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Ravinda, There is a pressure reducing valve component in the TESS CHP library. It is typically used in steam applications and assumes steam as the working fluid. Typically we do not model refrigeration systems at the heat exchanger / compressor / expansion valve level but take the whole cycle as a component. The time constant of the transient behavior within the refrigeration cycle is so small that a typical TRNSYS time step (1-5 minutes in the kind of systems that we work with) that the refrigeration loop can be seen as steady state. We therefore assign a COP that is dependent on the external inlet conditions (such as temperature and humidity of the air on the condenser and evaporator sides). kind regards, David
On 12/19/2017 04:19, v ravindra via
TRNSYS-users 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 |