Physical Chemistry of Aqueous Systems: Meeting the Needs of Industry

ISBN Print: 978-1-56700-034-4

ISBN Online: 978-1-56700-445-8

STANDARD THERMOPHYSICAL PROPERTIES OF THE AMMONIA-WATER BINARY FLUID

DOI: 10.1615/ICPWS-1994.1070
pages 854-861

要約

Mixtures of ammonia and water have become important as working fluids in alternative power cycles, as well as having a role in the refrigeration industry. Accurate properties of this system are critical in the development and optimization of efficient processes. There are currently no accurate correlations which are widely available and cover the broad range of parameters of interest to the industrial and scientific communities. Our initial efforts are restricted to thermodynamic properties of ammonia-rich fluids for temperatures up to 450 K and pressures to 3.5 MPa, which covers the range for geothermal applications. The longer term goal of this project is to provide properties, including viscosity and thermal conductivity, in a much larger range of temperature and pressure over the entire composition range. The preliminary thermodynamic formulation discussed in this report is based on an extended corresponding states (ECS) model with shape factors calculated from standard reference formulations for each of the pure fluids. The final optimization of the correlation awaits the completion of a related experimental program.