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Find the flows and fluxes of exergy in the condenser of Problem 9.29. Use them to determine the second law efficiency, T0 = 15?C.
Problem 9.29
A coal-fired power plant produces 25 kg/s steam at 3 MPa, 600?C in the boiler. It cools the condenser with ocean water coming in at 15?C and returned at 18?C, so the condenser exit is at 50?C. Find the net power output and the required mass flow rate of ocean water.
Plot the adiabatic flame temperature as the percent excess air varies from 10 to 100 percent.
The maximum stress is the same in both tension and compression. The endurance limits or fatigue strengths for several candidate materials are shown below. Design the shaft, including an appropriate material, and justify your solution.
The water experiences a temperature rise of 14°F. The air leaves the cooling section saturated at 70°F. Determine (a) the rate of heat transfer, (b) the mass flow rate of the water, and (c) the exit velocity of the airstream.
An above ground pool needs to be drained. The drained water will be used to irrigate a garden and some trees at the bottom of the hill, the pool sits at the top of. You have a 1 inch diameter hose to drain the pool.
A water treatment plant is being designed for a flow of 1.6 m^3/s. How many rapid sand filters, using only sand as the medium, are needed for this plant if cross-sectional area of each filter is 10 m x 20 m?
Using EES (or other) software, write a program to determine the entropy change of a mixture of three ideal gases when the mass fractions and other properties of the constituent gases are given. Run the program for a sample case, and give the resul..
Carlisle Company has been cited and must invest in equipment to reduce stack emissions or face EPA fines of $18,500 per year. An emission reduction filter will cost $75,000 and have an expected life of 5 years. Carlisles MARR is 10 percent/year.
a model rocket is launched straight upward. its altitude y as a function of time is given by y bt -ct2 where b 82 ms
Light-Voice Controlling System. We are planning to design a new light-voice controlling system. The voices will basically coordinate the crossing of a road by blind people. Suppose the crossing will be operated by two coordinated systems
At an axial load of 23 kN, a 40-mm-wide by 10-mm-thick polyimide polymer bar elongates 2.7 mm while the bar width contracts 0.17 mm. The bar is 240 mm long. At the 23-kN load, the stress in the polymer bar is less than its proportional limit.
A new sports car has a drag coefficient of 0.30 and a frontal area of 21 ft 2 , and is traveling at 110 mi/h.How much power is required to overcome aerodynamic drag if ? = 0.002378 slugs/feet3 ?
Due to the intended service use, the forklift's market value drops 20% of its prior year's value in Years 1 and 2 and then declines by 15% until Year 10 when it will have a scrap/market value of $1000.
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