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Make a thermodynamic analysis of the process described in Pb. 8.8. Tσ = 300.15 K (27°C).
Pb. 8.8
A steam power plant operating on a regenerative cycle, as illustrated in Fig. 8.5, includes two feedwater heaters. Steam enters the turbine at 6500 kPa and 873.15 K (600°C) and exhausts at 20 kPa. Steam for the feedwater heaters is extracted from the turbine at pressures such that the feedwater is heated to 463.15 K (190°C) in two equal increments of temperature rise, with 5 K (5°C) approaches to the steam-condensation temperature in each feedwater heater. If the turbine and pump efficiencies are both 0.80, what is the thermal efficiency of the cycle and what fraction of the steam entering the turbine is extracted for each feedwater heater?
List as many items and give as many details as possible. Hints: Consider the problems of obstacle detection, information display, propulsion system, inertial guidance, route recall, power supply, etc.
Write an essay on the replacement of metallic automobile components by polymers and composite materials. Address the following issues:
The massive emission of carbon dioxide (CO2), the major component of greenhouse gasin the environment, is receiving significant attention around the world. This has led tonumerous proposals to sequester or eliminate the CO 2. One of the options is..
determine the induced voltage at (a) full load, and (b) one-half full load. Neglect brush-contact drop.
Use tabulated thermodynamic data to find ΔG° for this reaction at the standard temperature of 25°C. Then calculate the calculate ΔG°1000 for this process when it occurs at 1000 K.
The process used in the manufacture of aniline from nitrobenzene is described in Appendix F, Design Problem F.8, which is available in the online material at booksite.Elsevier.com/Towler. The process involves six significant stages:
Determine the synchronous speed in revolutions per minute and the useful torque in new ton meters of a 200-hp, 60-Hz, six-pole synchronous motor operating at its rated full load (1 hp ≅ 746 W).
6. Famous New Zealand scientist Ernest Rutherford was awarded a Nobel Prize in which field? 7. What is the chemical symbol for gold? 8. K is the chemical symbol for which element?
Commercial cold packs and hot packs are available for treating athletic injuries. Both types contain a pouch of water and a dry chemical. When the pack is struck, the pouch of water breaks, dissolving the chemical, and the solution becomes either ..
The leaving vapors will contain water vapor at a pressure equivalent to the equilibrium vapor pressure of water at 15°C. If a suction pressure of 2.0 in Hg absolute is to be maintained by the jet, estimate the pounds of steam required per hour to ..
A 2300-V, three-phase, wye-connected, round rotor synchronous motor has a synchronous reactance of 3 Ω per phase and an armature resistance of 0.25 Ω per phase.
List out the different biological process involving acids and bases with relevant equations and in adverse conditions how is the pH level maintained in biological systems?
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