Thermal stress influence on the long-term performance of fast-charging paraffin-based thermal storage
The present study evaluates the impact of charging speeds on the long-term performance of paraffin-based thermal energy storage (TES) up to 10,000 actual thermal cycles. Paraffin and form-stable phase change material (FSPCM) is used as the reference materials. The FSPCM is made of paraffin (80 wt%)...
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| Format: | Article |
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Elsevier
2023
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| _version_ | 1825939293143564288 |
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| author | Lahuri, Azizul Hakim |
| author_facet | Lahuri, Azizul Hakim |
| author_sort | Lahuri, Azizul Hakim |
| collection | UPM |
| description | The present study evaluates the impact of charging speeds on the long-term performance of paraffin-based thermal energy storage (TES) up to 10,000 actual thermal cycles. Paraffin and form-stable phase change material (FSPCM) is used as the reference materials. The FSPCM is made of paraffin (80 wt%) and high-density polyethylene (HDPE, 20 wt%). The thermal cycling treatment is applied to the samples using slow (1 °C/min), normal (5 °C/min) and fast-charging cycles (10 °C/min). Performance assessment is conducted using an active thermal storage model. According to the assessment, thermal stress and hysteresis effect occur severely after 10,000 fast-charging cycles. It disrupts the heat transfer process, reducing the power and charging rate. Scanning electron microscope (SEM) shows the void formation for paraffin which correspond to a lower efficiency (62.5 %) than FSPCM (66.6 %). The presence of HDPE reduces the impact of the fast-charging effect on paraffin. The SEM micrograph for FSPCM indicates that a chemi-crystallization leads to phase-separation between paraffin and HDPE. It helps to maintain the charging and discharging duration after 10,000 fast-charging cycles. Furthermore, the decrement of melting enthalpy of FSPCM (5.5 %) is much lower than paraffin (12.7 %). Hence, FPSCM maintains the storage capacity after 10,000 fast-charging cycles at a sufficient level. The multi-step transition and power curve during the charging/discharging cycle are discussed in detail within the article. Further improvement can be taken to minimize the performance degradation of fast-charging paraffin-based TES by compositing paraffin to withstand thermal stress or modifying the system operation after a certain fast-charging cycle. |
| first_indexed | 2024-03-06T11:23:38Z |
| format | Article |
| id | upm.eprints-105982 |
| institution | Universiti Putra Malaysia |
| last_indexed | 2024-03-06T11:23:38Z |
| publishDate | 2023 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | upm.eprints-1059822024-02-28T07:25:06Z http://psasir.upm.edu.my/id/eprint/105982/ Thermal stress influence on the long-term performance of fast-charging paraffin-based thermal storage Lahuri, Azizul Hakim The present study evaluates the impact of charging speeds on the long-term performance of paraffin-based thermal energy storage (TES) up to 10,000 actual thermal cycles. Paraffin and form-stable phase change material (FSPCM) is used as the reference materials. The FSPCM is made of paraffin (80 wt%) and high-density polyethylene (HDPE, 20 wt%). The thermal cycling treatment is applied to the samples using slow (1 °C/min), normal (5 °C/min) and fast-charging cycles (10 °C/min). Performance assessment is conducted using an active thermal storage model. According to the assessment, thermal stress and hysteresis effect occur severely after 10,000 fast-charging cycles. It disrupts the heat transfer process, reducing the power and charging rate. Scanning electron microscope (SEM) shows the void formation for paraffin which correspond to a lower efficiency (62.5 %) than FSPCM (66.6 %). The presence of HDPE reduces the impact of the fast-charging effect on paraffin. The SEM micrograph for FSPCM indicates that a chemi-crystallization leads to phase-separation between paraffin and HDPE. It helps to maintain the charging and discharging duration after 10,000 fast-charging cycles. Furthermore, the decrement of melting enthalpy of FSPCM (5.5 %) is much lower than paraffin (12.7 %). Hence, FPSCM maintains the storage capacity after 10,000 fast-charging cycles at a sufficient level. The multi-step transition and power curve during the charging/discharging cycle are discussed in detail within the article. Further improvement can be taken to minimize the performance degradation of fast-charging paraffin-based TES by compositing paraffin to withstand thermal stress or modifying the system operation after a certain fast-charging cycle. Elsevier 2023-01-01 Article PeerReviewed Lahuri, Azizul Hakim (2023) Thermal stress influence on the long-term performance of fast-charging paraffin-based thermal storage. Thermal Science and Engineering Progress, 37. p. 101546. https://www.sciencedirect.com/science/article/abs/pii/S2451904922003523 Thermal cycles paraffin based Academic achievement - Research - Malaysia 10.1016/j.tsep.2022.101546 |
| spellingShingle | Thermal cycles paraffin based Academic achievement - Research - Malaysia Lahuri, Azizul Hakim Thermal stress influence on the long-term performance of fast-charging paraffin-based thermal storage |
| title | Thermal stress influence on the long-term performance of fast-charging paraffin-based thermal storage |
| title_full | Thermal stress influence on the long-term performance of fast-charging paraffin-based thermal storage |
| title_fullStr | Thermal stress influence on the long-term performance of fast-charging paraffin-based thermal storage |
| title_full_unstemmed | Thermal stress influence on the long-term performance of fast-charging paraffin-based thermal storage |
| title_short | Thermal stress influence on the long-term performance of fast-charging paraffin-based thermal storage |
| title_sort | thermal stress influence on the long term performance of fast charging paraffin based thermal storage |
| topic | Thermal cycles paraffin based Academic achievement - Research - Malaysia |
| work_keys_str_mv | AT lahuriazizulhakim thermalstressinfluenceonthelongtermperformanceoffastchargingparaffinbasedthermalstorage |