Compressing wind power underground
One of the biggest challenges facing renewable energy is making it "dispatchable," or available on demand. This is where storage comes in. General Compression, which raised $17 million last month, has designed a system that compresses air using wind turbines and pumps it underground. When power is needed, the compressed underground air is released into a gas turbine to make electricity.
March 4, 2010 11:15 AM PST
Photo by: General Compression
| Caption by: Martin LaMonica
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