NIST Database error

- July 3, 2019 at 11:23 am
  
  jeevan
  Subscriber
  
  Hi,
  
  We currently researching on supercritical co2 in heat exchangers.
  
  once we import the "co2.fld" file and try to start the itteration we get a error saying
  
  ""
  
  Error at Node 0: REFPROP_error (203) from function: tprho (density)
  
  [TPRHO error 203] vapor iteration has not converged for T = 299.70 K, P = 7.2750 MPa, rho (last guess) = 7.1299 mol/L, x (mol frac) = 1.00000
  
  ""
  
  can anyone help ?
  
  Thank you
- July 11, 2019 at 4:45 pm
  
  DrAmine
  Ansys Employee
  
  Can you please add more information about release operating and boundary conditions?
- November 30, 2019 at 9:22 am
  
  alilozoro1
  Subscriber
  
  Hi,
  
  I have the same issue when use the NIST database for r134a, but i solve this problem by limit the minimum temperature to 273.15 k.
  
  i hope that help you.
  
  best regards,

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