Civil Engineering Reference
In-Depth Information
17
Energy Management Strategies
for Control and Planning
17.1
Introduction
Energy management strategies traditionally include six main sections: analysis of
historical data; check of energy supply contracts; energy audit and accounting;
evaluation of Key Performance Indicators (KPIs); engineering analysis, investment
proposals and plant control based on feasibility studies; personnel training and
information. Several factors must be considered:
Incidence of energy costs on turnover and added value;
Percentages of thermal and electric energy both as used in process and as
primary energy;
Identification and quantification of thermal and electric energy flows from
transformation plants to users;
Selection of significant Key Performance Indicators valid for the whole site, for
facility plants and for every production line;
Possibilities of heat recovery and centralized control of process and facility
plants;
Comparative incidence of energy used for process and services on total
consumption.
Energy strategies can be implemented at different levels depending on
the importance of energy in comparison with other production factors.
Of course, also the absolute cost of energy consumed in the site is a
parameter to be considered before starting any energy saving program.
Energy strategies should be tuned up with waste strategies because of their close
interdependence.
