Study on Thermal Stress of Water/Steam Solar Absorber Tubes Under Unilateral Non-uniform Heat Flux Boundary Conditions
The absorber tubes are subjected to highly non-uniform solar irradiation inside a water/steam solar cavity receiver. This causes the uneven wall temperature and large gradients applied to the absorber tubes, producing thermal deformation and stress, even the damage and failure of the receiver. The t...
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Editorial Department of Power Generation Technology
2021-12-01
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| Series: | 发电技术 |
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| Online Access: | https://www.pgtjournal.com/EN/10.12096/j.2096-4528.pgt.21047 |
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| author | Canghong ZHANG Nan TU Jiabin FANG |
| author_facet | Canghong ZHANG Nan TU Jiabin FANG |
| author_sort | Canghong ZHANG |
| collection | DOAJ |
| description | The absorber tubes are subjected to highly non-uniform solar irradiation inside a water/steam solar cavity receiver. This causes the uneven wall temperature and large gradients applied to the absorber tubes, producing thermal deformation and stress, even the damage and failure of the receiver. The typical boiling tube and superheated tube were selected as the research objects. The thermal-structural coupling numerical simulation was carried out by using ANSYS finite element analysis method. The results show that these two types of tubes have significant differences in terms of heat transfer. The radial temperature gradient of the boiling tube leads to the bi-axial thermal stress appearing on the inner and outer walls of its irradiated front side. The circumferential temperature gradient of the superheated tube results in the serious bending deformation and the high axial stress, which also induces the circumferential distribution of equivalent stress. When the concealed back side of the absorber tubes is constrained by supports, the tube bending is significantly improved, and the thermal stress of the superheated tube is no longer circumferential. Furthermore, the axial normal stress component increases greatly and the equivalent stress on the absorber tubes increases by 1.3-6.9 times. |
| format | Article |
| id | doaj-art-593f1ffe4c9f48d08625f3cac683a94f |
| institution | DOAJ |
| issn | 2096-4528 |
| language | English |
| publishDate | 2021-12-01 |
| publisher | Editorial Department of Power Generation Technology |
| record_format | Article |
| series | 发电技术 |
| spelling | doaj-art-593f1ffe4c9f48d08625f3cac683a94f2025-08-20T02:49:50ZengEditorial Department of Power Generation Technology发电技术2096-45282021-12-0142669970610.12096/j.2096-4528.pgt.21047fdjs-42-6-699Study on Thermal Stress of Water/Steam Solar Absorber Tubes Under Unilateral Non-uniform Heat Flux Boundary ConditionsCanghong ZHANGNan TUJiabin FANGThe absorber tubes are subjected to highly non-uniform solar irradiation inside a water/steam solar cavity receiver. This causes the uneven wall temperature and large gradients applied to the absorber tubes, producing thermal deformation and stress, even the damage and failure of the receiver. The typical boiling tube and superheated tube were selected as the research objects. The thermal-structural coupling numerical simulation was carried out by using ANSYS finite element analysis method. The results show that these two types of tubes have significant differences in terms of heat transfer. The radial temperature gradient of the boiling tube leads to the bi-axial thermal stress appearing on the inner and outer walls of its irradiated front side. The circumferential temperature gradient of the superheated tube results in the serious bending deformation and the high axial stress, which also induces the circumferential distribution of equivalent stress. When the concealed back side of the absorber tubes is constrained by supports, the tube bending is significantly improved, and the thermal stress of the superheated tube is no longer circumferential. Furthermore, the axial normal stress component increases greatly and the equivalent stress on the absorber tubes increases by 1.3-6.9 times.https://www.pgtjournal.com/EN/10.12096/j.2096-4528.pgt.21047solar receiverboiling tubesuperheated tubetemperature gradientthermal stresssupport constraint |
| spellingShingle | Canghong ZHANG Nan TU Jiabin FANG Study on Thermal Stress of Water/Steam Solar Absorber Tubes Under Unilateral Non-uniform Heat Flux Boundary Conditions 发电技术 solar receiver boiling tube superheated tube temperature gradient thermal stress support constraint |
| title | Study on Thermal Stress of Water/Steam Solar Absorber Tubes Under Unilateral Non-uniform Heat Flux Boundary Conditions |
| title_full | Study on Thermal Stress of Water/Steam Solar Absorber Tubes Under Unilateral Non-uniform Heat Flux Boundary Conditions |
| title_fullStr | Study on Thermal Stress of Water/Steam Solar Absorber Tubes Under Unilateral Non-uniform Heat Flux Boundary Conditions |
| title_full_unstemmed | Study on Thermal Stress of Water/Steam Solar Absorber Tubes Under Unilateral Non-uniform Heat Flux Boundary Conditions |
| title_short | Study on Thermal Stress of Water/Steam Solar Absorber Tubes Under Unilateral Non-uniform Heat Flux Boundary Conditions |
| title_sort | study on thermal stress of water steam solar absorber tubes under unilateral non uniform heat flux boundary conditions |
| topic | solar receiver boiling tube superheated tube temperature gradient thermal stress support constraint |
| url | https://www.pgtjournal.com/EN/10.12096/j.2096-4528.pgt.21047 |
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