Air is compressed in an adiabatic compressor. Inlet and outlet conditions are 120kPa, 30 oC and 20 m/s; 1.4 MPa, 530 oC and 80 m/s. The surrounding air temperature is 25 oC. The inlet cross-sectional area is 0.013 m2. Assume Cp = 1005 J/kgK, R = 287 J/kgK, k = 1.4.

In an experiment , a certain amount of air is heated at constant pressure from 1,7 cubic meters,20 degrees celsius and 97 KPa to 404 degrees celsius. It is then cooled at constant volume back to its initial temperature.Take specific heat at constant pressure and constant volume for air as 1,005 KJ/kg K and 0,717 KJ/kg K repectively. Calculate: 1. the change specific entropy in the cooling process in 1 decimal place and SI unit  2.the change specific entropy in the constant pressure process in 1 decimal place ans SI unit

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.

Is aircon-ditioner an example of thermodynamic system inside the house? Is it an open system, closed system or isolated system? Explain why.

During a reversible process, 2.07 kg/s of gas rejects 336.8 kJ/s of heat isothermally at 24.9°C. For this gas, c, = 2.14 kJ/kg K and c, = 1.62 kJ/kg K. The initial pressure is 552.3 kPa. Determine the work steady flow of the process in hp if APE = 2.8 kJ/s and AKE = 6.5 kJ/s.

Q2- Consider two ways to compress 2 kg/s of air (an ideal gas with R = 0.287 kJ/kg K and constant heat capacities: cv = 0.718 kJ/kg·K, and cp = 1.005 kJ/kg K) from an inlet Pin = 100 kPa and Tin = 20°C to an outlet Pout = 50 MPa and a heat loss of 150 kW. In this case the outlet temperature is Tout =700°C. Find the work in this case

Determine the force P required to move the wedge to the right if the coefficient of static friction is 0.35 at all contact surface (Figure 3). The uniform cylinder weight, W is 20 kN, and the weight of the wedge may be neglected. 15°

The compressors of a production facility maintain the compressed-air lines at a (gage) pressure of 700 kPa at 1400-m elevation, where the atmospheric pressure is 85.6 kPa. The average temperature of air is 15°C at the compressor inlet and 25°C in the compressed-air lines. The facility operates 4200 h/yr, and the average price of electricity is $0.10/kWh.

The figure shows the thermodynamic properties of an adiabatic steam turbine at the inlet and outlet. The mass flow of the fluid passing through it is 40 kg / s. Developed by the turbine Calculate the power.

Consider a compressor which is used to compress steam (water) through an isentropic process. At the inlet the temperature is 600°C and pressure is 3 MPa. At the exit pressure is raised to 6 MPa. What is the temperature of the steam at the exit of the compressor? (You need to do interpolation to find the exact value) Assumptions. The compressor operates steadily.