List the operating procedure to put the differential pressure transmitter into service and put it out of service with suitable diagram.
In: Mechanical Engineering
The spindle of a high precision machine is subjected to 200 kgf overhang load at 60 mm from the nearest bearing. It is subjected to 50 kgf load at mid span, between the anti-friction bearings. Find the spindle diameters in the overhung portion to optimize the span length. The spindle is transmitting 5 kw at 110 rpm.
In: Mechanical Engineering
Example 1. A horizontal platform rests on four vertical springs, each of stiffness 15 kN/m. What will be the frequency of oscillation of the table if it has a mass of 2 kg? Determine also the angular frequency and the periodic time. (27.6 hz, 173 rad/s, .036 s )
In: Mechanical Engineering
translate:A gas intended for use on a small military ship with a power capacity of 320 hp in the figure A diagram of the turbine engine power plant is given. Air is the power that generates the mechanical power needed by the ship. pass through the turbine. The gas turbine engine uses diesel fuel with a thermal value of 48000 kJ / kg. Combustion In the room, you can get the Air-Fuel ratio of 75 (H / Y = 70). Omit pressure losses in heat exchangers. Model the air by getting the ideal gas as the surrounding work fluid. Taking into account the information given on the figure, (a) determine the efficiency of the engine and the fuel consumption rate, (b) fulfill duties during the 10-day duty period determine the mass of fuel that should be on board, (c) the total mass of the system (fuel and regenerator as the sum of its mass). Total mass, a function of regenerator approach temperature difference draw as. The approach temperature difference is a certain value that minimizes the total mass of the system. You should see; explain why this minimum value occurred
In: Mechanical Engineering
4-23 After heat treatment, the 2-cm thick metal plates (k = 180 W/m·K, ρ = 2800 kg/m3, and cp
= 880 J/kg·K) are conveyed through a cooling chamber with a length of 10 m. The plates enter the cooling
chamber at an initial temperature of 500°C. The cooling chamber maintains a temperature of 10°C, and
the convection heat transfer coefficient is given as a function of the air velocity blowing over the plates h
= 33V0.8, where h is in W/m2·K and V is in m/s. To prevent any incident of thermal burn, it is necessary
for the plates to exit the cooling chamber at a temperature below 50°C. In designing the cooling process to
meet this safety criteria, use the EES (or other) software to investigate the effect of the air velocity on the
temperature of the plates at the exit of the cooling chamber. Let the air velocity vary from 0 to 40 m/s, and
plot the temperatures of the plates exiting the cooling chamber as a function of air velocity at the moving
plate speed of 2, 5, and 8 cm/s.
In: Mechanical Engineering
10 kg of gaseous oxygen is compressed in a piston-cylinder device from an initial state of 0.8 m^3/kg, 25 C to a final state of 0.1 m^3/kg, 287 C, with all heat transfer taking place with the surroundings at 25 C. If the process is reversible, determine:
a) the work done in the process;
b) the overall heat transfer to the oxygen; and
c) the change in entropy of the oxygen and of the surroundings
I struggle a lot with thermodynamics, could you please show all work and if possible state the names of equations used. I will rate! Thank you.
In: Mechanical Engineering
You have just been hired by Innoson Vehicle Manufacturing to
design a new sports car
whose aerodynamics is to be tested in wind tunnel. The drag force
FD on the sports car
is a function of its velocity V⃗ , its projected area A into the
wind, and the density ρ and
viscosity μ of air. Determine the dimensionless relationship
between FD and the other
parameters.
In: Mechanical Engineering
The air in a building is to be maintained at 25°C dry bulb temperature and 60% relative humidity when the outside conditions are 35°C, 50% saturation with a barometric pressure of 101.3 kPa. The total heat gains to the room are 15 kW sensible heat and 3 kW latent heat. There is no recirculation and the fresh air passes over a cooling coil to dehumidify it, and then a heater before entering the room. The cooling coil by pass factor is 0.18; the volume flow of fresh air is 5m3/s. Calculate (a) the temperature of the air leaving the cooling coil; (b) the refrigeration load for the coil in kW; (c) the heat supplied in the heater in kW.
In: Mechanical Engineering
A piston and cylinder device (closed system) contain 2.25 mol of
an ideal gas which
is compressed irreversibly at constant temperature from 423 K and
200 kPa to 8 bar.
The irreversible work applied for the compression is 15 % larger
than the reversible
work for the same process. Determine the entropy change of the gas,
the
surroundings and the total entropy change if the heat is rejected
from the gas to
surroundings maintained at 25 oC.
In: Mechanical Engineering
In: Mechanical Engineering
The volumetric analysis of a certain fuel is given as
C2H6 22.6%
CH4 73.6%
CO2 2.4%
N2 1.4%
For 100 moles and the combustion ofair is dry and in 25%
excess
Calculate
1) The molecular weight of the combustion products
2) The total gas volume for complete combustion at 260oC, 1
bar
3) The dry flue gas analysis based on CO2, O2 and N2.
In: Mechanical Engineering
Q4 / A thick walled hollow cylinder having outside and inside radii of (90, and r) respectively, is subjected to an external pressure of (8000 bar). Find internal radius and the stresses at inner and outer surfaces. E=200GPa
In: Mechanical Engineering
Explain three stages of annealing of metallic materials by sketching their microstructures. Why annealing is used? EXPLAIN.
In: Mechanical Engineering
(a) Explain why XRD (X-Ray Diffraction) and TEM (Transmission Electron Microscopy) techniques are suitable in examining the unit cells and crystal structures of solids. (b) Calculate the expected diffraction angle (θ) for the first order reflection from the (310) planes of BCC chromium (Cr) when a monochromatic X-ray radiation of wavelength (λ) 0.757 Ao is used.
In: Mechanical Engineering
write a Fortran 77 language code for the vortex tube used in mining with its exergy and anergy analysis using r407c refrigerant
In: Mechanical Engineering