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Category: energy – Page 274

New Zealand startup eyes global wireless electrical grid

A startup energy company in New Zealand believes it can power the world with a wireless electric transmission system that can bring power to hard-to-reach areas and do so at lower cost than with traditional power lines.

The startup, Emrod, has teamed up with a leading power supply company to test power using a series of antennas. The only limiting factor is the antennas must be within line of sight with each other.

The system consists of a , a transmitting antenna, multiple relay stations, and a receiving antenna, often referred to as a “rectenna.”

New Luxury Prop Plane Boasts Speed of a Jet, Fuel Efficiency of a Car And Fraction of Costs

Otto Aviation’s Celera 500L could carry six business passengers at 450 mph at around 20 miles per gallon thanks to a new high-efficiency piston engine.

A new space-aged propeller plane could overtake business jets at a fraction of the running costs.

California-based Otto Aviation claims its prototype Celera 500L can cruise at 450 mph, with a continental range of 4,500 miles.

Reaction Engines testing ammonia as carbon-free aviation fuel

Reaction Engines and Britain’s Science and Technology Facilities Council (STFC) have completed a concept study into the practicality of using ammonia as a jet aviation fuel. By teaming Reaction Engines’s heat exchanger technology with STFC’s advanced catalysts, they hope to produce a sustainable, low-emission propulsion system for tomorrow’s aircraft.

Modern jet engines use a variety of fuels based on kerosene that have a very high energy density that can propel aircraft well beyond the speed of sound and carry passengers and cargoes across the globe. Unfortunately, such fuels are also derived from fossil fuels and produce significant carbon dioxide emissions, which the airline industry and many governments have pledged to reduce radically by 2050.

One way of achieving these cuts is to look at alternatives to conventional jet fuels to power airliners. The problem is that most of these alternatives have much lower energy densities than standard aviation fuels and suffer from other drawbacks. For example, present-day battery technology would require future aircraft to be very small, short-range, and with little payload capacity. Meanwhile, liquid hydrogen could be a viable alternative, but so much of it would need to be carried that planes would have to be completely redesigned and new infrastructure built.

In a Lab on Earth, Scientists Just Replicated Pressures Found on White Dwarf Stars

For the first time, pressure over 100 times that found in Earth’s core has been generated in a lab, setting a new record.

Using the highest-energy laser system in the world, physicists briefly subjected solid hydrocarbon samples to pressures up to 450 megabars, meaning 450 million times Earth’s atmospheric pressure at sea level.

That’s equivalent to the pressures found in the carbon-dominated envelopes of a rare type of white dwarf star — some of the densest objects in the known Universe. It could help us to better understand the effect those pressures have on changes in the stars’ brightness.

The Future of Rocket Technology

For the past 70 years, most of humanity’s rockets have been chemical rockets- with either liquid or solid fuel. However, it may be possible for future rockets to use different fuel sources.

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Here comes the Army’s first laser battalion

The Defense Department expects to stand up its first battalion of Stryker vehicles outfitted with high-powered laser weapons by some time next year, Army officials say.

“Expect to have the first battalion fielded in 2021 with four battalions by 2023,” U.S. Army Space and Missile Defense Command chief Lt. Gen. Dan Karbler told the audience at the virtual Space Missile Defense symposium on Tuesday.

The so-called “laser battalion,” as Defense One described it, would eventually deploy the new 50 kw Directed Energy-Maneuver Short-Range Air Defense (DE-MSHORAD) Stryker that the Army is working to field by 2022, a ten-fold power increase over the 5 kw-class system that artillery soldiers have been testing in Germany since early 2018.

Researchers have a bold proposal to tackle one of the biggest barriers to more renewable energy

The phrase “too much of a good thing” may sound like a contradiction, but it encapsulates one of the key hurdles preventing the expansion of renewable energy generation. Too much of a service or commodity makes it harder for companies to sell them, so they curtail production.

Usually that works out fine: The market reaches equilibrium and economists are happy. But external factors are bottlenecking renewable electricity despite the widespread desire to increase its capacity.

UC Santa Barbara’s Sangwon Suh is all too familiar with this issue. The professor of industrial ecology has focused on it and related challenges for at least the past two years at the Bren School of Environmental Science & Management. “Curtailment is the biggest problem of renewable we are facing,” said Suh, who noted it will only escalate as renewable energy capacity increases.