For all individuals that work in the energy sector, kWh (or, for those twisted anglo-saxons, BTUs) are as familiar as litres of water to the gardener, or kg of flour to the baker. Actually, when thinking about it, no one knows what a kWh really is, not even me ! One cannot "touch" energy ; it is just some abstract figure on a piece of paper, sometimes the prerequisite to an invoice, and to grasp fully the meaning of these figures, it will always be necessary - one cannot escape one's senses - to associate to a given figure a real action or a real thing th ... Читати далі »