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[TRNSYS-users] Problem in X2H converter - heat exchangers



Hello trnsys users,

I face a problem and I need your help.I use Rankine Cycle to simulate a real power plant.In the beginning I used the heat exchangers for steam generator(economizer,evaporator,superheater) from Stec library->Rankine but I did not get the right results so I decided to used heat exchangers from the general library (type 5b, counter flow) where the results were better. After heat exchangers in the circuit, I use a model X2H (Converter from representation p,t,x to h,p for water steam )to do the connection with the turbine stage. However the result for the enthalpy is not correct. I use superheated steam with pressure 170bar and temperature 540°C so the enthalpy must be around 3400kJ/kg but I get 2466kJ/kg. Can you tell me what is going wrong? I tested the models of exchangers alone without the other circuit to find the problem but I cannot. Furthermore, I notice that in these models there is not input for pressure in contrast with the models from Stec library.Do you have any idea what is the problem?

Thank you in advance,
Tsechelidou Christina