Ali, I think what you are describing is just a simple thermostat in cooling mode (turn something on if a temperature rises above a certain setpoint and turn it off if the temperature falls below that setpoint). You can use Type2. If you are using Trnsys17 then there is already a Type2 proforma set up to do this in Controllers: Aquastat: Cooling Mode: Type2-AquastatC. If you have Trnsys16 you can set up Type2 to do the same. Input 2 becomes the setpoint (88C) and Input 1 will be connected from the temperature of the bottom node of your tank. The upper dead band will be 1C and the lower dead band will be -1C. If you have the TESS Controllers Library, you will find models of cooling aquastats in there as well. Kind regards, David On 2/24/2014 06:56, ali shirazi wrote:
-- *************************** 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 |