EBK MACHINE ELEMENTS IN MECHANICAL DESI
EBK MACHINE ELEMENTS IN MECHANICAL DESI
6th Edition
ISBN: 9780134451947
Author: Wang
Publisher: YUZU
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Chapter 1, Problem 26P

For Problems15−28, perform the indicated conversion of units. (Refer to Appendix 16 for conversion factors.) Express the results with the appropriate prefix as illustrated in Tables1−3 and 1−4.

26. To compute the energy used by a motor, multiply the power that it draws by the time of operation. Consider a motor that draws 12.5 hp for 16 h/day, five days per week. Compute the energy used by the motor for one year. Express the result in  ft lb and W h .

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A distillation column with a total condenser and a partial reboiler is separating ethanol andwater at 1.0 atm. Feed is 0.32 mol fraction ethanol and it enters as a saturated liquid at 100mol/s on the optimum plate. The distillate product is a saturated liquid with 80 mol% ethanol.The condenser removes 5615 kW. The bottoms product is 0.05 mol fraction ethanol. AssumeCMO is valid.(a) Find the number of equilibrium stages for this separation. [6 + PR](b) Find how much larger the actual reflux ratio, R, used is than Rmin, i.e. R/Rmin. [3]Note: the heats of vaporization of ethanol and water are λe = 38.58 ௞௃௠௢௟ and λw = 40.645 ௞௃௠௢௟
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EBK MACHINE ELEMENTS IN MECHANICAL DESI

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