Waste Heat Driven Multi-Ejector Cooling Systems: Optimization of Design at Partial Load; Seasonal Performance and Cost Evaluation
In this paper, a seasonal performance analysis of a hybrid ejector cooling system is carried-out, by considering a multi-ejector pack as expansion device. A 20 kW ejector-based chiller was sized to obtain the optimal tradeoff between performance and investment costs. The seasonal performance of the...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-09-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/14/18/5663 |
| _version_ | 1829452702296309760 |
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| author | Luca Viscito Gianluca Lillo Giovanni Napoli Alfonso William Mauro |
| author_facet | Luca Viscito Gianluca Lillo Giovanni Napoli Alfonso William Mauro |
| author_sort | Luca Viscito |
| collection | DOAJ |
| description | In this paper, a seasonal performance analysis of a hybrid ejector cooling system is carried-out, by considering a multi-ejector pack as expansion device. A 20 kW ejector-based chiller was sized to obtain the optimal tradeoff between performance and investment costs. The seasonal performance of the proposed solution was then evaluated through a dynamic simulation able to obtain the performance of the designed chiller with variable ambient temperatures for three different reference climates. The optimized multi-ejector system required three or four ejectors for any reference climate and was able to enhance the system performance at partial load, with a significant increase (up to 107%) of the seasonal energy efficiency ratio. The proposed system was then compared to conventional cooling technologies supplied by electric energy (electrical chillers EHP) or low-grade heat sources (absorption chillers AHP) by considering the total costs for a lifetime of 20 years and electric energy-specific costs for domestic applications from 0.10 to 0.50 €/kWhel. The optimized multi-ejector cooling system presented a significant convenience with respect to both conventional technologies. For warmer climates and with high electricity costs, the minimum lifetime for the multi-ejector system to achieve the economic break-even point could be as low as 1.9 years. |
| first_indexed | 2024-03-10T07:43:48Z |
| format | Article |
| id | doaj.art-b3524c17e0d447738cb0222bf2b9f51f |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T07:43:48Z |
| publishDate | 2021-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-b3524c17e0d447738cb0222bf2b9f51f2023-11-22T12:51:03ZengMDPI AGEnergies1996-10732021-09-011418566310.3390/en14185663Waste Heat Driven Multi-Ejector Cooling Systems: Optimization of Design at Partial Load; Seasonal Performance and Cost EvaluationLuca Viscito0Gianluca Lillo1Giovanni Napoli2Alfonso William Mauro3Department of Industrial Engineering, Federico II University of Naples P. le Tecchio 80, 80125 Naples, ItalyDepartment of Industrial Engineering, Federico II University of Naples P. le Tecchio 80, 80125 Naples, ItalyDepartment of Industrial Engineering, Federico II University of Naples P. le Tecchio 80, 80125 Naples, ItalyDepartment of Industrial Engineering, Federico II University of Naples P. le Tecchio 80, 80125 Naples, ItalyIn this paper, a seasonal performance analysis of a hybrid ejector cooling system is carried-out, by considering a multi-ejector pack as expansion device. A 20 kW ejector-based chiller was sized to obtain the optimal tradeoff between performance and investment costs. The seasonal performance of the proposed solution was then evaluated through a dynamic simulation able to obtain the performance of the designed chiller with variable ambient temperatures for three different reference climates. The optimized multi-ejector system required three or four ejectors for any reference climate and was able to enhance the system performance at partial load, with a significant increase (up to 107%) of the seasonal energy efficiency ratio. The proposed system was then compared to conventional cooling technologies supplied by electric energy (electrical chillers EHP) or low-grade heat sources (absorption chillers AHP) by considering the total costs for a lifetime of 20 years and electric energy-specific costs for domestic applications from 0.10 to 0.50 €/kWhel. The optimized multi-ejector cooling system presented a significant convenience with respect to both conventional technologies. For warmer climates and with high electricity costs, the minimum lifetime for the multi-ejector system to achieve the economic break-even point could be as low as 1.9 years.https://www.mdpi.com/1996-1073/14/18/5663thermo-economic analysisseasonal performancedynamic simulationmulti-ejectorheat driven cooling systems |
| spellingShingle | Luca Viscito Gianluca Lillo Giovanni Napoli Alfonso William Mauro Waste Heat Driven Multi-Ejector Cooling Systems: Optimization of Design at Partial Load; Seasonal Performance and Cost Evaluation Energies thermo-economic analysis seasonal performance dynamic simulation multi-ejector heat driven cooling systems |
| title | Waste Heat Driven Multi-Ejector Cooling Systems: Optimization of Design at Partial Load; Seasonal Performance and Cost Evaluation |
| title_full | Waste Heat Driven Multi-Ejector Cooling Systems: Optimization of Design at Partial Load; Seasonal Performance and Cost Evaluation |
| title_fullStr | Waste Heat Driven Multi-Ejector Cooling Systems: Optimization of Design at Partial Load; Seasonal Performance and Cost Evaluation |
| title_full_unstemmed | Waste Heat Driven Multi-Ejector Cooling Systems: Optimization of Design at Partial Load; Seasonal Performance and Cost Evaluation |
| title_short | Waste Heat Driven Multi-Ejector Cooling Systems: Optimization of Design at Partial Load; Seasonal Performance and Cost Evaluation |
| title_sort | waste heat driven multi ejector cooling systems optimization of design at partial load seasonal performance and cost evaluation |
| topic | thermo-economic analysis seasonal performance dynamic simulation multi-ejector heat driven cooling systems |
| url | https://www.mdpi.com/1996-1073/14/18/5663 |
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