Properties and heat transfer mechanistic study of glycerol/choline chloride deep eutectic solvents based nanofluids

Liu, Changhui; Fang, Hui; Qiao, Yu; Zhao, Jiateng; Rao, Zhonghao

doi:10.1016/j.ijheatmasstransfer.2019.04.090

Cited by 52 publications

(34 citation statements)

References 57 publications

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“…The thermal conductivities of Reline and the DES prepared from urea and N,N-diethyl ethanol ammonium chloride were found to be higher than that of some ILs reported in the literature. Liu et al measured thermal conductivities of choline chloride/glycerol DES and its TiO 2 , Al 2 O 3 , and graphene oxide-based nanofluids [ 24 ]. They found that the thermal conductivity of the developed nanofluids increased by 3–11.4%.…”

Section: Introductionmentioning

confidence: 99%

Thermal Conductivities of Choline Chloride-Based Deep Eutectic Solvents and Their Mixtures with Water: Measurement and Estimation

et al. 2020

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The thermal conductivities of selected deep eutectic solvents (DESs) were determined using the modified transient plane source (MTPS) method over the temperature range from 295 K to 363 K at atmospheric pressure. The results were found to range from 0.198 W·m−1·K−1 to 0.250 W·m−1·K−1. Various empirical and thermodynamic correlations present in literature, including the group contribution method and mixing correlations, were used to model the thermal conductivities of these DES at different temperatures. The predictions of these correlations were compared and consolidated with the reported experimental values. In addition, the thermal conductivities of DES mixtures with water over a wide range of compositions at 298 K and atmospheric pressure were measured. The standard uncertainty in thermal conductivity was estimated to be less than ± 0.001 W·m−1·K−1 and ± 0.05 K in temperature. The results indicated that DES have significant potential for use as heat transfer fluids.

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Section: Introductionmentioning

confidence: 99%

Thermal Conductivities of Choline Chloride-Based Deep Eutectic Solvents and Their Mixtures with Water: Measurement and Estimation

et al. 2020

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“…Despite GL/ChCl and EG/ChCl DESs have been studied towards as base solvents of nanofluids, they usually restricted by poor stability and thermal conductivity. 32,49 Therefore, nanoparticle that can be dispersed in DES with superior stability and thermal conductivity would be highly desirable. To verify the feasibility of the prepared silica nanoparticle, GL/ChCl DES based nanofluids were fabricated.…”

Section: Resultsmentioning

confidence: 99%

“…However, this effect also brings some negative aspects to the behaviour of nanofluids, for example, our previous work revealed that the addition of Al 2 O 3 nanoparticle resulted in a decreasing of thermal conductivity of glycerol/chlorine DES nanofluids owing to the motion activity declining of glycerol molecule caused by the hydrogen bonding association with Al 2 O 3 . 32 Covalently installing an organic chain on the surface of nanoparticle is an efficient way to improve the stability of nanofluids in particular for organic solvent based nanofluids owing to the affinity enhancement between nanoparticle and base solvent. Some relevant research can be found in literatures, for example, Lukehart et al demonstrated the deaggregation of an oxidized ultradispersed diamond in dimethylsulfoxide (DMSO) followed by reacting with glycidol monomer to produce a covalent surface modified nanodiamond filled ethylene glycol (EG) based nanofluid.…”

Section: Introductionmentioning

confidence: 99%

Novel Silica Filled Deep Eutectic Solvent Based Nanofluids for Energy Transportation

Liu

Fang

Liu

et al. 2019

ACS Sustainable Chem. Eng.

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Liquid range of nanofluids is a crucial parameter as it intensively determines their application temperature scope. Meanwhile, improved thermal conductivity and stability are of great significances and comprise the main fundamental research topics of nanofluids. In this work, 2butoxy-3,4-dihydropyran (DP), produced from a convenient one-pot three-component reaction in water, was employed as dual lipophilic brusher and metal nanoparticle anchor. It was found that DP was able to enhance the dispersing ability and thermal conductivity of SiO 2 nanoparticle filled deep eutectic solvent (DES) based nanofluids simultaneously. The key to the success of this protocol mainly relies on the electrophilic property and acetylacetonate moiety of DP, which ensures the formation of DP surficial modified and copper nanoparticle coated silica. Molecular dynamics simulation revealed that the hydrogen bonding effect between base solvent and alkane chain of nanoparticle was responsible for the enhanced affinity, which thus resulted in an improved stability. Viscosities of the nanofluids dropped within a certain range owing to the ruin of hydrogen bonding association among solvent molecules resulted by the hydrogen bonding effect between nanoparticle and solvent. Thermal conductivity of the copper modified silica filled DES nanofluids exhibits a maximum 13.6% enhancement, which demonstrated the advantages of this chemical covalent protocol. Additionally, study upon viscosity and convective heat transfer coefficient of the nanofluids with varies types of silica nanoparticle and DES base solvents indicated that a 24.9% heat transfer coefficient enhancement was gained that further revealed the superiority of this protocol.

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“…In Figure 4, the computed thermal conductivities of aqueous reline, ethaline, and glyceline solutions at 303.15 K are shown as a function of the mass fraction of water. To the best of our knowledge, no experimental measurements of the thermal conductivity of aqueous DES solutions are available, while a few are reported for the neat DESs [26,[28][29][30]. As shown in Figure 4, computed thermal conductivities of neat reline, ethaline, and glyceline, are equal to 0.244 W•m −1 K −1 , 0.228 W•m −1 K −1 , and 0.237 W•m −1 K −1 , respectively.…”

Section: The Effect Of the Water Content On Thermal Conductivities Of Aqueous Dessmentioning

confidence: 99%

“…Despite being a key property, only a very limited number of studies in literature have focussed on the thermal conductivity of DESs. Recently, the thermal conductivities of choline chloride (ChCl)/urea [26], ChCl/glycerol [28,29], and ChCl/ethylene glycol [30] have been measured experimentally at different temperatures. It was shown that ChCl-based DESs have relatively low thermal conductivities that do not strongly depend on temperature.…”

Section: Introductionmentioning

confidence: 99%

Thermal conductivity of aqueous solutions of reline, ethaline, and glyceline deep eutectic solvents; a molecular dynamics simulation study

2021

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Accurate knowledge and control of thermal conductivities is central for the efficient design of heat storage and transfer devices working with deep eutectic solvents (DESs). The addition of water is a straightforward and cost-efficient way of tuning many properties of DESs. In this work, the thermal conductivities of aqueous solutions of reline, ethaline, and glyceline are reported for the first time. The non-equilibrium molecular dynamics Müller-Plathe (MP) method was used, along with the well-established GAFF and SPC/E force fields for DESs and water, respectively. We show that thermal conductivities of neat DESs are in excellent agreement with available experimental data. The addition of 25 wt% water results in nearly 2 times higher thermal conductivities in all DESs. A further increase in the fraction of water to 75 wt%, causes an increase in the thermal conductivities of DESs ca. 3 times. This behaviour is mainly due to the change in the microscopic structure of the DESs (i.e. hydrogen bonding) upon the addition of water. Our simulations reveal that thermal conductivities of aqueous DESs do not significantly depend on temperature. We also show that thermal conductivities strongly depend on system-size. System-sizes bigger larger than ca. 5 nm should be used.

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Properties and heat transfer mechanistic study of glycerol/choline chloride deep eutectic solvents based nanofluids

Cited by 52 publications

References 57 publications

Thermal Conductivities of Choline Chloride-Based Deep Eutectic Solvents and Their Mixtures with Water: Measurement and Estimation

Thermal Conductivities of Choline Chloride-Based Deep Eutectic Solvents and Their Mixtures with Water: Measurement and Estimation

Novel Silica Filled Deep Eutectic Solvent Based Nanofluids for Energy Transportation

Thermal conductivity of aqueous solutions of reline, ethaline, and glyceline deep eutectic solvents; a molecular dynamics simulation study

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