Knoxville News Sentine: Oak Ridge National Laboratory already hosts the world’s fastest computer (Jaguar), as well as the world’s fastest computer for academic uses (Kraken). Soon, the laboratory also will house the world’s most powerful machine devoted exclusively to climate research. The new computer doesn’t have a name yet, but Cray Inc. announced this week that it had won a $47 million contract to provide the next-generation machine to ORNL. The Cray award is part of a multiyear, $215 million …