[EnergyPlus_Support] Re: Solar Heating System

["ingdallolio" <ing.dallolio@xxxxxxxxx>]

Thanks a lot Mike, for both this one and the one about the equipmen 
in series error message. It looks like now I managed to run with the 
two equipments in series, I have uploaded the file few days ago, but 
I'll try the parallel too, to see if things change. Thanks Again.
Andrea. 


 --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Michael J. Witte" 
<mjwitte@g...> wrote:
> The current water heater model can be a bit difficult to work 
with.  I would 
> suggest putting the boiler in parallel with the water heater rather 
than in 
> series.  I know the real system would put them in series, but for 
the 
> simulation the energy use should be equivalent.  This way the mass 
flow does 
> not have to be the same in both components which may be why you are 
having 
> trouble with them.
> 
> Sorry about the slow response.
> 
> Mike
> 
> 
> On 3 Feb 2005, at 12:35, ingdallolio wrote:
> 
> > 
> > 
> > I'm modeling a solar collector heating system with low 
temperature 
> > radiant floor.
> > I'm using a water heater object to exchange heat from the 
collector 
> > loop to the radiant floor water loop. I'd like to run with both 
solar 
> > energy and gas (as backup energy source). The gas burner should 
start 
> > when the temperature on the second loop ( radiant floor ) goes 
below 
> > 30C. If I set the water heater set point to 30C the temperature 
> > inside the water heater tank ( collector loop) does not go above 
> > 30C !. I'd like the water heater storage temperature to go as 
high as 
> > possible, in order to storage as much solar energy as possible. I 
was 
> > thinking to use two heater ( a water heater and a boiler objects) 
in 
> > series but I can't make this working.
> > Any idea?
> > Thanks, Andrea.  
> > 
> > 
> > 
> > 
> > 
> > 
> > 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.
> > 
> > Yahoo! Groups Links
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> 
> 
> 
> ========================================================
> Michael J. Witte, GARD Analytics, Inc.
> EnergyPlus Testing and Support      
> EnergyPlus-Support@g...





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