Investigation of thermal conductivity and viscosity of Al2O3/PAG nanolubricant for application in automotive air conditioning system

Sharif, M. Z.; Azmi, W.H.; Redhwan, A. A. M.; Mamat, Rizalman

doi:10.1016/j.ijrefrig.2016.06.025

Cited by 108 publications

(28 citation statements)

References 45 publications

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“…Results found that the refrigeration effect has been enhanced by 8.1%, 8.7%, 14%, 15% and 8.7%, 9.8%, 13.15%, 14.12% for Si3N4 nanolubricant and nanolubricant with surfactant respectively corresponding to the load 1,5,10 and 15 liters in comparison with pure oil. The enhancement is due to fact that the existence of high thermal conductivity nanoparticles in the oil+ refrigerant mixture can improve the heat transfer in the evaporator and the same has been stated by [15], [18] & [19]. Also subcooling of 4ºC to 6ºC has been observed for nanolubricants and nanolubricant/surfactant which is the indication of enhancement in the refrigeration effect.…”

Section: Measurement Of Electrical Conductivity Of Nanolubricantmentioning

confidence: 64%

“…The figure presents that the viscosity of the nanolubricant and nanolubricant with surfactant increases exponentially with the increase of volume concentration and decreases with the rise of temperature with respect to pure oil. Results showed that from 0.45% concentration viscosity has been reduced which indicated the non-Newtonian behavior of the lubricant [15]. This is due to fact that at higher concentration agglomeration of nanoparticles will be more.…”

Section: Bmentioning

confidence: 92%

“…Thermal Conductivity [12], [13], [14], [15] had used KD 2 Pro thermal analyzer for the measurement of the thermal conductivity of the nanolubricants. This devise also meets the standards of the ASTM D5334 and IEEE 442-1981.…”

Section: Cmentioning

confidence: 99%

“…It is also noticed from the results that the addition of surfactant has reduced the thermal conductivity compare to Si3N4 nanolubricant. The decrement of thermal conductivity is due to fact that the mean path between liquid molecules increases and accordingly the impact of molecules will be decreased as a result the thermal conductivity decreases with raise in temperature and addition of surfactant [15].…”

Section: Amentioning

confidence: 99%

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Performance Reseach On Water Cooler With Silicon Nitride/Polyolester Nanolubricant

Ahamed¹,

Basha²,

Prasad³

et al. 2019

IJEAT

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Performance of vapour compression refrigeration depends on refrigeration effect and power utilization of the compressor. The present work focuses on reduction in power utilization of the compressor and enhancement in refrigeration effect with the supplement of silicon nitride (Si3N4) nanoparticles (NP) to the compressor lubricant polyolester (POE) oil. Also the performance of the water cooler has been compared with the addition of tetra butyl ammonia iodide (TBAI) surfactant to the nanolubricant. Thermophysical properties of the modified POE and POE/Si3N4NP/surfactant were found before experimentation to select the optimum concentration for the performance evaluation. Test results showed that the maximum thermal conductivity was improved by 31.06% for nanolubricant and 30.5% for nanolubricant with surfactant at 0.6% vol concentration. It is also seen that the viscosity has been enhanced maximum at 0.6% vol. concentration and for the same concentration the friction coefficient has been reduced by 7% and 11% for nanolubricant and nanolubricant with surfactant. Further the performance was evaluated with nanolubricant and nanolubricant/surfactant and the results were compared. It is found that the coefficient of performance (COP) has been enhanced by 36.39% and 29.6% for nanolubricant and nanolubricant/surfactant. Also the performance of the water cooler was investigated after 30 days and the results were in accordance with the initial results. Hence the experimentation shows that the addition of Si3N4 nanoadditives to the POE oil enhances the working of the water cooler.

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Section: Measurement Of Electrical Conductivity Of Nanolubricantmentioning

confidence: 64%

Section: Bmentioning

confidence: 92%

Section: Cmentioning

confidence: 99%

Section: Amentioning

confidence: 99%

See 2 more Smart Citations

Performance Reseach On Water Cooler With Silicon Nitride/Polyolester Nanolubricant

Ahamed¹,

Basha²,

Prasad³

et al. 2019

IJEAT

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“…Two step method recommended by Yu et al [8] is used in preparation of nanolubricants. The preparation of nanolubricant was according to Sharif et al [9]. The mixing started with magnetic stirrer process for half an hour.…”

Section: Materials Preparationmentioning

confidence: 99%

Thermal conductivity enhancement of Al₂O₃and SiO₂nanolubricants for application in automotive air conditioning (AAC) system

et al. 2016

Self Cite

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Abstract. Nanolubricant been introduced in compressor might improve the performance of automotive air conditioning system. Prior testing of the nanolubricant enhancement performance, thermal conductivity of Al 2 O 3 /PAG and SiO 2 /PAG nanolubricants has to be investigated and compared. Al 2 O 3 and SiO 2 nanoparticles first been dispersed in Polyalkylene Glycol (PAG) for different volume concentrations. KD2 Pro was used in determining the thermal conductivity of the nanolubricant. The experimental results showed that the thermal conductivity of the Al 2 O 3 /PAG and SiO 2 /PAG nanolubricants increased by volume concentration but decreased by temperature. The highest thermal conductivity was observed to be 0.153 W.(m K)-1 and enhancement of 1.04 times higher than the base lubricant for Al 2 O 3 with 1.0 volume concentration. Finally regression equations were developed in order to estimate the thermal conductivity for these nanolubricants.

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A review on the application of the nanofluids

Dey

Sahu

2020

Heat Trans

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Nanofluid has become popular with the advancement in nanotechnology. Nanofluid has comparatively better stability than the microfluid because here much smaller‐sized particles (nanometer size) are suspended in the base fluid. It has improved thermophysical properties and convective heat transfer coefficient than the base fluid alone. That is why researchers have implemented this novel heat transfer fluid in versatile fields. These are solar collectors, solar thermal energy storage, electronics cooling, cooling and heating, heat pipes, automobile radiator, refrigeration system, natural convection, quenching, and many other applications. These varied applications indicate that in imminent future nanofluid will play a major role in these fields. Though all these trials are at present at academic research level, however, with the advancement in nanotechnology, surface science, colloidal chemistry, and so forth this nanofluid will definitely play a major role in heat transfer in the coming days.

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Investigation of thermal conductivity and viscosity of Al2O3/PAG nanolubricant for application in automotive air conditioning system

Cited by 108 publications

References 45 publications

Performance Reseach On Water Cooler With Silicon Nitride/Polyolester Nanolubricant

Performance Reseach On Water Cooler With Silicon Nitride/Polyolester Nanolubricant

Thermal conductivity enhancement of Al₂O₃and SiO₂nanolubricants for application in automotive air conditioning (AAC) system

A review on the application of the nanofluids

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Investigation of thermal conductivity and viscosity of Al2O3/PAG nanolubricant for application in automotive air conditioning system

Cited by 108 publications

References 45 publications

Performance Reseach On Water Cooler With Silicon Nitride/Polyolester Nanolubricant

Performance Reseach On Water Cooler With Silicon Nitride/Polyolester Nanolubricant

Thermal conductivity enhancement of Al2O3and SiO2nanolubricants for application in automotive air conditioning (AAC) system

A review on the application of the nanofluids

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Product

Resources

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Thermal conductivity enhancement of Al₂O₃and SiO₂nanolubricants for application in automotive air conditioning (AAC) system