Was doing electrolysis William Robert GroveAnd in a way discovered fuel cell as reverse of it
Introduction What is a fuel cell ? How it works ? What are the functions of it ? How it can be used for driving vehicle ? What are the basic components of a FCV ? What are advantages of using it over conventional IC engines ?
Fuel cell Make use of Electrochemical processHydrogen + oxygen water + electricity+ heat Storage tank AirProvide energy for systems as large as autility power station and as small as a laptop
Fuel cell vehicle FCVs are the vehicle which run on thehydrogen rather than gasoline Emits no harmful gases It uses PEM fuel cell [Source: www.futurecars.com ]
Concept of fuel cell vehicle Cells are grouped intostack. A hydrogen fuel cellautomobile would have atleast 45 cells in a stack. Hydrogen is stored andinjected in either liquid orgas form. Output is only water orvapor [ Source: Automotive fuel cell corporation ]
Working of fuel cell vehicle•Hydrogen fuel and oxygen from air are channeledthrough field flow plates on opposite sides of fuel cell.•At anode hydrogen splits into hydrogen ion (positiveion) and into electron (negative ion).•Electrons travel through an external circuit creatingelectric current.•At cathode water is formed.•This electrical energy is converted into mechanicalenergy with the help of electric motors.
Components of fuel cell FCV [ Source: “ABCs of Automotive Fuel cells” Ron Sims
Hydrogen storage tank Carbon fiber composite tank Plastic liner Aluminum polar bosses Pressure around 10000 psi [ Source: “Composite Comfortable Pressure Vessel” U. S. Patent No.5 ]
Fuel cell vehicle efficiency Fuel cell efficiency Eff. = Vactual /1.2 v Electric work done = charge *voltage = -2FE Joules Fuel cell system efficiencyAlso called Plant to wheel efficiency [ Source: American national standards institute ]
Refueling of HFCV Hydrogen can be used as on board fuel A flexible connection between car and dispenser Only few refueling stations over worldwide [ Source: EV World, “Hydrogen Car Fire Surprise” ]
Comparative analysis of FCV Well to wheel efficiency FCV is 22 % efficient ICE is 15 % efficient
Advantages & disadvantages of FCVAdvantages Efficiency is largely independent of load Less complicated then ICE vehicle Quitter operation No structural weaknesses Zero emissionDisadvantages High cost On board hydrogen storage Production of hydrogen at energy plants creates much CO2 H2 is very flammable gas
Status of fuel cell vehicle technology Performance Reliability Safety Longevity Comfort Package/weight Freeze start Cost Range
Technological challenges Vehicle cost On board hydrogen storage Fuel cell durability & reliability Getting hydrogen to consumers Public acceptance [ Source: Photo courtesy of HONDA ]