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Theoretical, numerical and experimental research on an innovative ocean thermal energy conversion coupled VMD desalination system

文献类型： 外文期刊

作者： Ma, Qingfen 1 ; Liu, Xuejin 1 ; Tong, Liang 1 ; Li, Jingru 1 ; Wu, Zhongye 1 ; Lu, Hui 2 ; Luo, Hongfeng 1 ; Wang, Chengpeng 3 ; Wang, Shenghui 1 ;

作者机构： 1.Hainan Univ, Coll Mech & Elect Engn, Haikou 570228, Hainan, Peoples R China

2.Chinese Acad Trop Agr Sci, Inst Environm & Plant Protect, Haikou 571101, Hainan, Peoples R China

3.MNR, Inst Seawater Desalinat & Multipurpose Utilizat, 55 Hanghai RD, Tianjin 300192, Peoples R China

关键词： Ocean thermal energy conversion; Seawater desalination; Vacuum membrane distillation; CFD simulation; Experiments

期刊名称：DESALINATION （ 影响因子：9.9； 五年影响因子：9.7 ）

ISSN： 0011-9164

年卷期： 2024 年 571 卷

页码：

收录情况： SCI

摘要： This paper proposes an OTEC-VMD desalination system that fully exploits tropical ocean thermal energy to alleviate freshwater shortages on remote islands, with no need of coupling with other heat sources. Based on an in-depth analysis of the mass and heat transfer theory of the OTEC-VMD desalination, a CFD model is established by embedding a UDF program in commercial software and an experimental prototype with a water production capacity of 1 kg/h is designed and manufactured. The CFD simulation and experimental test results show good agreement, with relative errors around 5 %. The proposed system can stably produce water, demonstrating the feasibility of OTEC-VMD seawater desalination experimentally for the first time. At a warm seawater temperature of 30 degrees C, the water production reaches 1.07 kg/h, achieving the design target. The system's water recovery ratio and specific electrical energy consumption are 0.254 % and 2.62 kWh/m 3 , respectively, and the TDS is lower than 5 mg/L. Compared to low-pressure flashing, the equipment achieves an average volume reduction rate of 94.71 %, making it more suitable for installation and transportation in remote marine locations, with great potential in replacing the low-pressure flashing device in the open -cycle of OTEC power plant to promote the large-scale application of OTEC technology.

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