[TRNSYS-users] PID controller: Digital or Continuous?

[王洋]

Dear all,

     I have a simple question about Type 23. Is it Digital or Continuous
Controller? Continuous?
 Is Type 22? Digital? I'm a little puzzled.

   Many thanks in advance!

  Br.

 wang

2011/9/21 <trnsys-users-request at cae.wisc.edu>

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> Today's Topics:
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>   1. Active Layer and auto segmentation (Avesani Stefano )
>   2. Re: Step by step example (Matt Duffy)
>
>
> ---------- 已转发邮件 ----------
> From: "Avesani Stefano " <stefano.avesani at eurac.edu>
> To: <trnsys-users at cae.wisc.edu>
> Date: Wed, 21 Sep 2011 18:07:09 +0200
> Subject: [TRNSYS-users] Active Layer and auto segmentation
>
> Dear all,****
>
> ** **
>
> Why is not the button “Divide surface” always present?****
>
> I am simulating a radiant wall with “standard” features (pipe spacing 15
> cm, pipe ext diameter 2 cm, pipe thickness 2 mm).****
>
> ** **
>
> Furthermore, I have found no information about how the parameter “number of
> fluid loops” is taken into account in the mathematical model. Do you have
> any idea? ****
>
> ** **
>
> Last question: how does TRNSYS calculate the minimum allowed inlet mass
> flowrate in case of a “number of fluid loops” greater than 1?****
>
> ** **
>
> Thanks a lot!****
>
> With best regards!
>
> ****
>
> Stefano****
>
> ** **
>
>
> ---------- 已转发邮件 ----------
> From: "Matt Duffy" <duffy at tess-inc.com>
> To: fouih.younness at gmail.com, trnsys-users at cae.wisc.edu
> Date: Wed, 21 Sep 2011 11:46:25 -0500 (CDT)
> Subject: Re: [TRNSYS-users] Step by step example
>
>
>
> Dear Younness,
>
> The TRNSYS Volume 1 document steps through a simple TRNSYS simulation. The
> heat exchanger components are very similar in concept to the other typical
> TRNSYS components such that it has time independent (constant) parameters,
> inputs (either variable from another component or a constant input value),
> and outputs. There is the TRNSYS Mathematical Reference Volume 4 document
> with information about the heat exchanger models in TRNSYS. There are a few
> examples with the TESS HVAC Library in the ".\Tess Models\Examples"
> directory with TESS Heat Exchanger models.
>
> Best regards,
>
> Matt Duffy
>
> *----- Original Message -----*
> *From:* "youness EL FOUIH" <fouih.younness at gmail.com>
> *Sent:* Tue, September 20, 2011 9:55
> *Subject:* [TRNSYS-users] Step by step example
>
> Hello,
> Please if any one of you have a  "step-by-step" tutorial showing how we can
> simulate a heat exchanger system (any one) using TRNSYS, I would be grateful
> if can send it to me or show me the URL of the tutorial.
> thanks a lot.
> Younness
>
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