyPlus web site is found at:
> http://www.energyplus.gov
>
> The group web site is:
> http://groups.yahoo.com/group/EnergyPlus_Support/
>
> Attachments are currently allowed but be mindful that not everyone has a high
> speed connection. Limit attachments to small files.
>
> EnergyPlus Documentation is searchable. Open EPlusMainMenu.pdf under the
> Documentation link and press the "search" button.
> Yahoo! Groups Links
>
>
>
would be off (0).
2. This does not make sense. The load would not be getting smaller if
the zone setpoint is not met.
On Wed, 30 Jan 2013 16:29:03 +0000 erydjunaedy
ery.mailinglist@xxxxxxxxx> wrote:
> Folks,
>
> 1. Is there a reason why the VRF operating mode becomes zero (=OFF)? Should it
> not be always cooling or heating (1 or 2)?
>
> 2. Is there a limit to the coil output? I found a case where the coil output
> is getting lower and lower causing unmet setpoint. The lowering of coil output
> coincides with the lowering of zone heating load.
>
> Thanks,
>
> Ery
>
> ------------------------------------
>
> Primary EnergyPlus support is found at:
> http://energyplus.helpserve.com or send a message to
> energyplus-support@xxxxxxxx
>
> The primary EnergyPlus web site is found at:
> http://www.energyplus.gov
>
> The group web site is:
> http://groups.yahoo.com/group/EnergyPlus_Support/
>
> Attachments are currently allowed but be mindful that not everyone has a high
> speed connection. Limit attachments to small files.
>
> EnergyPlus Documentation is searchable. Open EPlusMainMenu.pdf under the
> Documentation link and press the "search" button.
> Yahoo! Groups Links
>
>
>
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Primary EnergyPlus support is found at:
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The primary EnergyPlus web site is found at:
http://www.energyplus.gov
The group web site is:
http://groups.yahoo.com/group/EnergyPlus_Support/
Attachments are currently allowed but be mindful that not everyone has a high speed connection. Limit attachments to small files.
EnergyPlus Documentation is searchable. Open EPlusMainMenu.pdf under the Documentation link and press the "search" button.
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