Questions
Carry out the equipment and operating procedures between injection molding of thermoplastics and injection molding of...

Carry out the equipment and operating procedures between injection molding of thermoplastics and injection molding of thermosets(full detailed answer)

In: Mechanical Engineering

A stationary power plant operates on Brayton cycle has a pressure ratio of 8. The gas...

A stationary power plant operates on Brayton cycle has a pressure ratio of 8. The gas
temperature is 300 K at the compressor inlet and 1300 K at the turbine inlet. Assuming
a compressor efficiency of 80 percent and a turbine efficiency of 85 percent, determine:

1) the gas temperature at the exits of the compressor and the turbine,
2) the back work ratio,
3) the thermal efficiency of the cycle,
4) the thermal efficiency of the gas-turbine power plant as described above, if a
regenerator with effectiveness of 80% is installed. Explain your answer by
comparing it to answer iii) and show the process on a T-s diagram.

In: Mechanical Engineering

A double pane window consists of two pieces of glass each of 8 mm thick that...

A double pane window consists of two pieces of glass each of 8 mm thick that enclose an air space of 8 mm thick. The window separates room air at 18°C from outside ambient air at -8°C. The convection coefficient associated with the inner (room-side) surface is 12W/m2 .K. The thermal conductivity of the glass is kg=1.35 W/m. K and that of the air is ka=0.027 W/m. K Q1- If the outside air convection coefficient is ho = 76 W/m2 .K what is the heat loss through a window that is 0.8 m long by 0.5 m wide? Neglecting radiation and assume the air enclosed between the panes to be stagnant. Q2- We consider now that the heat transfer in the air gap is transferred by conduction and radiation and that the radiation coefficient hrad = 3 W/m2 K . Show the thermal circuit representing the steady state situation and define the new heat transfer loss through the window

In: Mechanical Engineering

A steam turbine receives 8 kg/s of steam at 9 MPa, 650 C and 60 m/s...

A steam turbine receives 8 kg/s of steam at 9 MPa, 650 C and 60 m/s (pressure, temperature and velocity). It discharges liquid-vapor mixture with a quality of 0.94 at a pressure of 325 kPa and a velocity of 15 m/s. In addition, there is heat transfer from the turbine to the surroundings for 560 kW. Find the power produced by the turbine and express it in kW

In: Mechanical Engineering

Kindly answer the following short answers asap please. 1.What are the criteria for selecting offshore structures....

Kindly answer the following short answers asap please.

1.What are the criteria for selecting offshore structures.

2.Define production packer. Draw a simple diagram that represents it

In: Mechanical Engineering

A single stage double acting air compressor delivers 15 m3/min. measured at 1.013 bar and temperature...

A single stage double acting air compressor delivers 15 m3/min. measured at 1.013 bar and temperature 270C and delivers at 7 bar. The conditions at the end of the suction stroke are pressure 0.98 bar and temperature 400C. The clearance volume is 4% of the swept volume and the stroke / bore ratio is 1.3/1, compressor runs at 992 rpm. Calculate the volumetric efficiency, cylinder dimensions, indicated power and isothermal efficiency of this compressor. Take the index of compression and expansion as 1.3, R= 0.587kJ/Kg-K.

In: Mechanical Engineering

As an engineer, you are asked to choose between a PV panel system and a wind...

As an engineer, you are asked to choose between a PV panel system and a wind turbine for your site. PV panel system costs 900,000 USD to implement while the cost of the wind turbine system is 500,000 USD. PV panels have a lifetime of 25 years, and wind turbine lifetime is 15 years. The annual operation and maintenance cost of PV is 30,000 USD, and wind turbines are 50,000 USD. From the annual electricity generation, PV panels are making 250,000 USD every year, while this amount is 180,000 USD for the wind turbine. The salvage value of the PV is 80,000 USD, and the salvage value of the wind turbine is 30,000 USD. The interest rate is 10%.


a) Compare the annual worth of PV and wind turbines.

b) Compare the payback period of PV and wind turbines.
c) Compare the Benefit/Cost ratio of PV and wind turbines.
d) Select one option (PV or turbine) for your site. Include an explanation of why you select that option.

In: Mechanical Engineering

Determine the correlation function of the square wave. b) Determine the cross relationship functions of the...

Determine the correlation function of the square wave.

b) Determine the cross relationship functions of the triangular wave and the square wave.

c) Explain the random variable, statistical mean, time average, variance and moment concepts.

In: Mechanical Engineering

Methane gas enters a horizontal pipe with a thin wall of 25 cm diameter at a...

Methane gas enters a horizontal pipe with a thin wall of 25 cm diameter at a temperature of 309 C with 4.5 tons of mass flow per hour and exits at 289 C. The pipe is smooth and its length is 10 m and the ambient and environmental temperature is 25 C. Since the smear coefficient of the pipe surface is given as 0.8;
 a-) Indoor and outdoor convection coefficients (W / m2K),
b-) Heat loss from the pipe to the environment (W),
c-) The surface temperature of the pipe (C),
d-) Calculate the required fan control (W) and interpret the results.

In: Mechanical Engineering

Write a report on AI based Social distancing monitoring using drone with out human interaction report...

Write a report on AI based Social distancing monitoring using drone with out human interaction report should contain drone design it specification it's algorithm control system algorithm.minimum 10 A4 size page.No plagiarism is allowed other wise down rate is given

In: Mechanical Engineering

A 2-m3 rigid insulated tank initially containing saturated water vapor at 1 MPa is connected through...

A 2-m3 rigid insulated tank initially containing saturated water vapor at 1 MPa is connected through a valve to a supply line that carries steam at 400°C. Now the valve is opened, and steam is allowed to flow slowly into the tank until the pressure in the tank rises to 2 MPa. At this instant the tank temperature is measured to be 300°C. Determine the mass of the steam that has entered and the pressure of the steam in the supply line. The initial and final properties of steam in the tank are v1 = 0.19436 m3/kg, u1 = 2582.8 kJ/kg, v2 = 0.12551 m3/kg, and u2 = 2773.2 kJ/kg. Solve using appropriate software.

The mass of the steam is kg.

The pressure of the steam is kPa.

In: Mechanical Engineering

6.Write a report on AI based Social distancing monitoring using drone with out human interaction report...

6.Write a report on AI based Social distancing monitoring using drone with out human interaction report should contain drone design it specification it's algorithm control system algorithm.minimum 10 A4 size page.No plagiarism is allowed other wise down rate is given
Don't copy from old Chegg answers

In: Mechanical Engineering

A hot plate with a temperature of 60 ° C will be cooled by adding 50...

A hot plate with a temperature of 60 ° C will be cooled by adding 50 triangular profile needle blades k = 209 W / mK with a length of 59 mm and 10 mm. The ambient temperature is 20 C and the heat transfer coefficient on the surface is 20 W / m2K according to the situation;

a-) Wing efficiency,

b-) Total heat transfer rate (W) from the wings,

c-) Calculate the effectiveness of a wing.

In: Mechanical Engineering

How can I explain these question? If need more info. You can ask. Thank you :)...

How can I explain these question? If need more info. You can ask. Thank you :)

  1. Briefly state difference between torsion of circular sections and torsion of rectangular sections
  2. Compare maximum stress of a square profile with that of a circular inscribed profile (state assumptions)

In: Mechanical Engineering

Chapter 3, problem 7 Discuss three modes of chip formation when machining unidirectional FRPs. Discuss the...

Chapter 3, problem 7

Discuss three modes of chip formation when machining unidirectional FRPs.
Discuss the influence of fiber orientation and rake angle on each mode.

In: Mechanical Engineering