To control the power output of an isentropic steam turbine, a throttle valve is placed in the steam line supplying the turbine inlet, as shown in the figure. Steam at 6 MPa and 4008C is supplied to the throttle inlet, and the turbine exhaust pressure is set at 70 kPa. Compare the work produced by this steam turbine, in kJ/kg, when the throttle valve is completely open (so that there is no pressure loss) and when it is partially closed so that the pressure at the turbine inlet is 3 MPa.
Quality Control Thomas R. Huston, PhD, PE 513-556-2645 (UC Office) tom.huston@uc.edu (email) 2Thomas R. Huston, Ph.D., P.E. 1 Engineering • Creative application of scientific principles for practical purposes • Engineers design and develop • Products • Structures • Machines and devices • Systems • Processes Thomas R. Huston, Ph.D., P.E. 2 Engineering • Engineers must address: – Alternatives – Constraints • Customer needs • Productivity • Costs – Quality 2Thomas R. Huston, Ph.D., P.E. 3 Management • Coordinating human efforts and allocating resources to reach specific goals such as q
