Re: [EnergyPlus_Support] Zero flow in HW pri-sec loop with Water Heater: Mixer

["Michael J. Witte" <mjwitte@xxxxxxxx>]

That is correct.  For a primary-secondary loop modeled using the connection 
component, the primary side will autosize to zero.  Note that this will get 
easier in the next release.  But for now, the primary side must always be sized 
manually.

Mike


On 16 Feb 2007 at 13:44, Richard Raustad wrote:

> Try manually sizing your boiler. The eio file shows the capacity and 
> flow rate as 0. There is a known issue with autosizing plant components 
> in certain cases.
> 
> Eric Yang wrote:
> 
> > Any suggestions on this question?
> >
> > ________________________________
> >
> > From: EnergyPlus_Support@xxxxxxxxxxxxxxx 
> > <mailto:EnergyPlus_Support%40yahoogroups.com>
> > [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx 
> > <mailto:EnergyPlus_Support%40yahoogroups.com>] On Behalf Of Eric Yang
> > Sent: Wednesday, February 14, 2007 11:26 AM
> > To: EnergyPlus_Support@xxxxxxxxxxxxxxx 
> > <mailto:EnergyPlus_Support%40yahoogroups.com>
> > Subject: [EnergyPlus_Support] Zero flow in HW pri-sec loop with Water
> > Heater: Mixer
> >
> > Hi,
> >
> > I have experiencing zero flow for the primary heating water loop,
> > though I have flow for the secondary heating water loop. The water
> > heater is also having zero flows.
> >
> > I understand the water heater object is completely passive, but don't
> > know how to solve the zero flow issues.
> >
> > Thanks in advance for your suggestions. I have uploaded the
> > file "5ZoneVAV-Pri-SecLoop-hotwater-zeroflow.zip".
> >
> > Eric (Miao)
> >
> > [Non-text portions of this message have been removed]
> >
> >  
> 
> 
> -- 
> Richard A. Raustad
> Senior Research Engineer
> Florida Solar Energy Center
> University of Central Florida
> 1679 Clearlake Road
> Cocoa, FL  32922-5703
> Phone:   (321) 638-1454
> Fax:     (321) 638-1439 or 1010
> Visit our web site at: http://www.fsec.ucf.edu
> 
> UCF - From Promise to Prominence: Celebrating 40 Years
> 
> 
> 
> [Non-text portions of this message have been removed]
> 
> 
> 
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> 
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> 
> 
> 
> 
> 






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