Aggregates Manager Digital Magazine
Issue link: http://read.dmtmag.com/i/772143
28 AGGREGATES MANAGER / January 2017 TECHNOLOGY excavator — just connect them by cable to the electric grid. Because of their high maneuverabil- ity, wheel loaders used in the Electric Site would be hybrid units. But for highly mobile units such as wheel loaders and haulers, attaching a cable was not a possibility. Volvo met the wheel loader challenge with a hybrid prototype, which it says will increase fuel efficiency by 50 percent over convention- al wheel loaders. But the hauler was another story. The logistics of using an electrified larger hauler were impossible: In order to power a 50-ton hauler, you would need roughly 15 tons of batteries. If you used smaller bat- teries, the trade-off would be more in-between cycle charges and a decrease in productivity. That solution would also require high charging powers, putting too much demand on the power grid. "We realized we had to go down in machine size," Sjoberg says, but for manned machines that also meant additional operators and labor costs. All this pushed the researchers toward a battery-electric, Hit the road with: collect them all! Flexible payment plans Downtime reimbursement Online certificates Flexible payment plans Downtime reimbursement Online certificates Hit the road with: collect them all! Protecting the rig that runs your business! Protecting the rig that runs your business! Protecting the rig that runs your business! Protecting the rig that runs your business! Progressive Casualty Ins. Co. & affi liates. All coverage subject to policy terms. 1-800-PROGRESSIVE 1-800-PROGRESSIVE PROGRESSIVE.com This overview highlights how equipment is used during various shifts at the Electric Site.