08 waves biomass - university of cagliari · sugarcane cassava sweet sorghum sweet potato corn...
TRANSCRIPT
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Waves
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Waves
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Waves
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Waves
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Energia dalle onde - sommario
Media
Risorsa al picco Pl= 12ρgh2v = 40kW /m
Pl= 18ρgh2v =10kW /m
Conversione elettrica Pl×η = 3kW /m
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Waves
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Waves
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Waves
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Waves
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Waves
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Waves
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Biomasses and biofuels
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Photosynthesis
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Photosynthesis
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Biomass yields
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Biomass burning: efficiency and available power
e.g. 2kg municipal waste/person/day
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Biomass burning: efficiency and available power
Output power = yield × energy density × mass density × burning efficiency Overall biomass efficiency = Power/Insolation Area = Needed power / Output power
Ex: - wood in Sardinia: yield 10 m3(7 ton)/ha/year, energy density 5 kWh/kg (dry) - sorgo: yield 50ton/ha/year, energy density 5 kWh/kg (dry)
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Biomasse - sommario
Produzione yield = 10 ⋅103Kg
ha × y
Risorsa yield × energydensity =50 ⋅103KWh
104m2 × 24 ⋅365h≈ 0.6 W
m25KWhKg
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Sugarcane
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Ethanol
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Ethanol
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Biodiesel