Investigation on heat transfer mechanism simulation and structure optimization design of hydraulic turbine bearing semi-ring cooler
Bearing is an important support to carry radial force and axial force, when hydro generator set is running, a large amount of heat produced by the rotor shaft and bearing touching will yield oil mist and jeopardize equipment health. The cooler can take away the heat in time, therefore, improving the...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-02-01
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| Series: | Heliyon |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S240584402500708X |
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| author | Yongfei Wang Yinhui Cai Jian Zhang Zhenyu Chen Chenhao Li Weipeng Sun |
| author_facet | Yongfei Wang Yinhui Cai Jian Zhang Zhenyu Chen Chenhao Li Weipeng Sun |
| author_sort | Yongfei Wang |
| collection | DOAJ |
| description | Bearing is an important support to carry radial force and axial force, when hydro generator set is running, a large amount of heat produced by the rotor shaft and bearing touching will yield oil mist and jeopardize equipment health. The cooler can take away the heat in time, therefore, improving the cooler's efficiency is of great significance. In this paper, the internal structure of a turbine water guide-bearing semi-ring cooler at a hydro plant is optimized and numerical calculation is carried out to study heat transfer performance under three operating conditions. The results show that, the proposed spiral twisted flat tube cooler effectively reduces the risk of heat exchange tube blockage and significantly improves cooler heat exchange efficiency. Compared to prototype cooler, heat transfer power for the optimized cooler with spiral twisted flat tube increases by 43.8%, 62.2%, and 73.8%, respectively. Optimizing spacer plate positions at the cooler's inlet and outlet further enhances heat transfer power by 47.2%, 52.4%, and 56.4%, respectively. The pressure, velocity, and other parameters of cooler are also improved after both types of optimization compared to the prototype. The findings provide a reference for improving the thermal performance of guide bearings. |
| format | Article |
| id | doaj-art-b7dd695b38264491b8ab9cae7c7ff649 |
| institution | Kabale University |
| issn | 2405-8440 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Heliyon |
| spelling | doaj-art-b7dd695b38264491b8ab9cae7c7ff6492025-02-07T04:47:56ZengElsevierHeliyon2405-84402025-02-01113e42328Investigation on heat transfer mechanism simulation and structure optimization design of hydraulic turbine bearing semi-ring coolerYongfei Wang0Yinhui Cai1Jian Zhang2Zhenyu Chen3Chenhao Li4Weipeng Sun5CHN Energy Dadu River Repair & Installation Co., Ltd., Leshan 614900, ChinaCHN Energy Dadu River Repair & Installation Co., Ltd., Leshan 614900, ChinaCHN Energy Dadu River Repair & Installation Co., Ltd., Leshan 614900, ChinaState Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi'an University of Technology, Xi'an 710048, ChinaState Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi'an University of Technology, Xi'an 710048, China; Corresponding author.State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi'an University of Technology, Xi'an 710048, ChinaBearing is an important support to carry radial force and axial force, when hydro generator set is running, a large amount of heat produced by the rotor shaft and bearing touching will yield oil mist and jeopardize equipment health. The cooler can take away the heat in time, therefore, improving the cooler's efficiency is of great significance. In this paper, the internal structure of a turbine water guide-bearing semi-ring cooler at a hydro plant is optimized and numerical calculation is carried out to study heat transfer performance under three operating conditions. The results show that, the proposed spiral twisted flat tube cooler effectively reduces the risk of heat exchange tube blockage and significantly improves cooler heat exchange efficiency. Compared to prototype cooler, heat transfer power for the optimized cooler with spiral twisted flat tube increases by 43.8%, 62.2%, and 73.8%, respectively. Optimizing spacer plate positions at the cooler's inlet and outlet further enhances heat transfer power by 47.2%, 52.4%, and 56.4%, respectively. The pressure, velocity, and other parameters of cooler are also improved after both types of optimization compared to the prototype. The findings provide a reference for improving the thermal performance of guide bearings.http://www.sciencedirect.com/science/article/pii/S240584402500708XBearing coolerHeat transferStructure optimizationSpiral twisted flat tubeNumerical simulation |
| spellingShingle | Yongfei Wang Yinhui Cai Jian Zhang Zhenyu Chen Chenhao Li Weipeng Sun Investigation on heat transfer mechanism simulation and structure optimization design of hydraulic turbine bearing semi-ring cooler Heliyon Bearing cooler Heat transfer Structure optimization Spiral twisted flat tube Numerical simulation |
| title | Investigation on heat transfer mechanism simulation and structure optimization design of hydraulic turbine bearing semi-ring cooler |
| title_full | Investigation on heat transfer mechanism simulation and structure optimization design of hydraulic turbine bearing semi-ring cooler |
| title_fullStr | Investigation on heat transfer mechanism simulation and structure optimization design of hydraulic turbine bearing semi-ring cooler |
| title_full_unstemmed | Investigation on heat transfer mechanism simulation and structure optimization design of hydraulic turbine bearing semi-ring cooler |
| title_short | Investigation on heat transfer mechanism simulation and structure optimization design of hydraulic turbine bearing semi-ring cooler |
| title_sort | investigation on heat transfer mechanism simulation and structure optimization design of hydraulic turbine bearing semi ring cooler |
| topic | Bearing cooler Heat transfer Structure optimization Spiral twisted flat tube Numerical simulation |
| url | http://www.sciencedirect.com/science/article/pii/S240584402500708X |
| work_keys_str_mv | AT yongfeiwang investigationonheattransfermechanismsimulationandstructureoptimizationdesignofhydraulicturbinebearingsemiringcooler AT yinhuicai investigationonheattransfermechanismsimulationandstructureoptimizationdesignofhydraulicturbinebearingsemiringcooler AT jianzhang investigationonheattransfermechanismsimulationandstructureoptimizationdesignofhydraulicturbinebearingsemiringcooler AT zhenyuchen investigationonheattransfermechanismsimulationandstructureoptimizationdesignofhydraulicturbinebearingsemiringcooler AT chenhaoli investigationonheattransfermechanismsimulationandstructureoptimizationdesignofhydraulicturbinebearingsemiringcooler AT weipengsun investigationonheattransfermechanismsimulationandstructureoptimizationdesignofhydraulicturbinebearingsemiringcooler |