lib.mEoS.R32
============

Fluid info
----------

* CAS Number: 75-10-5
* Formula: CH2F2
* Synonym: R32
* Molecular weigth: 52.024 g/mol
* Tc:  351.2550 K
* Pc:  5.7820 MPa
* ρc:  424.0000 kg/m³
* Tt:  136.3400 K
* Tb:  221.4990 K
* Acentric factor: 0.2769
* Dipole moment:  1.9780 Debye

Equation of state
-----------------

* Tillner-Roth, R., Yokozeki, A.; An International Standard Equation of State for Difluoromethane (R-32) for Temperatures from the Triple Point at 136.34 K to 435 K at Pressures up to 70 MPa. J. Phys. Chem. Ref. Data 26(6) (1997) 1273-1328, http://dx.doi.org/10.1063/1.556002
* Outcalt, S.L., McLinden, M.O.; Equations of State for the Thermodynamic Properties of R32 (Difluoromethane) and R125 (Pentafluoroethane). Int. J. Thermophysics 16(1) (1995) 79-89., http://dx.doi.org/10.1007/BF01438959
* Span, R., Wagner, W.; Equations of State for Technical Applications. III. Results for Polar Fluids. Int. J. Thermophys., 24(1) (2003) 111-162, http://dx.doi.org/10.1023/A:1022362231796
* Astina, I.M., Sato, H.; A Rational Helmholtz Fundamental Equation of State for Difluoromethane with an Intermolecular Potential Background. Int. J. Thermophys. 24(4) (2003) 963-990, http://dx.doi.org/10.1023/A:1025096716493
* Vasserman A.A., Fominsky D.V.; Equations of State for the Ozone-Safe Refrigerants R32 and R125. Int. J. Thermophysics 22(4) (2001) 1089-1098, http://dx.doi.org/10.1023/a_1010699806169
* Sun, L., Ely, J.F.; Universal equation of state for engineering application: Algorithm and  application to non-polar and polar fluids. Fluid Phase Equilib., 222-223 (2004) 107-118, http://dx.doi.org/10.1016/j.fluid.2004.06.028


Viscosity
---------

* Huber, M.L., Laesecke, A., Perkins, R.A.; Model for the Viscosity and Thermal Conductivity of Refrigerants, Including a New Correlation for the Viscosity of R134a. Ind. Eng. Chem. Res., 42(13) (2003) 3163-3178, http://dx.doi.org/10.1021/ie0300880

Thermal Conductivity
--------------------

* Huber, M.L., Laesecke, A., Perkins, R.A.; Model for the Viscosity and Thermal Conductivity of Refrigerants, Including a New Correlation for the Viscosity of R134a. Ind. Eng. Chem. Res., 42(13) (2003) 3163-3178, http://dx.doi.org/10.1021/ie0300880


Calculation example
-------------------

Using the first option for equation of state, we can get this diagram plots with the liquid-gas saturation region:

.. image:: images/R32.png

The diagram is generated with :download:`this module <../.script/plotMEoS.py>` running with the compound name as parameter or edited in file

.. code-block:: bash

    python3 plotMEoS.py R32