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A novel conceptual design of hydrate based desalination (HyDesal) process by utilizing LNG cold energy

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  • He, Tianbiao
  • Nair, Sajitha K.
  • Babu, Ponnivalavan
  • Linga, Praveen
  • Karimi, Iftekhar A.

Abstract

Liquefied Natural Gas (LNG) is the best mode to transport natural gas from producing locations to importing countries when pipeline transport is not feasible. LNG industry has seen a phenomenal growth due to the widespread adoption of natural gas as a clean fuel. There is an ongoing effort to develop new technologies that can utilize LNG cold energy which is mostly being wasted at the LNG regasification terminals around the world. This work presents a novel conceptual design for a clathrate hydrate based desalination (HyDesal) process by utilizing LNG cold energy (ColdEn-HyDesal). This ColdEn-HyDesal process overcomes the high energy consumption of the traditional HyDesal process by using the cold energy of LNG to replace the external refrigeration cycle. An optimal heat exchanger network for the ColdEn-HyDesal process is obtained by employing mathematical programming based heat integration methodology for the LNG flow rate of 1000 kg/h in an LNG regasification terminal. The results indicate that the specific energy consumption (SEC) of the HyDesal process is 65.29 kWh/m3 of potable water, while that of the ColdEn-HyDesal process is only 0.60 kWh/m3 when the hydrate former is not recycled. When the hydrate former is recycled, then the specific energy consumption of the HyDesal process is 65.13 kWh/m3, while that of the ColdEn-HyDesal process is only 0.84 kWh/m3. In addition, the effects of recovery pressure, water recovery rate, and NaCl concentration in seawater on SEC and the volumetric rate of potable water are also analyzed and discussed. The results show that the SEC decreases substantially (27.42%) with the increase of water recovery from 40% to 70% in one hour. Further, the NaCl concentration in the feed has a small impact on the SEC, which only increases by 2.81% when the NaCl concentration increases from 3.5 wt% to 7.0 wt%. Thus, the ColdEn-HyDesal process is an energy efficient desalination process and can be a potential technology to desalinate seawater, and high concentration brines in an LNG regasification terminal.

Suggested Citation

  • He, Tianbiao & Nair, Sajitha K. & Babu, Ponnivalavan & Linga, Praveen & Karimi, Iftekhar A., 2018. "A novel conceptual design of hydrate based desalination (HyDesal) process by utilizing LNG cold energy," Applied Energy, Elsevier, vol. 222(C), pages 13-24.
    • Handle: RePEc:eee:appene:v:222:y:2018:i:c:p:13-24
    DOI: 10.1016/j.apenergy.2018.04.006
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    Cited by:

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    5. He, Tianbiao & Lv, Hongyu & Shao, Zixian & Zhang, Jibao & Xing, Xialian & Ma, Huigang, 2020. "Cascade utilization of LNG cold energy by integrating cryogenic energy storage, organic Rankine cycle and direct cooling," Applied Energy, Elsevier, vol. 277(C).
    6. Bhattacharjee, Gaurav & Veluswamy, Hari Prakash & Kumar, Rajnish & Linga, Praveen, 2020. "Seawater based mixed methane-THF hydrate formation at ambient temperature conditions," Applied Energy, Elsevier, vol. 271(C).
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    9. Wu, Wencong & Xie, Shutao & Tan, Jiaqi & Ouyang, Tiancheng, 2022. "An integrated design of LNG cold energy recovery for supply demand balance using energy storage devices," Renewable Energy, Elsevier, vol. 183(C), pages 830-848.
    10. Ge, Minghui & Li, Zhenhua & Wang, Yeting & Zhao, Yulong & Zhu, Yu & Wang, Shixue & Liu, Liansheng, 2021. "Experimental study on thermoelectric power generation based on cryogenic liquid cold energy," Energy, Elsevier, vol. 220(C).
    11. Qyyum, Muhammad Abdul & Qadeer, Kinza & Minh, Le Quang & Haider, Junaid & Lee, Moonyong, 2019. "Nitrogen self-recuperation expansion-based process for offshore coproduction of liquefied natural gas, liquefied petroleum gas, and pentane plus," Applied Energy, Elsevier, vol. 235(C), pages 247-257.
    12. Zbigniew Rogala & Arkadiusz Brenk & Ziemowit Malecha, 2019. "Theoretical and Numerical Analysis of Freezing Risk During LNG Evaporation Process," Energies, MDPI, vol. 12(8), pages 1-19, April.
    13. Tian, Zhen & Qi, Zhixin & Gan, Wanlong & Tian, Molin & Gao, Wenzhong, 2022. "A novel negative carbon-emission, cooling, and power generation system based on combined LNG regasification and waste heat recovery: Energy, exergy, economic, environmental (4E) evaluations," Energy, Elsevier, vol. 257(C).
    14. He, Tianbiao & Mao, Ning & Liu, Zuming & Qyyum, Muhammad Abdul & Lee, Moonyong & Pravez, Ashak Mahmud, 2020. "Impact of mixed refrigerant selection on energy and exergy performance of natural gas liquefaction processes," Energy, Elsevier, vol. 199(C).
    15. Sa, Jeong-Hoon & Sum, Amadeu K., 2019. "Promoting gas hydrate formation with ice-nucleating additives for hydrate-based applications," Applied Energy, Elsevier, vol. 251(C), pages 1-1.
    16. Foroutan, Shima & Mohsenzade, Hanie & Dashti, Ali & Roosta, Hadi, 2021. "New insights into the evaluation of kinetic hydrate inhibitors and energy consumption in rocking and stirred cells," Energy, Elsevier, vol. 218(C).
    17. Seungyeop Baek & Wontak Choi & Gyuchang Kim & Jaedeok Seo & Sanggon Lee & Hyomin Jeong & Yonmo Sung, 2022. "Liquefied Natural Gas Cold Energy Utilization for Land-Based Cold Water Fish Aquaculture in South Korea," Energies, MDPI, vol. 15(19), pages 1-13, October.
    18. Kiwan, Suhil & Alali, Abdullah & Al-Safadi, Mohammad, 2023. "A novel water freezing desalination plant integrated into a combined gas power cycle plant," Energy, Elsevier, vol. 263(PD).
    19. Cheng, Chuanxiao & Wang, Fan & Tian, Yongjia & Wu, Xuehong & Zheng, Jili & Zhang, Jun & Li, Longwei & Yang, Penglin & Zhao, Jiafei, 2020. "Review and prospects of hydrate cold storage technology," Renewable and Sustainable Energy Reviews, Elsevier, vol. 117(C).

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