Desperately seeking energy efficiency … using information and communication technologies?

This paper provides a reflection on the potential contribution of scientific computing with a view to improving energy system efficiency. First, we will consider energy efficiency globally in order to evaluate its potential. We will then focus on electricity, since electrical energy is interpreted as the universal vector of work. This will give us the understanding we need for envisaging a more efficient energy system. The use of ICTs (Information and Communication Technologies) as a final solution for improving system efficiency should be reconsidered. The drain on energy resources that they entail can, in fact, outweigh the expected gains. Better management of existing energy systems should therefore be privileged via scientific approaches designed to envisage the rational use of energy.