Downloaded 973 times
More Related Content
Similar to Large scale power generation using fuel cell
Large scale power generation using fuel cell
- 1. PresentedBy: Surbhi Pathak B.TECH 3rdyear Electrical Engg. Roll No. 14905420098
- 2. FOSSIL FUEL RENEWABLES OTHER COAL OIL NATURAL GAS SOLARPV / THERMAL HYDRO WIND NUCLEAR BIO - MASS
- 3. “ A fuelcell is a device that converts the chemical energy from a fuel into electricity through a chemical reaction with oxygen or another oxidizing agent. ” 3 Fuel Fuel cell Energy
- 4. Fuel cellconsists of electrodes, electrolyte & catalyst to facilitate the electrochemical redox reaction. The basic arrangement in a fuel cell can be represented as follows: Fuel Electrode Electrolyte Electrode Oxidant
- 5. • Anode – Negativepost of the fuel cell. – Materials which have high electron conductivity & zero proton conductivity . • Cathode – Positive post of the fuel cell. – Have high electron conductivity & zero proton conductivity. • Electrolyte – Proton exchange membrane. – Specially treated material, only conducts positively charged ions. – Membrane blocks electrons. • Catalyst – Special material that facilitates reaction of oxygen and hydrogen – Usually platinum powder very thinly coated onto carbon paper or cloth.
- 6. Pressurized hydrogengas (H2) enters cell on anode side. Gas is forced through catalyst by pressure. ◦ When H2 molecule comes contacts platinum catalyst, it splits into two H+ ions and two electrons (e-). Electrons are conducted through the anode ◦ Make their way through the external circuit (doing useful work such as turning a motor) and return to the cathode side of the fuel cell. On the cathode side, oxygen gas (O2) is forced through the catalyst ◦ Forms two oxygen atoms, each with a strong negative charge. ◦ Negative charge attracts the two H+ ions through the membrane, ◦ Combine with an oxygen atom and two electrons from the external circuit to form a water molecule (H2O).
- 7.
- 8.
- 11. • 2H2 →4H+ + 4e-At anode • O2 + 4H+ + 4e- → 2H2O At Cathod e • 2H2 + O2 → 2H2O Overall Reactio n Large number of these cells are stacked together in series to make a battery called as fuel cell battery or fuel battery.
- 18. Fuel Cells Applicationin India Commercial establishments Shops in Malls and Underground bazaars 1 to 3 kW systems / around 1,00,000 Small Business Establishments 5-10 kW systems / 50,000 Entertainment Industry 25-50 kW systems / 500 to 1,000 Hotels, restaurants & Resorts 100-200 kW systems / up to 500 units Hospitals 200-500 kW systems / up to 200 units Residential Complexes 50-200 kW systems / 30,000 to 50,000
- 19. 220-kW hybrid systemwith a Solid Oxide Fuel Cell (SOFC) generator and a down- stream micro-turbine SOFC stack
- 20. 1. High efficiencyof energy conversion (approaching 70%) from chemical energy to electrical energy. 2. Low noise pollution & low thermal pollution. 3. Fuel cell power can reduce expensive transmission lines & minimize transmission loses for a disturbed system. 4. Saves fossil fuels. 5. Fuel cells are less polluting. Mostly the byproducts are water & waste heat, which are environmentally acceptable .
- 21. 6. Hydrogen-Oxygen fuelcells produce drinking water of potable quality. 7. Low maintenance cost. 8. Fuel cells automotive batteries can render electric vehicles, efficient & refillable.
- 22. High initialcost. Life times of the cells are not accurately known. Large weight and volume of gas fuel storage system. High cost of pure hydrogen. Pure hydrogen is difficult to handle. Hydrogen often created using “dirty” energy (e.g., coal)
- 23. Fuel cells havemany advantages over conventional power generating equipment: high efficiency, low emissions, flexibility, high reliability, low maintenance, and multi-fuel capability. Because of their efficiency and environmental advantages, fuel cell technologies are viewed as an attractive 21st century solution to energy problems.
- 24.
- 25.