Dear Adrien,
I have seen in example PID-Cooling-Flowrate that the control signal is used to
modulate the cold-side flowrate; so I think it can be used in this way.
In my model, I don't understand why the outlet temperature ( first of all the
outlet flowrate) from the collector has such big oscillations and it 's not
fixed at 280°C.
Any advices are accepted. Thanks.
> Date: Wed, 2 May 2007 17:05:23 +0200> From: [EMAIL PROTECTED]> To: [EMAIL
> PROTECTED]> CC: [email protected]> Subject: Re: [TRNSYS-users]
> Request> > Dear Samuel,> > If you see the example concerning the use of PID,
> you will see that the > PID output 1 ('control signal') is defined as an
> energy (in kJ/hr) used > to heat or cool the building. So I think that you
> have to adapt the PID > output with an equation to obtain a fluid flow rate.>
> > I think that tPiD only give the energy rate necessary to maintain the >
> controled variable at the setpoint.> > Maybe you can have a look at this
> example in "feedback control" to see > how are used PID.> > I am not really
> sure of what I say, so if someone is able to confirm or > to cancel what I
> said, he's welcome...> > Best regards,> > Adrien> > Samuele a écrit :> > Dear
> all,> > > > I'm trying to build a model in which there are a variable speed
> pump > > and a linear parabolic concentrator: I'm using a pid controller to >
> > regulate the inlet flowrate for the liner parabolic concentrator > >
> because I need that the outlet temperature from the concentrator is > >
> costant ( 280°C).> > > > I have seen the result but I don't know if it's
> working well. There is > > the file.tpf enclosed.> > > > Could anybody tell
> me if anything is wrong?> > > > Thanks in advance.> > > >
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> ***************************************************************> Adrien
> JEZEQUEL > Ingénieur en Simulations Dynamiques> ITF (Ingénierie Tous
> Fluides)> 87, route de Chambéry> 73230 ST ALBAN EN LEYSSE> FRANCE> Tel:
> 04.79.75.00.29> Website: www.itf.biz> Mail : [EMAIL PROTECTED]> >
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