On ABC (Australia) news tonight (14th May 2010) they spoke about Sydney buildings using tri-energy on gas. Further to this I found an article from 'The Australian' newspaper.
http://www.theaustralian.com.au/business/opinion/city-of-sydney-embraces-tri-generation-power/story-e6frg9if-1225864242695
I am wondering the difference between fuel cells and tri-energy. Why the choice for tri-energy and not fuel cells for Sydney's buildings?