This paper introduces the subject of industrial cooling and discusses the most important energy savings that are possible in this area.
Cooling is very expensive, so it is important that it is used only where necessary, and that only the most efficient technology is used. For thermodynamic reasons, the energy efficiency of a cooling system increases with decreasing temperature differential. It is therefore crucial to keep this differential as low as possible.
Three main types of cooling systems prevail in industrial environments: dry cooling, evaporative cooling, and compression cooling. This paper explains their main working principles and characteristics. Other types, such as absorption cooling, gas expansion, and thermo-electric cooling, are not treated in this application guide because of their limited presence in industry.
Each system has its own application domain. The choice of the right cooling system is one of the important initial decisions that must be taken in order to achieve maximum energy efficiency. Furthermore, this paper discusses several specific energy saving actions for each of the three cooling systems.
Significant energy savings can be made by installing variable frequency drives on fans (dry cooling, evaporative cooling), pumps (evaporative cooling, compression cooling), and compressors (compression cooling).