Comparative study of thermally integrated pumped thermal energy storage based on the organic rankine cycle with different working fluid pairs
Thermal integrated pumped thermal energy storage (TIPTES) systems with the features of high efficiency, flexibility, and reliability, have attracted increasing attention since they can integrate low-grade heat sources to further improve the utilization and economic viability of renewable energy. In...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-12-01
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| Series: | Frontiers in Energy Research |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fenrg.2023.1338391/full |
| _version_ | 1827395963454488576 |
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| author | Xuhui Jiang Xi Zhang Ruiqiong Wang Xurong Wang |
| author_facet | Xuhui Jiang Xi Zhang Ruiqiong Wang Xurong Wang |
| author_sort | Xuhui Jiang |
| collection | DOAJ |
| description | Thermal integrated pumped thermal energy storage (TIPTES) systems with the features of high efficiency, flexibility, and reliability, have attracted increasing attention since they can integrate low-grade heat sources to further improve the utilization and economic viability of renewable energy. In this study, a typical TIPTES system driven by waste flue gas is established, and the heat pump and organic Rankine cycle (ORC) are chosen as the charging and discharging cycle, respectively. Four organic fluids, including R600, R245fa, R601a, and R1336mzz(Z), are selected to compose sixteen different working fluid pairs for thermodynamic analysis. The effects of key parameters, like heat pump system evaporation temperature and hot storage tank temperature, on system performance were analyzed, and the single-objective optimization was conducted. A comparative study was carried out to identify the best working fluid pair according to the optimization results. Results show that the system’s power-to-power efficiency goes up as the evaporation temperature increases while an increase in the heat storage temperature decreases the exergy efficiency of the TIPTES system. Optimization results show that the R245fa + R245fa is the best working fluid pair, and in this system, the ORC evaporator has the largest exergy destruction at about 260.84 kW, which is 20.2% of the total. On the other hand, the ORC pump has the smallest exergy destruction only about 0.5%. This study also finds that the system’s power-to-power efficiency of using different working fluids in either heat pump cycles or ORC cycles is lower than that of using the same working fluid throughout the entire system. |
| first_indexed | 2024-03-08T18:42:37Z |
| format | Article |
| id | doaj.art-19b9a2c6ade942e1afd978f4920a4573 |
| institution | Directory Open Access Journal |
| issn | 2296-598X |
| language | English |
| last_indexed | 2024-03-08T18:42:37Z |
| publishDate | 2023-12-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Energy Research |
| spelling | doaj.art-19b9a2c6ade942e1afd978f4920a45732023-12-29T04:15:24ZengFrontiers Media S.A.Frontiers in Energy Research2296-598X2023-12-011110.3389/fenrg.2023.13383911338391Comparative study of thermally integrated pumped thermal energy storage based on the organic rankine cycle with different working fluid pairsXuhui Jiang0Xi Zhang1Ruiqiong Wang2Xurong Wang3PowerChina Chongqing Engineering Co., Ltd., Chongqing, ChinaPowerChina Chongqing Engineering Co., Ltd., Chongqing, ChinaPowerChina Chongqing Engineering Co., Ltd., Chongqing, ChinaSchool of Energy and Building Environment Engineering, Henan University of Urban Construction, Pingdingshan, ChinaThermal integrated pumped thermal energy storage (TIPTES) systems with the features of high efficiency, flexibility, and reliability, have attracted increasing attention since they can integrate low-grade heat sources to further improve the utilization and economic viability of renewable energy. In this study, a typical TIPTES system driven by waste flue gas is established, and the heat pump and organic Rankine cycle (ORC) are chosen as the charging and discharging cycle, respectively. Four organic fluids, including R600, R245fa, R601a, and R1336mzz(Z), are selected to compose sixteen different working fluid pairs for thermodynamic analysis. The effects of key parameters, like heat pump system evaporation temperature and hot storage tank temperature, on system performance were analyzed, and the single-objective optimization was conducted. A comparative study was carried out to identify the best working fluid pair according to the optimization results. Results show that the system’s power-to-power efficiency goes up as the evaporation temperature increases while an increase in the heat storage temperature decreases the exergy efficiency of the TIPTES system. Optimization results show that the R245fa + R245fa is the best working fluid pair, and in this system, the ORC evaporator has the largest exergy destruction at about 260.84 kW, which is 20.2% of the total. On the other hand, the ORC pump has the smallest exergy destruction only about 0.5%. This study also finds that the system’s power-to-power efficiency of using different working fluids in either heat pump cycles or ORC cycles is lower than that of using the same working fluid throughout the entire system.https://www.frontiersin.org/articles/10.3389/fenrg.2023.1338391/fullorganic rankine cyclethermally integratedpumped thermal energy storagethermodynamic analysiscomparative study |
| spellingShingle | Xuhui Jiang Xi Zhang Ruiqiong Wang Xurong Wang Comparative study of thermally integrated pumped thermal energy storage based on the organic rankine cycle with different working fluid pairs Frontiers in Energy Research organic rankine cycle thermally integrated pumped thermal energy storage thermodynamic analysis comparative study |
| title | Comparative study of thermally integrated pumped thermal energy storage based on the organic rankine cycle with different working fluid pairs |
| title_full | Comparative study of thermally integrated pumped thermal energy storage based on the organic rankine cycle with different working fluid pairs |
| title_fullStr | Comparative study of thermally integrated pumped thermal energy storage based on the organic rankine cycle with different working fluid pairs |
| title_full_unstemmed | Comparative study of thermally integrated pumped thermal energy storage based on the organic rankine cycle with different working fluid pairs |
| title_short | Comparative study of thermally integrated pumped thermal energy storage based on the organic rankine cycle with different working fluid pairs |
| title_sort | comparative study of thermally integrated pumped thermal energy storage based on the organic rankine cycle with different working fluid pairs |
| topic | organic rankine cycle thermally integrated pumped thermal energy storage thermodynamic analysis comparative study |
| url | https://www.frontiersin.org/articles/10.3389/fenrg.2023.1338391/full |
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