calculate how many kWh of the output power is generated during an hour by this cycle.

A power cycle operates between two thermal reservoirs at 300 K and 800 K. The working fluid of the cycle is air, which can be considered to be an ideal gas. Specific heats are not assumed to be constant. An inventor claims that for a heat input of 250 kJ, the net work from the cycle is 80 kJ. The work generating component in the cycle is a reversible, steady state turbine. The inlet pressure and temperature are 1000 kPa and 600 K and the exit temperature is 550 K. The turbine receives 150 kJ/kg of heat from the high temperature reservoir and loses 10 kJ/kg of heat to the ambient at 298 K. (a) Prove whether or not the overall cycle is possible using second law arguments. (b) determine the work done by the turbine [kJ/kg]

Consider a variation of the Carnot cycle in a closed system with 10 kg of pure water operating. ranging between temperatures of 130 C and 350 ◦C. State 1 is a saturated liquid. Process 1-2 is a isothermal expansion with a supply of QH = 10 MJ. Process 2-3 is an adiabatic expansion with isentropic efficiency from 0.75 to minimum temperature. Process 3-4 is a compression isothermal, and the 4-1 process is a reversible adiabatic compression. Calculate: a. The pressure p2, the bonds x4 and x3, and the specific entropies s1 and s3; b. The work in each expansion and compression process; c. The heat rejected QL, the net work produced Wl i q and the yield η of the cycle; d. The entropy generated Sg in the cycle

If one measurement is conducted in the four processes and shows that the pressure ratio (P3/P2)in the adiabatic expansion is 1.2 times the pressure ratio (P4/P1) in the adiabatic compression, can you justify if it is a Carnot engine? Please give your reason