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

[Christina Tsechelidou]

 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