Dear Dimos,
The Boiler and ovens will operate on different schedules with
different loads and will have different part load efficiencies.
Therefore, I think you should model them separately, not as a combined
object.
I have not modeled ovens before in E+, but I have applied them in
buildings. A typical oven will lose heat to the zone it occupies
through the oven walls, so you'll need to know the insulation value of
those walls and calculate that rate. The rate will vary as the oven
warms up and cools down, so you will need to know the operating schedule.
An oven also loses heat through the stack. That is the amount which
should be assigned to the "Fraction Lost" field.
--- In
EnergyPlus_Support@ yahoogroups. com, D T <ellinas.1984@ ...> wrote:
>
> Thanks for the help. I now understand why I'm not
getting values.
However, my ultimate goal is to obtain monthly gas usage values for
one boiler and 4 ovens for the facility I am modeling. Since I'm
trying to model a boiler and 4 ovens, could I just simply specify the
total power input from the boiler and ovens (in watts) under the GAS
EQUIPMENT object? When I did that, I got an error in my simulation. Or
do I need to use the boiler object and something else for the ovens?
I'm still struggling with trying to get gas usage values for this part
of my work. Any help or suggestions would be appreciated.
>
> Thank you,
> Dimos
>
> --- On Mon, 7/28/08, JV Dirkes II <jvd2pe@...> wrote:
>
> From: JV Dirkes II <jvd2pe@...>
> Subject: [EnergyPlus_ Support] Re: need help w/ monthly gas usage results
> To:
EnergyPlus_Support@ yahoogroups.
com> Date: Monday, July 28, 2008, 12:48 PM
>
>
>
>
>
>
> Dear Dimos,
>
> I took a look at your file and I think your problem is this:
>
> 1) You have an ELECTRIC heating coil in the furnace.
> 2) Since the Furnace is the only heating object, and its coil uses
> electricity, there is no load for the Boiler:Steam.
> 3) Therefore, there is no gas consumption.
>
> --- In EnergyPlus_Support@ yahoogroups. com, "ellinas.1984"
> <ellinas.1984@ ...> wrote:
> >
> > Hello group,
> > The facility I am modeling has two boilers. I specified one of them
> > under the boiler object in EnergyPlus just to see how it would run. I
> > also specified the gas rate schedule. However, when I run the
> > simulation and view the results, I get values of zero for the monthly
> > gas
usages. Unlike the results from the electricity rate schedule
that
> > I specified, where it shows the monthly usage in the results, I get
> > nothing for the gas. Is there anyone out there that knows how to help
> > me solve this problem?
> >
> > Thank you,
> > Dimos
> >
> > p.s. I uploaded my idf file. It is bakery3.idf with the subtitle "gas
> > rate usage values" under the problem submittal folder.
> >
>