[Equest-users] Sizing of equipment

[Carol Gardner]

Also, make sure the throttling range is 4-6 not whatever it defaults 
too. There is a writeup in online help talking about why you should do so.

Carol

Sam Mason wrote:
>
> Janne,
>
> Without information on HW loop temp, cooling system type and control, 
> and heating control, it’s tough to figure out what is going on with 
> your model. That being said, I will provide what help I can. The 
> sizing ratios on the coils only increase the coil size and do not 
> increase airflow which is generally why zones will have hours out of 
> range. Check the minimum flow ratio and airflow to your zones and make 
> sure they are appropriate for the loads in the space. With regards to 
> your system setup, make sure your reheat setpoints and supply air 
> setpoints are consistent.
>
> For future reference, if you provide the input file, myself or others 
> on the list serve will be able to better respond to future questions.
>
> Sam
>
> --
> Sam Mason
> Atelier Ten
> sam.mason at atelierten.com
>
> *From:* equest-users-bounces at lists.onebuilding.org 
> [mailto:equest-users-bounces at lists.onebuilding.org] *On Behalf Of 
> *Kairento, Janne
> *Sent:* Tuesday, January 13, 2009 11:03 AM
> *To:* equest-users at lists.onebuilding.org
> *Subject:* [Equest-users] Sizing of equipment
>
> Hey All,
>
> I am running a load with many zones on 5 floors totaling over 300 
> zones. There are some zones with many unmet hours, some of the core, 
> some perimeter. I went in and changed the sizing ratio of these zone 
> to reduce the unmet heating hours. I am modeling this building with 9 
> AHU’s, all VAV w/ reheat. Does anyone have any insight or suggestions 
> on why or how these unmet hrs. exist. I have changed the hot water 
> loop flow GPM but it had no effect on the unmet heating hrs. so I 
> deduced this is not the cause.
>
> *Janne Kairento, E.I.T., LEED AP*
> */Cosentini Associates/*
> One Broadway
> Cambridge, MA 02142
> Phone: 617.494.9090
> Fax: 617.494.9292
>
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