Transcription of Energy Transfer and Conversion Methods
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Energy Transfer and Conversion Methods
Energy Transfer and Conversion Methods MIT 9/16/2010. Sustainable Energy Fall 2010 Conversion 1. Mission of this Session Introduce the importance and challenges of Energy Conversion Diffuse Energy sources Thermodynamic limits Rate processes 2. Sustainable Energy Fall 2010 Conversion Energy Conversion Energy Conversion is the process of changing Energy from one form to another Energy Energy Useful Source Conversion Energy 3. Sustainable Energy Fall 2010 Conversion Historic Energy Conversion Sequences Biomass heat (esp.)
Fluxes of heat, material, electrons must be driven by gradients in free energy dT • Fourier’s law of heat conduction q = −k dx • Fick’s law of diffusion j = −D dC dx • d s ρD dP Flowin pipe = − 2 D2 P µf Re dx I dV • Ohm’s law of current flow A = −σ dx Consequence: the …
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