Re: [TRNSYS-users] night ventilation, type8b

Thanks David, type 108 works fine!

Best,

Mariëlle Nuchelmans

Van: David Bradley [mailto:bradley@tess-inc.com]
Verzonden: donderdag 15 april 2010 16:44
Aan: Mariëlle Nuchelmans
CC: trnsys-users@cae.wisc.edu
Onderwerp: Re: [TRNSYS-users] night ventilation, type8b

Mariëlle,
I would recommend trying with Type108 instead of Type8. You can use the 1st stage cooling setpoint as your night ventilation. You may also want to multiply the Type108 output by the result of another equation to make sure that night ventilation isn't activated during the daytime.
Best,
david

Mariëlle Nuchelmans wrote:

Hi all,

I want to model a nightventilation system with following setpoints:

Switch on when roomtemperature is 23 degrees, switch off when roomtemperature is below 19 (hysteresis)

I use type8b. But it only gives a coolsignal when I set the deadband on 0 degrees, but I should set it on 4 degrees. But then I never get a coolsignal. What am I doing wrong?

Met vriendelijke groet,

Mariëlle Nuchelmans

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