Rework Problem 8.46 assuming that the total steam mass flow rate is 60 lbm/s and that the steam is reheated back to 900°F at 300 psia. The specific quantities will change to rates.
Steam leaves the boiler of the ideal cogeneration cycle shown in Fig. 8.41 at 600 psia and 900°F. Forty percent of the steam flow is extracted from the turbine by a process heater at 300 psia. The remaining 60% leaves the turbine at 5 psia. Assume the turbine and pumps to have 100% efficiencies. Sketch this process on a T-s diagram and calculate:
i) The specific heat addition in the steam generator
ii) The net specific pwork output of the turbine
iii) The specific heat removal in the process heater
iv) The specific heat removal in the condenser
v) The utilization factor for the cycle
Figure 8.41

Transcribed Image Text:

9B 600 psia 900 F Boiler Turbin-→ 300 psia B Process PH heater Pump B Pump A。 Condenser 5 psia qc