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

doi:10.3390/su132111592

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 journal › Article › peer-review

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 language	English
Article number	11592
Journal	Sustainability
Volume	13
Issue number	21
DOIs	https://doi.org/10.3390/su132111592
Publication status	Published - 20 Oct 2021

Bibliographical note

© 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).

Keywords

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

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sustainability-13-11592.pdf
© 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/
Final published version, 1.9 MBLicence: CC BY 3.0

Cite this

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title = "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.",

keywords = "COP, Exergy efficiency, Organic Rankine cycle, Thermal efficiency, Vapor compression cycle, Waste heat recovery",

author = "Muhammad Asim and Faiza Kashif and Jamal Umer and Alvi, {Jahan Zeb} and Muhammad Imran and Sheheryar Khan and Zia, {Abdul Wasy} and Leung, {Michael K. H.}",

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AU - Imran, Muhammad

AU - Khan, Sheheryar

AU - Zia, Abdul Wasy

AU - Leung, Michael K. H.

N1 - © 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).

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N2 - 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.

AB - 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.

KW - COP

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KW - Thermal efficiency

KW - Vapor compression cycle

KW - Waste heat recovery

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JF - Sustainability

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M1 - 11592

ER -

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

Abstract

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Keywords

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