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A power plant operating on heat recovered from the exhaust gases of internal combustion engines uses isobutane as the working medium in a modified Rankine cycle in which the upper pressure level is above the critical pressure of isobutane. Thus the isobutane does not undergo a change of phase as it absorbs heat prior to its entry into the turbine. Isobutane vapor is heated at 4800 kPa to 533.15 K (260"C), and enters the turbine as a supercritical fluid at these conditions. Isentropic expansion in the turbine produces a superheated vapor at 450 kPa, which is cooled and condensed at constant pressure. The resulting saturated liquid enters the pump for return to the heater. If the power output of the modified Rankine cycle is 1000 kW, what is the isobutane flow rate, the heat-transfer rates in the heater and condenser, and the thermal efficiency of the cycle?The vapor pressure of isobutane is given by
The temperature of the cold tap water is 22.0C, and the temperature of the hot tap water is 55.0C. If a student starts with 90.0 g of cold water, what mass of hot water must be added to reach 37.0C? Explain in detail how you arrived at your ans..
The volumetric flow rate and solute concentration of stream 2, q2 and c2, vary with time, while those of stream 1 are constant.
What is the identity of the solid? Give the balanced equation of this species decaying by -particle production. Why is the solid a more potent a-particle producer?
Neglect any uncertainty in the mass. Explain how you arrived at your answer.
The specification for a sieve plate column is given below. Make a preliminary mechanical design for the column. Your design should include:
His Ph.D. research atStanford focused on computer simulations of how mechanical stresses affect bone growth and adaptive changes around implants. He was doing biomechanics but "with a little 'b' and a big 'M'," he says.
prepare the design and evaluation of a new chemical manufacturing process.1 acetylation reactor2 separation of
Assuming the total brush-contact drop to be 2 V, find the induced armature voltage at rated load and rated terminal voltage for
Use the following additional information to find the mass transfer flux in the column: mole fraction of ammonia in liquid* 1.351 × 10-3 mole fraction of ammonia in gas* 0.065 total pressure of system 1.013 bar mole mass of ammonia 17 *Note: these ..
Natural gas composed of 60. mol% methane, 30. mol% ethane, and 10. mol% propane at 25 °C and 500. psia is fed at a rate of 50. m3/hr into a boiler. In the boiler it is blended with enough air to provide 20% excess oxygen and combusted.
Materials Properties, Consider the following three engineering materials: (i) low-carbon steel; (ii) alumina; (iii) glass-fiber reinforced polymer.
Then find the voltage across the 50-Ω resistor and the total power supplied by the source
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