The experiments on researching of physical and chemical characteristics of hydrothermal heat carrier of Verhne-Mutnovskaya geothermal electric power station and wells 4E, 014 of Mutnovskoyoe field were carried out. The concentrations of cations and anions, pH, mineralization, ionic strength, conductivity of separate and vapor condensate solutions, concentration of gases in vapor phase of heat carrier were determined. Coefficients in linear dependence of ionic strength from solution mineralization for separate and condensate were established. The dependence of separate conductivity from solution temperature was investigated.

The experimental data and theoretical values of conductivity were compared. The sizes and diffusion coefficients of colloidal silica particles were measured by the method of photon correlation spectroscopy. The results obtained in this work can be applied for development of technology of silica extraction and increasing of efficiency of hydrothermal heat carrier using.

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