Worried about whether rewinding a motor will degrade its efficiency? Well rewind away. Findings from a study by the Electrical Apparatus Service Association conclude that motors can be rewound multiple times with no loss of efficiency, so long as it's done carefully and operators follow standard procedures. The study examined 50 to 300 hp electric motors with ratings of 1,800 and 3,600 rpm.
Although plastics make up only about 11% of all US municipal solid waste, many are actually more energy-dense than coal. Converting these non-recycled plastics into energy with existing technologies could reduce US coal consumption, as well as boost domestic energy reserves, says a new study.
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