[EnergyPlus_Support] Re: Hot Water Reset Savings?

["noelcrrl" <noelcrrl@xxxxxxxxx>]

Hi Mike...thanks for the response...

I am having the same issue with chilled water reset...is this to be 
expected?

Noel


--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Michael J. Witte" 
<mjwitte@...> wrote:
>
> No, BOILER:SIMPLE does nothing more than apply the nominal 
efficiency and a 
> part-load curve.  It does not model any jacket losses, and so it's 
efficiency 
> is not sensitive to the supply temperature.  Also, with no piping 
losses in the 
> simulation, that effect is not present either.  So, I would expect 
the same 
> boiler energy consumption for these two cases.
> 
> I can't think of an easy way to model this with current 
capabilities.
> 
> Mike
> 
> 
> On 1 Jun 2007 at 2:44, noelcrrl wrote:
> 
> > Dear All-
> > 
> > I am tying to estimate the energy savings of implementing a hot 
water 
> > reset as a function of outside air.  The object was entered as 
shown 
> > at the end of this message.  When I implement the hot water 
reset, 
> > the energy consumption of the boiler does not change-no energy 
> > savings.  Why is this the case?  Does the boiler:simple object 
take 
> > into account water delivery temperature into its energy 
consumption 
> > calculation?
> > 
> > SET POINT MANAGER:OUTSIDE AIR,
> >     Hot Water Loop HW Temp Manager,  !- Name
> >     TEMP,                    !- Control variable
> >     82.2,                    !- Set point at outside low {C}
> >     -6.7,                    !- Outside low {C}
> >     65.6,                    !- Set point at outside high {C}
> >     10,                      !- Outside high {C}
> >     Hot Water Loop HW Supply Outlet;  !- Name of the set point 
Node 
> > 
> > Note, I am using the boiler simple object.  Thanks in advance.
> > 
> > Noel
> > 
> > 
> > 
> > 
> > 
> > 
> > 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.pdf 
under the
> > Documentation link and press the "search" button.
> > 
> > Yahoo! Groups Links
> > 
> > 
> > 
> > 
> > 
> 
> 
> ========================================================
> Michael J. Witte, GARD Analytics, Inc.
> EnergyPlus Testing and Support      
> EnergyPlus-Support@...
>




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