Energy Efficiency

INTRODUCTION

The energy efficiency of a system - whether of an industrial size or of a civil or residential nature – consists in the ability to exploit the energy supplied to it to satisfy its needs. The lower is the consumption relative to the satisfaction of a given need, the better is the energy efficiency of a structure. Therefore, defining the energy efficiency of a system can be complex, due to the variety of devices that make-up the same system and their configurations.

However, by studying end uses and the transformation sector related to electricity production, it is possible to identify the most energy-intensive sectors. The Italian national budget shows that final consumption is divided into almost equal shares between the (i) industrial, (ii) civil and (iii) transport sectors: