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

Re: [EnergyPlus_Support] Re: Time Setpoint Not Met and Zone Multiplier





The autosize should have done that -- if you think not, please submit your file to the helpdesk.

At 08:29 AM 3/1/2012, Carolina Galeazzi wrote:


Hi Linda,
I am autosizing all equipments, and all zones have similar hours not met,  around 300 hours in total.  But if I multiply my middle floors, I get around 3000 hours in total, but the numbers of hours are increased only for those multiplied zones. Should I also multiply the middle floor air handling unit by 8 somehow?
 
Thank you
Carolina
De: Linda Lawrie <linda@xxxxxxxxxxxxxx>
Para: EnergyPlus_Support@xxxxxxxxxxxxxxx
Enviadas: Quinta-feira, 1 de Março de 2012 10:53
Assunto: Re: [EnergyPlus_Support] Re: Time Setpoint Not Met and Zone Multiplier

 
Autosize should take care of any of those system or plant fields -- however, if you have any hard sized fields mixed in you will need to multiply them.

From the Tips & Tricks document:

Guidelines for Using Multipliers and Groups
At 06:41 AM 3/1/2012, Carolina Galeazzi wrote:


Hi Mario,
Thank you for your answer.
According to the IOR, I have to multiply by 8 the capacity of my system to meet the entire multiplied zone?
Energyplus autosizing wouldn't do that by itself?
I didn't understand your question about the filed restricted, what do you mean?
 
Regards,
Carolina
De: MÃ?Æ?Ã?¡rio <mneves32@xxxxxxxxx>
Para: EnergyPlus_Support@xxxxxxxxxxxxxxx
Enviadas: Quinta-feira, 1 de Mar�§o de 2012 8:29
Assunto: [EnergyPlus_Support] Re: Time Setpoint Not Met and Zone Multiplier

 
Hello,

Acording to the IOR:

"Field: Multiplier
Zone Multiplier is designed as a "multiplier" for zone loads. It takes the calculated load for the
inputted zone and multiplies it and sends the multiplied load to the attached system to meet
the demand. The system will have to be specified to meet the entire multiplied zone load and
will report the amount of the load it can meet in the Zone/Sys Sensible Heating or Cooling
Energy/Rate report variable. The default is 1."

So are you sure you don�´t have any individual, field restricted to responde only to a single zone?

MN

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Carolina Galeazzi <caro_poa@...> wrote:
>
> Dear All,
> Ã?? I am simulating
> an existing building, with 14 floors in total but 8 of them are identical
> floors. For these, I have modeled one typical floor and used a multiplier of 8 in each zone to represent
> all floors. However, I was having huge time setpoint not met (I am autosizing
> all capacities and flow rates). I simulated the building again without the
> multiplier, this has decreased the setpoint to below 300 unmet hours, as it
> should be regarding ASHRAE 90.1.
> Ã?? Please
> correct me if I am wrong, but I understand that only the zones were multiplied,
> not the AHU that I have for each floor, because the multiplier was defined
> within the zone.
> Ã?? My question
> is: Is there a way that I could use the multiplier also for the AHUs that are
> connected to these multiplied zones, to have a correct result of total load? Or
> should I not use multiplier and multiply the load of the typical floors by 8 �¢??by
> hand�¢?? (not sure if this is acceptable thothough)?<)?
> Thank you in
> advance for your feedback and suggestions,
> Carolina
>










__._,_.___


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.




Your email settings: Individual Email|Traditional
Change settings via the Web (Yahoo! ID required)
Change settings via email: Switch delivery to Daily Digest | Switch to Fully Featured
Visit Your Group | Yahoo! Groups Terms of Use | Unsubscribe

__,_._,___