The electric fuel cell propulsion system onboard the Ion Tiger has the low noise and signature of a battery-powered UAV, while taking advantage of hydrogen, a high-energy fuel
The system employs a combination of thermal insulation and an enclosure for the storage and controlled distribution of hydrogen as a high-energy fuel
ThermoFuel is an innovative renewable energy process that converts waste activated sludge into a low-moisture, high-energy fuel
that meets EQ Class A standards and can be used by cement and power plants.
Metallic Power incorporated their high-energy fuel
cells into a Toro prototype electric mower to show the viability of using alternative fuels to power this type of equipment.
Its patented K-fuel process converts low-heating value coal into clean, high-energy fuel
The common features of both of these new launcher systems include the cryogenic upper stage, which is powered by high-energy fuels
(liquid oxygen/liquid hydrogen).
The authors devote a chapter to each of these projects as well as another chapter to high-energy fuels
The group points out that low-energy materials like wood and charcoal actually release more pollution by volume than high-energy fuels
like propane and natural gas.