Thermo-Economic Analysis of a Hybrid Ejector Refrigerating System Based on a Low Grade Heat Source
The rising of the global energy demand requires the use of alternative energy conversion systems employing renewable sources. In the refrigeration and air conditioning fields, heat driven ejector systems represent a promising way to produce the cooling effect by using available low-grade temperature...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-01-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/13/3/562 |
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| author | Gianluca Lillo Rita Mastrullo Alfonso William Mauro Raniero Trinchieri Luca Viscito |
| author_facet | Gianluca Lillo Rita Mastrullo Alfonso William Mauro Raniero Trinchieri Luca Viscito |
| author_sort | Gianluca Lillo |
| collection | DOAJ |
| description | The rising of the global energy demand requires the use of alternative energy conversion systems employing renewable sources. In the refrigeration and air conditioning fields, heat driven ejector systems represent a promising way to produce the cooling effect by using available low-grade temperature sources. In this paper, a thermo-economic analysis of a waste heat recovery hybrid ejector cycle (WHRHEC) was carried out. A thermodynamic model was firstly developed to simulate a WHRHEC able to obtain chilled water with a cooling load of 20 kW, by varying the working fluids and the pinch point values in the heat exchangers. Specific single- and two-phase heat transfer correlations were used to estimate the heat transfer surface and therefore the investment costs. The operative ranges that provide a reasonable compromise between the set-up costs and the cycle performances were then defined and compared to the current waste heat-driven technologies, such as absorption chillers and organic Rankine cycles (ORCs) coupled with vapor compression cycles (VCCs). The last part of the paper presents an economic analysis providing the map of the design (plant size) and contingent (specific cost of energy, waste heat availability) variables that lead to the economic convenience of a WHRHEC system when integrated to a conventional VCC plant. |
| first_indexed | 2024-04-14T00:38:16Z |
| format | Article |
| id | doaj.art-f7a74e862c864fe495559abe8e429468 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-14T00:38:16Z |
| publishDate | 2020-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-f7a74e862c864fe495559abe8e4294682022-12-22T02:22:16ZengMDPI AGEnergies1996-10732020-01-0113356210.3390/en13030562en13030562Thermo-Economic Analysis of a Hybrid Ejector Refrigerating System Based on a Low Grade Heat SourceGianluca Lillo0Rita Mastrullo1Alfonso William Mauro2Raniero Trinchieri3Luca Viscito4Department 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, ItalyEnte per le Nuove tecnologie, Energia ed Ambiente (ENEA), Italian National Agency for New Technologies, Energy and Sustainable Economic Development, C.R. Casaccia—Via Anguillarese 301, 00123 Rome, ItalyDepartment of Industrial Engineering, Federico II University of Naples—P. le Tecchio, 80-80125 Naples, ItalyThe rising of the global energy demand requires the use of alternative energy conversion systems employing renewable sources. In the refrigeration and air conditioning fields, heat driven ejector systems represent a promising way to produce the cooling effect by using available low-grade temperature sources. In this paper, a thermo-economic analysis of a waste heat recovery hybrid ejector cycle (WHRHEC) was carried out. A thermodynamic model was firstly developed to simulate a WHRHEC able to obtain chilled water with a cooling load of 20 kW, by varying the working fluids and the pinch point values in the heat exchangers. Specific single- and two-phase heat transfer correlations were used to estimate the heat transfer surface and therefore the investment costs. The operative ranges that provide a reasonable compromise between the set-up costs and the cycle performances were then defined and compared to the current waste heat-driven technologies, such as absorption chillers and organic Rankine cycles (ORCs) coupled with vapor compression cycles (VCCs). The last part of the paper presents an economic analysis providing the map of the design (plant size) and contingent (specific cost of energy, waste heat availability) variables that lead to the economic convenience of a WHRHEC system when integrated to a conventional VCC plant.https://www.mdpi.com/1996-1073/13/3/562thermo-economic analysisejectorwaste heat recovery |
| spellingShingle | Gianluca Lillo Rita Mastrullo Alfonso William Mauro Raniero Trinchieri Luca Viscito Thermo-Economic Analysis of a Hybrid Ejector Refrigerating System Based on a Low Grade Heat Source Energies thermo-economic analysis ejector waste heat recovery |
| title | Thermo-Economic Analysis of a Hybrid Ejector Refrigerating System Based on a Low Grade Heat Source |
| title_full | Thermo-Economic Analysis of a Hybrid Ejector Refrigerating System Based on a Low Grade Heat Source |
| title_fullStr | Thermo-Economic Analysis of a Hybrid Ejector Refrigerating System Based on a Low Grade Heat Source |
| title_full_unstemmed | Thermo-Economic Analysis of a Hybrid Ejector Refrigerating System Based on a Low Grade Heat Source |
| title_short | Thermo-Economic Analysis of a Hybrid Ejector Refrigerating System Based on a Low Grade Heat Source |
| title_sort | thermo economic analysis of a hybrid ejector refrigerating system based on a low grade heat source |
| topic | thermo-economic analysis ejector waste heat recovery |
| url | https://www.mdpi.com/1996-1073/13/3/562 |
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