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

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 c...

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Veröffentlicht in:Sustainability 2021-11, Vol.13 (21), p.11592
Hauptverfasser: Asim, Muhammad, Kashif, Faiza, Umer, Jamal, Alvi, Jahan Zeb, Imran, Muhammad, Khan, Sheheryar, Zia, Abdul Wasy, Leung, Michael K. H
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container_end_page
container_issue 21
container_start_page 11592
container_title Sustainability
container_volume 13
creator Asim, Muhammad
Kashif, Faiza
Umer, Jamal
Alvi, Jahan Zeb
Imran, Muhammad
Khan, Sheheryar
Zia, Abdul Wasy
Leung, Michael K. H
description 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.
doi_str_mv 10.3390/su132111592
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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. 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source MDPI - Multidisciplinary Digital Publishing Institute; EZB-FREE-00999 freely available EZB journals
subjects Air conditioning
Analysis
Compression
Compression tests
Cooling
Density
Efficiency
Electricity
Evaluation
Exergy
Fluids
Greenhouse gases
Heat
Heat recovery
Heat recovery systems
Liquids
Low temperature
Performance assessment
Rankine cycle
Refrigeration
Sensitivity analysis
Sustainability
Thermal energy
Thermodynamic efficiency
Thermodynamics
Vapor compression refrigeration
Vapors
Waste heat
Working fluids
title Performance Assessment and Working Fluid Selection for Novel Integrated Vapor Compression Cycle and Organic Rankine Cycle for Ultra Low Grade Waste Heat Recovery
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