Experimental study on the heat transfer characteristics of nanorefrigerants in an internal thread copper tube

Sun, Bin; Yang, Di

doi:10.1016/j.ijheatmasstransfer.2013.04.031

Cited by 52 publications

(22 citation statements)

References 33 publications

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“…Summaries of experimental result shows in Table 1. Furthermore, in [7] using method preparation of Cu-R141b, Al-R141b, Al2O3-R141b and CuO-R141b nanorefrigerant. The nanoparticle directly mixed to measured amount of refrigerant based on required of concentration studies.…”

Section: Alternative Refrigerantmentioning

confidence: 99%

Recent progress of nanorefrigerant development: a review

Rehim

Nawi

2018

J. Fundam and Appl Sci.

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Section: Alternative Refrigerantmentioning

confidence: 99%

Recent progress of nanorefrigerant development: a review

Rehim

Nawi

2018

J. Fundam and Appl Sci.

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“…Reported works point to different levels of thermophysical properties enhancement, depending on the nanoparticle used and the base fluid/nanoparticle ratio. recorded a 104% enhancement in thermal conductivity over that of a base fluid of R113 by introducing Carbon Nanotubes (CNT) nanoparticle, Peng et al (2010) experimented with nanorefrigerant produced from R113 and CNT and observed an increase of 61% in nucleate boiling, Sun and Yang (2013) reported an increase of 17-25% and 3 -20% respectively for maximum heat transfer coefficient and average heat transfer coefficient values while testing nanorefrigerants produced from R141b and Cu, Al, Aluminum Oxide (Al2O3) and Cupper Oxide (CuO) while Henderson et al (2010) recorded over 100% increase in boiling heat transfer coefficient with nanorefrigerant produced from R134a and CuO. While these may not be the only thermophysical properties of concern for a refrigerant, studies have shown that they are all reasonably affected (either positively or negatively) by the addition of nanoparticles to the base refrigerant.…”

Section: Preparation Of Nanorefrigerants and Thermal Improvements Achmentioning

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 nanorefrigerant containing TiO 2 nanoparticles of 0.1 wt.% displayed the highest energy savings-up to 25%. Sun and Yang [20] studied the use of R141b/Cu, R141b/Al, R141b/Al 2 O 3 , and R141b/CuO nanorefrigerants in a computer-aided test section to investigate the effects of material types and vapor quality on flow boiling heat transfer inside a horizontal tube. For the same mass fraction, the Cu-R141b nanorefrigerant had the highest heat transfer coefficient, and R141b/CuO gives the minimum heat transfer coefficient.…”

Section: Hindawi Publishing Corporation Advances In Mechanical Enginementioning

confidence: 99%

A Theoretical Comparative Study on Nanorefrigerant Performance in a Single-Stage Vapor-Compression Refrigeration Cycle

Aktaş

Dalkılıç

Çelen

et al. 2014

Advances in Mechanical Engineering

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The topic of nanofluid heat transfer is certainly of interest to the heat transfer community. Nanorefrigerants are a type of nanofluids that are mixtures of nanoparticles and pure refrigerants. This paper focuses on five different nanorefrigerants with Al 2 O 3 nanoparticles and their pure fluids: R12, R134a, R430a, R436a, and R600a. The coefficient of performance (COP) and compressor work for various evaporation and condensation temperatures are investigated. A method is developed to estimate the performance characteristics of nanorefrigerants in the refrigerant cycles for the nonsuperheating/subcooling case and superheating/subcooling case. The enthalpy of nanorefrigerants is obtained through the density. The validation process of the proposed method was accomplished with the available data in the literature. The results indicate that COP is enhanced by adding nanoparticles to the pure refrigerant and maximum values obtained using the R600a/Al 2 O 3 mixture.

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Experimental study on the heat transfer characteristics of nanorefrigerants in an internal thread copper tube

Cited by 52 publications

References 33 publications

Recent progress of nanorefrigerant development: a review

Recent progress of nanorefrigerant development: a review

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

A Theoretical Comparative Study on Nanorefrigerant Performance in a Single-Stage Vapor-Compression Refrigeration Cycle

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