Advancing Industrial Process Electrification and Heat Pump Integration with New Exergy Pinch Analysis Targeting Techniques

Timothy Gordon Walmsley*, Benjamin James Lincoln, Roger Padullés, Donald John Cleland

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

The process integration and electrification concept has significant potential to support the industrial transition to low- and net-zero-carbon process heating. This increasingly essential concept requires an expanded set of process analysis tools to fully comprehend the interplay of heat recovery and process electrification (e.g., heat pumping). In this paper, new Exergy Pinch Analysis tools and methods are proposed that can set lower bound work targets by acutely balancing process heat recovery and heat pumping. As part of the analysis, net energy and exergy load curves enable visualization of energy and exergy surpluses and deficits. As extensions to the grand composite curve in conventional Pinch Analysis, these curves enable examination of different pocket-cutting strategies, revealing their distinct impacts on heat, exergy, and work targets. Demonstrated via case studies on a spray dryer and an evaporator, the exergy analysis targets net shaft-work correctly. In the evaporator case study, the analysis points to the heat recovery pockets playing an essential role in reducing the work target by 25.7%. The findings offer substantial potential for improved industrial energy management, providing a robust framework for engineers to enhance industrial process and energy sustainability.
Original languageEnglish
Article number2838
JournalEnergies
Volume17
Issue number12
Number of pages18
ISSN1996-1073
DOIs
Publication statusPublished - 2024

Keywords

  • Process integration
  • Pinch analysis
  • Process electrification
  • Heat pumps
  • Exergy analysis
  • Energy efficiency

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