Renewable exergy Mechanical Engineering ME562Sustainable Energy: - - PowerPoint PPT Presentation

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Renewable exergy Mechanical Engineering ME562Sustainable Energy: - - PowerPoint PPT Presentation

Nov 16, 2023 1.13k likes •1.48k views

ME 562: Sustainable Energy an Exergy Analysis Spring 2013 Renewable exergy Mechanical Engineering ME562Sustainable Energy: an Exergy Analysis How much is there? short wave long wave solar radiation 174,000 TW tidal energy direct

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Mechanical Engineering ME562Sustainable Energy: an Exergy Analysis

ME 562: Sustainable Energy – an Exergy Analysis Spring 2013

Renewable exergy

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Renewables 2/30 Mechanical Engineering ME562Sustainable Energy: an Exergy Analysis

How much is there?

EARTH Fossil fuels Nuclear, thermal & gravitational energy Storage (plants) Storage (water)

solar radiation 174,000 TW direct refmection 52,000 TW direct conversion to heat 82,000 TW photosynthesis 40 TW evaporation, precipitation 40,000 TW wind, waves, convection & currents 370 TW animals decay tides, tidal currents 3 TW volcanoes & hot springs 0.3 TW conduction 32 TW terrestrial energy tidal energy long wave short wave 2 x 1023 J

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Passive solar: the Trombe wall

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Low-temperature active

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Medium temperature - glazed

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High temperature - concentrating

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Solar collector effjciency

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The solar spectrum

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Measurement apparatus

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Terrestrial solar exergy fmows

tropical humid mediterranean mountain tropical dry

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Different weather patterns

sunny day in spring cloudy day in summer

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Geographic dependence of exergy

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Where does the exergy go?

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PV devices – mW to MW

mW MW kW

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Where electrons live

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electrons demographics

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Valence and conduction bands

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The Silicon crystal structure

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Other possible PV materials

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PV cell structure

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Typical PV cells

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Typical performance curves

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The manufacturing process

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Single crystal ingot production

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A single crystal ingot

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Poly-Si ingot & cell

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Making little wafers