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A steam turbine operates adiabatically with a steam rate of 25 kg s-1. The steam is supplied at 1300 kPa and 673.15 K (400°C) and discharges at 40 Wa and 373.15 K (100°C). Determine the power output of the turbine and the efficiency of its operation in comparison with a turbine that operates reversibly and adiabatically from the same initial conditions to the same final pressure.
A supply of nitrogen is required as an inert gas for blanketing and purging vessels. After generation, the nitrogen is compressed and stored in a bank of cylinders, at a pressure of 5 barg.
Your painting showed a carbon-14 activity of 15.1 counts per minute per gram. Could it be a genuine Rembrandt?
Your boss has asked you to recommend a value for the vapor, liquid ratio V/L. What is your recommendation?
Use molecular orbital theory to predict whether the bond order in the superoxide ion, O2-, should be higher or lower than the bond order in neutral O2 molecule.Is the bond order of O2- higer or lower than that of O2?
Design a condenser for the following duty: 45,000 kg/h of mixed light hydrocarbon vapors to be condensed. The condenser is to operate at 10 bar. The vapor will enter the condenser saturated at 60 °C and the condensation will be complete at 45 °C.
The armature-circuit resistance is 0.25 Ω and the series-field resistance is 0.25 ?4. Calculate the speed of the motor
wave-connected. (Note: The number of parallel paths is equal to the number of poles for lap windings, while it is equal to 2 for wave windings.)
From a three-phase, 60-Hz system, through a motor-generator set consisting of two directly coupled synchronous machines, electric power is supplied to a three-phase, 50-Hz system.
The total length of the pipeline from the rail tanker outlet to the pump inlet is 50 m. The vertical distance from the tank outlet to the pump inlet is 10 m. Commercial steel piping, 50 mm internal diameter, is used.
What is the required flow rate of cooling water to the exchanger between the wasteheat boiler and the absorber and how much heat must be removed by the two heat exchangers cooling the recycled absorber liquid? Why is there a need to remove this heat?
Design a storage and feed system for the sorbitol powder. Sorbitol has average bulk density 1.48 kg/liter, and can be assumed to have an average particle size of 200 μm.
Indium antimonide (InSb) is a semiconductor with a narrow band gap of 0.17eV and an intrinsic carrier concentration of 2×1016cm-3. The mobility of electrons in InSb is 78000 cm2/V⋅s and their effective mass is 0.014m0, while the holes have a mobility..
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