Massachusetts-based energy technology company Beacon Power Corporation filed for Chapter 11 restructuring in the U.S. Bankruptcy Court for the District of Delaware October 30. The company received a $43 million Department of Energy loan guarantee in August 2010 to build a 20 MW flywheel energy storage facility in Stephentown, NY, and told the court last week that it has a viable business model with revenue generating assets that should enable the company to achieve profitability in the future. The technology is viewed as a quicker, clean energy alternative to reliability services currently provided by constantly increasing and lowering the output of conventional fossil fuel power plants.