Preparation and Thermophysical Properties of Water–Glycerol Mixture-Based CuO Nanofluids as PCM for Cooling Applications

Harikrishnan, S.; Roseline, A. Ameelia; Kalaiselvam, S.

doi:10.1109/tnano.2013.2265753

Cited by 31 publications

(5 citation statements)

References 24 publications

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“…This technique is based on joining a foam or a metal structure having a porosity in the order of 90% with a PCM by compression or impregnation. Researchers have already applied this technique mainly with copper [60][61][62][63][64] as shown in Figure 9. Composite PCM using paraffin and graphite foams was studied by Zhang et al 65 This study detected that when the pores are small and the graphite ligament is thick, higher thermal diffusivity could be achieved.…”

Section: Improvement Of the Global Conductivity Of Pcmmentioning

confidence: 99%

A comprehensive review of heat transfer intensification methods for latent heat storage units

et al. 2020

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Latent heat thermal energy storage (LHTES) systems and their applications have been very substantive for the developments in energy science and engineering. The efficiency of LHTES systems largely depends on the thermal conductivity of the phase change materials (PCMs) and the heat transfer mechanisms in them. This review focuses on the methods employed to enhance heat transfer in LHTES systems which accordingly improve their storage performance. This includes the possible geometrical configurations of LHTES systems and the effects of their design parameters. The various methods adopted for enhancing LHTES systems' performance through either applying nanomaterials additives, using cascaded or encapsulated PCMs, or employing extended surfaces, such as fins, are discussed in detail. Additionally, various designs of PCM based heat exchangers with active and passive heat transfer techniques were highlighted. These systems are critically analyzed to help selecting reliable techniques and compatible materials for effective designs in order to achieve more efficient LHTES systems. This review would be helpful for the researchers to further develop heat transfer intensification mechanisms in LHTES systems.

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Section: Improvement Of the Global Conductivity Of Pcmmentioning

confidence: 99%

A comprehensive review of heat transfer intensification methods for latent heat storage units

et al. 2020

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“…Thus, future investigations on λ eff of nanofluids should aim to address the influencing factors such as, e.g., the thermal conductivities of the particles and the base fluid as well as the morphology and internal structure of the particles. While most research on nanofluids focuses on water and ethylene glycol as underlying base fluids, glycerol featuring a similar thermal conductivity as ethylene glycol, but a distinctly larger viscosity has been considered only in a few studies [20][21][22]. Regarding metal-oxide nanoparticles dispersed in liquids, copper, alumina, titania, and silica in its crystalline form are commonly studied [6,15,16].…”

Section: Introductionmentioning

confidence: 99%

Effective Thermal Conductivity of Nanofluids Containing Silicon Dioxide or Zirconium Dioxide Nanoparticles Dispersed in a Mixture of Water and Glycerol

et al. 2022

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The present study investigates the effective thermal conductivity of nanofluids containing crystalline or amorphous silicon dioxide (SiO2), or zirconium dioxide (ZrO2) nanoparticles dispersed in a mixture of water and glycerol with a mass ratio of 60:40. Such fluids are relevant as potential cutting fluids in tribology and feature a broad distribution of irregularly shaped non-spherical particles of dimensions on the order of (100 to 200) nm that were produced by comminution of larger particles or particle aggregates. A new steady-state guarded parallel-plate instrument was applied for the absolute measurement of the effective thermal conductivity of the nanofluids with an expanded uncertainty (coverage factor k = 2) of 3% for temperatures from (293 to 353) K and particle volume fractions up to 0.1. For a constant volume fraction of 0.03 for the three particle types, the measured thermal-conductivity ratios, i.e. the effective thermal conductivity of the nanofluids relative to the thermal conductivity of the base fluid, are less than 1.05 and not affected by temperature. In the case of the nanofluids with crystalline SiO2, with increasing particle volume fraction from 0.03 to 0.10 the thermal-conductivity ratios increase up to values of about 1.18 for all temperatures. A comparison of the measurement results with the Hamilton-Crosser model and an analytical resistance model for the effective thermal conductivity of nanofluids shows that the former one allows for better predictions for the present nanofluids with a relatively large viscosity. In this context, it could be shown that detailed knowledge about the sphericity and thermal conductivity of the dispersed nanoparticles is required for the modeling approaches.

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“…Their results show that the PCM can be used in thermal energy storage systems. 4 Kaviarasn, et al researched the presence of different types of phase change materials and also the different types of nanoparticles present. They have given an idea of the applications of adding nanoparticles to PCMs.…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of lauric acid embedded with nanoparticles as phase change materials in heat transfer applications

Elangovan

Palanisamy

2022

Proceedings of the Institution of Mechanical Engineers, Part E:

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Phase change materials can be the most suitable way to enhance the thermal performance of a heat exchanger, and it is one of the important parameters for various developments in renewable energy and engineering applications for a sustainable future. At the time of phase change, the phase change material can store energy and release that stored energy in the form of heat. It is an eminent candidate for different engineering sectors, including thermal, electronics, civil, and textile. In this research, we used lauric acid as a phase change material and copper oxide, aluminium oxide as nanoparticles experimentally. The characterisation tests such as Thermogravimetric analysis, Fourier Transform Infrared Spectroscopy, Ultraviolet-visible, Thermal Conductivity, X-Ray Diffraction, Field Emission Scanning Election Microscope were carried out on the phase change materials and nano phase change materials. The phase change materials are tested individually to analyse the heat transfer rate of the heat exchanger for a specific period of time at three different inlet temperatures. The thermal conductivity of the phase change material is improved by the addition of copper oxide and aluminium oxide nanoparticles to it. By adding Aluminium oxide and copper oxide nanoparticles to the lauric acid, the heat storage capacity is increased by 16.52%, 38.89% at 60°C, 17.75%, 41.33% at 70°C, and 22.67%, 46.17% at 80°C respectively. Copper oxide is the most suitable nanomaterial to improve the thermal conductivity of low thermal conductive phase change materials, since it has properties like high thermal conductivity, low thermal interface resistance, and high aspect ratio. The heat energy stored in phase change materials is increased due to the addition of nanoparticles. In future, a suitable optimization technique can be employed to predict the optimum nanoparticle weight percentage to get improved thermal performance.

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Preparation and Thermophysical Properties of Water–Glycerol Mixture-Based CuO Nanofluids as PCM for Cooling Applications

Cited by 31 publications

References 24 publications

A comprehensive review of heat transfer intensification methods for latent heat storage units

A comprehensive review of heat transfer intensification methods for latent heat storage units

Effective Thermal Conductivity of Nanofluids Containing Silicon Dioxide or Zirconium Dioxide Nanoparticles Dispersed in a Mixture of Water and Glycerol

Performance analysis of lauric acid embedded with nanoparticles as phase change materials in heat transfer applications

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