Under normal operation, a dairy plant requires 4 kg/s of saturated steam at 2 MPa, which is extracted from the turbine of a cogeneration plant. Steam enters the turbine at 8 MPa and 500 ºC at a rate of 11 kg/s and leaves at 20 kPa. The extracted steam leaves the process heater as a saturated liquid and mixes with the feedwater at the constant pressure. The mixture is then pumped to the boiler pressure. Determine. (a) the rate of process heat supplied, (b) the net power output and utilization factor for this operating condition, (c) the maximum process heat that this cogeneration plant can supply, (d) the net power output when there is no need for process heat.

Please reference all tables you use. Thanks.

how we can safe guard global warming?

The working gas of a thermodynamic cycle is air(assume constant specific heats.)The gas originally starts at 100kPa, 4m3and 27oC. It undergoes a four step process:Process A-B: The gas is compressed at constant temperature to one-fourth of its volume. Process B-C: The volume of the gas is then doubled at constant pressure. Process C-D:The gas then undergoes an adiabatic expansion.Process D-A:The gas then undergoes a constant volume process back to its original statea) Make a table of the temperature, pressure, volume, internal energy, enthalpy, entropy and quality factor (T, P, V, U, H, S & x) at the start of each process.b) Make a table of the change in internal energy, heat flow, work done, change in enthalpy, and change in entropy (U, Q, W, H, S) during each leg of the cycle.c) Draw a well-labelled P-v diagram (indicating lines of constant temperature.)d) Calculate the thermal efficiency of the cycle.

Explain single horseshoe vortex and its problem in predicting the aerodynamic properties of a finite wing/downwash.

Water at 700 oC has a specific volume of 0.02600m3/kg. Determine the pressure of the water based on a) ideal gas equation, b) the generalized compressibility chart and c)the steam tables. (d) Determine the error involved in cases (a) & (b).

Stabilization and landing braking during landing and takeoff, located on aircraft wings
the so-called flap and spoiler, composite, aluminum alloys, etc.
It is produced from materials.
Two different aircraft firms, precipitation hardening on the same aluminum alloy material
They wanted to produce these parts by applying (aging) heat treatment. Heat treatment
As a result of mechanical tests on applied parts, mechanical parts of a firm
strength was found to be lower than that of the other firm. made
In the examinations, in the aging heat treatment of this problem, some companies
since they take the size (s) of their parameters different from each other
It was determined that it originated due to (their choice).
a) The parts produced by the two companies have different mechanical strength, aging thermal
What parameters might have affected the process? (10 points)
b) Materials science, which causes this difference in mechanical properties.
(Microstructure formations, etc.) in terms of evaluation and explain. (20 points)

Saturated vapor steam enters a well-insulated turbine at 300^oC. The mass flow rate is 1.00 kg/s and the exit pressure is 50 kPa. Determine the final state of the steam if the turbine power output is 400 kW.

a). What is the amount of heat transfer in or out the turbine ?

b). Explain or show your calculation for your answer in a).   

c). What is the substance that you use to look for pure substance properties ?

d). What is the equation of conservation of energy for solving this problem? Indicate each symbol in your equation.

e). Find the enthalpy of saturated vapor steam at 300 °C. Explain how you find the enthalpy, such as the database you use, the steps leads to the answer.

f). Find the enthalpy of saturated liquid, Hf, and enthalpy of saturated vapor, Hg, at 50 kPa.

g). The given work output is 400 kW. Is this a positive or negative value in your equation of conservation of energy? Explain your answer.

h). Determine the final state of the steam, show your work step by step for credits

3. ÿ+ 6ẏ + 5y = r̈+ 9r

(a) Find the system’s transfer function (b) Plot poles and zeros on the s-plane (c) Provide the system’s time response from the poles of the transfer function (d) Is the system stable? Why or why not? (e) What type of system is it? (undamped, over damped, critically damped, underdamped, etc.?)

During a compression process, 35 (kg/min) of R-134a at 0.6 (bar) and 0 (°C) is continuously sent through a pipe system with an internal diameter of 3 (in.). The discharge pressure is 0.5 (MPa) and 30 (°C). The inside diameter of the tube is 1 (in.). During the process, heat is transmitted at a rate of 9 (kJ/s). Calculate the power produced by the compressor, consider g = 9.81 (m/s^2 ).

QUESTION NO 1

In an Otto cycle air is compressed from an initial pressure 120 kPa and temperature (T = 380). The cycle has compression ratio of 10. In the constant volume heat, addition process 1000 kJ/kg heat is added into the air. Considering variation on the specific heat of air with temperature, determine,

(a) the pressure and temperature at the end of heat addition process (show the points on P-v diagram)

(b) the network output

(c) the thermal efficiency

(d) the mean effective pressure for the cycle

The gas constant of air is R = 0.287 kJ/kg.K.

(Describe the necessary assumptions you have considered in your solutions.)

QUESTION NO 2

Repeat Q1 using cold air standard assumption.

(Properties: The properties of air at room temperature are cp = 1.005 kJ/kg·K, cv = 0.718 kJ/kg·K, R = 0.287 kJ/kg·K, and k = 1.4)

Basic Elements:

What are the basic elements used for modeling mechanical translational system?

What are the basic elements used for modeling mechanical rotational system?