Calculation of brine properties

Technical Report · Wed Feb 16 00:00:00 EST 1977

DOI:https://doi.org/10.2172/7111583· OSTI ID:7111583

Dittman, Gerald L. ^[1]

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1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

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 curve-fit 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 equation-of-state for pure water.

• Research Organization: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 7111583
• Report Number(s): UCID-17406
• Country of Publication: United States
• Language: English

Related Subjects

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
MAXIMUM-LIKELIHOOD FIT
NUMERICAL SOLUTION
Geothermal Legacy
152001* - Geothermal Data & Theory- Properties of Aqueous Solutions