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Describe the basics of the Carnot cycle of thermodynamics and it's application to heat engines such as Diesel Engines and Gas Turbines.
Determine the pressure drop across the contraction section. How much of this pressure difference is due to losses and how much is due to kinetic energy changes.
For operation at steady state, determine the net power input, in kW per kW of cooling, required by (a) the actual refrigeration cycle and (b) the reversible refrigeration cycle. Compare values.
The heat transfer rate through the walls and roof of a building is 3570 kJ/h per degree temperature difference between the inside and outside. For outdoor temperatures ranging from 20 to -20 degrees
The cutting force F_c is found to be 1780N (400lb) and the normal force F_t is 890 N(200lb). The rake angle of the tool is +8 degrees. Find the power required for the cut in KW (hp).
Water is the working fluid in an ideal Rankine cycle. Steam enters the turbine at 1400 lbf/in^2. The net power output of the cycle is 1 x 10^9 Btu/h.
A workpiece is being cut at 76m/min (250 fpm), and the power is found to be 2.0 kW (2.7hp). What is the cutting force in Newtons (pounds)?
Two channels are welded to a rolled W section as shown. Determine the moments of inertia and the radii of the gyration of the combined section with respect to the centroidal x and y axis.
Show the compression process on P-v and T-s diagrams. What do the areas under the process curve on the P-v and T-s diagram represent?
At what point does the benefit of having the last stage become not worth the effort of protecting the blades? Why not just leave off the last stage of the LP turbine?
Determine the entropy generation (kJ/kg-K) for the compressor. Comment on the relative magnitudes of the specific work and entropy generation for the pump and the compressor.
What is the effect of increasing the boiler pressure in a steam power plant (modeled as an ideal Rankine cycle with fixed condenser pressure and fixed turbine inlet temperature) on the (i) moisture
Consider hydrogen to be ideal gas with constant specific heats. Calculate the minimum possible inlet pressure (bar) of hydrogen gas.
Wind loading is a primary consideration in the design of the supporting mechanisms of billboards, as evidenced by many billboards being knocked down during high winds.
Explain the difference between the magnitudes of rate of entropy generation within the turbine and for the turbine plus its surroundings.
Water vapor enters a turbine operating at steady state at 30 MPa, 600 oC and expands adiabatically to 6 MPa. If the isentropic efficiency is 80%, determine the work developed using the generalized p
The partition is now removed, and the water expands to fill the entire tank. Determine the entropy change of water during this process if the final pressure in the tank is 20 kPa.
One kmol of argon at 300 K is initially confined to one side of a rigid, insulated container divided into equal volumes of 0.2 m3 by a partition. The other side is evacuated.
A stamped 1010 Steel (hot rolled) alternator bracket is subject to an alternating bending stress σxb = 27,349 psi (cycles between zero and the max tension value given).
At what speed should the model be towed to ensure dynamic similarity? What must the drag of the model be multiplied by to give teh drag of the full-scale submarine?
The pipe undergoes a 90 degree bend and exits out a 2-cm-diameter nozzle. Assuming no friction losses in the bend, the total force of the water on the bend is nearest.
Find the actual work the reversible work, and the irreversibility associated with this process. Assume that the enviroment is at 100kPa 25 C.
A rigid tank contains 5 kg of refrigerant-134a initially at 20°C and 140 kPa. The refrigerant is now cooled while being stirred until its pressure drops to 100 kPa. Determine the entropy change
For the meter-in flow control valve system, the following data are given. Determine the required capacity coefficient of the flow control valve.
Write a program that reads in two arrays of integers representing the elements of two sets from two different user-specified input files and calculates both the union and the intersection of the two