Energy http://machinedesign.com/taxonomy/term/8210/more en Energiewende versus energy hodgepodge http://machinedesign.com/editorial-comment/energiewende-versus-energy-hodgepodge <div class="node-body article-body">The XL pipeline’s south leg has been fixed, but the north leg is on hold — even while the EPA makes proposals that effectively promote natural gas. Meanwhile, Germany’s Energiewende (energy transition) program threatens the stability of energy prices. Who’s making the better call?</div> <div class="og_rss_groups"></div><p><a href="http://machinedesign.com/editorial-comment/energiewende-versus-energy-hodgepodge" target="_blank">read more</a></p> http://machinedesign.com/editorial-comment/energiewende-versus-energy-hodgepodge#comments Editorial Comment Energy Mon, 23 Jun 2014 16:09:00 +0000 38501 at http://machinedesign.com Motors Not Turbines Drive Heavy Equipment http://machinedesign.com/mechanical-drives/motors-not-turbines-drive-heavy-equipment <div class="field-byline"> Sumit Singhal, Consulting Engineer, Siemens Industry Inc., Norwood, Ohio </div> <div class="field-deck"> Electric motors with magnetic bearings can drive high-speed shafts in heavy equipment. </div> <div class="node-body article-body">High-speed rotating machinery presents tough challenges for engineers, particularly in heavy equipment that draws many megawatts of power. One option is to eschew the turbines that traditionally power such applications and instead use electric motors paired with variable-frequency drives (VFDs). </div> <div class="og_rss_groups"></div><p><a href="http://machinedesign.com/mechanical-drives/motors-not-turbines-drive-heavy-equipment" target="_blank">read more</a></p> http://machinedesign.com/mechanical-drives/motors-not-turbines-drive-heavy-equipment#comments Energy Mechanical Drives Motors/Drives Mon, 23 Jun 2014 14:22:00 +0000 38441 at http://machinedesign.com Could Magnetic Gears Make Wind Turbines Say Goodbye to Mechanical Gearboxes? http://machinedesign.com/motorsdrives/could-magnetic-gears-make-wind-turbines-say-goodbye-mechanical-gearboxes <div class="field-deck"> They can be lighter and less prone to maintenance problems than ordinary planetary devices. </div> <div class="node-body article-body">Magnetic gears can be overtorqued with the only deleterious effect being a slipping between the input and output. And they promise to be no bigger than their mechanical counterparts.</div> <div class="og_rss_groups"></div><p><a href="http://machinedesign.com/motorsdrives/could-magnetic-gears-make-wind-turbines-say-goodbye-mechanical-gearboxes" target="_blank">read more</a></p> http://machinedesign.com/motorsdrives/could-magnetic-gears-make-wind-turbines-say-goodbye-mechanical-gearboxes#comments Energy Motors/Drives Thu, 19 Jun 2014 13:57:00 +0000 38341 at http://machinedesign.com Tracking energy generated and used in the U. S. for 2013 http://machinedesign.com/technologies/tracking-energy-generated-and-used-u-s-2013 <div class="node-body article-body"><div class="related-content"> <div class="related-label">Related</div> <p><a href="http://machinedesign.com/batteriespower-supplies/harvesting-energy-wireless-sensors">Harvesting energy for wireless sensors</a></p> <p><a href="http://machinedesign.com/batteriespower-supplies/difference-between-electrical-power-and-electrical-energy ">The difference between electrical power and electrical energy</a></p></div></div> <div class="og_rss_groups"></div><p><a href="http://machinedesign.com/technologies/tracking-energy-generated-and-used-u-s-2013" target="_blank">read more</a></p> http://machinedesign.com/technologies/tracking-energy-generated-and-used-u-s-2013#comments Technologies Energy Thu, 08 May 2014 21:01:00 +0000 37401 at http://machinedesign.com Tiny battery lets researchers track salmon http://machinedesign.com/energy/tiny-battery-lets-researchers-track-salmon <div class="node-body article-body"><p><strong><img alt="" src="/site-files/machinedesign.com/files/uploads/2014/03/Battery-tiny.jpg" style="width: 400px; height: 321px; margin: 5px; float: right;" title="The microbattery, which will be injected into salmon to track their movements, sits amid grains of rice." />Army Corps of Engineers</strong>&rsquo; researchers in Washington Sate have been surgically implanting battery-powered transmitters into salmon to track and monitor their moments through rivers and the ocean. But those batteries were too big and weak to meet some of the researchers&rsquo; goals.</p></div> <div class="og_rss_groups"></div><p><a href="http://machinedesign.com/energy/tiny-battery-lets-researchers-track-salmon" target="_blank">read more</a></p> http://machinedesign.com/energy/tiny-battery-lets-researchers-track-salmon#comments Batteries/Power Supplies Energy Tue, 25 Mar 2014 16:23:00 +0000 35841 at http://machinedesign.com Solar modules for beaming power to Earth http://machinedesign.com/energy/solar-modules-beaming-power-earth <div class="node-body article-body"><p><img alt="" src="/site-files/machinedesign.com/files/uploads/2014/03/Solar-modules.jpg" style="width: 400px; height: 133px; margin: 5px; float: right;" title="The solar modules can be folded for transport then unfolded in space to efficiently radiate excess heat away." />A researcher at the <strong>Naval Research Laboratory</strong> has constructed a module designed to be put in orbit around Earth and collect solar power, transform it into microwaves, and transmit them to Earth where they would be converted to usable electricity.</p></div> <div class="og_rss_groups"></div><p><a href="http://machinedesign.com/energy/solar-modules-beaming-power-earth" target="_blank">read more</a></p> http://machinedesign.com/energy/solar-modules-beaming-power-earth#comments Energy Tue, 25 Mar 2014 16:11:00 +0000 35831 at http://machinedesign.com Magnetic refrigeration heats up http://machinedesign.com/energy/magnetic-refrigeration-heats <div class="field-deck"> If current research efforts are successful, within a few years you may find compressors and evaporators only in refrigeration museums. </div> <div class="node-body article-body"><p>The traditional vapor-compression cycle used in refrigeration may be relegated to the history books if researchers are right about magnetic (magnetocaloric) refrigeration. At least one major appliance maker plans to commercialize magnetic refrigeration for use in the home. The rationale for the change is that the technology uses no refrigerants or compressors and is said to be 20% more efficient than conventional techniques. It could also work well in HVAC.</p></div> <div class="og_rss_groups"></div><p><a href="http://machinedesign.com/energy/magnetic-refrigeration-heats" target="_blank">read more</a></p> http://machinedesign.com/energy/magnetic-refrigeration-heats#comments Energy Motors/Drives Fri, 21 Mar 2014 14:23:00 +0000 35601 at http://machinedesign.com Getting fuel-cells from concept cars to showrooms http://machinedesign.com/automotive/getting-fuel-cells-concept-cars-showrooms <div class="field-byline"> Sam Davis, Editor-in-Chief, Power Electronics Technology (powerelectronics.com) </div> <div class="node-body article-body"><p>Fuel-cell technology has been around for over a century. But only in the last few decades have fuel cells become common in space and military platforms.</p></div> <div class="og_rss_groups"></div><p><a href="http://machinedesign.com/automotive/getting-fuel-cells-concept-cars-showrooms" target="_blank">read more</a></p> http://machinedesign.com/automotive/getting-fuel-cells-concept-cars-showrooms#comments Automotive Energy Fri, 28 Feb 2014 17:30:00 +0000 35061 at http://machinedesign.com Triboelectric generators use friction to create electricity http://machinedesign.com/energy/triboelectric-generators-use-friction-create-electricity <div class="node-body article-body">Triboelectric generators use friction to create electricity</div> <div class="og_rss_groups"></div><p><a href="http://machinedesign.com/energy/triboelectric-generators-use-friction-create-electricity" target="_blank">read more</a></p> http://machinedesign.com/energy/triboelectric-generators-use-friction-create-electricity#comments Energy Tue, 17 Dec 2013 15:03:00 +0000 32821 at http://machinedesign.com Hybrid aircraft proves gas/electric flight is practical http://machinedesign.com/energy/hybrid-aircraft-proves-gaselectric-flight-practical <div class="node-body article-body">Hybrid aircraft proves gas/electric flight is practical</div> <div class="og_rss_groups"></div><p><a href="http://machinedesign.com/energy/hybrid-aircraft-proves-gaselectric-flight-practical" target="_blank">read more</a></p> http://machinedesign.com/energy/hybrid-aircraft-proves-gaselectric-flight-practical#comments Energy Fri, 08 Nov 2013 16:31:00 +0000 32032 at http://machinedesign.com