Determination of the optimum parameters of a geothermal steam turbine installation

The paper proposes a method for determining optimal parameters of the steam turbine installation cycle of a geothermal power plant, taking into account the well characteristics of a specific geothermal field. It considers the single-circuit thermal circuits of a steam turbine installation in the absence and presence of the intermediate steam input into a turbine. The geothermal installation thermal efficiency is analyzed at various values of steam pressure at the input to the turbine and condenser. It is shown that, providing stable operation of the well increases the initial steam pressure in the steam turbine installation cycle and has a beneficial effect on the geothermal power plant appearance. For the single-circuit schemes, the initial steam pressure is determined by the turbine maximum specific work obtained taking into account alteration in the steam pressure at the wellhead, which depends on its flow rate. It was established that for a steam turbine installation without intermediate steam input into the turbine of the geothermal power plant of the Mutnovskoye field, the optimal initial pressure of the steam-water working fluid was 6–8 atm.
EDN: WJBPNX, https://elibrary/wjbpnx

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