Energy efficiency potentials: contrasting thermodynamic, technical and economic limits for organic Rankine cycles within UK industry

Q. Chen, G. P. Hammond, J. B. Norman

Research output: Contribution to journalSpecial issue

13 Citations (Scopus)
140 Downloads (Pure)

Abstract

The laws of thermodynamics set a theoretical limit on the energy savings that can be realised in a given application. This thermodynamic potential cannot be reached in practice, and a technical potential for energy savings is defined by the performance of available technology. Only applications of the technology that are considered economic will usually be considered for installation. This economic potential will itself not be fully realised, with the actual savings that are achieved limited by further barriers. A database on surplus heat availability within UK industry was used to estimate the thermodynamic, technical, and economic potentials when converting this surplus heat to electricity using organic Rankine cycles (ORCs). Technical and economic information was based on that reported from existing installations and manufacturers. Installations economic over the target payback period totalled approximately 3.5 PJ/yr of electricity generation, primarily in the steel, chemicals and cement subsectors. However this result is sensitive to the input parameters, particularly the future price of electricity and required payback period, which are uncertain. Therefore a range of possible scenarios were investigated. The results form a basis for discussion on how to close this “gap” between the identified potentials and the savings realised in practice.
Original languageEnglish
Pages (from-to)984-990
JournalApplied Energy
Volume164
Early online date9 Sep 2015
DOIs
Publication statusPublished - 15 Feb 2016

Keywords

  • Surplus heat
  • Energy efficiency gap
  • Organic Rankine cycle
  • Industry
  • Barriers
  • Manufacturing

Fingerprint Dive into the research topics of 'Energy efficiency potentials: contrasting thermodynamic, technical and economic limits for organic Rankine cycles within UK industry'. Together they form a unique fingerprint.

  • Cite this