Analyzing Regenerative Cycles
Steam enters the first turbine stage of a vapor power plant with reheat and regeneration at 1800 lbf/in.2, 1100°F and expands in five stages to a condenser pressure of 1 lbf/in.2 Reheat is at 100 lbf/in.2 to 1000°F. The cycle includes three feedwater heaters. Closed heaters operate at 600 and 160 lbf/in.2, with the drains from each trapped into the next lower-pressure feedwater heater. The feedwater leaving each closed heater is at the saturation temperature corresponding to the extraction pressure. An open feedwater heater operates at 20 lbf/in.2 The pumps operate isentropically, and each turbine stage has an isentropic efficiency of 88%.
(a) Sketch the layout of the cycle and number the principal state points.
(b) Determine the thermal efficiency of the cycle.
(c) Determine the heat rate, in Btu/kW · h.
(d) Calculate the mass flow rate into the first turbine stage, in lb/h, for a net power output of 3 × 109 Btu/h.
We need at least 10 more requests to produce the solution.
0 / 10 have requested this problem solution
The more requests, the faster the answer.