ES 200 Lecture Notes - Lecture 8: Corporate Average Fuel Economy, Storage Tank, Water Turbine
3 Nov 2015
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Energy use: introduction (lecture 1: tragedy of the commons, brundtland report, 1987, published the report our common future, defined sustainable development kgoe = kilogram of oil equivalent. About 100 watts: a 60w lightbulb consumes 60 j/s, often multiply watts by a unit of time (typically hours) to yield energy. Wh = watt hours kwh = wh/1000: that 60w lightbulb left on for 4 hours consumes: Units for energy/power: common energy units, calorie, joule, kwh, btu, quad, pj, common power unites, w, hp. Industrial revolution: required better prime movers, enabled by steam engine, myriad stationary applications, after 1830, revolutionized land and water applications, eventually supplanted by other devices, steam turbines for stationary applications, internal combustion engines for transportation. Efficiency: energy conservation refers to reducing energy consumption by using less of an energy service, driving less, energy efficiency refers to using less energy for a constant service, driving the same amount with a higher mileage vehicle.
