[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [EnergyPlus_Support] A question about Zone Lise Multiplier

Hello, Mike;
   
  Following your response, I multiplied all the capacities of HVAC compoents and capacity, chilled water flow rates, air flow rates, pump and fan capacities, heating and cooling coils capacities, pipe lengths and water flow ratesin radiant system,...and so on.
   
  However, it seems that the cooling capacities of radiant system still does not be mutiplied.  For example, the air flows rates are increased to 6 times, but the total cooling energy uses and radiant system cooling energy uses only increase a little bit.  Could you tell me what are the possible reasons for causing this problem? Weather the radiant surfaces area been multiplied 6 times when using the zone multiplier?
   
  Regards,
   
  Zhen    
   
  "Michael J. Witte" <mjwitte@xxxxxxxx> wrote:
  Yes.  Zone Multiplier and Zone List Multiplier are applied to zone level loads. 
All HVAC equipment serving a multiplied zone must have increased capacities 
and flow rates to serve the multiplied load, even zone equipment such as 
radiant slabs, window AC, fan coils, etc.  There is no HVAC system multiplier 
in EnergyPlus.

Mike


On 26 Jan 2005, at 11:11, Zhen Tian wrote:

> 
> Hello, everyone:
> 
> I have a question about using the "Zone List" & "Zone Group" objects.  Right
> now, I just simulate one typical floor for a multi-floor building. Since the fan
> energy use is not linear to the air flow rate. I am considering using the zone
> list and zone group to mimic this multiple floors.
> 
> In my model, I set up zone list and then Zone Group and set "zone list
> multiplier" as 6.  Then I increase the system air flow rate, chilled water flow,
> hot water flow and other system parametrics also 6 times to match the reauired
> air flow and so on.
> 
> Do I need to multiply zone equipments capacity? For example, if I have radiant
> cooling slab system and baseoard, do i need to multiply this capacity of
> equipment?  And do I also need to multiply the "zone air flow rate" and
> associated capacity of reheat coils?
> 
> Thanks for your help.
> 
> Regards,
> 
> Zhen
> 
> 
> ---------------------------------
> Do you Yahoo!?
>  Take Yahoo! Mail with you! Get it on your mobile phone.
> 
> [Non-text portions of this message have been removed]
> 
> 
> 
> 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.
> 
> Yahoo! Groups Links
> 
> 
> 
> 
> 
> 
> 
> 
> 



========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support      
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 not allowed -- please post any files to the appropriate folder in the Files area of the Support Web Site.



  
---------------------------------
  Yahoo! Groups Links
    
   To visit your group on the web, go to:
http://groups.yahoo.com/group/EnergyPlus_Support/
    
   To unsubscribe from this group, send an email to:
EnergyPlus_Support-unsubscribe@xxxxxxxxxxxxxxx
    
   Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. 



		
---------------------------------
Brings words and photos together (easily) with
 PhotoMail  - it's free and works with Yahoo! Mail.

[Non-text portions of this message have been removed]



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.idf and press the "search" button.
 
Yahoo! Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/EnergyPlus_Support/

<*> 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/