Chapter 8, Problem 8.12P

Water is the working fluid in an ideal Rankine cycle. Superheated vapor enters the turbine at 10 MPa, 480°C, and the condenser pressure is 6 kPa. Isentropic efficiencies of the turbine and pump are 84% and 73%, respectively. Determine for the cyclea. the heat transfer to the working fluid passing through the steam generator, in kJ per kg of steam flowing.b. the thermal efficiency.c. the heat transfer from the working fluid passing through the condenser to the cooling water, in kJ per kg of steam flowing.

Required information NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. The net work output and the thermal efficiency for the Carnot and the simple ideal Rankine cycles with steam as the working fluid are to be calculated and compared. Steam enters the turbine in both cases at 5 MPa as a saturated vapor, and the condenser pressure is 50 kPa. In the Rankine cycle, the condenser exit state is saturated liquid and, in the Carnot cycle, the boiler inlet state is saturated liquid. The net work output and the thermal efficiency for the Carnot and the simple ideal Rankine cycles with steam as the working fluid are to be calculated and compared. Use steam tables. The net work output in the simple ideal Rankine cycle is The thermal efficiency of the simple ideal Rankine cycle is The net work output in the Carnot cycle is kJ/kg. The thermal efficiency of the Carnot cycle is [ %. kJ/kg. %.

Water is the working fluid in an ideal Rankine cycle with reheat. Superheated vapor enters the turbine at 10 MPa, 480oC, and the condenser pressure is 6 kPa. Steam expands through the first-stage turbine to 0.7 MPa and then is reheated to 480 oC. Determine for the cycle(a) the heat addition, in kJ per kg of steam entering the first-stage turbine.(b) the thermal efficiency.(c) the heat transfer from the working fluid passing through the condenser to the cooling water, in kJ per kg of steam entering the first-stage turbine.