Performance Assessment and Working Fluid Selection for Novel Integrated Vapor Compression Cycle and Organic Rankine Cycle for Ultra Low Grade Waste Heat Recovery

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.

Publication DOI: https://doi.org/10.3390/su132111592
Divisions: College of Engineering & Physical Sciences > School of Engineering and Technology > Mechanical, Biomedical & Design
College of Engineering & Physical Sciences
Additional Information: © 2021 by the authors. Li‐ censee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and con‐ ditions of the Creative Commons At‐ tribution (CC BY) license (http://crea‐ tivecommons.org/licenses/by/4.0/ Funding: The work described in this paper was partially supported by the Research Grants Council of the Hong Kong Special Administrative Region, China (Project No.: UGC/IDS(R)24/20), (Project Ref No. SEHS‐2020‐204(I)) and from Jiangsu Provincial Government Research Funding (Project No.: 2021K101B).
Uncontrolled Keywords: COP,Exergy efficiency,Organic Rankine cycle,Thermal efficiency,Vapor compression cycle,Waste heat recovery,Geography, Planning and Development,Renewable Energy, Sustainability and the Environment,Environmental Science (miscellaneous),Energy Engineering and Power Technology,Management, Monitoring, Policy and Law
Publication ISSN: 2071-1050
Last Modified: 29 May 2024 07:20
Date Deposited: 22 Oct 2021 12:40
Full Text Link:
Related URLs: https://www.mdp ... 050/13/21/11592 (Publisher URL)
http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2021-10-20
Accepted Date: 2021-10-18
Authors: Asim, Muhammad
Kashif, Faiza
Umer, Jamal
Alvi, Jahan Zeb
Imran, Muhammad (ORCID Profile 0000-0002-3057-1301)
Khan, Sheheryar
Zia, Abdul Wasy
Leung, Michael K. H.

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