CIRP Encyclopedia of Production Engineering

2014 Edition
| Editors: The International Academy for Production Engineering, Luc Laperrière, Gunther Reinhart

Energy Efficiency

  • Joost Duflou
  • Christoph Herrmann
  • Sami Kara
Reference work entry
DOI: https://doi.org/10.1007/978-3-642-20617-7_6604

Definition

Energy efficiency is the ratio between the useful energy output and the energy input of a thermodynamic system.

Theory and Application

Introduction

The energy efficiency metric originates from the early development of thermodynamic cycles, such as the steam engine and internal combustion engine. However, the metric can be applied to any thermodynamic system. It serves as a performance criterion of the corresponding system. Figure 1 illustrates a generic energy flow diagram of a thermodynamic system, with the system boundary shown by the dashed line.
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References

  1. Cullen JM (2009) Engineering fundamentals of energy efficiency. Doctoral dissertation, University of Cambridge, UKGoogle Scholar
  2. Gutowski TG, Sekulic DP (2011) Thermodynamic analysis of resources used in manufacturing processes. In: Bakshi BV, Gutowski TG, Sekulic DP (eds) Thermodynamics and the destruction of resources. Cambridge University Press, New York, pp 163–189CrossRefGoogle Scholar
  3. Patterson MG (1996) What is energy efficiency? Concepts, indicators and methodological issues. Energy Pol 24(5):377–390CrossRefGoogle Scholar
  4. Tanaka K (2008) Assessing measures of energy efficiency performance and their application in industry. IEA information paper. International Energy Agency, FranceGoogle Scholar

Copyright information

© CIRP 2014

Authors and Affiliations

  1. 1.Centre for Industrial Management, Department of Mechanical EngineeringKU LeuvenHeverlee - LeuvenBelgium
  2. 2.TU BraunschweigBraunschweigGermany
  3. 3.School of Mechanical & Manufacturing EngineeringThe University of New South WalesSydneyAustralia