Investigation of a Novel CO<sub>2</sub> Transcritical Organic Rankine Cycle Driven by Parabolic Trough Solar Collectors
The objective of the present study is the detailed investigation and optimization of a transcritical organic Rankine cycle operating with CO<sub>2</sub>. The novelty of the present system is that the CO<sub>2</sub> is warmed up inside a solar parabolic trough collector and th...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-08-01
|
| Series: | Applied System Innovation |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2571-5577/4/3/53 |
| _version_ | 1797520265598468096 |
|---|---|
| author | Evangelos Bellos Christos Tzivanidis |
| author_facet | Evangelos Bellos Christos Tzivanidis |
| author_sort | Evangelos Bellos |
| collection | DOAJ |
| description | The objective of the present study is the detailed investigation and optimization of a transcritical organic Rankine cycle operating with CO<sub>2</sub>. The novelty of the present system is that the CO<sub>2</sub> is warmed up inside a solar parabolic trough collector and there is not a secondary circuit between the solar collector and the CO<sub>2</sub>. Therefore, the examined configuration presents increased performance due to the higher operating temperatures of the working fluid in the turbine inlet. The system is studied parametrically and it is optimized by investigating different pressure and temperature level in the turbine inlet. The simulation is performed with a validated mathematical model that has been developed in Engineering Equation Solver software. According to the results, the optimum turbine inlet temperature is ranged from 713 up to 847 K, while the higher pressure in the turbine inlet enhances electricity production. In the default scenario (turbine inlet at 800 K and turbine pressure at 200 bar), the system efficiency is found 24.27% with solar irradiation at 800 W/m<sup>2</sup>. A dynamic investigation of the system for Athens (Greece) climate proved that the yearly efficiency of the unit is 19.80%, the simple payback period of the investment is 7.88 years, and the yearly CO<sub>2</sub> emissions avoidance is 48.7 tones. |
| first_indexed | 2024-03-10T07:54:20Z |
| format | Article |
| id | doaj.art-8f8d19d746c44791997171421a123efe |
| institution | Directory Open Access Journal |
| issn | 2571-5577 |
| language | English |
| last_indexed | 2024-03-10T07:54:20Z |
| publishDate | 2021-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied System Innovation |
| spelling | doaj.art-8f8d19d746c44791997171421a123efe2023-11-22T11:58:46ZengMDPI AGApplied System Innovation2571-55772021-08-01435310.3390/asi4030053Investigation of a Novel CO<sub>2</sub> Transcritical Organic Rankine Cycle Driven by Parabolic Trough Solar CollectorsEvangelos 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 study is the detailed investigation and optimization of a transcritical organic Rankine cycle operating with CO<sub>2</sub>. The novelty of the present system is that the CO<sub>2</sub> is warmed up inside a solar parabolic trough collector and there is not a secondary circuit between the solar collector and the CO<sub>2</sub>. Therefore, the examined configuration presents increased performance due to the higher operating temperatures of the working fluid in the turbine inlet. The system is studied parametrically and it is optimized by investigating different pressure and temperature level in the turbine inlet. The simulation is performed with a validated mathematical model that has been developed in Engineering Equation Solver software. According to the results, the optimum turbine inlet temperature is ranged from 713 up to 847 K, while the higher pressure in the turbine inlet enhances electricity production. In the default scenario (turbine inlet at 800 K and turbine pressure at 200 bar), the system efficiency is found 24.27% with solar irradiation at 800 W/m<sup>2</sup>. A dynamic investigation of the system for Athens (Greece) climate proved that the yearly efficiency of the unit is 19.80%, the simple payback period of the investment is 7.88 years, and the yearly CO<sub>2</sub> emissions avoidance is 48.7 tones.https://www.mdpi.com/2571-5577/4/3/53solar concentrating powercarbon dioxidetranscritical ORCparabolic trough collectorsolar electricity |
| spellingShingle | Evangelos Bellos Christos Tzivanidis Investigation of a Novel CO<sub>2</sub> Transcritical Organic Rankine Cycle Driven by Parabolic Trough Solar Collectors Applied System Innovation solar concentrating power carbon dioxide transcritical ORC parabolic trough collector solar electricity |
| title | Investigation of a Novel CO<sub>2</sub> Transcritical Organic Rankine Cycle Driven by Parabolic Trough Solar Collectors |
| title_full | Investigation of a Novel CO<sub>2</sub> Transcritical Organic Rankine Cycle Driven by Parabolic Trough Solar Collectors |
| title_fullStr | Investigation of a Novel CO<sub>2</sub> Transcritical Organic Rankine Cycle Driven by Parabolic Trough Solar Collectors |
| title_full_unstemmed | Investigation of a Novel CO<sub>2</sub> Transcritical Organic Rankine Cycle Driven by Parabolic Trough Solar Collectors |
| title_short | Investigation of a Novel CO<sub>2</sub> Transcritical Organic Rankine Cycle Driven by Parabolic Trough Solar Collectors |
| title_sort | investigation of a novel co sub 2 sub transcritical organic rankine cycle driven by parabolic trough solar collectors |
| topic | solar concentrating power carbon dioxide transcritical ORC parabolic trough collector solar electricity |
| url | https://www.mdpi.com/2571-5577/4/3/53 |
| work_keys_str_mv | AT evangelosbellos investigationofanovelcosub2subtranscriticalorganicrankinecycledrivenbyparabolictroughsolarcollectors AT christostzivanidis investigationofanovelcosub2subtranscriticalorganicrankinecycledrivenbyparabolictroughsolarcollectors |