Related by context. Frequent words. (Click for all words.) 57 spark ignition 54 conventional internal combustion 54 Thermoelectric 54 PEM fuel 54 hydrogen internal combustion 53 combustor 53 1kW 53 WHE 53 regenerative 53 reciprocating engines 53 external combustion engine 53 2kW 53 gas recirculation 53 electrolyser 53 5kW 53 internal combustion engines 52 brushless motor 52 combustion 52 AuraGen 52 Supercritical 52 R#a 52 electrolyzer 52 reduce NOx emissions 52 cell SOFC 52 electrolyzers 51 Fischer Tropsch process 51 #.#kW [002] 51 subcritical 51 PowerVerde 51 SOFC 50 gas recirculation EGR 50 servomotors 50 solenoid valves 50 Mobion ® 50 gasifiers 50 3kW 50 Heat Exchanger 50 proton exchange 50 thermoelectric materials 50 turbofan engine 49 RASIRC 49 Pulsed 49 de ionized 49 gaseous fuels 49 exothermic 49 algae biomass 49 efficiency 49 circulating fluidized bed 49 internal combustion 49 thermal dissipation 49 Ti VCT 49 Mobion 49 variable geometry turbocharger 49 Pyrolysis 49 ultra capacitors 49 conventional combustion engine 49 compression ignition 49 CoolAir 49 SCR catalyst 48 String Ribbon 48 metal hydride 48 Propulsion System 48 convection cooling 48 porous silicon 48 frequency converters 48 ramjet 48 liquid cooled 48 #oC [001] 48 HID lighting 48 biocrude 48 MultiAir 48 piezo electric 48 NiCd 48 diaphragm pumps 48 induction motors 48 fuel injector 48 oxy fuel 48 microturbine 48 concentrated photovoltaic CPV 48 hybrid powertrains 48 exhaust aftertreatment 48 superconducting wire 48 4kW 48 Variable Cylinder Management 47 HBLED 47 Lithium Ion batteries 47 urea injection 47 ultrasonics 47 lightweight composites 47 battery chemistries 47 proprietary Lithium Ion 47 condensing boilers 47 VRB ESS 47 scramjet engine 47 combustion engine 47 bioprocesses 47 gasifier 47 Biobutanol 47 corrosive abrasive 47 GenSys 47 Mobion R