Re: constant temperature unwanted

[David Bradley <bradley@xxxxxxxxxxxx>]

Dear Arko,
  Type56 and most of the other building models are set up to allow simulation of two different things. First, you can obtain the building loads - meaning that TRNSYS computes the amount of energy that must be added to or removed from a space in order to maintain a set point temperature. As soon as you define a setpoint, the building models will not allow the zone temperatures to go above (in the case of a cooling setpoint) or below (in the case of heating) that point. Instead, they will report how much energy was required to maintain that temperature. Essentially you are defining some ideal heating and cooling equipment for the building. The zone temperature will float between the two setpoints. If you want the building temperature to float without bounds, then you can either make the setpoints very high for cooling and very low for heating (insuring that the equipment will never turn on) or, you can turn off heating and cooling in Prebid and define your system externally.
Cheers,
  David

At 06:39 AM 9/9/2002 -0700, you wrote:



Dear Trnsys users,

I try to simulate an air heating and cooling system in a building. (Type 56) It has good u-values and 4 Zones. Convective Part of heating system is 100%.

I made an Input for the set point (20 Wintertime, 26 Summertime) of the Zone temperature and connected it to Equation/Type 14. What I do not understand is, that the temperature in this building is exact on the desired setpoint temperature. Usually it should not be that, because walls store energy and the dead Band is 2 Kelvin. Why is there no thermal behavior of that building?  

Thank you for consideration, I hope to hear from anybody soon.

Arko K

PS 

Also, I would like to know which Type is the best for a simulation of a PAC-unit.



Do You Yahoo!?
Yahoo! Finance - Get real-time stock quotes 

********************************************************************************* 
Thermal Energy System Specialists (TESS) 
David BRADLEY                           2916 Marketplace Drive - Suite 104 
Project Engineer                           Madison, WI 53719 
Phone: (608) 274-2577 USA 
Fax: (608) 278-1475 
E-mail: bradley@tess-inc.com 
Web Page:          www.tess-inc.com

"Providing software solutions for today's energy engineering projects" 
**************************************************************************** *****