ISO 17584:2005 pdf download.Refrigerant properties.
3.8
thermodynamic properties
density, pressure, fugacity. internal energy. enthaipy, entropy, Gibbs and Helmhoitz energies, heat capacities. speed of sound. and the Joule-Thomson coefficient, In both single-phase states and along the liquid-vapour saturation boundary
3.9
thermophysical properties
all of the thermodynamic, transport, and other miscellaneous properties
3.10
triple point
state at which solid, liquid, and vapour phases of a substance are in thermodynamic equilibrium
4 Calculation of refrigerant properties
4.1 General
This International Standard specifies properties for the refrigerants listed in Clause 1. These properties are denved from expenmental measurements. It is not practical, however, to directly reference the experimental data; they may not be available at all conditions of Interest and some properties, such as entropy, cannot be measured directly. Furthermore, a simple tabulation, even for properties (such as vapour pressure) that are directly measurable, is not convenient for modern engineering use. Thus, some means to correlate the data is required to allow calculation of the properties at a desired thermodynamic state.
The properties enumerated in this International Standard are calcutated from specified equations of state. although alternative algorithms are allowed. The properties themselves constitute this International Standard. The equations of state serve as a convenient means to represent and reproduce the properties. The properties enumerated ii the tables in this International Standard thus represent only a subset of the properties specified by this International Standard: the full range of conditions is given for each fluid in Clause 5.
thermodynamic properties
density, pressure, fugacity. internal energy. enthaipy, entropy, Gibbs and Helmhoitz energies, heat capacities. speed of sound. and the Joule-Thomson coefficient, In both single-phase states and along the liquid-vapour saturation boundary
3.9
thermophysical properties
all of the thermodynamic, transport, and other miscellaneous properties
3.10
triple point
state at which solid, liquid, and vapour phases of a substance are in thermodynamic equilibrium
4 Calculation of refrigerant properties
4.1 General
This International Standard specifies properties for the refrigerants listed in Clause 1. These properties are denved from expenmental measurements. It is not practical, however, to directly reference the experimental data; they may not be available at all conditions of Interest and some properties, such as entropy, cannot be measured directly. Furthermore, a simple tabulation, even for properties (such as vapour pressure) that are directly measurable, is not convenient for modern engineering use. Thus, some means to correlate the data is required to allow calculation of the properties at a desired thermodynamic state.
The properties enumerated in this International Standard are calcutated from specified equations of state. although alternative algorithms are allowed. The properties themselves constitute this International Standard. The equations of state serve as a convenient means to represent and reproduce the properties. The properties enumerated ii the tables in this International Standard thus represent only a subset of the properties specified by this International Standard: the full range of conditions is given for each fluid in Clause 5.
