Calculation of brine properties
Abstract
Simple analytical expressions are presented for estimating geothermal brine thermophysical properties above 80°F and for salt contents between 5 and 25 percent by weight. Linear regression by the method of least squares is used to curvefit saturated liquid enthalpy and density data on simulated brines. Brine saturation pressure is calculated as a percentage of the pure water saturation pressure at the same temperature. Saturated liquid brine entropy is determined from an approximation to the differential equation for entropy change using the previously determined relationships for the other property values needed. Brine vapor properties are assumed equal to steam properties at the same temperature and pressure and are obtained from the ASME equationofstate for pure water.
 Authors:

 Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
 Publication Date:
 Research Org.:
 Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
 Sponsoring Org.:
 USDOE
 OSTI Identifier:
 7111583
 Report Number(s):
 UCID17406
 DOE Contract Number:
 W7405ENG48
 Resource Type:
 Technical Report
 Country of Publication:
 United States
 Language:
 English
 Subject:
 15 GEOTHERMAL ENERGY; BRINES; PHYSICAL PROPERTIES; THERMODYNAMIC PROPERTIES; GEOTHERMAL FLUIDS; ANALYTICAL SOLUTION; DENSITY; ENTHALPY; ENTROPY; EQUATIONS OF STATE; LEAST SQUARE FIT; PRESSURE DEPENDENCE; SATURATION; STEAM; TEMPERATURE DEPENDENCE; VAPORS; EQUATIONS; FLUIDS; GASES; MAXIMUMLIKELIHOOD FIT; NUMERICAL SOLUTION; Geothermal Legacy; 152001*  Geothermal Data & Theory Properties of Aqueous Solutions
Citation Formats
Dittman, Gerald L. Calculation of brine properties. United States: N. p., 1977.
Web. doi:10.2172/7111583.
Dittman, Gerald L. Calculation of brine properties. United States. doi:10.2172/7111583.
Dittman, Gerald L. Wed .
"Calculation of brine properties". United States. doi:10.2172/7111583. https://www.osti.gov/servlets/purl/7111583.
@article{osti_7111583,
title = {Calculation of brine properties},
author = {Dittman, Gerald L.},
abstractNote = {Simple analytical expressions are presented for estimating geothermal brine thermophysical properties above 80°F and for salt contents between 5 and 25 percent by weight. Linear regression by the method of least squares is used to curvefit saturated liquid enthalpy and density data on simulated brines. Brine saturation pressure is calculated as a percentage of the pure water saturation pressure at the same temperature. Saturated liquid brine entropy is determined from an approximation to the differential equation for entropy change using the previously determined relationships for the other property values needed. Brine vapor properties are assumed equal to steam properties at the same temperature and pressure and are obtained from the ASME equationofstate for pure water.},
doi = {10.2172/7111583},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1977},
month = {2}
}