Water is the working fluid in a
Water is the working fluid in a cogeneration cycle that generates electricity and provides heat for campus buildings. Steam at 2 MPa, 300 oC, enters a two-stage turbine with a mass flow rate of 0.80 kg/s. A fraction of the total flow, 0.15, is extracted between the two stages at 0.15 MPa to provide for building heating, and the remainder expands through the second stage to the condenser pressure of 7 kPa. Condensate returns from the campus buildings and passes through a trap into the condenser, where it is reunited with the main feedwater flow. Saturated liquid leaves the condenser at 7 kPa. Both turbine and pump are considered isentropic. Determine, in kW:
(a) the rate of heat transfer to the working fluid passing through the steam generator;
(b) the rate of heat transfer for building heating; and
(d) the % utilization factor.
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