[EnergyPlus_Support] Re: Hot Water Loop Temperatures

["anarui.oliveira" <anarui.oliveira@xxxxxxxxx>]

Right.
I switched the pump operation to intermittent and it doesn't happen 
any more.
Maybe I only noticed it after adding the internal gains because the 
overall temperatures became higher(?); I checked and it also happened 
before adding the internal gains, although the temperatures didn't 
rise so much.
Thanks.

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Michael J. Witte" 
<mjwitte@...> wrote:
>
> My guess is that the hot water loop pump is running continuously 
and adding 
> pump heat to the loop.  Check the pump controls on the chilled 
water loop, it 
> may also be running continuosly, but in the chilled water loop, the 
chiller 
> will come on to offset the pump heat.  You may wish to schedule the 
pump 
> operation or change it to intermittent for both loops.
> 
> Mike
> 
> 
> On 14 Jan 2008 at 18:34, anarui.oliveira wrote:
> 
> > When I add internal gains to may model, (which as a chilled and a 
hot 
> > water loop, served by chiller and boiler, respectively), the 
> > Temperatures at the inlet and outlet of the hot water loop (and 
> > boiler), in a summer week, when the boiler is off (I checked!) 
start 
> > rising steadily, well above the nominal boiler temperature and 
the zone 
> > temperatures (even those of the uncontrolled zones).
> > NO similar effect occurs in the chilled water loop, nor in the 
winter 
> > nor in the summer.
> > I can't see the relationship behind this effect and I'm worried 
it 
> > reveals some problem with the modelling.
> > Can anyone help me?
> > 
> > Thank you,
> > Ana Rui
> > 
> > 
> > 
> > The primary EnergyPlus web site is found at:
> > http://www.energyplus.gov
> > 
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> > 
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appropriate folder
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> > 
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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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