E QUIPMENT P URCHASE / R EPLACEMENT O PTIONS EGR 403 P ROJECT P ROPOSAL T EAM 13

T EAM M EMBERS  Sumeet Kals Tech  Eduardo RoblesOrganizer  Arin Saghatelian Summarizer

P ROPOSAL T OPIC Economic comparison of rewinding vs. replacement of a motor

P ROJECT O UTLINE  Marginal cost for motor replacement versus motor repair  Cost of saved energy of energy-efficient motors versus rewinds of standard motors  Expected lifetime of repaired motor versus that of a replacement

When is rewinding more economical?  The original motor is already a high- efficiency unit  The motor runs only a few hours a year  The rewind shop can guarantee that its rewind will not degrade efficiency

When is replacement more economical?  The original motor is a low-efficiency motor  The cost of motor repair exceeds the cost of a new replacement  The motor has a high duty factor (it runs a considerable amount of hours per year)

R ESOURCES  Class textbook: “Essentials of Engineering Economic Analysis”, 2 nd ed.  Internet resources  Motor Data from Smurfit Newsprint Corp.