[TRNSYS-users] Simplified heating and cooling based onoperativetemperature

Thu Feb 18 06:51:49 PST 2010

Hello Ms. Jansen and Mr. Sourbron!

I also think the solution has to be outside Type56.

If You use an iterative-feedback-controller (Type22) instead of Type2 and
feed the operative temperature in as "controlled variable", define Your
Setpoint and give the output of the controller as Gain in the thermal zone
You should be able to avoid the hysteresis-effect occoring when using Type2.
(You can also set a maximum output/heating power).

Using Type2 a bigger Deadband or a shorter timestep my also solve the
problem.

With kind regards,
    Matthias Kersken

---

Dipl.-Ing. Matthias Kersken
Wissenschaftlicher Mitarbeiter / Abteilung Energiesysteme

Fraunhofer-Institut für Bauphysik 
Institutsteil Holzkirchen

Fraunhoferstraße 10
83626 Valley

eMail: Matthias.Kersken at ibp.fraunhofer.de
Telefon 08024 / 643-204
Telefax 08024 / 643-366
www.ibp.fraunhofer.de <http://www.ibp.fraunhofer.de/> 

Dipl.-Ing. Matthias Kersken
Research Associate / Department Energy Systems 

Fraunhofer Institute for Building Physics 
Branch Holzkirchen

Fraunhoferstraße 10
D-83626 Valley

eMail:  <mailto:Matthias.Kersken at ibp.fraunhofer.de>
Matthias.Kersken at ibp.fraunhofer.de
Phone +49 8024 / 643-204
Fax +49 8024 / 643-366
 <http://www.ibp.fraunhofer.de/> www.ibp.fraunhofer.de

---

  _____  

Von: Sabine Jansen - BK [mailto:S.C.Jansen at tudelft.nl] 
Gesendet: Donnerstag, 18. Februar 2010 14:51
An: Maarten Sourbron; trnsys-users at cae.wisc.edu
Betreff: Re: [TRNSYS-users] Simplified heating and cooling based
onoperativetemperature

Dear all,

I am also interensted in that question.

The only way I know now how to solve this is by using a type (controller,
type 2 or thermostat, type 8) outside type 56. The the operative zone
temperature must be connected to this type (e.g. 2b and creating a schedule
elsewhere, in an equation solver), and the heating must be defined as a
limited power connected to an input, which is then the output of the control
type (type 2 or type 8).

One problem with this approach is that I cannot use a very large heating
power anymore, since that causes the controller to switch on and off. Thus
the heating power must be determined using the ideal heating, based on air
temperature, first.

If there is an easier way, I am also very happy.

Kind regards,

Sabine Jansen

  _____  

Van: Maarten Sourbron [mailto:Maarten.Sourbron at mech.kuleuven.be]
Verzonden: do 18-2-2010 13:53
Aan: trnsys-users at cae.wisc.edu
Onderwerp: [TRNSYS-users] Simplified heating and cooling based on
operativetemperature

Dear all,

The simplified heating and cooling in Trnbuild is now comparing the zone
AIR temperature with the given set points.  Is there a way to change
this (or another controller model) to have the zone OPERATIVE
temperature compared with the set points?

Kind regards,

Maarten Sourbron

--
Departement Werktuigkunde-Department of Mechanical Engineering
Katholieke Universiteit Leuven
Celestijnenlaan 300A bus 2421
3001 Heverlee (Leuven)
T : 0032 (0)16 32 28 73
F : 0032 (0)16 32 29 85
E : Maarten.Sourbron at mech.kuleuven.be

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