Steam is produced in the ideal cogeneration cycle, shown in Fig. 8.40, at 8 MPa and 600°C at a mass flow rate of 20 kg/s. Thirty percent of the steam is extracted from the turbine at 800 kPa and diverted to a process heater. This steam leaves the process heater at 800 kPa as a saturated liquid. The remaining steam leaves the turbine at 30 kPa, but 20% of the condenser heat transfer is used for heating and cooling buildings. S ketch this process on a T-s diagram and calculate:
i) The rate of heat input to the boiler
ii) The power output of the turbine
iii) The rate of heat removal from the process heater
iv) The heat rate used to heat and cool
v) The utilization factor for the cycle
Figure 8.40

Transcribed Image Text:

QB 8 MPa Boiler600 Turbine WT 800 kPa Pump BProcess àpH ② Fur Condenser 30 kPa-