Nist Refprop 9

Unlike simpler models (like Ideal Gas or Peng-Robinson), REFPROP 9 uses complex Helmholtz energy equations. This provides an accuracy that often matches or exceeds experimental data, especially near critical points. 2. Comprehensive Fluid Database

Water, air, and various siloxanes used in organic Rankine cycles. Mixture Calculations nist refprop 9

Includes refrigerants (HFCs, CFCs, HFOs), hydrocarbons, natural gases, cryogens, and standard substances like water, air, and ammonia. Calculated Properties: Thermodynamic: Unlike simpler models (like Ideal Gas or Peng-Robinson),