Dante,
Create and review many output variables so that you can see which system is working properly, which is not. Knowing this level of detail informs the troubleshooting effort immensely!
I always create a group of variables which demonstrates every node of an air loop, plus zone equipment performance – something like what I show below. I cannot imagine preparing an energy model without this information or its equivalent.
James V Dirkes II, PE, BEMP, LEED AP
www.buildingperformanceteam.com
Energy Analysis, Commissioning & Training Services
1631 Acacia Drive, Grand Rapids, MI 49504 USA
616 450 8653
From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of andresdagm
Sent: Wednesday, November 28, 2012 11:08 AM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] Re: proposed desing CS proyect
Hi all group,
thank for the answer,
I have ran my model but it have more that 300 hours not met (about 3000). I think that it is because my CAV systems have been designed to supply just the outdoor air requered and when it pass through the cooling coils it is not enough to cold the zones.
I dont know what to do on it, it is a issue that my proposed model is not completed designed
Thank you
Dante
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Jean Marais <jeannieboef@...> wrote:
>
> I ran this past some other leed experts. It appears you are supposed to
> complete the undesigned part of the hvac in the buildout zones with as
> close to the baseline systems in the norm as possible...most important is
> to keep them as thermodynamically similar as possible.
>
> On 20 November 2012 21:51, andresdagm <andresdagm@...> wrote:
>
> > **
> >
> >
> > thank you, sorry for my not well explanation.
> > Baseline is system 8, one VAV per floor.
> > For the proposed i have injector fans, they will supply outdoor air to
> > each zone, there will be chiller and duct but without any coil. tenat will
> > install the coils.
> > So, (option)what i have modeled is the injector fans, and there include a
> > coil of cold water and in each zone include the paralel box like in the
> > baseline.
> > Another way (option 2)that i can model is model VAV that will supply
> > outdoor air and cooling equal than in my baseline, but, what about my
> > injector fans that will supply outdoor air (i can simulate it double).
> >
> > i dont know wheter option 1 or potion 2 is correct.
> > thank you
> > Dante
> >
> >
> > --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Jean Marais <jeannieboef@>
> > wrote:
> > >
> > > If the HVAC is not designed then you should model the baseline system in
> > > the proposed case. I can double check this for you, but that is how I
> > read
> > > it.
> > >
> > > On 20 November 2012 21:31, andresdagm <andresdagm@> wrote:
> > >
> > > > **
> >
> > > >
> > > >
> > > >
> > > > Thank you, the baseline case is already modeled. My question is about
> > the
> > > > proposed building because it is not completed designed and i am not
> > sure if
> > > > i am modelling it correct or not.
> > > >
> > > > --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, jeannieboef <jeannieboef@>
> > > > wrote:
> > > > >
> > > > > The design case is modeled as designed. The baseline case system
> > > > > selection is mainly based on the fuel type used in the proposed
> > design
> > > > > for heating. See the norm for selection. It is just one "dominant"
> > > > > system and not mixed, unless one or more of the exceptions apply.
> > > > >
> > > > > Sent from my iPhone
> > > > >
> > > > > On 20.11.2012, at 17:58, "andresdagm" <andresdagm@> wrote:
> > > > >
> > > > > > My proposed desing has a mechanical ventilation system, there are
> > > > > > injector fan that will provide outdoor air to each zone. There are
> > > > > > one injector per vertical duct. Furthermore, no coils have been
> > > > > > designed, just there will be chillers and each tenant will install
> > > > > > their coils. (Surely, There will be fancoils but it won't be in any
> > > > > > lease agreement and it is not designed)
> > > > > > I think that I need to make a mix between the proposed and baseline
> > > > > > (system 8), I will model the injector fans and I will include coils
> > > > > > of cold water, in each zone I will install a parallel piu reheat
> > > > > > like in the baseline, I don't know if it is right or not???,
> > because
> > > > > > in the baseline I have VAV systems, and one per floor, and in my
> > > > > > proposed I am modeling CAVs (the injector fan are constants.)
> > > > > >
> > > > > > I really appreciate your help and corrections.
> > > > > > Dante GarcÃa
> > > > > >
> > > > > >
> > > > >
> > > >
> > > >
> > > >
> > >
> >
> >
> >
>
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