Re: [EnergyPlus_Support] Greenhouse airflow simulation

[Lixing Gu <gu@xxxxxxxxxxxx>]

Marzia:

I looked at the uploaded input file. Since I don't know which weather file 
you are using, I used Chicago weather data to perform the test. In addition, 
I added one more report variable of Window/Door Venting Opening Factor to 
see large opening response. Output results show these large opneings 
response as specified. Please let me know which opening does not response as 
you specified.

One more suggestion is that please don't specify any interior surfaces twice 
in the AirflowNetwork model. You can specify winter and summer control 
conditions using schedules.

Best regards,

Lixing Gu


----- Original Message ----- 
From: "marziasedino" <marziasedino@xxxxxxxx>
To: <EnergyPlus_Support@xxxxxxxxxxxxxxx>
Sent: Wednesday, January 16, 2008 3:55 AM
Subject: [EnergyPlus_Support] Greenhouse airflow simulation


Hello,
I am trying to simulate a greenhouse space adjacent to a two thermal
zones building, I created the model with DesignBuilder and exported
it in E+,
The greenhouse external wall has got a big window open during summer
and closed during winter time.
The partition wall between the greenhouse and the adjacent thermal
zone has got 4 detailed openings (and one main door) which should
open as specified in the following schedule being their ventilation
control mode "temperature":
- during summer when the temperature of the adjacent thermal
zone (zone name: 6346) is higher than 22°C and higher that the
outside temperature;
- during winter when the temperature of the greenhouse (zone
name: 6339) is higher than 22°C and higher than the outside
temperature.
I defined those openings twice in
the "AirflowNetwork:Multizone:Surface": the first time considering
them belonging to the greenhouse zone (6339) and the second time
considering them belonging to the thermal zone (6346) in order to
assign them the two specified different schedules (summer and winter)
as they refer to different zones temperatures.
Nevertheless when I analyse AirflowNetwork Volume Flow Rate outputs I
can't see the openings work correctly: I expect to see more flow when
they should be open and only infiltrations when they are closed; but
this is not happening.

Could you tell me please if there is a better way to model them?
I uploaded my file in the appropriate space, its name
is: "greenhouse#1"

Thanks

Marzia Sedino




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






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/