Sustainable Energy - Without the Hot Air
2.2. The balance sheet http://www.ck12.org 2.2 The balance sheet Nature cannot be fooled Richard Feynman Let’s talk about energy ...
http://www.ck12.org Chapter 2. Numbers, Not Adjectives As we estimate our consumption of energy for heating, transportation, man ...
2.2. The balance sheet http://www.ck12.org a much bleaker picture. This picture says “it doesn’t matter what the economics of s ...
http://www.ck12.org Chapter 2. Numbers, Not Adjectives People use the two terms energy and power interchangeably in ordinary spe ...
2.2. The balance sheet http://www.ck12.org The longer the toaster is on, the more energy it uses. You can work out the energy us ...
http://www.ck12.org Chapter 2. Numbers, Not Adjectives energy like electricity. It’s a convenient but sloppy shorthand to talk a ...
2.2. The balance sheet http://www.ck12.org website.) The one thing Iamsure of is that the answers to our sustainable energy ques ...
http://www.ck12.org Chapter 2. Numbers, Not Adjectives 2.3 Cars For our first chapter on consumption, let’s study that icon of m ...
2.3. Cars http://www.ck12.org What about theenergy per unit of fuel(also called thecalorific valueorenergy density)? Instead of ...
http://www.ck12.org Chapter 2. Numbers, Not Adjectives Good point. When I estimate the energy consumed by a particular activity, ...
2.3. Cars http://www.ck12.org jet fuel: 10.4 kWh/l; petrol: 9.7 kWh/l. When looking up calorific values, you’ll find “gross calo ...
http://www.ck12.org Chapter 2. Numbers, Not Adjectives 2.4 Wind The UK has the best wind resources in Europe. Sustainable Develo ...
2.4. Wind http://www.ck12.org the year – see figure for a histogram. But some spots do have wind speeds above 6 m/s – for exampl ...
http://www.ck12.org Chapter 2. Numbers, Not Adjectives Figure 4.3:Chapter Wind’s conclusion: the maximum plausible production fr ...
2.4. Wind http://www.ck12.org Figure 4.6:Histogram of Cambridge average wind speed in metres per second: daily averages (left), ...
http://www.ck12.org Chapter 2. Numbers, Not Adjectives 2.5 Planes Imagine that you make one intercontinental trip per year by pl ...
2.5. Planes http://www.ck12.org Figure 5.1:Taking one intercontinental trip per year uses about 30 kWh per day. Just as Chapter ...
http://www.ck12.org Chapter 2. Numbers, Not Adjectives TABLE2.4: energy per distance (kWh per 100 p-km) Car (4 occupants) 20 Rya ...
2.5. Planes http://www.ck12.org Figure 5.4:Ryanair Boeing 737-800. Photograph by Adrian Pingstone. What about frequent flyers? T ...
http://www.ck12.org Chapter 2. Numbers, Not Adjectives 2.6 Solar We are estimating how our consumption stacks up against conceiv ...
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