Fuel Cells Why? No moving parts Long lifetime /reliability High efficiency(40-70%) No Carnot cycle limitations(efficiency independent of size) heat available for cogeneration ow emissions PAFC: 1 ppm Nox, 4 ppm cO,< 1 ppm non-methane reactive organic gasesFuel Cells - Why? No moving parts Long lifetime/reliability High efficiency (40 - 70%) No Carnot cycle limitations (efficiency independent of size) heat available for cogeneration Low emissions PAFC: < 1 ppm Nox, 4 ppm CO, < 1 ppm non-methane reactive organic gases