Geometry effect of phase change material container on waste heat recovery enhancement
Waste heat recovery from industrial exhaust gases is a key method to reduce fuel consumption and improve system energy efficiency. Phase change materials (PCMs) are one of the major media in the waste heat storing and recovering processes. The PCM container geometry is a crucial design factor but at...
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2023
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/164667 |
| _version_ | 1811678422519250944 |
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| author | Qin, Zhen Ji, Chenzhen Low, Zheng Hua Tong, Wei Wu, Chenlong Duan, Fei |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Qin, Zhen Ji, Chenzhen Low, Zheng Hua Tong, Wei Wu, Chenlong Duan, Fei |
| author_sort | Qin, Zhen |
| collection | NTU |
| description | Waste heat recovery from industrial exhaust gases is a key method to reduce fuel consumption and improve system energy efficiency. Phase change materials (PCMs) are one of the major media in the waste heat storing and recovering processes. The PCM container geometry is a crucial design factor but attracts less attention for its effect on the PCM melting and heat storage operation. This study simulates the melting behaviour and heat storage performance in the PCM storage containers with the same cross area but different configurations with the rectangular shape and ones with concave folded sidewalls and protruding folded sidewalls. The geometry variation on PCM containers influences both the contact area with the hot airflow and natural convection in the melting phase of PCMs. The three-dimensional transient modelling indicates that the natural convection currents enhance the PCM melting and thermal storage rates. The PCM container design angle, α, shows a remarkable impact on the natural convection strength, PCM melting time, and energy storage rate. The protruding-shaped container with α at 133.8∘ presents the least melting time of 4,645 s, reducing 24.9% of the melting time in comparison to the rectangular chamber as the baseline with α= 90 ∘. The study can inspire the design of PCM storage geometries with efficient waste heat recovery in the industrial applications. |
| first_indexed | 2024-10-01T02:53:01Z |
| format | Journal Article |
| id | ntu-10356/164667 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:53:01Z |
| publishDate | 2023 |
| record_format | dspace |
| spelling | ntu-10356/1646672023-02-08T01:45:37Z Geometry effect of phase change material container on waste heat recovery enhancement Qin, Zhen Ji, Chenzhen Low, Zheng Hua Tong, Wei Wu, Chenlong Duan, Fei School of Mechanical and Aerospace Engineering Engineering::Mechanical engineering Phase Change Materials Storage Container Geometry Waste heat recovery from industrial exhaust gases is a key method to reduce fuel consumption and improve system energy efficiency. Phase change materials (PCMs) are one of the major media in the waste heat storing and recovering processes. The PCM container geometry is a crucial design factor but attracts less attention for its effect on the PCM melting and heat storage operation. This study simulates the melting behaviour and heat storage performance in the PCM storage containers with the same cross area but different configurations with the rectangular shape and ones with concave folded sidewalls and protruding folded sidewalls. The geometry variation on PCM containers influences both the contact area with the hot airflow and natural convection in the melting phase of PCMs. The three-dimensional transient modelling indicates that the natural convection currents enhance the PCM melting and thermal storage rates. The PCM container design angle, α, shows a remarkable impact on the natural convection strength, PCM melting time, and energy storage rate. The protruding-shaped container with α at 133.8∘ presents the least melting time of 4,645 s, reducing 24.9% of the melting time in comparison to the rectangular chamber as the baseline with α= 90 ∘. The study can inspire the design of PCM storage geometries with efficient waste heat recovery in the industrial applications. C. Ji thanks the support from Shanghai Committee of Science and Technology (grant No. 21ZR1466000, 21PJ1412700), China. 2023-02-08T01:45:37Z 2023-02-08T01:45:37Z 2022 Journal Article Qin, Z., Ji, C., Low, Z. H., Tong, W., Wu, C. & Duan, F. (2022). Geometry effect of phase change material container on waste heat recovery enhancement. Applied Energy, 327, 120108-. https://dx.doi.org/10.1016/j.apenergy.2022.120108 0306-2619 https://hdl.handle.net/10356/164667 10.1016/j.apenergy.2022.120108 2-s2.0-85140225508 327 120108 en Applied Energy © 2022 Elsevier Ltd. All rights reserved. |
| spellingShingle | Engineering::Mechanical engineering Phase Change Materials Storage Container Geometry Qin, Zhen Ji, Chenzhen Low, Zheng Hua Tong, Wei Wu, Chenlong Duan, Fei Geometry effect of phase change material container on waste heat recovery enhancement |
| title | Geometry effect of phase change material container on waste heat recovery enhancement |
| title_full | Geometry effect of phase change material container on waste heat recovery enhancement |
| title_fullStr | Geometry effect of phase change material container on waste heat recovery enhancement |
| title_full_unstemmed | Geometry effect of phase change material container on waste heat recovery enhancement |
| title_short | Geometry effect of phase change material container on waste heat recovery enhancement |
| title_sort | geometry effect of phase change material container on waste heat recovery enhancement |
| topic | Engineering::Mechanical engineering Phase Change Materials Storage Container Geometry |
| url | https://hdl.handle.net/10356/164667 |
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