Re: [TRNSYS-users] Simplified heating and cooling based on operativetemperature

[Erik Olsen <olsen@transsolar.com>]

Maarten, Sabine,

This is accomplished by a reverse approach.  Set the heating or cooling air setpoint temperature with type 56 as an input.  Then, you can use an equation in the dck to calculate this variable setpoint temperature (e.g. the air temperature required to achieve your operative temperature setpoint, based on the current mean radiant temperature).

Erik

Erik Olsen, PE
212 219 2255 | olsen@transsolar.com
Transsolar Inc. | 134 Spring St. Suite 601 | New York, NY 10012

Transsolar Climate Engineering
Technical consulting for energy efficiency and environmental quality in buildings
New York - Stuttgart - Munich

Sabine Jansen - BK wrote:

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@mech.kuleuven.be]
Verzonden: do 18-2-2010 13:53
Aan: trnsys-users@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
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3001 Heverlee (Leuven)
T : 0032 (0)16 32 28 73
F : 0032 (0)16 32 29 85
E : Maarten.Sourbron@mech.kuleuven.be

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