Power Plant Engineering

60 POWER PLANT ENGINEERING 2.15.2 Aerofoil Design A wind turbine changes the kinetic energy of the wind into rotary motion (or t ...

NON-CONVENTIONAL ENERGY RESOURCES AND UTILISATION 61 over time. Reversible hydrogen fuel cells may be an option in the future — ...

62 POWER PLANT ENGINEERING The performance of a wind mill rotor stated as coefficient of performance is expressed as: Cp = A/Pma ...

NON-CONVENTIONAL ENERGY RESOURCES AND UTILISATION 63 more than 300,000 households, as many as in a city the size of San Francisc ...

64 POWER PLANT ENGINEERING 3000 2500 2000 1500 1000 500 0 199019911992199319941995199619971998199920002001 MW/Year Annual wind e ...

NON-CONVENTIONAL ENERGY RESOURCES AND UTILISATION 65 Unlike coal or nuclear plants, public utility companies do not own most win ...

66 POWER PLANT ENGINEERING 2.16 Solar Energy The sun is the source of the vast majority of the energy we use on earth. Most of t ...

NON-CONVENTIONAL ENERGY RESOURCES AND UTILISATION 67 mous amount of energy. This energy is emitted as radiations of different fo ...

68 POWER PLANT ENGINEERING Solar radiation arriving from the sun reaches the earth’s surface as short wave radiation. All of the ...

NON-CONVENTIONAL ENERGY RESOURCES AND UTILISATION 69 Central Receiver Beam Radiation Heliostat Field To w e r ST Fig. 2.12. Cent ...

70 POWER PLANT ENGINEERING point. Water/steam working fluid can also be used. The tubes have evacuated glass enclosure to reduce ...

NON-CONVENTIONAL ENERGY RESOURCES AND UTILISATION 71 There are eight possible pathways for conversion of solar radiation to usef ...

72 POWER PLANT ENGINEERING For passive solar design to be effective certain guidelines should be followed: A building should ha ...

NON-CONVENTIONAL ENERGY RESOURCES AND UTILISATION 73 2.17 Electrochemical Effects and Fuel Cells Fuel cells produce electricity ...

74 POWER PLANT ENGINEERING Cathode: electrode to which cations migrate Anode: electrode to which anions migrate Mnemonic — Reduc ...

NON-CONVENTIONAL ENERGY RESOURCES AND UTILISATION 75 In a fuel cell the chemical energy of the fuel drives the overpotential, wh ...

76 POWER PLANT ENGINEERING Although this means that the system doesn’t have to store large quantities of highly explosive hydro- ...

NON-CONVENTIONAL ENERGY RESOURCES AND UTILISATION 77 Polarization is internal chemical, electrical, thermal effect within the fu ...

78 POWER PLANT ENGINEERING Input power – Polarization losses = Output power and, Output power/Input power = Efficiency(η) Effici ...

NON-CONVENTIONAL ENERGY RESOURCES AND UTILISATION 79 Thermionic conversions is a sealed and evacuated device comprising of A he ...