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Energy Systems Categorized

I have been using the following outline to lecture + write about energy, including in a book manuscript. Would welcome any + all suggestions on modification or expansion. Thanks.

Non-Animate Energy Systems Categorized

Energy efficiency + demand flexibility faster, easier, cheaper: 

negawatts + flexiwatts + negabarrels

Current solar energy [almost] all sustainable energy types: biofuels,

hydropower, wave power, ocean thermal energy conversion [OTEC],

photovoltaic, concentrating solar, wind

Ancient solar energy consists of fossil fuels: coal, natural gas, 

conventional oil, bitumen oil, kerogen oil

Nuclear fission possible due ancient type II supernovae producing

Th-90 + U-92 + Pu-94 [basis of fuel cycles]

Geothermal energy originates from compressive accretional

formation of planet, coupled with extensive suite of 

radioactive substances decaying over eons

Tidal energy derives at root solely from gravitational interactions 

between Sun + Earth + Moon 

Piezoelectric + thermoelectric + thermomagnetic + triboelectric

generation — niche technologies from materials science

Hydrogen [fuel cells] + electricity [secondary forms of energy]


 

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