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REFLEAK: NIST Leak/Recharge Simulation Program for Refrigerant Mixtures. Version 3.1. User's Guide.



Piotr A. Domanski, David Didion, Min S. Kim


REFLEAK estimates composition changes of zeotropic mixtures in leak and recharge processes. The leak/recharge simulation program consists of three parts: 1) the pre-processing section for inputting required data, 2) the computation section which simulates leak/recharge processes and, 3) the post-processing section to display calculated results and to print or store data and graphs. Calculated vapor and liquid compositions are displayed in a graphic format. Additional tabular data includes temperature, pressure, volumetric quality, liquid specific volume and vapor specific volume for each 1% of mass leaked throughout the process. Output data can be saved and printed. Thermodynamic properties of refrigerant mixtures are calculated based upon the widely-used NIST Standard Reference Database 23 - NIST Reference Fluid Thermodynamic and Transport Properties Database: REFPROP Version 7.0. A user manual and help section is included.
Natl Std. Ref. Data Series (NIST NSRDS) - 73
Report Number


databases, refirgerants, mixtures, simulation, installing, leakage, ozone, thermodynamic properties, chemical leak, fractionation, zeotropic mixtures


Domanski, P. , Didion, D. and Kim, M. (2007), REFLEAK: NIST Leak/Recharge Simulation Program for Refrigerant Mixtures. Version 3.1. User's Guide., Natl Std. Ref. Data Series (NIST NSRDS), National Institute of Standards and Technology, Gaithersburg, MD, [online], (Accessed July 21, 2024)


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Created November 1, 2007, Updated November 10, 2018