Monthly Archives: November 2018

Economics of natural gas blow past solar and wind

“At today’s costs, $1 million invested in a modern wind turbine will produce, over 30 years of operation, about 50 million kWh (kilowatt-hours). And $1 million spent on utility-grade solar panels will produce about 25 million kWh over 30 years. Meanwhile, $1 million spent on a shale rig will produce enough natural gas to generate 400 million kWh over the same 30 years” click here

Low power density of wind makes wind energy unsustainable

Lee M Miller and David W Keith. Observation-based solar and wind power capacity factors and power densities. Environmental Research Letters 13 (2018) 104008.

Power density is the rate of energy generation per unit of land surface area occupied by an energy system. The power density of low-carbon energy sources will play an important role in mediating the environmental consequences of energy system decarbonization as the world transitions away from high power-density fossil fuels. All else equal, lower power densities mean larger land and environmental footprints. The power density of solar and wind power remain surprisingly uncertain: estimates of realizable generation rates per unit area for wind and solar power span 0.3–47 We m−2and 10–120 We m−2 respectively. We refine this range using US data from 1990–2016. We estimate wind power density from primary data, and solar power density from primary plant-level data and prior datasets on capacity density. The mean power density of 411 onshore wind power plants in 2016 was 0.50 We m−2. Wind plants with the largest areas have the lowest power densities. Wind power capacity factors are increasing, but that increase is associated with a decrease in capacity densities, so power densities are stable or declining. If wind power expands away from the best locations and the areas of wind power plants keep increasing, it seems likely that wind’s power density will decrease as total wind generation increases. The mean 2016 power density of 1150 solar power plants was 5.4 We m−2. Solar capacity factors and (likely) power densities are increasing with time driven, in part, by improved panel efficiencies. Wind power has a 10-fold lower power density than solar, but wind power installations directly occupy much less of the land within their boundaries. The environmental and social consequences of these divergent land occupancy patterns need further study.

Is the global temperature record credible?

Strengthen transparency in regulatory science

“Scientific studies should be reproducible—especially if they are used to justify government regulations. But NAS’s report, The Irreproducibility Crisis of Modern Science, released earlier this year, found that many supposedly scientific results cannot be reproduced in subsequent investigations.

We believe that individual scientists, the federal government, and state legislatures must take steps to promote reliable, reproducible science. And we believe that all Americans should be equipped with basic statistics and other tools to recognize faulty science when they see it.” click here

Paris climate deal makes “grand promises” that will not have a lasting benefit

” “Here’s a United Nations climate report that environmentalists probably don’t want anybody to read. It says that even if every country abides by the grand promises they made last year in Paris to reduce greenhouse gases, the planet would still be “doomed.” ” click here

New York City will soon be underwater, Not!

Nils-Axel. The Illusive Flooding of New York CityJournal of Environmental Sciences Volume 1, Issue 2 

In media we often hear frightening stories of a sea in the progress of rapidly rising and flooding low-lying coasts and islands, and coastal cities like New York. This paper is devoted to a scientific evaluation of evidence-based facts versus fake news that violates facts and physical laws. It is a serious mistake to claim that global sea level is in a phase of rapid rise. Observationally based facts document a present changes in absolute (eustatic) sea level ranging between ±0.0 and +1.0 mm/yr. This poses no threats what so ever. In New York City, sea level is rising at a rate of +2.84 mm/yr, which would imply an additional rise in sea level by 23.3 cm by 2100, a modest rise that can be handled without problems. There also occur statements that sea level may raise by 1 m or more by 2100. All such claims represent fake news that does not concur with observational fact and violates physical frames of realism.

Wind turbines are a serious threat to predatory birds

“Wind turbines are the world’s new ‘apex predators’, wiping out buzzards, hawks and other carnivorous birds at the top of the food chain, say scientists. A study of wind farms in India found that predatory bird numbers drop by three quarters in areas around the turbines. This is having a ‘ripple effect’ across the food chain, with small mammals and reptiles adjusting their behaviour as their natural predators disappear from the skies.” click here