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[EnergyPlus_Support] Re: Solar collectors: "Branches cannot handle all the flow"



Hi,

I've allready tried to put all my branches passive but it still doesn't work! I'm really upset!
If you have any other idea...




--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Abdelali Ait El Cadi <abdelali.aitelcadi@...> wrote:
>
> hi,
> 
> i've never worked on solar collectors modelling.
> 
> i've another alternative for you, if the flow rate value is not so important in your model, make all branches passive one to avoid flow control.
> 
> i hope that will work.
> 
> 
> --- On Thu, 5/28/09, davylagre <davylagre@...> wrote:
> 
> From: davylagre <davylagre@...>
> Subject: [EnergyPlus_Support] Re: Solar collectors: "Branches cannot handle all the flow"
> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> Date: Thursday, May 28, 2009, 10:17 AM
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> Hello,
> 
> 
> 
> Thanks for your post! Unfortunately, it doesn't solve my problem! I put 0 in maximum flow rate for each branch but the same error still occurs!
> 
> In your case, have you ever work in solar collectors modeling?
> 
> 
> 
> --- In EnergyPlus_Support@ yahoogroups. com, Abdelali Ait El Cadi <abdelali.aitelcadi @...> wrote:
> 
> >
> 
> > hello,
> 
> > 
> 
> > i had the same problem in my hydronic low radiant system, and i solve it by putting 0 in maximum flow rate for each branch, because this field is required for air loops and not for water loops.
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> > --- On Wed, 5/27/09, davylagre <davylagre@ ..> wrote:
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> > 
> 
> > From: davylagre <davylagre@ ..>
> 
> > Subject: [EnergyPlus_ Support] Solar collectors: "Branches cannot handle all the flow"
> 
> > To: EnergyPlus_Support@ yahoogroups. com
> 
> > Date: Wednesday, May 27, 2009, 12:13 PM
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> >       
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> >       I'm trying to model solar collectors (again!). I want to model solar collectors as follows:
> 
> > 
> 
> > oooooooooo
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> > 
> 
> > oooooooooo      (o = solar collector)
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> > 
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> > oooooooooo
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> > oooooo
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> > When I model collectors as follows:
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> > oooooooooo
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> > o
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> > o
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> > o
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> > An error occured :
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> > 
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> > ** Severe  ** Branches cannot handle all the flow. Possible causes could be absence of Bypass,
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> > 
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> > **   ~~~   ** or components that are manually sized incorrectly.  Consider autosize where possible.
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> > 
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> > **   ~~~   ** To fix add a Bypass branch or size the other ACTIVE/PASSIVE branches to equal the loop flow
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> > **   ~~~   ** Occurs in Plant Loop=DHW LOOP
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> > **   ~~~   ** Occurs for Splitter=DEMAND SPLITTER
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> > But, all my components are autosize!! Thus, my installation doesn't have any bypass, so I don't want to model bypass!
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> > 
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> > Is there anybody able to solve this problem?
> 
> >
>




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