Chapter 7, Problem 7.31P

Water vapor enters a turbine with a mass flow of 2kg / h, 6 MPa pressure, 500 ° C temperature and 40 m / s velocity and exits with 300 kPa pressure, 200 ° C and 100 m / s velocity. 200 W heat transfer is made to the environment from the turbine with a surface temperature of 150 ° C.Note: Take T (K) = 273.15 + ◦C and ambient temperature 25◦C.a) Find the power of the turbine, (kW).b) Find the amount of entropy produced in the turbine, (kW / K).c) Find the exergy (kW) of the turbine at the exit conditions.d) Find the second-law efficiency (exergy efficiency) of the turbine.e) Find the exergy (kW) destroyed in the turbine.

Thermodynamics need a cancellation of units

In turbochargers a turbine is directly connected to a compressor. The power harvested by the turbine is used to power the compressor. In the figure below a turbine runs on steam and powers a compressor on air. Air can be considered a perfect gas with k = 1.34, R = 0.28 kJ/kgk and Cp 1.02 kJ/kgK. The air enters the compressor at p₁ 1bar, T₁ 300K and a mass flow rate of mdot = 5.9 kg/s and exits at p2 = 5.2 bars. The steam enters the isentropic turbine at P3 = 2 MPa, T3 = 320°C and exits at p4 = 100 kPa. = 9 State 2 Isentropic Compressor State 1 Air - perfect gas T₁ = 300K P₁ = 1 bar Answer: tubine = ? State 4 Isentropic Turbine State 3 Steam T, 320°C P3= 2MPa = What is the entropy at state 3? Please enter your answers in kJ/kgK

In turbochargers a turbine is directly connected to a compressor. The power harvested by the turbine is used to power the compressor. In the figure below a turbine runs on steam and powers a compressor on air. Air can be considered a perfect gas with k = 1.34, R = 0.28 kJ/kgk and Cp 1.02 kJ/kgK. The air enters the compressor at p₁ 1bar, T₁ 300K and a mass flow rate of mdot = 5.9 kg/s and exits at p2 = 5.2 bars. The steam enters the isentropic turbine at P3 = 2 MPa, T3 = 320°C and exits at p4 = 100 kPa. = State 2 Isentropic Compressor State 1 Air-perfect gas T₁ = 300K P₁ = 1 bar W = ? tubine Answer: State 4 Isentropic Turbine State 3 Steam T, 320°C P3= 2MPa What is the enthalpy at state 3? Please enter your answer in kJ/kg =

Solve it correctly please. I will rate accordingly.

a tank of volume 1m3 initially contains steam at 60 bar 320 degrees celsius . stream is stream withdrawn slowly form the tank until the pressure drops to 15 bar. An electronic resistor in the tank transfers energy to the steam maintaining the temperature constant at 320degree Celsius(c) during the process. Neglecting kinetic and potential effects, determine the amount of entropy produced in kj/k

Consider Air “with constant specific heats at room temperature" enters a compressor at 100 kPa, 27°C and leaves at 520 kPa and 227 °C, the compressor experiences a heat loss of 22.3 kJ/kg to the surroundings which are at 22°C. What is the entropy generation (kJ/kg.K)?

In a constant pressure process, 325 KJ of heat are added to 6.55 kg of ideal gas(R=208 J/kg-K and k = 1.65) initially at 290 K. Calculate:a. Final Temperatureb. Change in enthalpyc. Change in internal energyd. Change in entropye. Non-flow work

Q2: 26 tons of ice from and at 0°C is produced per day in an ammonia refrigerator. The temperature range in the compressor is from 26°C to -15°C. The vapour is dry and saturated at the end of compression. Assuming actual COP is 62% of theoretical, calculate the power required to drive the compressor. Take latent heat of ice 335 kJ/kg.