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A plant has saturated steam available at 2700 kPa, but there is little use for this steam. Rather, steam at 1000 kPa is required. Also available is saturated steam at 275 kPa. A suggestion is that the 275 kPa steam be compressed to 1000 kPa, using the work of expanding of the 2700 kPa steam to 1000 kPa. The two streams at 1000 kPa would then be mixed. Determine the rates at which steam at each initial pressure must be supplied to provide enough steam at 1000 kPa so that upon condensation to saturated liquid heat in the amount of 300 kW is released
(a) If the process is carried out in a completely reversible manner.
(b) If the higher-pressure steam expands in a turbine of 78% efficiency and the lowerpressure steam is compressed in a machine of 75% efficiency. Make a thermodynamic analysis of this process.
A vapor rate of 2500 kg/h is required and the vaporizer will operate at 6 bara. Size the vessel to restrict the carryover of liquid droplets. The liquid hold-up time need not be considered, as the liquid level will be a function of the thermal des..
Discuss the criteria that you would use to determine the required dimentions of this device. What are the potential failure mechanisms? What materials might be appropriate for the manufacture of this device, and why?
In the manufacture of methyl ethyl ketone from butanol, the product is separated from unreacted butanol by distillation. The feed to the column consists of a mixture of 0.90 mol fraction MEK, 0.10 mol fraction 2-butanol, with a trace of trichloroe..
This cross-linking brings about a stiffening of the rubber by anchoring and thereby preventing intermolecular movement of rubber springs.
For a reversible liquid phase reaction A-^R, the conversion is 33.3% after 8 minutes and equilibrium conversion is 66.7%. Find the rate equation for the reaction.
Steam entering a turbine at 4000 kPa and 673.15 K (400°C) expands reversibly and adiabatically.
She believes she can extract 1700 kW of work and 220 kW of heat that will be used to boil water at 1 bar. Her process, whose details are yet to be determined, will receive streams A and B as inlet and will have a single outlet stream that will be ..
Calculate the heat (kJ) required to raise the gas temperature from 25°C to 1000°C if the heating takes place at constant volume (i.e., if the piston does not move), retaining successively one term, two terms, and all three terms of the heat capaci..
If the pounds of water evaporated per pound of steam equals 0.85 x number of effects, determine the optimum number of effects for minimum annual cost.
Prepare a skeleton outline and a detailed outline
Suppose the volumetric flow rate of the gas leaving the condenser is 20.0m3/h Calculate the rate (kg/h) at which acetone is vaporized in the solvent recovery unit.
The diagrams above show four Bode plots of uncompensated and compensated performance for a particular control system. Which diagram shows the effects of adding phase-lag compensation?
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