کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
653461 1457511 2013 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence of particle concentration and temperature on thermal conductivity and viscosity of Al2O3/R141b nanorefrigerant
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Influence of particle concentration and temperature on thermal conductivity and viscosity of Al2O3/R141b nanorefrigerant
چکیده انگلیسی

Refrigerant-based nanofluids are termed as nanorefrigerants. They have the potential to enhance the heat transfer performances of refrigeration and air-conditioning systems. In this paper, thermal conductivity and viscosity of the Al2O3/R141b nanorefrigerant for 0.5 to 2 vol.% concentrations at temperatures of 5 to 20 °C have been investigated. Al2O3 particles with average diameters of 13 nm were used with the R141b refrigerant. The experimental results show that, thermal conductivity of the Al2O3/R141b nanorefrigerant increased with the augmentation of particle concentrations and temperatures. Besides, viscosity of the nanorefrigerant increased with the increase of volume fractions. However, this parameter decreased accordingly with the increment of temperature. The highest thermal conductivity and viscosity were observed to be 1.626 and 179 times greater than the base fluid for 2 volume concentration (%) of particles, respectively. Therefore, optimal concentrations of nanoparticles need to be dispersed in the refrigerant considering the thermal conductivity and viscosity for better heat transfer performance.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Communications in Heat and Mass Transfer - Volume 43, April 2013, Pages 100–104
نویسندگان
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