Thermodynamic Properties of Geothermal Fluids

Abstract

The modeling of the geothermal well reservoir system and plant design makes it necessary to use the thermodynamic properties of the geothermal fluids. Such properties for salt solutions may be found in tabular form. The increasing use of computers for the prediction of the state of the fluid at the wellhead requires the use of simpler and accurate functional expressions for the properties of the salt solutions. For that matter, correlations of density, enthalpy, entropy and viscosity were established in a simpler form and of tolerable accurate (3%) for both the liquid and vapor phase of the brines. Expressions for the elevation of boiling point are derive and the influence of non-condensable gases on the properties is also discussed.