Tag Archives: PV

Wind Power and Noise

How Loud Is A Wind Turbine? Our friends at Treehugger re-published this graphic from GE, which builds wind turbines.

Graphic showing wind turbine noise

If a wind turbine spins in a forest do you hear it?

If you’re standing next to a utility scale wind turbine, then you’ll hear it. At 300 meters, which is as close to residences as we can build them, they are about as loud as a refrigerator. People report that a set of wind turbines – they tend to be built in sets – produce noise and subsonic vibrations, which can be irritating. But what should we do? PV solar modules are silent. However, they don’t produce power at night.  Coal produces tons of toxic waste, from arsenic to zinc, including cadmium, mercury, lead, uranium, thorium – actually producing more radioactive waste than nuclear power.  And coal produces carbon dioxide. Mining coal and uranium is dirty. We are converting mountains of natural beauty into mountains of toxic waste. (see Coal Tattoo, or I Love Mountains)

So how loud is a wind turbine? And if wind power is too loud, how should we turn on the lights?

Solar Power and Toxic Waste

Ground-mounted solar array in a field of wildflowers

Ground-mounted solar array in a field of wildflowers. Copyright iphotostock.com

If you think there are zero direct emissions from the production of electricity from PV solar modules, YOU’RE ABSOLUTELY CORRECT. There are however, indirect emissions associated with production, transport, installation and refresh / recycle are dependent on the technologies used in those processes. Most are associated with the use of fossil fuels and nuclear power to manufacture and move solar modules.

Three observations stand out David Biello’s article, “Dark Side of Solar Cells Brightens,” Scientific American, Feb. 2008.

  1. Indirect emissions are derived from the fossil fuels used to generate the electricity for PV manufacturing facilities.
  2. Heavy metals, such as cadmium, used to manufacture PV solar modules, can be recovered from mining wastes and coal ash.
  3. Overall toxic emissions are 90 to 300 times lower than those from coal power plants.

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