[TRNSYS-users] Setting cool-on

[hotline]

Dear Stergiou,
 
here is a short abstract from the manual how T_COOL_ON is defined and why:
"
For the definition of the set temperature of the room air there are four options:

*	A constant set temperature of the air

*	According to DIN 1946 a floating set temperature based on ambient temperature, upper limit
	

*	According to DIN 1946 a floating set temperature based on ambient temperature (lower limit)
	

*	A user defined time-depended set value (time schedule)

Note: DIN 1946 refers to operative temperature which is not identical to the room air temperature. TRNSYSlite enables an control strategy based on room air temperature. In most cases in summer the air temperature is higher than the operative temperature because of the radiative temperature of inside surfaces of the room which has to be considered.
"
For your problem with the schedule you should define a dead band of at least 1 K for heating and cooling, this could probably help you.
 
With kind regards
Christian Frenzel

	-----Ursprüngliche Nachricht-----
	Von: Christos Stergiou [mailto:chris_s1285 at hotmail.com] 
	Gesendet: Montag, 17. September 2007 12:41
	An: Trnsys e-mail list
	Betreff: [TRNSYS-users] Setting cool-on
	
	
	Hallo,
	I would like to have some information about the equation given by the wizard in order to set the cooling system on depending on the ambient temperature. The equation given is: T_COOL_ON = MAX(MIN(27,(Input1/3+49/3)),25), where input1 is the ambient temperature.
	My question is what (Tamb+49)/3 represents and where this value is based on.
	I am trying to simulate an office building and i don't want the cooling system working during the night and during the weekends. Can you suggest me any way to achieve that?
	

	Thanks in advance,

	Stergiou Christos


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