Water steam flows steadily through an adiabatic turbine. The inlet conditions of steam are 1.0 x 106 Pa and 600°C, one of the exit conditions is 7.5 x 103 Pa. Assuming the process is isentropic, determine (with the help of the steam table): (a) the temperature of the steam at the exit (K). (b) the quality of the steam at the exit (%). (c) the specific enthalpy of the steam at the exit (kJ/kg). (d) the work done per unit mass by the turbine (kJ/kg).

Question : Consider a piston-cylinder device containing m = 1 kg of air at the initial temperature T1 = 900K and pressure P1 = 895 kPa (state 1). The ambient temperature and pressure are maintained at T (e) = 300K and P (e) = 100 kPa. The air expands in a reversible adiabatic process until the air pressure reaches the ambient pressure P(e) (the intermediate state 2). Subsequently, the system undergoes an isobaric process until it reaches the dead state DS. Part ( A) Evaluate the volume and internal energy of the air in the initial state 1, in the intermediate state 2, and in the final dead state DS. Also evaluate the temperature of the air in the intermediate state

Thermodynamic

Q:) A piston-cylinder device initially contains 0.5 kg of air at 1 MPa and 400°C. The air is first compressed Polytropically with a Polytropic exponent of (K = 1.4) to 4 MPa, then expanded isothermally to the initial pressure, and finally compressed at the constant pressure to the initial state. Draw the PV diagram of the cycle and then determine: 1. The boundary work of the entire cycle (W). II. Internal energy change (AU) during the polytropic expansion. Heat released (Q) during the isobaric process. III.

Air is compressed steadily by a reversible compressor from an inlet state of 100 kPa and 300 K to an exit pressure of 900 kPa. Determine the compressor work per unit mass for ideal two-stage compression with intercooling with a polytropic exponent of 1.3.

If saturated liquid steam at 850 kPa is throttled to 120 kPa, what is the quality of the resulting steam?

1. Steam flows steadily through an adiabatic turbine. The inlet conditions of the steam are 4 MPa, 500°C, and 80 m/s, and the exit conditions are 30 kPa, 92% quality, and 50 m/s. The mass flow rate of the steam is 12 kg/s. Develop the mass and energy balance for this situation. Then, determine (a) the change in kinetic energy, (b) the power output, and (c) the turbine inlet area. Provide all evidence (referred tables, equations used, etc.) to support your answers. P = 4 MPa T = 500°C V = 80 m/s Steam m = 12 kg/s W out P2 = 30 kPa X2 = 0.92 V2= 50 m/s

NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. An adiabatic air compressor compresses 10.4 L/s of air at 120 kPa and 20°C to 1000 kPa and 300°C. The constant pressure specific heat of air at the average temperature of 160°C = 433 K is cp= 1.018 kJ/kg.K. The gas constant of air is R = 0.287 kPa.m³/kg-K. 1 MPa 300°C Compressor 120 kPa 20°C Vus Determine the work required by the compressor. (You must provide an answer before moving on to the next part.) The work required by the compressor is -4.578 kJ/kg.

H2   A steam turbine that operates in a reversible and adiabatic way, processes 0.25 kg/s of water vapor at 800 kPa. Steam leaves the turbine at 50 kPa and 100 °C. Determine:a) the temperature at which the steam enters(b) the work per unit mass produced by this turbine.

Q6: 1. Entropy generation is also used to establish criteria for the performance of engineering devices. Explain this point. 2. A well-insulated rigid tank contains 4 kg of a saturated liquid-vapor mixture of water at 250 kPa. Initially, three-quarters of the mass is in the liquid phase. An electric resistance heater placed in the tank is now turned on and kept on until all the liquid in the tank is vaporized. Determine the entropy change of the steam during this process. 3. Refrigerant-134a at 1 MPa and 100 °C is throttled to a pressure of 0.8 MPa. Determine the reversible work and exergy destroyed during this throttling process. Assume the surroundings to be at 30 °C. 4. Explain Figure Q6-4 FIGURE Q6-4 Thermal efficiency of the ideal Diesel cycle as a function of compression and cutoff ratios (k-1.4). 0.6 0.3 0.4 0.3 0.2 0.1 r. -1 (Otto Typical compression ration leset 8 10 12 14 16 18 20 Compression ratio,