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Title: Calculation of brine properties. [Above 80/sup 0/F and for salt content between 5 and 25%]

Calculation of brine properties. [Above 80/sup 0/F and for salt content between 5 and 25%] Simple analytical expressions are presented for estimating geothermal brine thermophysical properties above 80/sup 0/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.
Authors:
Publication Date:
OSTI Identifier:7111583
Report Number(s):UCID-17406
DOE Contract Number:W-7405-ENG-48
Resource Type:Technical Report
Research Org:California Univ., Livermore (USA). Lawrence Livermore Lab.
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; MAXIMUM-LIKELIHOOD FIT; NUMERICAL SOLUTION Geothermal Legacy 152001* -- Geothermal Data & Theory-- Properties of Aqueous Solutions