ISO 17584:2022

Overview

ISO 17584:2022 - Refrigerant properties - defines standard thermophysical data and calculation methods for commonly used refrigerants and refrigerant blends. The document specifies equations of state and numerical parameters to determine key refrigerant properties (density, pressure, internal energy, enthalpy, entropy, Cp, Cv, speed of sound, Joule–Thomson coefficient) in single-phase conditions and along the liquid–vapour saturation boundary. Covered fluids include R12, R22, R32, R123, R125, R134a, R143a, R152a, R290, R600a, R717 (ammonia), R744 (CO2), R1233zd(E), R1336mzz(Z), R1234yf, R1234ze(E) and blends R404A, R407C, R410A, R507A. Numerical refrigerant designations follow ISO 817.

Key topics and technical requirements

• Equations of state: Prescribed pure-fluid and mixture formulations, with coefficients and exponents for each refrigerant.
• Thermophysical properties: Standardized methods to calculate density, enthalpy, entropy, internal energy, Cp, Cv, speed of sound, and Joule–Thomson coefficient.
• Saturation boundary: Property values and behavior along liquid–vapour equilibrium are specified.
• Mixture handling: Interaction parameters and excess function terms for refrigerant blends (e.g., R404A, R407C, R410A, R507A).
• Implementation requirements: Annex A sets out normative requirements for implementing equations of state; Annexes B and C provide informative calculation procedures for pure fluids and mixtures, and Annex D lists verification literature.
• Verification and testing: The standard includes guidance to test software implementations against defined verification values and ranges of validity for each refrigerant.
• Regulatory notes: Identifies refrigerants controlled under the Montreal Protocol (e.g., R12, R22, R123, and certain blends).

Applications and users

ISO 17584:2022 is intended for professionals and organizations that require accurate, standardized refrigerant data:

• HVACR system designers and OEMs for performance modelling and heat‑pump/refrigeration design
• Simulation and CAE software developers (thermodynamic libraries)
• Test labs performing calorimetry, performance verification, and component testing
• Researchers working on refrigerant selection, lifecycle impact, and low-GWP alternatives
• Regulatory and standards bodies needing traceable refrigerant property references

Practical uses include refrigerant selection and comparison, cycle simulation (COP, capacity), transcritical CO2 system modelling, and safety/pressure vessel calculations.

Related standards

• ISO 817 - Refrigerants - Designation system
• Montreal Protocol provisions (control listings noted in the standard)
• Other thermodynamic reference standards and national guidelines used for refrigerant testing and validation

Keywords: ISO 17584:2022, refrigerant properties, thermophysical properties, equations of state, refrigerant blends, HVACR, R744, R1234yf.