China’s high-speed rail removes dense short-haul corridors from aviation while helping define the regional routes where electric aircraft can make more sense.
The electric-aviation contest is often presented as a race between aircraft startups. That is probably the wrong unit of analysis. An airplane that flies once, wins a certification milestone or accumulates a large order book has demonstrated something useful, but it has not demonstrated an industry. What matters is whether … [continued]
Cheap working fluids do not make cheap electricity storage. Compression, thermal management, containment and expansion turn apparently simple gas storage into process infrastructure.
Two years ago I called compressed-gas electricity-storage claims mostly hot air. Since then the sector has produced exactly the sort of evidence that should force a reassessment rather than a repetition of the old argument. China has commissioned the 600 MW / 2.4 GWh Huai’an compressed-air demonstration, Hydrostor has pushed … [continued]
Hydrogen passenger aviation only reaches commercial scale if three sequential gates all open: an operator-ready aircraft, a throughput-capable airport fuel network, and a fleet large enough for meaningful scheduled service.
The UK Civil Aviation Authority announced its latest Hydrogen Challenge in the same week as I published my updated assessment of hydrogen passenger aviation. The regulator is examining hydrogen-aircraft turnarounds at London City Airport, cryogenic hydrogen storage and airside supply, while its broader hydrogen aviation roadmap targets scaled operations for … [continued]
ARES has demonstrated roughly 340 tonnes of mass moving through about 36 metres of elevation. The result is only about 33 kWh of gross stored energy.
ARES North America has now operated enough of its GravityLine system at Gamebird Pit in Nevada to make clear its deep limitations to people who didn’t simply do the grade 7 math and science calculations. Sandia National Laboratories documents a pair of mass cars weighing roughly 340 tonnes climbing a … [continued]
Dense-fluid pumped hydro is squeezed from both sides: shorter durations strengthen battery competition, while true long-duration storage drives mineral demand upward and strengthens conventional pumped hydro.
RheEnergise deserves credit for something a lot of energy-storage startups never accomplish: it built the thing. At Cornwood in Devon, the company constructed upper and lower reservoirs, installed pumps, pipes and generating equipment, manufactured hundreds of cubic metres of its proprietary high-density fluid, pumped that fluid uphill and ran it … [continued]
For the same 25 MW / 100 MWh four-hour service, Energy Vault’s Rudong project requires far more capital, land, machinery and construction carbon than a contemporary Chinese BESS.
Energy Vault’s Rudong gravity-storage project is a particularly useful technology test because it removes many of the excuses that can surround a first-of-kind energy project. It was built in China, with deep domestic supply chains for concrete, steel, motors, power electronics and industrial construction. It had government support, grid coordination … [continued]
Electric freight rail is established technology. The unresolved North American question is where electrification pays first, not whether electric traction works.
Direct electric freight rail is not speculative technology. It already operates across enormous railway systems, moves very heavy freight and works in difficult climates. The interesting North American question is therefore not whether electric freight rail can work, but where catenary should go first, where batteries or dual-mode locomotives make … [continued]
Hydrogen and electrification occupy surprisingly similar amounts of attention despite radically different levels of physical deployment.
Hydrogen occupies an unusually large share of the energy-transition information stream for the amount of physical deployment behind it. Fuel-cell trucks, buses, trains, ships, storage projects, demonstrations and records recur through corporate releases, government announcements, trade publications and mainstream reporting, creating the impression that hydrogen remains a substantial parallel pathway … [continued]
Heart Aerospace’s X1 represents the less glamorous but more consequential aviation transition: electrifying an existing market rather than inventing a new one.
Heart Aerospace’s X1 demonstrator flew for 27 minutes on August 12 from Plattsburgh International Airport, powered entirely by batteries. The aircraft has a 106-foot wingspan, weighed more than 25,000 pounds at takeoff and drew more than a megawatt at peak. Heart calls it the largest battery-electric aircraft ever flown. The … [continued]
Across 25 assessed power systems, planning, markets and project pipelines are consistently more mature than the delivered portfolios needed to provide dependable flexibility.
Grid flexibility is easy to mistake for a technology market. One jurisdiction announces several gigawatt-hours of batteries, another creates a new ancillary-service product, and a third launches a capacity auction, pumped-hydro program or demand-response target. Those are meaningful signs of activity, but they do not answer the harder question: can … [continued]
