Analyses of ice slurry formation using direct contact heat transfer

Hawlader, Mohammad Nurul Alam; Wahed, Arifeen

doi:10.1016/j.apenergy.2008.11.003

Cited by 43 publications

(6 citation statements)

References 11 publications

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“…And the use of small‐sized droplets in ice storage systems is also a better choice. Hawlader et al 50 investigated the formation process of the ice layer, using the ice formed on the surface of a supercooled metal sphere instead of ice on the surface of the HTF. According to the conclusion, a muddy layer exists between the ice and water during charging, and the thickness of the ice layer increases with the diameter of the HTF droplets.…”

Section: Research On the Direct Contact Heat Transfer Processmentioning

confidence: 99%

Research progress of direct contact heat storage based on phase change heat storage

Liu,

Wang,

Chen

et al. 2024

Energy Storage

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Phase change heat storage presents a promising solution to address challenges related to new energy intermittency and waste heat recovery. However, for it to function as an effective energy hub, heat storage becomes crucial. Among the available options, the direct contact heat accumulator stands out due to its simple structure, substantial heat transfer area, and minimal heat transfer resistance, making it a favorable choice for enhancing energy storage rates. Although a great deal of research has been done on phase change materials and heat accumulators over the years, a systematic review of direct‐contact heat accumulators is lacking. This article reviews the related research on direct contact heat storage, aiming to summarize the research work on direct contact phase change heat storage systems. Various phase change materials (PCMs) for direct contact systems are analyzed, and the study of PCM melting crystallization behavior, heat transfer coefficients and system performance in direct contact systems is summarized, as well as the improvement methods for direct contact vessels and PCMs. It provides a useful reference for future research on direct‐contact heat storage systems.

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Section: Research On the Direct Contact Heat Transfer Processmentioning

confidence: 99%

Research progress of direct contact heat storage based on phase change heat storage

Liu,

Wang,

Chen

et al. 2024

Energy Storage

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“…It is well-known that the flow pattern in phases mixing process is not eternally fixed and changes greatly with the passage of time. 27–29 In nature, the bubbles in the DCHE presents remarkable kinetic characteristic. The imbalance of bubbles movement may be extremely complicated as a result of the coupled interactions.…”

Section: Introductionmentioning

confidence: 99%

Interplay of fluids mixing and heat transfer in a dual-loop ORC direct contact heat exchanger used for waste heat utilization

Xiao

Luo

Huang

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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By bringing two immiscible fluids at different temperatures into a direct contact heat exchanger (DCHE), bubble swarms are produced in the dual-loop ORC direct contact boiling heat transfer process. The aim of this paper is to make effort to explore the interplay between mixing state quality and heat transfer performance of fluids in the DCHE. Through flow visualization of this mixing process, a simple image analysis technique is introduced to represent the formation and evolution of vapor around the injected coolant droplets. Description of the boiling heat transfer process is here achieved by average volumetric heat transfer coefficient (VHTC). Experimental results attest that the proposed mixing index is powerful and sufficient compared with the Betti numbers method for the mixing quality quantification of bubbles inside DCHE. The synergistic association between the fluids mixing process and the heat transfer process is investigated by statistical regression model of new mixing index and VHTC. The contributions, including the data from monitoring practice in ORC heat transfer system and the proposed way, are presented to delve into the transient behaviors comparison of various fluids mixing and heat transfer processes conveniently.

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“…Peng et al conducted systematic experiments based on a liquid–liquid fluidized bed and investigated the dynamics of drops formation in the application to generate ice slurry. With respect to numerical simulation approaches, Hawlader et al developed an analytical model to predict the growth of ice around the injected supercooled coolant drops and found that both drop diameters and initial liquid temperatures play an important role in the ice formation around the supercooled liquid surface. Monteiro et al presented the pressure drop behavior of ice slurry based on the rheological models and provided correlations for pressure drop as a function of various operating parameters.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of drop formation in a co‐current liquid–liquid flow for ice slurry making system

Zhang

Xue

Geng

et al. 2018

Asia-Pacific J Chem Eng

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Ice slurry is used widely as phase change materials (PCMs) to reduce the peak demand for power system. Drop formation plays a key role during ice slurry production in liquid-liquid circulating fluidized bed. In the present work, drop formation in a co-current liquid-liquid flow was investigated via a 3D model. Volume of fluid method was adopted to study drop characteristics by tracking the interface. Major influences of the water velocity, the oil velocity, the jet size, and the jet number on drop formation were analyzed for drop characteristics. The results indicate that properties of drop formation vary significantly according to the different conditions. The drop size was distributed mainly as the normal distribution, and the average drop diameter varies with different conditions. The drop size varies from 0.7 to 1.9 mm at the water velocity of 0.5 m/s, whereas the size of drop size varies from 1.8 to about 2.65 mm at the water velocity of 1.5 m/s. Furthermore, the residence time of drop decreases obviously with the increase of the oil velocity. When the oil velocity is 0.1 m/s, a drop leaves the top outlet at about 0.44 s. When the oil velocity is 0.3 m/s, a drop reaches the outlet at about 0.15 s. Additionally, the simulated results were compared with the relevant experimental results and the previous simulated results. Reasonable agreements have been gained, which can validate the established model to some extent.

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Analyses of ice slurry formation using direct contact heat transfer

Cited by 43 publications

References 11 publications

Research progress of direct contact heat storage based on phase change heat storage

Research progress of direct contact heat storage based on phase change heat storage

Interplay of fluids mixing and heat transfer in a dual-loop ORC direct contact heat exchanger used for waste heat utilization

Numerical investigation of drop formation in a co‐current liquid–liquid flow for ice slurry making system

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