Parametric Analysis of a Polygeneration System with CO<sub>2</sub> Working Fluid
The objective of the present work is the investigation of a novel polygeneration system for power, refrigeration and heating production at two temperature levels. The present system uses CO<sub>2</sub> as the working fluid, which is an environmentally friendly fluid. The total configurat...
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MDPI AG
2021-04-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/7/3215 |
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| author | Evangelos Bellos Christos Tzivanidis |
| author_facet | Evangelos Bellos Christos Tzivanidis |
| author_sort | Evangelos Bellos |
| collection | DOAJ |
| description | The objective of the present work is the investigation of a novel polygeneration system for power, refrigeration and heating production at two temperature levels. The present system uses CO<sub>2</sub> as the working fluid, which is an environmentally friendly fluid. The total configuration is a combination of a transcritical refrigeration cycle coupled to a Brayton cycle with recompression, which is fed by a biomass boiler. The examined system, at nominal operating conditions, produces refrigeration at 5 °C, and heating at 45 °C and 80 °C. Additionally, the system can be converted into a trigeneration system where the two heating outputs are produced at the same temperature level. The system was studied parametrically by changing the following seven critical parameters: turbine inlet temperature, high pressure, medium pressure, heat exchanger effectiveness, refrigeration temperature, heat rejection temperature and high heating temperature. In nominal operating conditions, the system energy and exergy efficiencies were 78.07% and 26.29%, respectively. For a heat input of 100 kW, the net power production was 24.50 kW, the refrigeration production was 30.73 kW, while the low and high heating production was 9.24 kW and 13.60 kW, respectively. The analysis was conducted with a developed model in Engineering Equation Solver. |
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| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T12:37:30Z |
| publishDate | 2021-04-01 |
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| spelling | doaj.art-342467945fa44ed0a6acb807e343bfd22023-11-21T14:08:18ZengMDPI AGApplied Sciences2076-34172021-04-01117321510.3390/app11073215Parametric Analysis of a Polygeneration System with CO<sub>2</sub> Working FluidEvangelos Bellos0Christos Tzivanidis1Thermal Department, School of Mechanical Engineering, National Technical University of Athens, Zografou, Heroon Polytechniou 9, 15780 Athens, GreeceThermal Department, School of Mechanical Engineering, National Technical University of Athens, Zografou, Heroon Polytechniou 9, 15780 Athens, GreeceThe objective of the present work is the investigation of a novel polygeneration system for power, refrigeration and heating production at two temperature levels. The present system uses CO<sub>2</sub> as the working fluid, which is an environmentally friendly fluid. The total configuration is a combination of a transcritical refrigeration cycle coupled to a Brayton cycle with recompression, which is fed by a biomass boiler. The examined system, at nominal operating conditions, produces refrigeration at 5 °C, and heating at 45 °C and 80 °C. Additionally, the system can be converted into a trigeneration system where the two heating outputs are produced at the same temperature level. The system was studied parametrically by changing the following seven critical parameters: turbine inlet temperature, high pressure, medium pressure, heat exchanger effectiveness, refrigeration temperature, heat rejection temperature and high heating temperature. In nominal operating conditions, the system energy and exergy efficiencies were 78.07% and 26.29%, respectively. For a heat input of 100 kW, the net power production was 24.50 kW, the refrigeration production was 30.73 kW, while the low and high heating production was 9.24 kW and 13.60 kW, respectively. The analysis was conducted with a developed model in Engineering Equation Solver.https://www.mdpi.com/2076-3417/11/7/3215polygenerationCO<sub>2</sub> working fluidR744parametric studymultigeneration |
| spellingShingle | Evangelos Bellos Christos Tzivanidis Parametric Analysis of a Polygeneration System with CO<sub>2</sub> Working Fluid Applied Sciences polygeneration CO<sub>2</sub> working fluid R744 parametric study multigeneration |
| title | Parametric Analysis of a Polygeneration System with CO<sub>2</sub> Working Fluid |
| title_full | Parametric Analysis of a Polygeneration System with CO<sub>2</sub> Working Fluid |
| title_fullStr | Parametric Analysis of a Polygeneration System with CO<sub>2</sub> Working Fluid |
| title_full_unstemmed | Parametric Analysis of a Polygeneration System with CO<sub>2</sub> Working Fluid |
| title_short | Parametric Analysis of a Polygeneration System with CO<sub>2</sub> Working Fluid |
| title_sort | parametric analysis of a polygeneration system with co sub 2 sub working fluid |
| topic | polygeneration CO<sub>2</sub> working fluid R744 parametric study multigeneration |
| url | https://www.mdpi.com/2076-3417/11/7/3215 |
| work_keys_str_mv | AT evangelosbellos parametricanalysisofapolygenerationsystemwithcosub2subworkingfluid AT christostzivanidis parametricanalysisofapolygenerationsystemwithcosub2subworkingfluid |