Question

D Question 3 5 pts A standard electric motor is rated at 10 horsepower (HP) and costs $800. its full-load efficiency is specified to be 87%. A newly designed, high efficiency motor of the same size has an efficiency of 93%, but costs $1,200. It is estimated that the motors will operate at a rated 10-HP output for 2,500 hours a year, and the cost of energy will be $0.07 per kilowatt- hour. Each motor is expected to have 12-year life. At the end of 12 years, the first motor will have a salvage value of $50, and the second motor will have a salvage value of $100. Consider the MARR to be 8%. (Note: 1HP 0.7457 kW) Un motor eléctrico estándar de 10 hp cuesta $800. Su eficiencia de carga está especificada en 87%. Un motor de eficiencia alta de 10 hp tiene una eficiencia de 93% pero cuesta $1,200. Se estima que los motores operarán por 2,500 horas por ano y que el costo de energia será $0.07 por kilowatt hora. Cada motor durará 12 años. Al final de 12 años el primer motor tendrá un valor residual de $50 y el segundo motor tendrá un valor residual de $100. Considere un MARR de 8% (Nota: 1 hp = 0.7457 kw) What is the annual energy cost for the high efficiency motor (understand the following answers as negative values)? ¿Cuál es el costo anual de energia para el motor de alta eficiencia (entienda las siguientes contestaciones como valores negativos)? $1,403 $1.500 o $1.132 $1.106 0:40 PM

Answer 1

Annual power cost of high efficiency motor = 10 * 0.7457 * 2500 * 0.07 / 0.93 = 1403.20 ~ 1403

First option is correct answer