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Re: [TRNSYS-users] Top control in the Type 56

Heloise,
  If you are using the automatic heating and cooling types that are built into Type56/TRNBuild then these only pay attention to the zone air temperature in order to compute the sensible load on the space. The control of those components is assumed to be instantaneous and ideal. If you are simulating a building and an actual HVAC system then you can set up the HVAC system to pay attention to whatever Type56 output variables that you want (including operative temperature). PID control is possible using Type22 but in my experience a lot of portions of the HVAC system are based on ON/OFF control (Type108). When implementing controls of any kind you need to make sure that your timesteps are small (1 to 5 minutes); recall that TRNSYS can make one control decision per timestep and then it must stick with that decision until the next timestep.
Regards,
 David


On 11/8/2010 10:25, Heloise PELEN wrote:

Dear TRNSYS users,

 

The Type 56 uses a control on the air temperature « TAIR » to compute the sensible heat demand of each thermal zones.

This temperature does not include the surface temperature and doesn’t fully describe the temperature actually felt by the human, body.

 

Is there a way to control the operative temperature, rather than on the air temperature, in type 56 ?

I thought about using Type 22 but the simulation seems rather unstable with more than on Type 22, and I would like to be able to control the operative temperature in each thermal zones.

 

Thanks for your help !

 

Best regards,

Héloïse Pelen

ETAMINE

etamine_mail

heloise.pelen@etamine.coop

75 rue de la Villette - 69003 Lyon

Std : 04 37 45 34 20 / Fax : 04 37 45 41 38

Ld : 04 37 45 34 13 / Port : 06 65 07 41 77


Visitez notre site web : www.etamine.coop !

 


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