Economic evaluation of energy efficient hydrate based desalination utilizing cold energy from liquefied natural gas (LNG)

Chong, Zheng Rong; He, Tianbiao; Babu, P. Ramesh; Zheng, Jia‐nan; Linga, Praveen

doi:10.1016/j.desal.2019.04.015

Cited by 99 publications

(44 citation statements)

References 53 publications

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“…Recently, He et al [35,227], Nambiar et al [228], and Chong et al [223], proposed a propanehydrate based desalination process using LNG cold energy. When compared to MSF, RO, and freezing techniques, Babu et al [229] demonstrated that this technology (the HyDesal process) can be economically attractive.…”

Section: Comparison Between Clathrate Formers For Hydrate-based Processmentioning

confidence: 99%

“…Lastly, it should be noticed that LNG and propane are flammable and explosive gases at high pressure. Thus, although its economic feasibility, also estimated by Chong et al[223], an industrial-scale testing of this process is not yet available.In addition,Table 10shows that CPH have a lower phase change enthalpy compared to CHFC 141B hydrate, CO 2 hydrate, and propane hydrate. The energy required for CPH-based desalination is hence likely less than for CHFC 141B hydrate, CO 2 hydrate, or propane hydrate…”

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confidence: 97%

“…, this process requires a remarkably low energy (0.60-0.84 kWh/m 3 ) compared to others. The cost of potable water was found to be approximately $1.11/m3 with LNG cold energy integration[223]. LNG cold energy from the LNG regasification terminals replaces the external refrigeration cycle.…”

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confidence: 99%

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Cyclopentane hydrates – A candidate for desalination?

Ho-Van

Bouillot

Douzet

et al. 2019

Journal of Environmental Chemical Engineering

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This article presents a systematic review on the past developments of Hydrate-Based Desalination process using Cyclopentane as hydrate guest. This is the first review that covers all required fundamental data, such as multiphase equilibria data, kinetics, morphology, or physical properties of cyclopentane hydrates, in order to develop an effective and sustainable desalination process. Furthermore, this state-of-the-art describes research and commercialization perspectives. When compared to traditional applications, cyclopentane hydrate-based desalination process could be a promising solution. Indeed, it operates under normal atmospheric pressure, lower operation energies are required, etc… However, there are some challenges yet to overcome. A decision aid in the form of a diagram is proposed for a new cyclopentane hydrates-based desalination process. Hopefully, concepts reviewed in this study will suggest new ideas to advance technical solutions in order to make commercial hydrate-based desalination processes a reality.

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Section: Comparison Between Clathrate Formers For Hydrate-based Processmentioning

confidence: 99%

mentioning

confidence: 97%

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Cyclopentane hydrates – A candidate for desalination?

Ho-Van

Bouillot

Douzet

et al. 2019

Journal of Environmental Chemical Engineering

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“…The energy consumption of freeze desalination has been estimated to be as low as 41.4 kJ/kg (11.5 kWh per 1000 kg of ice produced) 7 and 26.64 kJ/kg (7.4 kWh per 1000 kg of ice produced) 8 , which approaches the specific energy consumption of a RO plant, typically on the order of 7 kJ/kg (about 2 kWh/m 3 ) 9,10 . The challenges and obstacles to scaleup this technology have been recently discussed 11,12 and its combination with liquefied natural gas (LNG) technologies has been considered very promising [13][14][15][16][17] . In addition, there have also been several studies examining freeze desalination from a physicochemical perspective, investigating the depletion of ions 18 and the ice impurities and sweating 19 .…”

Section: Introductionmentioning

confidence: 99%

Brine rejection and hydrate formation upon freezing of NaCl aqueous solutions

Tsironi

Schlesinger

Späh

et al. 2020

Phys. Chem. Chem. Phys.

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Studying the freezing of saltwater on a molecular level is of fundamental importance for improving freeze desalination techniques. Here, we investigate the freezing process of NaCl solutions using a combination of x-ray diffraction and molecular dynamics simulations (MD) for different salt-water concentrations, ranging from seawater conditions to saturation. A linear superposition model reproduces well the brine rejection due to hexagonal ice Ih formation and allows us to quantify the fraction of ice and brine. Furthermore, upon cooling at T = 233 K we observe the formation of NaCl×2H2O hydrates (hydrohalites), which coexist with ice Ih. MD simulations are utilized to model the formation of NaCl crystallites. From the simulations we estimate that the salinity of the newly produced ice is 0.5% mass percent (m/m) due to ion inclusions, which is within the salinity limits of fresh water. In addition, we show the effect of ions on the local ice structure using the tetrahedrality parameter and follow the crystalite formation by using the ion coordination parameter and cluster analysis. Fig.1 A schematic phase diagram of NaCl aqueous solution.Above the melting point and in low concentration of NaCl the solution is in liquid phase. At higher concentrations, saturation leads to NaCl crystal or NaCl×2H2O hydrates formation (shown on the right). Upon decreasing the temperature below the melting point, ice is formed pushing out the salt, in a process called brine rejection. When decreasing further the temperature below 251.9 K, ice and NaCl×2H2O crystals coexist. These authors contributed equally to this work.

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“…Cravalho et al [ 7 ] first proposed a net zero work system to recover cold energy from the regasification process of LNG for seawater desalination at the end of 70 s. So far, there have been some researches on seawater desalination using hybrid methods combined with LNG cold energy. [ 8,9 ] The LNG regasification process can also be integrated into the cryogenic CO 2 capture process as discussed by Zhao et al [ 10 ] Cryogenic power generation is currently the most widely used application of LNG cold energy. [ 11 ] The overall efficiency of the LNG regasification cycle is increased using LNG cold energy to provide additional power generation work.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic Analysis of a Peak Shaving Power Station based on the Liquid Air Energy Storage System with the Utilization of Liquefied Natural Gas in the Liquefied Natural Gas Terminal

Guo

et al. 2021

Energy Tech

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The integrated system of regasification of liquefied natural gas (LNG) and liquid air energy storage (LAES) has advantages of improving the LAES system efficiency and energy grade matching utilization of the LNG cold energy. But the influence of the cold energy storage efficiency on the combined system is ambiguous and the decoupling mechanism between the energy storage and release processes with the addition of the LNG cold energy was seldom investigated. Thus, a hybrid LAES system using LNG is proposed. The thermodynamic model is established to analyze the system performance. The influence of key parameters on the system and the removal of the coupling effect are originally analyzed. The results show that the electricity storage efficiency (ηese) and exergy efficiency (ηexe) of the typical operational condition can reach 107.3% and 49.4%, respectively. With the cold energy storage efficiency varying from 0% to 100%, the ηese and ηexe increase by 18.0% and 4.4% averagely. Furthermore, to investigate the influence mechanism of introducing LNG to the LAES system, the performance of four different systems is compared. With the decoupling between the energy storage and release processes, the ηese is improved obviously and the ηexe can be maintained at a high level.

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Economic evaluation of energy efficient hydrate based desalination utilizing cold energy from liquefied natural gas (LNG)

Cited by 99 publications

References 53 publications

Cyclopentane hydrates – A candidate for desalination?

Cyclopentane hydrates – A candidate for desalination?

Brine rejection and hydrate formation upon freezing of NaCl aqueous solutions

Thermodynamic Analysis of a Peak Shaving Power Station based on the Liquid Air Energy Storage System with the Utilization of Liquefied Natural Gas in the Liquefied Natural Gas Terminal

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