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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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. |
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H</creator><creatorcontrib>Asim, Muhammad ; Kashif, Faiza ; Umer, Jamal ; Alvi, Jahan Zeb ; Imran, Muhammad ; Khan, Sheheryar ; Zia, Abdul Wasy ; Leung, Michael K. H</creatorcontrib><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.</description><identifier>ISSN: 2071-1050</identifier><identifier>EISSN: 2071-1050</identifier><identifier>DOI: 10.3390/su132111592</identifier><language>eng</language><publisher>Basel: MDPI AG</publisher><subject>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</subject><ispartof>Sustainability, 2021-11, Vol.13 (21), p.11592</ispartof><rights>COPYRIGHT 2021 MDPI AG</rights><rights>2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). 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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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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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