Performance analysis and optimization of a steam ejector through streamlining of the primary nozzle
A steam ejector uses high-pressure vapor as the power for operating in steam cycles. The ejector geometry and pressure of the motive flow significantly influence its performance. Here, a steam ejector used in a distilled water preparation system for medical injection was numerically studied to impro...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-10-01
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| Series: | Case Studies in Thermal Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X21005190 |
| _version_ | 1818670339753771008 |
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| author | Wenxu Sun Xiaojing Ma Yuanmin Zhang Lei Jia Haoyuan Xue |
| author_facet | Wenxu Sun Xiaojing Ma Yuanmin Zhang Lei Jia Haoyuan Xue |
| author_sort | Wenxu Sun |
| collection | DOAJ |
| description | A steam ejector uses high-pressure vapor as the power for operating in steam cycles. The ejector geometry and pressure of the motive flow significantly influence its performance. Here, a steam ejector used in a distilled water preparation system for medical injection was numerically studied to improve its performance under insufficient motive source, in the meantime, to guarantee its high efficiency under the designed motive pressure of 6.0 bar. Owing to the temporary insufficiency of the motive pressure of around 4.5 bar in a specific time period, the most convenient and inexpensive approach was to fine-tune the primary nozzle and replace it with no further changes in the ejector structure. Fifteen streamline nozzle profiles were established and the performance effect of the different structures is discussed. The entrainment ratio of the ejector with a streamlined nozzle could reach up to 19.79% and 8.04% higher than the original one under the motive pressures of 4.5 and 5.5 bar, respectively. In addition, their performance was similar under a designed motive pressure of 6.0 bar. The proposed ejector extends the high efficiency operating range of the on-site steam ejector and the results may contribute to the streamline ejector design. |
| first_indexed | 2024-12-17T07:06:33Z |
| format | Article |
| id | doaj.art-2ce0bfc4ddc043a4a61bfa700fb050a7 |
| institution | Directory Open Access Journal |
| issn | 2214-157X |
| language | English |
| last_indexed | 2024-12-17T07:06:33Z |
| publishDate | 2021-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj.art-2ce0bfc4ddc043a4a61bfa700fb050a72022-12-21T21:59:09ZengElsevierCase Studies in Thermal Engineering2214-157X2021-10-0127101356Performance analysis and optimization of a steam ejector through streamlining of the primary nozzleWenxu Sun0Xiaojing Ma1Yuanmin Zhang2Lei Jia3Haoyuan Xue4Institute of Marine Science and Technology, Shandong University, Qingdao, 266237, ChinaInstitute of Marine Science and Technology, Shandong University, Qingdao, 266237, ChinaInstitute of Marine Science and Technology, Shandong University, Qingdao, 266237, ChinaSchool of Control Science and Engineering, Shandong University, Jinan, 250061, ChinaSchool of Control Science and Engineering, Shandong University, Jinan, 250061, China; Corresponding author.A steam ejector uses high-pressure vapor as the power for operating in steam cycles. The ejector geometry and pressure of the motive flow significantly influence its performance. Here, a steam ejector used in a distilled water preparation system for medical injection was numerically studied to improve its performance under insufficient motive source, in the meantime, to guarantee its high efficiency under the designed motive pressure of 6.0 bar. Owing to the temporary insufficiency of the motive pressure of around 4.5 bar in a specific time period, the most convenient and inexpensive approach was to fine-tune the primary nozzle and replace it with no further changes in the ejector structure. Fifteen streamline nozzle profiles were established and the performance effect of the different structures is discussed. The entrainment ratio of the ejector with a streamlined nozzle could reach up to 19.79% and 8.04% higher than the original one under the motive pressures of 4.5 and 5.5 bar, respectively. In addition, their performance was similar under a designed motive pressure of 6.0 bar. The proposed ejector extends the high efficiency operating range of the on-site steam ejector and the results may contribute to the streamline ejector design.http://www.sciencedirect.com/science/article/pii/S2214157X21005190EjectorStreamline nozzleDistilled waterComputational fluid dynamics |
| spellingShingle | Wenxu Sun Xiaojing Ma Yuanmin Zhang Lei Jia Haoyuan Xue Performance analysis and optimization of a steam ejector through streamlining of the primary nozzle Case Studies in Thermal Engineering Ejector Streamline nozzle Distilled water Computational fluid dynamics |
| title | Performance analysis and optimization of a steam ejector through streamlining of the primary nozzle |
| title_full | Performance analysis and optimization of a steam ejector through streamlining of the primary nozzle |
| title_fullStr | Performance analysis and optimization of a steam ejector through streamlining of the primary nozzle |
| title_full_unstemmed | Performance analysis and optimization of a steam ejector through streamlining of the primary nozzle |
| title_short | Performance analysis and optimization of a steam ejector through streamlining of the primary nozzle |
| title_sort | performance analysis and optimization of a steam ejector through streamlining of the primary nozzle |
| topic | Ejector Streamline nozzle Distilled water Computational fluid dynamics |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X21005190 |
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