Compressed Air and Thermal Energy Measurement in an Industrial Environment Compressed air is an indispensable medium in many industrial areas; however it is also an extremely inefficient form of energy: only about 5% of the electrical energy needed to produce it can be used and the rest is usually lost as waste heat. A manufacturer of aircraft turbines has turned these circumstances to their own advantage. The basic load of compressed air demand is covered by a speed- controlled and water-cooled compressor. Its waste heat is no longer released into the environment via an evaporator but rather used to heat a new 7500 m2 logistics building. Energy efficiency is both a cornerstone of environmental management and an imperative for commercial and entrepreneurial activity. Reliable data form the

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