The Energy Department today expanded its digital outreach efforts by launching a blog, a Facebook page and a Twitter account. The department already has a You Tube channel and a Flickr page, and Energy Secretary Steven Chu has more than 13,400 fans on his own Facebook page. Expanding its social networking efforts is part of a larger attempt to increase transparency, make the department more accessible to average Americans and better engage with citizens, Chu wrote in the inaugural blog post. Our goal is to use the Energy Blog and our other social media outlets to show you who we are, what…