Performance assessment and working fluid selection for novel integrated vapor compression cycle and organic rankine cycle for ultra low grade waste heat recovery

Muhammad Asim*, Faiza Kashif, Jamal Umer, Jahan Zeb Alvi, Muhammad Imran, Sheheryar Khan, Abdul Wasy Zia, Michael K. H. Leung

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)
24 Downloads (Pure)

Abstract

This paper presents the performance assessment and working fluid selection for a novel integrated vapor compression cycle‐organic Rankine cycle system (i‐VCC‐ORC), which recovers ultra‐low‐temperature waste heat rejected (50 °C) by the condenser of a vapor compression cycle (VCC). The analyses are carried out for a vapor compression cycle of a refrigeration capacity (heat input) of 35kW along with the component sizing of the organic Rankine cycle (ORC). The effects of the operational parameters on integrated system performance were investigated. The integrated system performance is estimated in terms of net COP, cycle thermal efficiency and exergy efficiency by completely utilizing and recovering the heat rejected by the condenser of the VCC system. R600a‐ R141b with COPnet (3.54) and ORC thermal efficiency (3.05%) is found to be the most suitable VCC‐ ORC working fluid pair. The integration of the vapor compression refrigeration cycle with the organic Rankine cycle increases the COP of the system by 12.5% as compared to the standalone COP of the vapor compression system. Moreover, the sensitivity analysis results show that there exists an optimum operating condition that maximizes the thermal performance of the integrated system.

Original languageEnglish
Article number11592
JournalSustainability
Volume13
Issue number21
Early online date20 Oct 2021
DOIs
Publication statusPublished - 1 Nov 2021

Keywords

  • COP
  • Exergy efficiency
  • Organic Rankine cycle
  • Thermal efficiency
  • Vapor compression cycle
  • Waste heat recovery

ASJC Scopus subject areas

  • Computer Science (miscellaneous)
  • Geography, Planning and Development
  • Renewable Energy, Sustainability and the Environment
  • Building and Construction
  • Environmental Science (miscellaneous)
  • Energy Engineering and Power Technology
  • Hardware and Architecture
  • Computer Networks and Communications
  • Management, Monitoring, Policy and Law

Fingerprint

Dive into the research topics of 'Performance assessment and working fluid selection for novel integrated vapor compression cycle and organic rankine cycle for ultra low grade waste heat recovery'. Together they form a unique fingerprint.

Cite this