A reader writes – the history of energy resources and the economy

Dear Hugh Thanks for this. My own view is that relatively low oil prices, which set the bench mark for all other primary energy sources, was the reason why the world economy was able to expand so fast. Energy prices work their way through to all other prices including salaries. and these then work back […]

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Energy is everything – what is really behind the financial crisis – something which eludes bankers and economists

Great article on the present complete inability of economists and politicians to see what is actually going on: See full thing at: http://www.onlineopinion.com.au/view.asp?article=8817&page=1   It is fascinating to watch the behaviour of our political and business leaders as they attempt to cope with the world’s deepening financial crisis. It is becoming clear that they don’t […]

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Water Meters – confusing cause and effect ? Letter from Prof Lesley

Dear Editor, Is today’s front page story another attempt by the Government to tax us more ? UK homeowners (with or without meters) already pay more for water than Continentals. UK water use if wasteful. About 90% of domestic water flushes toilets and washes; ourselves, clothes and dishes. Fortunately the washing machine makers have reduced […]

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How Much Wind Energy is there? – Brian Hurley – Wind Site Evaluation Ltd.

Introduction

The starting point is an estimate of the total quantity of kinetic energy in the atmosphere. Lorenz gives 1.5 x 106Joules/m2 as the quantity of kinetic energy contained in the atmosphere(1). Smil gives a figure described as the annual “solar radiation reaching the earth” as equal to 5.8 x 1024Joules, or 1.84 X 1017W, and 360W/m2(2). Annual Solar radiation absorbed by earths surface(land and sea) 2.9 x 1024Joules, or 9.19 X 1016W, and 180W/m2. Note the solar constant is 1,366W/m2. Smil refers to a source from Lorenz(1976) that “atmospheric motion” was about 2% of 3.5PW insolation. ( Applying 2% to Smil’s 9.19 X 1016W giving 1.84 X 1015W with his figure for winds below 1km 1.22 x 1015W is the right order of magnitude

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Pumping Power calculator – what power is needed to pump seawater to the middle of the Gobi Desert for desalination in the SeaWater Greenhouse? – answer – not a lot

The spread sheet for calculating this, kindly provided by Wessex Water, one of the UK’s leading water supply companies, is available here:       This spread sheet enables you to calculate power needed to pump water any distance through any height: http://tx1.fcomet.com/~claverto/cms/?dl_name=Pipe_Headloss__Power_calculator.xls   You can see that in fact, compared to national energy consumptions, […]

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