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
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 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 (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.
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 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 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 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 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 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 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 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 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 :)
In: Mechanical Engineering
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