[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [EnergyPlus_Support] Constant Volume AHU
If there is on-off control in the AHU, then the supply air temperature
will not be fixed. If the fan cycled with the compressor, then the
supply air temperature would be relatively fixed, but would still
fluctuate based on inlet conditions and outdoor temperature. A very
simple way to achieve your goal would be to use Compact
HVAC:Zone:Unitary and Compact HVAC:System:Unitary objects. See the
documentation for these objects for further information.
Filipe madureira wrote:
>
> Hello All,
>
> I’m trying to simulate a Constant Volume Air Handling Unit to control
> temperature in a single zone. The real AHU has a cooling coil and an
> heating
> coil without terminal reheat.
>
> The air set-point temperature of the cooling coil is 16ºC and the air
> set-point temperature of the heating coil is 22ºC. The zone heating
> set-point is 20ºC and the cooling set-point is 25ºC.
>
> The return air is mixed with outside air (25 % of total AHU flow rate).
>
> The type of control in the coils is on-off: If there is zone load to meet,
> the supply air is provided at a temperature of 16 ºC or 22ºC depending if
> we are cooling or heating. If there isn’t zone load to meet the supply air
> temperature is the mixed air temperature.
>
> I’m not a very experienced energy plus user in what concerns to simulate
> HVAC systems. For what I’ve learned with the example files, the way
> used to
> control zone temperature with constant volume systems is by varying supply
> air temperature, using an AHU with cooling coil and terminal reheat as the
> Air Distribution Equipment.
>
> Is there a way to simulate the AHU which operates in the way I’ve
> described?
>
> Thanks in advance for your help
>
> Best Regards
>
> Filipe Madureira
>
> Tel: +351 919 293 876 | E-mail: filipe.madureira@xxxxxxxxxxxxx
> <mailto:filipe.madureira%40fluidinova.pt>
>
> __________________________________________________________
>
> FluidInova, Engenharia de Fluidos, SA
>
> TECMAIA - Parque de Ciência e Tecnologia da Maia
>
> Rua Engº Frederico Ulrich, nº 2650 | 4470-605 Moreira da Maia | Portugal
>
> Tel: (351) 229 408 265 | Fax: (351) 229 408 266
>
> E-mail: <mailto:geral@xxxxxxxxxxxxx <mailto:geral%40fluidinova.pt>>
> geral@xxxxxxxxxxxxx <mailto:geral%40fluidinova.pt> | Web:
> <http://www.fluidinova.pt/ <http://www.fluidinova.pt/>>
> http://www.fluidinova.pt/ <http://www.fluidinova.pt/>
>
> [Non-text portions of this message have been removed]
>
>
--
Richard A. Raustad
Senior Research Engineer
Florida Solar Energy Center
University of Central Florida
1679 Clearlake Road
Cocoa, FL 32922-5703
Phone: (321) 638-1454
Fax: (321) 638-1439 or 1010
Visit our web site at: http://www.fsec.ucf.edu
UCF - From Promise to Prominence: Celebrating 40 Years
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 not allowed -- please post any files to the appropriate folder in the Files area of the Support Web Site.
EnergyPlus Documentation is searchable. Open EPlusMainMenu.pdf under the Documentation link and press the "search" button.
Yahoo! Groups Links
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/EnergyPlus_Support/
<*> Your email settings:
Individual Email | Traditional
<*> To change settings online go to:
http://groups.yahoo.com/group/EnergyPlus_Support/join
(Yahoo! ID required)
<*> To change settings via email:
mailto:EnergyPlus_Support-digest@xxxxxxxxxxxxxxx
mailto:EnergyPlus_Support-fullfeatured@xxxxxxxxxxxxxxx
<*> To unsubscribe from this group, send an email to:
EnergyPlus_Support-unsubscribe@xxxxxxxxxxxxxxx
<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/