Abstract: Using high-speed on-off valves (HSVs) with small size, low cost, and high switching accuracy instead of expensive proportional/servo valves, and researching high-performance vacuum servo ...

DENVER — Xcel Energy crews have restored power for about 90% of the 89,000 customers impacted by a "very severe weather event" on Friday afternoon resulted in outages that far exceed the planned ...

Over 80,000 homes or businesses are still without power in Colorado on Saturday, three days after the start of a major wind event that saw over 100,000 customers experiencing outages, either planned ...

Abstract: The paper presents a mathematical model of a piston compressor which is a part of an oxygen gas generator. Taking into account the structural parameters of the compressor, as well as the ...

MADRAS, Ore. (KTVZ) -- Portland General Electric and The Confederated Tribes of Warm Springs said Thursday they are undertaking a complex project to replace the original turbine shutoff valves at ...

DENVER — Xcel Energy is working to restore power to thousands of people on Thursday after strong winds whipped across the metro area with gusts reaching to 100 mph in places west of Denver. As of ...

DENVER (KDVR) — Xcel Energy will shut off power in several areas again on Friday, and some could be without power through the weekend. The company shut off power in several areas Wednesday due to dry, ...