An air standard gas turbine engine operates on an overall pressure ratio of 4 and between the temperature limits of 70 F and 1600 F. Assuming constant specific heats, evaluate the compressor work. The efficiencies of compressor and turbine are 0.82 and 0.92, respectively. (a) Assuming constant specific heats, evaluate the compressor work. (b) determine the turbine work (c) determine the thermal efficiencies

A steady-flow system operating on the ideal Ericsson cycle can achieve the Carnot efficiency. One of the salient features of this cycle is the isothermal expansion through a heated turbine, as shown in Fig. a. Heat is added to the turbine such that the outlet temperature is equal to the inlet temperature, i.e. T₁=T₂, and the overall pressure ratio for this process is rₚ=P₁/P₂. However, an isothermal expansion through a heated turbine is very difficult to achieve in practical engineering applications. An alternate approach is two use a multi-stage expansion process with reheating. In this approach, the gas expansion process is carried out in multiple stages with reheating in between each stage. Consider the two-stage turbine expansion with reheating shown in Fig. b. The gas enters the first stage of the turbine at state A1, is expanded isentropically to an intermediate pressure Pₐ₂, is reheated at constant pressure to state B1, and is expanded in the second stage isentropically to the…

In a constant volume cycle, the pressure at the end of compression is 10 times that at the start, the temperature limits are 20 ° C and 1900 ° C. Determine i. Compression ratio, ii. Thermal efficiency and iii. Work done. Take R = 287 J/kg K, y = 1.4