A comprehensive review of fundamentals, preparation and applications of nanorefrigerants

Alawi, Omer A.; Sidik, Nor Azwadi Che; Mohammed, Hussein A.

doi:10.1016/j.icheatmasstransfer.2014.03.001

Cited by 57 publications

(23 citation statements)

References 50 publications

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“…Energies 2016, 9, 22 13 Figure 17 shows that the freezing rate is slightly higher with the system with nanoparticles as compared to the POE oil system. The authors concluded that along with performance, the solubility between refrigerant and lubricant was also improved.…”

Section: Nanolubricantsmentioning

confidence: 98%

“…The authors also reviewed the effects of nanolubrication on boiling and two-phase flow phenomena. Sidik et al [13] presented a comprehensive review of nucleate pool boiling, flow boiling, condensation, and two-phase flow of refrigerant-based nanofluids. Celen et al [14] presented a review on the nanofluid flow characteristics and tried to clarify the effect of nanorefrigerant properties on heat transfer and pressure drop as compared to a base refrigerant.…”

Section: Introductionmentioning

confidence: 99%

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Review of the Thermo-Physical Properties and Performance Characteristics of a Refrigeration System Using Refrigerant-Based Nanofluids

Patil

Kim

Seo³

et al. 2015

Energies

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Nanofluids are considered a promising choice for several heat transfer applications. With the increasing awareness for energy saving and efficiency improvement in various thermal systems, including refrigeration systems, there is a growing interest in the refrigerant-based nanofluids owing to their superior thermo-physical properties. Nanorefrigerants are a class of nanofluid, which consist of suspended nanoparticles in a base refrigerant. In this paper, it is intended to include many articles on refrigeration systems that use nanorefrigerants, published in the period from 2005 to 2015. Although this is an extensive review, it could not include all the papers, and only some major research works were selected. It is believed that the dependency of thermal conductivity and other properties on temperature will make the thermal systems more efficient while operating at a high temperature. The literature reviews associated with the performance characteristics of nanorefrigerants in refrigeration systems for the last 10 years have been compiled and presented in this paper. Furthermore, recent studies related to thermo-physical properties of nanorefrigerants and nanolubricants have also been summarized and reviewed in this paper.

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Section: Nanolubricantsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Review of the Thermo-Physical Properties and Performance Characteristics of a Refrigeration System Using Refrigerant-Based Nanofluids

Patil

Kim

Seo³

et al. 2015

Energies

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“…This is obvious from the method of preparation detailed in Alawi et al (2014) and Yang et al (2012), which will require getting a specified mass of nanoparticle and mixing it with a known volume of the host fluid (refrigerant). Alawi et al (2014) observed that preparation of nanorefrigerants when the host fluid is in liquid state at room temperature and atmospheric pressure, is easier than when they are in vapour state at room temperature and atmospheric pressure. Such cases will most likely lead to more nanoparticle contact or discharge to the environment during preparation.…”

Section: A Typical Refrigeration Cyclementioning

confidence: 99%

Regulation of Nanorefrigerant Use: A Proactive Measure Against Possible Undesirable Health and Environmental Implications

Ogueke

Emekwuru

2017

European Journal of Sustainable Development Research

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Recent research studies have shown the very high potentials nanotechnology application has in the refrigeration and air conditioning industry for improving the thermophysical properties of refrigerants and lubricants hence leading to systems with higher COP and much reduced size. The successes achieved with nanorefrigerants are connected to the improved technology for the preparation of nanofluids that has led to achieving more homogeneous and stable mixture of the base fluid and nanoparticle. However, available literatures point to the fact that nanoparticles can find its way into the human cells and as such is a potential health risk for humans and animals. At present, emphasis appears to concentrate more on the technological successes achieved with nanorefrigerants, like improved thermal conductivity, nucleate boiling and boiling heat transfer coefficient without factoring in much the potential health implications of adopting it. This paper therefore looked at the potential health consequences of adopting nanotechnology and called for an early regulatory framework to guard against any unforeseen health issues. Areas of future research were also suggested.

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“…The nanolubricants were observed for sedimentation for 48 hours. Agglomeration or sedimentation did not occur and the nanolubricants were stable during the observations, which could be due to the low volume concentrations of the nanoparticles [36,37].…”

Section: Experimental Setup Preparation Of Nanolubricantsmentioning

confidence: 99%

Performance of a domestic refrigerator using nanoparticles-based polyolester oil lubricant

Haque¹,

Bakar²,

Kadirgama³

et al. 2016

J. Mech, Eng, Sci.

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The performance of a domestic refrigerator with the addition of nanoparticles in the lubricant was experimentally investigated. Different sizes of nanoparticles of Al2O3 and TiO2 were added to the polyolester (POE) oil in two different volume concentrations (0.05 and 0.1 vol.%). Energy consumption tests and freeze capacity tests were then performed on the refrigerator. The investigation results showed that the refrigerator worked normally and safely with the nanolubricants. The results of the experiments indicated that the refrigerator performed better with nanolubricants as compared to pure POE oil. The COP of the systems was increased by 19% and 22% when 0.05% and 0.1% Al2O3 nanoparticles were added to the POE oil respectively. The system with 0.1% volume concentration of Al2O3 and TiO2 nanoparticles added to the POE oil consumed 27.73% and 14.19% less energy as compared to the pure POE oil system. Hence, this study showed that the addition of nanoparticles in the lubricant oil of the refrigerator is practical and it enhanced the performance of the refrigerator

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A comprehensive review of fundamentals, preparation and applications of nanorefrigerants

Cited by 57 publications

References 50 publications

Review of the Thermo-Physical Properties and Performance Characteristics of a Refrigeration System Using Refrigerant-Based Nanofluids

Review of the Thermo-Physical Properties and Performance Characteristics of a Refrigeration System Using Refrigerant-Based Nanofluids

Regulation of Nanorefrigerant Use: A Proactive Measure Against Possible Undesirable Health and Environmental Implications

Performance of a domestic refrigerator using nanoparticles-based polyolester oil lubricant

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