My previous post on wind energy was long. Here’s the executive summary, followed by two corrections resulting from reader comments.
Based on current or foreseeable grid and energy storage technology, wind energy cannot supply base-load power. It therefore cannot play a major role in energy-independence or reduction of greenhouse gases. If utility-scale storage existed, wind energy might be economically viable. Even if storage and transmission capability existed, the low energy density of wind farms combined with rarity of high-quality wind resources in the US mean that wind cannot contribute significantly toward our energy goals. Without utility-scale storage, building more wind farms also requires building more conventional electricity sources, which do not meet our greenhouse gas reduction goals.
John Droz, called “anti-wind crusader” by the Sierra Club, challenged my claim that wind receives less money than other forms of electric power, noting that this hasn’t been true in recent years. Based on US Energy Information Administration data John is indeed right and I stand corrected on that point. John observes, in his presentation materials (slide 85), that the 2010 wind subsidies exceed those to all conventional sources combined. John doesn’t include all tax breaks in his calculations, but I have done so in the chart below. Even with tax breaks added, his point on subsidies is still nearly as strong. In absolute dollars, wind subsidies plus tax breaks greatly exceed those of coal, gas or nuclear, while wind’s contribution to net power is tiny. Also note that only a small fraction of wind subsidies is R&D; most goes to direct expenditures.
Architect and Design-Thinker Richard Heimann observed that my chart of levelized costs of different energy sources made wind look too good because wind without a base-load provision isn’t realistic. In other words, there is no such thing as wind energy by itself (a point also stressed by John Droz). The second chart below (click to enlarge) shows what wind would look like if base-load capacity were added using the lowest-priced gas option (ACC gas). This raises the cost of wind considerably, putting it on the same scale as solar photovoltaic.
None of this makes wind look any better of course.