PITTSBURGH, Pennsylvania, May 31 (TNSrpt) -- The U.S. Department of Energy's National Energy Technology Laboratory issued the following news: To address the data needs of energy system designers and to serve as a baseline for research and development, NETL has carried out a study to characterize the flexibility attributes - both performance and cost - of nine common commercial natural gas-fueled electricity generating units. The intermittent output of low-carbon, renewable power generation sou  more