Chapter 7, Problem 7.10E

An ideal air-standard Brayton cycle operating at steady state produces 50 MW of power. Operating data at principal states in the cycle are given in the table below. The states are numbered as in the figure below. State p (kPa) T(K) h (kJ/kg) 1 100 300 300 2 1000 574.1 579.7 3 1000 1800 2002 4 100 1034 1085 Heat exchanger W ycle Compressor Turbine 3 Heat exchanger Qout Determine: (a) the mass flow rate of air, in kg/s. (b) the rate of heat transfer, in kW, to the working fluid passing through the heat exchanger. (c) the percent thermal efficiency.

Determine:(a) the cutoff ratio.(b) the heat addition per unit mass, in kJ/kg.(c) the net work per unit mass, in kJ/kg.(d) the percent thermal efficiency.

3. In what way does the atmospheric condition affects the performance of the engine? Give examples.

13) An ideal air-standard Brayton cycle operating at steady state produces 50 MW of power. Operating data at principal states in the cycle are given in the table below. The states are numbered as in the figure below.   Determine:(a) the mass flow rate of air, in kg/s.(b) the rate of heat transfer, in kW, to the working fluid passing through the heat exchanger.(c) the percent thermal efficiency.

In reciprocating engines, primary forces are, a. completely balanced b. partially balanced, c. balanced by secondary forces, d. cannot be balanced,

(a)Based on the schematic shown in the diagram, list five examples of irreversibility that are evident in the system.  For each irreversibility, state the device where the irreversibility occurs, and the evidence for the existence of the irreversibility.  (b)Would adding a regenerator to this system improve performance? Why or why not?

How does an external combustion engine works?

Thermodynamic

Engine pressure ratio in a turbojet engine is the ratio between the fan and turbine outlet integrated pressure and the compressor outlet pressure fan outlet to fan inlet pressure turbine outlet pressure and compressor inlet pressure