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  4. Exergy flow diagrams as novel approach to discuss the efficiency of compressed air systems
 
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2012
Conference Paper
Titel

Exergy flow diagrams as novel approach to discuss the efficiency of compressed air systems

Abstract
Compressed air systems are among the major consumers of electrical energy in industry. As the importance of energy-efficiency grows in general, so does the need for valid and reliable metrics for discussing efficiency. Today, energy flow diagrams are a common tool to illustrate energy efficiency in compressed air systems. They are however subject to various shortcomings which are mainly related to their lack of transparency and reproducibility. Therefore, a novel approach for the assessment of efficiency is presented which is based on the exergy concept. This approach allows for a transparent calculation of flow diagrams for compressed air systems, including the possibility to illustrate the effects of a heat recovery system. The concept is illustrated at the example of an industrial set-up starting at the compressor inlet and ending at the application. The resulting diagram allows a more transparent and objective view on efficiency evaluations and thus contributes to a better understanding of energy-efficiency in compressed air systems and related applications.
Author(s)
Krichel, Susanne
Sawodny, Oliver
Hülsmann, Steffen
Hirzel, Simon orcid-logo
Elsland, Rainer
Hauptwerk
8th International Fluid Power Conference, IFK 2012. Vol.3
Konferenz
International Fluid Power Conference 2012
Internationales Fluidtechnisches Kolloquium (IFK) 2012
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Language
English
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Fraunhofer-Institut für System- und Innovationsforschung ISI
Tags
  • energy efficiency

  • compressed air system...

  • flow diagram

  • exergy concept

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