IDEAS home Printed from https://ideas.repec.org/a/eee/renene/v161y2020icp766-776.html
   My bibliography  Save this article

Numerical studies on the performance of ammonia ejectors used in ocean thermal energy conversion system

Author

Listed:
  • Zhang, Jingzhi
  • Zhai, Xiaoyu
  • Li, Shizhen

Abstract

Ocean thermal energy conversion (OTEC) has attracted lots of attention for its potential in clean energy production. In order to further improve system efficiencies, a new type of OTEC system using two ammonia ejectors is proposed. Effects of working pressures and geometrical parameters on vapor-vapor ammonia ejectors are studied numerically. The results show that performance characteristics of ammonia ejectors are mostly in subcritical mode for the working conditions of OTEC, which is different from other refrigeration applications. Entrainment ratios of ammonia ejectors range from 0.44 to 1.68 based on the working conditions in the present work. Increases of area ratio and decreases of nozzle exit position are beneficial to the improvement of ejector entrainment ratios, while the performances of ejectors decrease with increasing primary flow pressure and with decreasing secondary flow pressure. The thermal efficiency of the new OTEC system decreases with increasing primary and secondary flow pressures, but increases with increasing entrainment ratios. Due to the enhancement of turbine output work and reduction of pumping power brought by the two ejectors, the highest thermal efficiency for the proposed OTEC system with ejectors is 3.95% which is about 10.33% higher than a normal OTEC system without ejectors.

Suggested Citation

  • Zhang, Jingzhi & Zhai, Xiaoyu & Li, Shizhen, 2020. "Numerical studies on the performance of ammonia ejectors used in ocean thermal energy conversion system," Renewable Energy, Elsevier, vol. 161(C), pages 766-776.
    • Handle: RePEc:eee:renene:v:161:y:2020:i:c:p:766-776
    DOI: 10.1016/j.renene.2020.07.025
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0960148120311010
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/j.renene.2020.07.025?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    References listed on IDEAS

    as
    1. Sahar Taslimi Taleghani & Mikhail Sorin & Sébastien Poncet, 2019. "Analysis and Optimization of Exergy Flows inside a Transcritical CO 2 Ejector for Refrigeration, Air Conditioning and Heat Pump Cycles," Energies, MDPI, vol. 12(9), pages 1-15, May.
    2. Han, Yu & Wang, Xiaodong & Sun, Hao & Zhang, Guangli & Guo, Lixin & Tu, Jiyuan, 2019. "CFD simulation on the boundary layer separation in the steam ejector and its influence on the pumping performance," Energy, Elsevier, vol. 167(C), pages 469-483.
    3. Jung, Jung-Yeul & Lee, Ho Saeng & Kim, Hyeon-Ju & Yoo, Yungpil & Choi, Woo-Young & Kwak, Ho-Young, 2016. "Thermoeconomic analysis of an ocean thermal energy conversion plant," Renewable Energy, Elsevier, vol. 86(C), pages 1086-1094.
    4. Metin, Cagri & Gök, Okan & Atmaca, Ayşe Uğurcan & Erek, Aytunç, 2019. "Numerical investigation of the flow structures inside mixing section of the ejector," Energy, Elsevier, vol. 166(C), pages 1216-1228.
    5. Bernardoni, C. & Binotti, M. & Giostri, A., 2019. "Techno-economic analysis of closed OTEC cycles for power generation," Renewable Energy, Elsevier, vol. 132(C), pages 1018-1033.
    6. Li, Xinguo & Zhang, Qilin & Li, Xiajie, 2013. "A Kalina cycle with ejector," Energy, Elsevier, vol. 54(C), pages 212-219.
    7. Thongtip, Tongchana & Aphornratana, Satha, 2018. "Development and performance of a heat driven R141b ejector air conditioner: Application in hot climate country," Energy, Elsevier, vol. 160(C), pages 556-572.
    8. Rau, Greg H. & Baird, Jim R., 2018. "Negative-CO2-emissions ocean thermal energy conversion," Renewable and Sustainable Energy Reviews, Elsevier, vol. 95(C), pages 265-272.
    9. Yilmaz, Tuncay & Erdinç, Mehmet Tahir, 2019. "Energetic and exergetic investigation of a novel refrigeration system utilizing ejector integrated subcooling using different refrigerants," Energy, Elsevier, vol. 168(C), pages 712-727.
    10. Quoilin, Sylvain & Broek, Martijn Van Den & Declaye, Sébastien & Dewallef, Pierre & Lemort, Vincent, 2013. "Techno-economic survey of Organic Rankine Cycle (ORC) systems," Renewable and Sustainable Energy Reviews, Elsevier, vol. 22(C), pages 168-186.
    11. Sun, Faming & Zhou, Weisheng & Ikegami, Yasuyuki & Nakagami, Kenichi & Su, Xuanming, 2014. "Energy–exergy analysis and optimization of the solar-boosted Kalina cycle system 11 (KCS-11)," Renewable Energy, Elsevier, vol. 66(C), pages 268-279.
    12. Wu, Yifei & Zhao, Hongxia & Zhang, Cunquan & Wang, Lei & Han, Jitian, 2018. "Optimization analysis of structure parameters of steam ejector based on CFD and orthogonal test," Energy, Elsevier, vol. 151(C), pages 79-93.
    13. Yoon, Jung-In & Seol, Sung-Hoon & Son, Chang-Hyo & Jung, Suk-Ho & Kim, Young-Bok & Lee, Ho-Saeng & Kim, Hyeon-Ju & Moon, Jung-Hyun, 2017. "Analysis of the high-efficiency EP-OTEC cycle using R152a," Renewable Energy, Elsevier, vol. 105(C), pages 366-373.
    14. Yamada, Noboru & Hoshi, Akira & Ikegami, Yasuyuki, 2009. "Performance simulation of solar-boosted ocean thermal energy conversion plant," Renewable Energy, Elsevier, vol. 34(7), pages 1752-1758.
    Full references (including those not matched with items on IDEAS)

    Citations

    Citations are extracted by the CitEc Project, subscribe to its RSS feed for this item.
    as


    Cited by:

    1. Geng, Donghan & Gao, Xiangjie, 2023. "Thermodynamic and exergoeconomic optimization of a novel cooling, desalination and power multigeneration system based on ocean thermal energy," Renewable Energy, Elsevier, vol. 202(C), pages 17-39.
    2. Mao, Liangjie & Wei, Changjiang & Zeng, Song & Cai, Mingjie, 2023. "Heat transfer mechanism of cold-water pipe in ocean thermal energy conversion system," Energy, Elsevier, vol. 269(C).

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Besagni, Giorgio, 2019. "Ejectors on the cutting edge: The past, the present and the perspective," Energy, Elsevier, vol. 170(C), pages 998-1003.
    2. Chen, Ruihua & Deng, Shuai & Zhao, Li & Zhao, Ruikai & Xu, Weicong, 2022. "Energy recovery from wastewater in deep-sea mining: Feasibility study on an energy supply solution with cold wastewater," Applied Energy, Elsevier, vol. 305(C).
    3. Vera, D. & Baccioli, A. & Jurado, F. & Desideri, U., 2020. "Modeling and optimization of an ocean thermal energy conversion system for remote islands electrification," Renewable Energy, Elsevier, vol. 162(C), pages 1399-1414.
    4. Khosravi, A. & Syri, Sanna & Assad, M.E.H. & Malekan, M., 2019. "Thermodynamic and economic analysis of a hybrid ocean thermal energy conversion/photovoltaic system with hydrogen-based energy storage system," Energy, Elsevier, vol. 172(C), pages 304-319.
    5. Wu, Zhixiang & Feng, Huijun & Chen, Lingen & Xie, Zhuojun & Cai, Cunguang, 2019. "Pumping power minimization of an evaporator in ocean thermal energy conversion system based on constructal theory," Energy, Elsevier, vol. 181(C), pages 974-984.
    6. Langer, Jannis & Infante Ferreira, Carlos & Quist, Jaco, 2022. "Is bigger always better? Designing economically feasible ocean thermal energy conversion systems using spatiotemporal resource data," Applied Energy, Elsevier, vol. 309(C).
    7. Chen, Hongjie & Zhu, Jiahua & Ge, Jing & Lu, Wei & Zheng, Lixing, 2020. "A cylindrical mixing chamber ejector analysis model to predict the optimal nozzle exit position," Energy, Elsevier, vol. 208(C).
    8. Huo, Erguang & Chen, Wei & Deng, Zilong & Gao, Wei & Chen, Yongping, 2023. "Thermodynamic analysis and optimization of a combined cooling and power system using ocean thermal energy and solar energy," Energy, Elsevier, vol. 278(PA).
    9. Xiao, Chenglong & Hu, Zheng & Chen, Yongping & Zhang, Chengbin, 2024. "Thermodynamic, economic, exergoeconomic analysis of an integrated ocean thermal energy conversion system," Renewable Energy, Elsevier, vol. 225(C).
    10. Peng, Jingping & Ge, Yunzheng & Chen, Fengyun & Liu, Lei & Wu, Haoyu & Liu, Weimin, 2022. "Theoretical and experimental study on the performance of a high-efficiency thermodynamic cycle for ocean thermal energy conversion," Renewable Energy, Elsevier, vol. 185(C), pages 734-747.
    11. Jianmei Feng & Jiquan Han & Zihui Pang & Xueyuan Peng, 2023. "Designing Hydrogen Recirculation Ejectors for Proton Exchange Membrane Fuel Cell Systems," Energies, MDPI, vol. 16(3), pages 1-10, January.
    12. Yang, Yan & Zhu, Xiaowei & Yan, Yuying & Ding, Hongbing & Wen, Chuang, 2019. "Performance of supersonic steam ejectors considering the nonequilibrium condensation phenomenon for efficient energy utilisation," Applied Energy, Elsevier, vol. 242(C), pages 157-167.
    13. Shizhen Li & Wei Li & Yanjun Liu & Chen Ji & Jingzhi Zhang, 2020. "Experimental Investigation of the Performance and Spray Characteristics of a Supersonic Two-Phase Flow Ejector with Different Structures," Energies, MDPI, vol. 13(5), pages 1-17, March.
    14. Varma, G.V. Pradeep & Srinivas, T., 2017. "Power generation from low temperature heat recovery," Renewable and Sustainable Energy Reviews, Elsevier, vol. 75(C), pages 402-414.
    15. Zhang, Wei & Li, Ye & Wu, Xiaoni & Guo, Shihao, 2018. "Review of the applied mechanical problems in ocean thermal energy conversion," Renewable and Sustainable Energy Reviews, Elsevier, vol. 93(C), pages 231-244.
    16. Barkhordarian, Orbel & Behbahaninia, Ali & Bahrampoury, Rasool, 2017. "A novel ammonia-water combined power and refrigeration cycle with two different cooling temperature levels," Energy, Elsevier, vol. 120(C), pages 816-826.
    17. Langer, Jannis & Quist, Jaco & Blok, Kornelis, 2020. "Recent progress in the economics of ocean thermal energy conversion: Critical review and research agenda," Renewable and Sustainable Energy Reviews, Elsevier, vol. 130(C).
    18. Yang, Min-Hsiung & Yeh, Rong-Hua, 2022. "Investigation of the potential of R717 blends as working fluids in the organic Rankine cycle (ORC) for ocean thermal energy conversion (OTEC)," Energy, Elsevier, vol. 245(C).
    19. Geng, Donghan & Gao, Xiangjie, 2023. "Thermodynamic and exergoeconomic optimization of a novel cooling, desalination and power multigeneration system based on ocean thermal energy," Renewable Energy, Elsevier, vol. 202(C), pages 17-39.
    20. Razmi, Amir Reza & Hanifi, Amir Reza & Shahbakhti, Mahdi, 2023. "Design, thermodynamic, and economic analyses of a green hydrogen storage concept based on solid oxide electrolyzer/fuel cells and heliostat solar field," Renewable Energy, Elsevier, vol. 215(C).

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:renene:v:161:y:2020:i:c:p:766-776. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Catherine Liu (email available below). General contact details of provider: http://www.journals.elsevier.com/renewable-energy .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.