Water at p1 = 20 bar, T1
= 400oC enters a turbine operating at steady state and
exits at p2 = 1.5 bar, T2 =
220oC. The water mass flow rate is 4000 kg/hour. Stray
heat transfer and kinetic and potential energy effects are
negligible.
Determine the power produced by the turbine, in kW, and the rate of
entropy production in the turbine, in kW/K.
In: Mechanical Engineering
Draw the electrical circuit diagram of electromagnetic forming, label it neatly and explain how a thin cylinder can be expanded or compressed by this process.
In: Mechanical Engineering
A solid cylinder of 6 inch diameter and 4 inch high is
compressed axisymmetrically to 2 inch high.
a) Calculate the final diameter of the product, the three
orthogonal strains and the Von Mises strain.
b) Estimate the maximum total force required for this operation.
Assume: coefficient of fricition 0.2; Use Ludwik's Law to find the
pressure at maximum axial strain; the strength coefficient of the
workpiece: K is 147 ksi, strain hardening exponent is 0.17.
In: Mechanical Engineering
What is the percentage change in the R-value of the window if double glazed window is used with 6.4 mm and 12.7 mm air in between as compared to single glazed window? Does the resistance increase linearly with the thickness of the space?.
In: Mechanical Engineering
1a. Write the three-dimensional state of uniform stress in a deformable medium
1b.
. Show from table below that total true stain is equal to the sum of the incremental true strains. Consider a rod of 2 cm long that is elongated in three increments, each has a strain of 0.1.
|
Increment |
length |
e |
|
0 |
2 |
0.1 |
|
1 |
2.20 |
0.1 |
|
2 |
2.42 |
0.1 |
|
3 |
2.662 |
0.1 |
In: Mechanical Engineering
Which is the most efficient? A parallel hydrogen fuel cell or one connected in series? Can you explain your reasoning to your answer?
In: Mechanical Engineering
Describe the mathematical models of the boundary value problem to evaluate the elastic deflection of the beam based on Euler-Bernoulli and Timoshenko theories with finite difference discretisation (for numerical integration and differentiation)
In: Mechanical Engineering
A 40 wt% Pb–60 wt% Mg alloy is heated to a temperature within the a liquid-phase region. If the mass fraction of each phase is 0.5,
then estimate
(a) the temperature of the alloy
(b) the compositions of the two phases in weight
percent
(c) the compositions of the two phases in atom
percent
In: Mechanical Engineering
A 40 wt% Pb–60 wt% Mg alloy is heated to a temperature within the a liquid-phase region. If the mass fraction of each phase is 0.5,
then estimate
(a) the temperature of the alloy
(b) the compositions of the two phases in weight
percent
(c) the compositions of the two phases in atom
percent
In: Mechanical Engineering
In: Mechanical Engineering
In: Mechanical Engineering
What is the effect of time and temperatuure on the mechanical properties of polymers (in regards to polymer chains)?
In: Mechanical Engineering
To what temperature would you need to heat the carbon steel
rivets to ensure the plates developed sufficient compressive force
to transmit the load in shear. The force the joint is required to
carry is 20,000 lbs. The plates are to be used for retaining walls
below the permafrost depth, so their operation temperature will be
52 F. The clamped plates are made of steel and have
clean and dry surfaces. Please show all work
In: Mechanical Engineering
Which of the following is not the charecterstic of Pallet loads placed on racks in multi-rackStructure: Select one: a. Good accessibility b. Low cost c. None of these d. Good stroge density
In: Mechanical Engineering
In: Mechanical Engineering