Discharging Behavior of a Fixed-Bed Thermochemical Reactor under Different Charging Conditions: Modelling and Experimental Validation
Thermochemical heat storage has attracted significant attention in recent years due to potential advantages associated with very high-energy density at the material scale and its suitability for long-duration energy storage because of almost zero loss during storage. Despite the potential, thermoche...
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| Format: | Article |
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MDPI AG
2022-11-01
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| Online Access: | https://www.mdpi.com/1996-1073/15/22/8377 |
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| author | Chengcheng Wang Hongkun Ma Abdalqader Ahmad Hui Yang Mingxi Ji Boyang Zou Binjian Nie Jie Chen Lige Tong Li Wang Yulong Ding |
| author_facet | Chengcheng Wang Hongkun Ma Abdalqader Ahmad Hui Yang Mingxi Ji Boyang Zou Binjian Nie Jie Chen Lige Tong Li Wang Yulong Ding |
| author_sort | Chengcheng Wang |
| collection | DOAJ |
| description | Thermochemical heat storage has attracted significant attention in recent years due to potential advantages associated with very high-energy density at the material scale and its suitability for long-duration energy storage because of almost zero loss during storage. Despite the potential, thermochemical heat storage technologies are still in the early stage of development and little has been reported on thermochemical reactors. In this paper, our recent work on the charging and discharging behavior of a fixed-bed thermochemical reactor is reported. Silica gels were used as the sorbent for the experimental work. An effective model was established to numerically study the effect of different charging conditions on the discharging behavior of the reactor, which was found to have a maximum deviation of 10.08% in terms of the root mean square error compared with the experimental results. The experimentally validated modelling also showed that the discharging temperature lift increased by 5.84 times by changing the flow direction of the air in the discharging process when the charging level was at 20%. At a charging termination temperature of 51.25 °C, the maximum discharging temperature was increased by 2.35 °C by reducing the charging flow velocity from 0.64 m/s to 0.21 m/s. An increase in the charging temperature and a decrease in the air humidity increased the maximum discharging outlet temperature lift by 3.37 and 1.89 times, respectively. |
| first_indexed | 2024-03-09T18:22:15Z |
| format | Article |
| id | doaj.art-2f0fc0f2394448a5a52f36fc850aa8bf |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-09T18:22:15Z |
| publishDate | 2022-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-2f0fc0f2394448a5a52f36fc850aa8bf2023-11-24T08:12:08ZengMDPI AGEnergies1996-10732022-11-011522837710.3390/en15228377Discharging Behavior of a Fixed-Bed Thermochemical Reactor under Different Charging Conditions: Modelling and Experimental ValidationChengcheng Wang0Hongkun Ma1Abdalqader Ahmad2Hui Yang3Mingxi Ji4Boyang Zou5Binjian Nie6Jie Chen7Lige Tong8Li Wang9Yulong Ding10School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaBirmingham Centre for Energy Storage & School of Chemical Engineering, University of Birmingham, Birmingham B15 2TT, UKBirmingham Centre for Energy Storage & School of Chemical Engineering, University of Birmingham, Birmingham B15 2TT, UKSchool of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaBirmingham Centre for Energy Storage & School of Chemical Engineering, University of Birmingham, Birmingham B15 2TT, UKBirmingham Centre for Energy Storage & School of Chemical Engineering, University of Birmingham, Birmingham B15 2TT, UKBirmingham Centre for Energy Storage & School of Chemical Engineering, University of Birmingham, Birmingham B15 2TT, UKBirmingham Centre for Energy Storage & School of Chemical Engineering, University of Birmingham, Birmingham B15 2TT, UKBirmingham Centre for Energy Storage & School of Chemical Engineering, University of Birmingham, Birmingham B15 2TT, UKSchool of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaSchool of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaThermochemical heat storage has attracted significant attention in recent years due to potential advantages associated with very high-energy density at the material scale and its suitability for long-duration energy storage because of almost zero loss during storage. Despite the potential, thermochemical heat storage technologies are still in the early stage of development and little has been reported on thermochemical reactors. In this paper, our recent work on the charging and discharging behavior of a fixed-bed thermochemical reactor is reported. Silica gels were used as the sorbent for the experimental work. An effective model was established to numerically study the effect of different charging conditions on the discharging behavior of the reactor, which was found to have a maximum deviation of 10.08% in terms of the root mean square error compared with the experimental results. The experimentally validated modelling also showed that the discharging temperature lift increased by 5.84 times by changing the flow direction of the air in the discharging process when the charging level was at 20%. At a charging termination temperature of 51.25 °C, the maximum discharging temperature was increased by 2.35 °C by reducing the charging flow velocity from 0.64 m/s to 0.21 m/s. An increase in the charging temperature and a decrease in the air humidity increased the maximum discharging outlet temperature lift by 3.37 and 1.89 times, respectively.https://www.mdpi.com/1996-1073/15/22/8377thermochemical energy storagereactornumerical simulationexperimental validationdischarging performance |
| spellingShingle | Chengcheng Wang Hongkun Ma Abdalqader Ahmad Hui Yang Mingxi Ji Boyang Zou Binjian Nie Jie Chen Lige Tong Li Wang Yulong Ding Discharging Behavior of a Fixed-Bed Thermochemical Reactor under Different Charging Conditions: Modelling and Experimental Validation Energies thermochemical energy storage reactor numerical simulation experimental validation discharging performance |
| title | Discharging Behavior of a Fixed-Bed Thermochemical Reactor under Different Charging Conditions: Modelling and Experimental Validation |
| title_full | Discharging Behavior of a Fixed-Bed Thermochemical Reactor under Different Charging Conditions: Modelling and Experimental Validation |
| title_fullStr | Discharging Behavior of a Fixed-Bed Thermochemical Reactor under Different Charging Conditions: Modelling and Experimental Validation |
| title_full_unstemmed | Discharging Behavior of a Fixed-Bed Thermochemical Reactor under Different Charging Conditions: Modelling and Experimental Validation |
| title_short | Discharging Behavior of a Fixed-Bed Thermochemical Reactor under Different Charging Conditions: Modelling and Experimental Validation |
| title_sort | discharging behavior of a fixed bed thermochemical reactor under different charging conditions modelling and experimental validation |
| topic | thermochemical energy storage reactor numerical simulation experimental validation discharging performance |
| url | https://www.mdpi.com/1996-1073/15/22/8377 |
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