In a CAES for a 150-MW peaking compressor/gas turbine facility, the two-stage compressor operates with air intake at 20°C and 1 bar and air discharge at 49 bars. Air IC occurs at a pressure of 7 bars back to the intake temperature. The compressed-air storage cavern charging period duration is 5 h. The HP portion of the gas turbine operates with a CC that burns natural gas with an HV of 50 MJ/kg; thereby, the compressed-air temperature increases to 1100°C. After expansion in the HP part of the turbine to a pressure of 7 bars, the gas is reheated to 1100°C. Subsequently, the air expands in the LP part of the turbine to the pressure of 1 bar. The isentropic efficiencies of compressor and turbine are 0.86 and 0.89, respectively. The isobaric specific heat of air/gas is 1.05 kJ/(kg K), the isentropic exponent k is 1.4. Determine (a) the total fuel consumption rate of combustor and reheater, (b) the storage cavern volume, and (c) the average air flow rate during the 5-h cavern charging period
In a CAES for a 150-MW peaking compressor/gas turbine facility, the two-stage compressor operates with air intake at 20°C and 1 bar and air discharge at 49 bars. Air IC occurs at a pressure of 7 bars back to the intake temperature. The compressed-air storage cavern charging period duration is 5 h. The HP portion of the gas turbine operates with a CC that burns natural gas with an HV of 50 MJ/kg; thereby, the compressed-air temperature increases to 1100°C. After expansion in the HP part of the turbine to a pressure of 7 bars, the gas is reheated to 1100°C. Subsequently, the air expands in the LP part of the turbine to the pressure of 1 bar. The isentropic efficiencies of compressor and turbine are 0.86 and 0.89, respectively. The isobaric specific heat of air/gas is 1.05 kJ/(kg K), the isentropic exponent k is 1.4. Determine (a) the total fuel consumption rate of combustor and reheater, (b) the storage cavern volume, and (c) the average air flow rate during the 5-h cavern charging period.
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