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Mayank, Without seeing your simulation, it is hard to know what is going wrong. A few thoughts, though (and I am assuming that you are using Type56 to model the building). 1. Make sure that you have adjusted the capacitance of your zones. The default capacitance only accounts for the capacitance of the air in the zone. Adjust the value to be about 5 times higher than the default in each of your zones in TRNBuild. 2. Make sure that you are conditioning the building using temperature level control NOT the automatic cooling type that is built into Type56. This will involve adding a VENTILATION stream to your building and a thermostat model in addition to Type921 and the blower. 3. Make sure that you are using a 1 or a 5 minute time step. TRNSYS can only make one control decision each time step. If the time step is too long, the zone will get over-cooled long before the end of the time step and the controller will try to turn off the air conditioner, which will result in the zone getting too hot. Regards, David On 12/9/2012 12:34, Mayank Bhatnagar
wrote:
Hello All, -- *************************** David BRADLEY Principal Thermal Energy Systems Specialists, LLC 22 North Carroll Street - suite 370 Madison, WI 53703 USA P:+1.608.274.2577 F:+1.608.278.1475 d.bradley@tess-inc.com http://www.tess-inc.com http://www.trnsys.com |