Terms: Gas Fuel Cells (2,580), methane fuel cells (240), gas fuel cell (9,770), methane fuel cell (612), natural gas fuel cell (1,190), natural gas fuel cells (1,030),
Terms: alkaline fuel cell (31,100), molten carbonate fuel cell (27,800), proton exchance membrane (5), regenerative fuel cells (2,510),
Terms: phosphoric acid fuel cell (12,600), sodium fuel cell (5), lithium fuel cell (35), air separation (143,000), oxygen enrichment (25,700),
National Energy Technology Center - Hydrogen and Clean Fuels
Terms: Solid State Energy Conversation Alliance (21),
Terms: butane fuel cell (173), gasoline fuel cell (596), hydrocarbon fuel cell (381), diesel fuel cell (1,440),
Terms: hydraulic propulsion (1,060), hydraulic motors (132,000), hydraulic motor (146,000), hydrostatic drive (71,700), brake energy recovery (124),
Terms: hybrid hydraulics (88), hydraulic hybrids (1,650), hydraulic regenerative (410), hydraulic hybrid (25,800), hydraulic transmission (73,900), hydraulic drive (104,000), bent axis hydraulic (77), hydraulic accumulators (36,300), hydraulic hybrid drivetrain (120), hydraulic drivetrain (251),
Terms: hydraulic energy storage (273), hydraulic accumulators (36,300), hydraulic accumulator (23,300), composite pressure vessels (1,360), nitrogen storage (41,500),
NextEnergy - Hydraulic Hybrids
US EPA - Hydraulic hybrid SUV
Hydraulic hybrid promises big savings for UPS
Green Car Congress - Eaton Gets a Boost for Hydraulic Hybrids
Jaguar - Hybrid Hydraulic Vehicles - Report
Boolean: hybrid AND hydraulic (594,000), "wheel" AND motor AND hydraulic (1,450,000), "carbon fiber" AND nitrogen AND pressure (28,900), hybrids AND nitrogen AND psi (2,240),
Terms: closed cycle (115,000), refrigerator technologies (57), generator technologies (1,740),
Terms: micro-turbines (54,900), combustion turbine (138,000), miniature gas turbines (276), gas turbines (795,000), micro gasturbines (19), nano-gasturbines (7), gasturbines (2,760), micro-turbine (33,900), nano-turbine (18),
EPA - Generating Electricity With Coal Mine Methane-Fueled Micro Turbines
Gas turbine - Wikipedia
Hydraulic Technologies - Refrigerants for motors and generators
Terms: in-wheel (370,000), wheel hub (754,000), hydraulic wheel motors (570), hydraulic theory (3,670), hydraulic formulas (573),