Third Generation PV and Other Ways to Utilize Solar Energy Solar - - PowerPoint PPT Presentation

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Third Generation PV and Other Ways to Utilize Solar Energy Solar - - PowerPoint PPT Presentation

Third Generation PV and Other Ways to Utilize Solar Energy Solar Thermal Energy I - Basic Principles Week 6.2.1 Arno Smets Heat T 2 Temperature, T Solid sensible Phase-change heat latent heat T* Liquid sensible heat T 1 Storage heat,


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Arno Smets

Third Generation PV and Other Ways to Utilize Solar Energy

Solar Thermal Energy I - Basic Principles

Week 6.2.1

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Heat

𝑅 = π‘›πœ‡

T1 T* T2 Solid sensible heat Liquid sensible heat Phase-change latent heat

Temperature, T Storage heat, Qs

𝑅 = π‘›π·π‘ž π‘ˆ2 βˆ’ π‘ˆ

1

Sensible heat: Latent heat:

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Conduction

Fourier’s law π‘…π‘‘π‘π‘œπ‘’ = βˆ’π‘™π΅ π‘’π‘ˆ 𝑒𝑦

20 Β°C 0 Β°C x

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Convection

Forced convection Natural convection

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Convection

Forced convection Natural convection

Newton’s law π‘…π‘‘π‘π‘œπ‘€ = βˆ’β„Žπ΅βˆ†π‘ˆ

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Radiation

http://en.wikipedia.org/wiki/Thermal_radiation

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Radiation

Black body: 𝐹𝑐 = πœπ‘ˆ4 Grey body: 𝑅 = 𝜁𝐡𝜏(π‘ˆ2

4 βˆ’ π‘ˆ 1 4)

Οƒ = 5.6697x10-8 W/m2K4

http://en.wikipedia.org/wiki/Thermal_radiation