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Example 4.16: Feasibility of Process
Looking for ways to improve energy utilization in a chemical plant, a young intern proposes to design a process that will use steam in a closed system to produce work. The steam is available at 10 bar, 650 °C, and will be delivered at 1 bar, 150 °C. The intern expects to generate 1200 kJ/kg from this process. A heat source is available at 200 °C, should the process need any heat.
Determine whether the company should go ahead with this plan.
Example 4.18: Irreversible Expansion in Vacuum
A closed insulated cylinder is divided into parts by a piston that is held into place by latches. One compartment is evacuated, the other contains steam at 7.5 bar, 300 °C. The latches are removed and the gas expands to fill the entire volume of the cylinder. When the system reaches equilibrium, its pressure is 1 bar. Determine the entropy generation.
The potential energy between two atoms A and B are constants and r the interatomic separation distance.
Explain why the resting potential does not equal the Nernst potential of any of the ions
The partition that divides the cylinder is removed and the contents are allowed to reach equilibrium without heat losses to the surroundings. Determine the pressure and temperature in the final state assuming steam to be an ideal-gas. Is ideality..
Design and optimize a suitable shell-and-tube heat exchanger that can satisfy the above mentioned duty and fix a tentative geometry and perform all standard calculations
Calculate the temperature change when 10 mol of benzene is mixed with 40 mol of heptane adiabatically, 1 bar., if the initial temperature of the pure components is 20 °C. The heat capacity of the pure liquids are CP 1 = 134 J/mol, CP 2 = 222 J..
What is the empirical formula of this compound and does this compound behave as an ideal gas
A 100-kW, 250-V shunt generator has an armature-circuit resistance of 0.05 Ω and a field circuit resistance of 60 Ω. With the generator operating at rated voltage,
Develop a two-dimensional addressing system using a 6-to-64 decoder, a 64-word×128- bit matrix, and 16-input multiplexers. How many gates would such a system require?
A gas mixture containing 55 mol% propane and 45 mol% propylene is to be separated into products containing 10 and 90 mol% propane by adsorption in a continuous, countercurrent adsorption system operating at 25°C and 1 atm. The adsorbent is silica ..
A two-pole, three-phase synchronous generator has a balanced three-phase winding with 15 turns per phase. If the three-phase currents are given by ia = 100 cos 377t, ib = 100 cos(377t - 120°), and ic = 100 cos(377t - 240°)
One compartment is evacuated, the other contains steam at 7.5 bar, 300 °C. The latches are removed and the gas expands to fill the entire volume of the cylinder. When the system reaches equilibrium, its pressure is 1 bar. Determine the final tempe..
The vessel is 4 m internal diameter and 20 m long. Estimate the minimum wall thickness required to resist this pressure, for the cylindrical section and the heads. Take the design pressure as 12 bar and the maximum allowable stress for the materia..
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