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[EnergyPlus_Support] Re: Humidity
I guess I was not able to expound my equestion well. What I meant
was how I can get the TRANSPORT energy for the vehicle which brings
outside air to the indoor environment. I.e. a fan in the Fresh Air
Unit(FAU) or whatever . Anyhow outside mixer has to cost something
taking air from outside, while it seems not be considered as far as
I know.
Not the energy use after outside air has been in the space.
Eric
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Michael J. Witte"
<mjwitte@g...> wrote:
>
> The best available approach is to run a second simulation with the
outside air
> flow rate set to zero. The difference in energy consumpiont
between the two
> simulations will reflect the net change in energy use required to
condition
> outside air. Remember that outside air can be beneficial on mild
days.
>
> Mike
>
>
> On 2 Dec 2005, at 1:35, hbn_pch wrote:
>
> > Eric,
> > In reality,there is no variable to report the energy
consumption
> > by the outside air system.If you want to gain the value,you
should
> > use the total energy consumption subtract the fancoil energy
> > consumption.
> > It's my suggestion.Good luck.
> >
> > pch
> >
> > --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "eric_zhou1223"
> > <eric_zhou1223@y...> wrote:
> > >
> > >
> > > Thank you for your response, Mike.
> > >
> > > There is another question. How can I consider the energy
> > consumption
> > > by the outside air mixer in a fancoil system? I didnot found
there
> > > is a variable in the simulation result which is responsigble
for
> > the
> > > electricity use of transporting the fresh air into the indoor
space.
> > > As far as I know, that would be a pretty significant part in
the
> > > HVAC system's energy consumption. Likewise, in the VAv system,
> > there
> > > exists a similar problem, what would be end user for
introducing
> > > outdoor air? The central fan in the AHU?
> > >
> > > Eric
> > >
> > >
> > >
> > >
> > >
> > > --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Michael J. Witte"
> > > <mjwitte@g...> wrote:
> > > >
> > > > I suspect that the window AC is running with cycling fan
while
> > > the other
> > > > systems are continuous fan. Make the the window ac objects
(AIR
> > > > CONDITIONER:WINDOW:CYCLING and
> > > COIL:DX:CoolingBypassFactorEmpirical) are set to
> > > > continuous fan (ContFanCycComp).
> > > >
> > > > Mike
> > > >
> > > >
> > > > On 30 Nov 2005, at 14:49, eric_zhou1223 wrote:
> > > >
> > > > > Hi,
> > > > >
> > > > > With thermostats control in some zones, I noticed a
> > > windowAC
> > > > > system can achieve a notablly lower relative humidity than
a
> > > fancoil
> > > > > system or the whole-air system in summer days. Given that
all
> > > other
> > > > > conditions are kept the same, i,e.,cooling capacity,
building
> > > > > discriptions, supply air design condition,and so forth.
Is
> > this
> > > result
> > > > > reliable? If yes , what would be the reason?
> > > > >
> > > > > Thank you .
> > > > >
> > > > > Eric
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > 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
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > >
> > > >
> > > >
> > > > ========================================================
> > > > Michael J. Witte, GARD Analytics, Inc.
> > > > EnergyPlus Testing and Support
> > > > EnergyPlus-Support@g...
> > > >
> > >
> >
> >
> >
> >
> >
> >
> >
> > The primary EnergyPlus web site is found at:
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> >
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>
> ========================================================
> Michael J. Witte, GARD Analytics, Inc.
> EnergyPlus Testing and Support
> EnergyPlus-Support@g...
>
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