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A 100 MW steam station uses coal of calorific value 6400 kcal/kg.
Thermal efficiency of the station is 30% and electrical efficiency is 92% Calculate the coal consumption per hour when the station is delivering its full rated output.
Assuming $0.10/W electricity expense with a 5% annual inflationary rate increase, and a $7.50/W installed cost, what will the payback be for this system after the rebate from the utility provider?
a refrigerator is to remove heat from the cooled space at a rate of 300 kjmin to maintain its temperature at -8c. if
Suppose you are appointed as a material engineer at an industry company. The company produces, cutting tools, various car and truck spare parts using different steels. The steels as raw materials to make the parts. All steels are round bars with 50 m..
Calculate 01 the force ratio and movement ratio of each jack 00 the pressure within the hydraulic fluid - Describe the operation of a device which uses hydraulic pressure.
Assume that for a tensile test, d?t/d?t= ?t when necking begins. Based on this condition, determine the true strain at the onset of necking? Explain carefully any assumptions made.
initially an insulated rigid tank contains 15.65 kg of water at 24.16oc and 101 kpa. the tank also contains a 3.12 kg
1 a if the vacancy concentration in cu is measured to be 10-5 at 1300k near its melting point what is evf? assume
one of the inspectors in the quality control department has frequently used the brinell and rockwell hardness tests for
an airplane flying at m0 0.8 under standard sea level conditions has instrumentation embedded at the stagnation point
A piston-cylinder device contains 2.2kg of nitrogen initially at 100kPa and 25C. The nitrogen is now compressed slowly in a polytropic process during which PV^1.3 = constant until the volume is reduced by one-half. Determine the work done and the hea..
Ultimate tensile stress = 490MN/m2Ultimate shear stress = 290MN/m2Calculated shear stress = 26.24MPa
estimate the density of an aluminum-magnesium alloy used for soda cans as a weighted average of the densities of
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