Plant capacity factor CF = 0.95 Calculate: (a) the plant net specific work, (b) the plant thermal efficiency, (c) the plant overall (electrical) efficiency, (d) the plant steam rate, (e) the plant annual power generation, and (e) the plant rate of heat rejection.
A dry steam geothermal power plant is operating on the Rankine cycle under the following conditions:
• Plant electric power output Pel = 64 MW
• Dry saturated steam pressure at the turbine inlet p1 = 40 bars
• Pressure and dryness fraction of wet saturated steam at turbine exit: p2 = 0.05 bar and x2s = 0.7 (after isentropic expansion)
• Direct contact condenser pressure p2 = 0.05 bar
• Turbine isentropic efficiency ηit = 0.92
• Combined
• Plant capacity factor CF = 0.95
Calculate:
(a) the plant net specific work,
(b) the plant thermal efficiency,
(c) the plant overall (electrical) efficiency,
(d) the plant steam rate,
(e) the plant annual power generation, and
(e) the plant rate of heat rejection. Ignore work of the feed pump.
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