A flashed steam geothermal power plant has pressurized underground water available at 102 kg/cm2 and 240°C. In order to produce steam-water mixture, the ground water is passed and throttled to 5.4 kg/cm2 in a steam separator. The dry steam produced in the separator is fed to double flow impulse and reaction turbine with efficiency of 85%. The turbine is directly coupled to a 3 phase, 60 Hz, 80% power factor, 13800V air cooled generator. Exhaust is to be direct contact spray type main condenser designed to operate a vacuum of 647.5 mm of Hg. Generator efficiency is 95%, ground water is 459 kg/s. (a) What is the actual power generated by the plant in MW? (b) What is the mass flow rate of steam? (c) How many cubic meters per hour of fresh water that must be supplied to the main condenser if water from cooling water enters the condenser at 35°C and leaves at 48°C? (d) How many production wells are needed to supply the plant with pressurized water if each well has a capacity of 127200 kg/h? e) Determine the thermal efficiency of the Geothermal Power plant.
A flashed steam geothermal power plant has pressurized underground water available at 102 kg/cm2 and 240°C. In order to produce steam-water mixture, the ground water is passed and throttled to 5.4 kg/cm2 in a steam separator. The dry steam produced in the separator is fed to double flow impulse and reaction turbine with efficiency of 85%. The turbine is directly coupled to a 3 phase, 60 Hz, 80% power factor, 13800V air cooled generator. Exhaust is to be direct contact spray type main condenser designed to operate a vacuum of 647.5 mm of Hg. Generator efficiency is 95%, ground water is 459 kg/s.
(a) What is the actual power generated by the plant in MW?
(b) What is the mass flow rate of steam?
(c) How many cubic meters per hour of fresh water that must be supplied to the main condenser if water from cooling water enters the condenser at 35°C and leaves at 48°C?
(d) How many production wells are needed to supply the plant with pressurized water if each well has a capacity of 127200 kg/h?
e) Determine the thermal efficiency of the Geothermal Power plant.
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