Chapter 8, Problem 8.7CU

Q2. A gas turbine operates between pressures of 3 and 9 bar with a minimum and maximum cycle temperatures of 40 "C and 1500 °C. Both the compressor and turbine have isentropic efficiencies of 92%. The mass flow rate through the turbine is 0.4 kg/s. (a) 1. Sketch the ideal cycle on a T-s diagram including labels for: the different states (using the numbering in Figure Q2), heat and work transfers, as well as the pressure and temperature values given above. And add the curves and appropriate labels that show the effect of irreversible processes. ii. Starting from the relationship between pressure and volume for an ideal gas undergoing an isentropic process, and the ideal gas equation (both in Table 2), demonstrate the relationship between temperatures and pressures (Eq. Q2). T2 (Eq. Q2) Where: y is the ratio for specific heat, and 1 and 2 are the initial and final states. iii. Write down the equations for the isentropic efficiencies of the compressor and turbine as a function of the…

Brayton cycle used for gas turbine in aircraft consists of the following operations in sequence, O a. Isentropic compression, isobaric heat supply, isobaric expansion O b. isentropic compression, isobaric heat supply, isentropic expansion. C. Isentropic compression, isentropic heat supply, isobaric expansion d. Isentropic compression, isobaric heat supply, isochoric expansion For an engine the maximuum wark ahtained under ideal conditions is on W and artua

712. Which of the following is/are the process/es that cannot be found in a carnot cycle? a. isobaric compression b. isobaric expansion c. adiabatic expansion d. isothermal compression e. isothermal expansion  f. adiabatic compression