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3.8 Thermal Scheduling with Straight-Line Segments for Input-Output Curves The following data apply to three thermal units. Compute and sketch the input- output characteristics and the IHR characteristics. Assume the unit input-output curves consist of straight-line segments between the given power points. Unit No. 1 2 Power Output (MW) 45 300 350 45 200 300 350 47.5 200 300 450 Net Heat Rate (Btu/kWh) 13,512.5 9,900.0 9,918.0 22,764.5 11,465.0 11,060.0 11,117.9 16,039.8 10,000.0 9,583.3 9,513.9 3 Fuel costs are Unit No. Fuel Cost ($/MBtu) 1 2 3 0.61 0.75 0.75 Compute the economic schedule for system demands of 300, 460, 500, and 650 MW, assuming all three units are on-line. Give unit loadings and costs per hour as well as total costs in $ per hour. 3.8 Thermal Scheduling with Straight-Line Segments for Input-Output Curves The following data apply to three thermal units. Compute and sketch the input- output characteristics and the IHR characteristics. Assume the unit input-output curves consist of straight-line segments between the given power points. Unit No. 1 2 Power Output (MW) 45 300 350 45 200 300 350 47.5 200 300 450 Net Heat Rate (Btu/kWh) 13,512.5 9,900.0 9,918.0 22,764.5 11,465.0 11,060.0 11,117.9 16,039.8 10,000.0 9,583.3 9,513.9 3 Fuel costs are Unit No. Fuel Cost ($/MBtu) 1 2 3 0.61 0.75 0.75 Compute the economic schedule for system demands of 300, 460, 500, and 650 MW, assuming all three units are on-line. Give unit loadings and costs per hour as well as total costs in $ per hour