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FROM wp_posts INNER JOIN wp_postmeta ON ( wp_posts.ID = wp_postmeta.post_id )
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WHERE term_taxonomy_id IN (47485,47486)
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( wp_postmeta.meta_key = \'the_author\' AND wp_postmeta.meta_value = \'1152197\' )
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GROUP BY wp_posts.ID
ORDER BY wp_posts.post_date DESC
LIMIT 0, 6'
EROEI of electricity generation
“Energy Return on Energy Investment (EROEI) is calculated as the ratio between energy inputs and energy outputs for an energy generating technology. A process that uses more energy than it produces is by definition unsustainable in the long term. Technologies which require fuel generally have a lower EROEI than those which can extract “free” energy from the environment (wind, waves, tides, sunlight). As part of this study we have a carried out a review of published EROEIs and have found a high EROEI for marine technologies, lower EROEIs for solar and nuclear power, and still lower for coal and gas.
July 18, 2010
