Calculation of brine properties
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.
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- Resource Type:
- Technical Report
- Research Org:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
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- Country of Publication:
- United States
- 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
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