Tag Archives: hydroelectric

Southern Company Shareholder meeting: renewables more than doubled in one year 2017-05-24

While its natural gas percentage remained flat, and coal and nuclear decreased, Southern Company (SO) more than doubled its renewable energy generation percentage in one year. Maybe I’ll mention that at the annual shareholder meeting in May.

2017 Mix:
2017 Energy Mix
2016 Mix:
2016 Energy Mix

When: 10:00 a.m., ET
Wednesday, May 24, 2017

Where: The Lodge Conference Center
Callaway Gardens
4500 Southern Pine Drive
Pine Mountain, GA 31822-2593

Event: Annual Southern Company
Shareholder Meeting

Southern Company has all its SEC filings online, including Continue reading →

Privatize TVA? Southern Company would like that

The hydropower assets of the Tennessee Valley Authority would give Southern Company a way to avoid doing distributed solar for a while. Will SO CEO Tom Fanning and Georgia Power CEO Paul Bowers bit the bullet and go straight for distributed solar instead of helping Duke privatize TVA for a short-term stopgap that would set both of them farther behind the disruptive solar curve?

SolarCity and Southern Company stock
Blue line: SCTY; red line: SO, chart by Google Finance.
May 16th: Goldman Sachs invested $500 million in SCTY.
May 22nd: SO stockholder meeting.
May 24th: S&P downgrades SO.

Wes Patoka wrote for Motley Fool 24 May 2013, Who Benefits the Most if the TVA Is Privatized,

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A billion people on solar: India

Figure 6: Solar Sheep (Concentrix Solar PV concentrator plant) Two professors in India have done the math and found that there’s plenty of available land in India (much of it on rooftops) to power its billion people on solar energy alone. And solar uses less water than nuclear or coal, also as we already knew for the U.S.

Today in The Hindu, India can meet energy needs sans N-power: Study,

According to their study, 4.1 per cent of the total uncultivable and Figure 3: 1GWh Land area per energy source waste land area in India is enough to meet the projected annual demand of 3,400 terawatt-hour (TWh) by 2070 by solar energy alone (1 terawatt-hour per year equals 114 megawatts). The land area required will be further reduced to 3.1 per cent “if we bring the other potential renewable energy sources of India into picture”, they claim. They conclude that land availability is not a limiting constraint for the solar source as believed. According to their study, 4.1 per cent of the total uncultivable and waste land area in India is enough to meet the projected annual demand of 3,400 terawatt-hour (TWh) by 2070 by solar energy alone (1 terawatt-hour per year equals 114 megawatts). The land area required will be further reduced to 3.1 per cent “if we bring the other potential renewable energy sources of India into picture”, they claim. They conclude that land availability is not a limiting constraint for the solar source as believed.

The graph above shows land occupation needed to generate 1 gigawatt hour (1GWh) for each of coal, nuclear, hydroelectric, and solar. It is Figure 3 from the actual study, Is land really a constraint for the utilitzation of solar energy in India? by H. Mitavachan and J. Srinivasan, Current Science, Vol. 103, No. 2, pp. 163-168, 25 July 2012. More from the Hindu article, with graphs from the journal article:

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Nuclear and coal burning water: solar doesn’t

Solar power is the smart thing to do for jobs, energy independence, and profit. It’s also what we need to do to save water.

Julia Pyper and ClimateWire wrote for Scientific American 29 June 2012, Electricity Generation ‘Burning’ Rivers of Drought-Scorched Southeast: A new report reckons the water cost of electricity generation

Power plants are guzzling water across the United States and increasing the risk of blackouts in the Southeast, where the precious resource is drying up.

“Burning Our Rivers,” a new report by the River Network, found that it takes about 40,000 gallons of water to meet the average American household’s energy needs, which is five times more than the amount of water used directly in that home….

Table 3. Total Water Footprint of a Kilowatt-hour
(Gallons per kWh)
2009 U.S. Electric Grid
(National weighted average)
Hydroelectric 29.920
Coal 7.143
Natural Gas 1.512
Nuclear 2.995
Geothermal 0.002
Solar 0.002
Wind 0.001
Total 41.575

In the Southeast, which has been battling a drought for more than a year, the impact of power plants is especially worrisome and could lead to brownouts and blackouts throughout the summer and beyond.

“The conflicts between energy and water needs are ones we’ve seen before … and will only worsen as the frequency of drought increases and water temperatures rise driven in part by climate change,” said Ulla Reeves, regional program director at the Southern Alliance for Clean Energy.

The report’s number 1 recommendation:

1. As a nation, we should focus on renewable energy sources and low water technologies.

Why?

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Nuclear (Stewart Brand) vs. renewable energy (Mark Z. Jacobson) at TED

Stewart Brand of Whole Earth Catalog fame is a long-time environmentalist who in recent years decided nuclear was necessary. (He also decided no-till was necessary, which was enough to convince me he’s gone barmy.) Here at TED he debates Mark Z. Jacobson, whose new study says we can power the world with wind, water, and sun. I think Jacobson should reconsider including building more hydroelectric dams, but his study does demonstrate that we don’t need nuclear or biomass. But watch it and see what you think:

Here is my critique of Brand’s arguments: Continue reading →