Enhancement of modified solar still integrated with external condenser using nanofluids: An experimental approach

Kabeel, A.E.; Omara, Z.M.; Essa, F.A.

doi:10.1016/j.enconman.2013.11.013

Cited by 358 publications

(85 citation statements)

References 21 publications

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“…In an economic analysis, they concluded that the use of nanoparticles and the fan lowered the final price of one-liter drinking water compared to conventional solar stills. Kabeel et al [20] evaluated the effect of using aluminum oxide based nanofluids and a fan with variable speeds and reported a maximum enhancement of 116% for a nanofluid volume concentration of 0.2% under the highest speed of the fan. In another work, Omara et al [21] experimentally compared the productivity of two solar stills with different configurations.…”

Section: -Introductionmentioning

confidence: 99%

Nanofluids effects on the evaporation rate in a solar still equipped with a heat exchanger

et al. 2017

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In this paper, the performance of a solar still equipped with a heat exchanger using nanofluids has been studied both experimentally and theoretically through three key parameters, i.e., freshwater yield, energy efficiency and exergy efficiency. First, experiments are performed on a set-up, which is mainly composed of two flat plate solar collectors connected in series, and a solar still equipped with a heat exchanger. After heated in the collectors, the nanofluid enters the heat exchanger installed in the solar still basin to exchange heat with brackish water. The research question is to know how much the effect of nanofluids on the evaporation rate inside the solar desalination system is. The experiments are conducted for different nanoparticle volume fractions, two sizes of nanoparticles (7 and 40 nm), two depths of water in the solar still basin (4 and 8 cm), and three mass flow rates of nanofluids during various weather conditions. It is found that the weather conditions (mainly the sun radiation intensity) have a dominant influence on the solar still performance. To discover the effects of nanofluids, a mathematical model is developed and validated by experimental data at given weather conditions. The results reveal that using the heat exchanger at temperatures lower than 60 o C is not advantageous and the corresponding yield is smaller than that of solar still without the heat exchanger; although in such a case, using 2 nanofluids as the working fluid in the heat exchanger can enhance the performance indices about 10%. At higher temperatures (e.g. 70 o C), the use of heat exchanger is beneficial; however, using nanofluids instead of water can augment the performance indices marginally i.e. just around 1%. In addition, it is found that in high temperatures using SiO 2 /water nanofluids, which have a lower effective thermal conductivity than that of Cu/water nanofluids, provides higher performance indices.Keywords: Nanofluids; Solar desalination; Heat exchanger; Freshwater yield 1-IntroductionNowadays, "Nano" and "Energy" have been two hot keywords, not only in the scientific community but also in our daily life. During recent decades, researchers have attempted to apply nanotechnology to various energy and power systems such as electric generators, fuel cells, batteries, and solar cells [1][2][3][4][5]. Nanotechnology has also been implemented to enhance the heat transfer potential of common liquids like water and oil to ameliorate the efficiency of thermal systems; this can be done through adding solid nanoparticles (particles with a size of 1-100 nm) to the liquids. The mixture of nanoparticles and conventional liquids is named "nanofluid" [6].Despite some limitations such as relatively high preparation cost and stability issues, extensive attempts have been made to develop the applications of nanofluids in energy systems such as solar energy based devices [7][8][9][10][11][12][13], cooling and thermal management of electronic equipment [14,15], grinding and drilling, absorption systems, medicine...

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Section: -Introductionmentioning

confidence: 99%

Nanofluids effects on the evaporation rate in a solar still equipped with a heat exchanger

et al. 2017

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“…Kabeel et al [33] used Al 2 O 3 nanoparticles with water inside a single basin solar still. Their results showed that using nanofluids improves the solar still water productivity by about 116% and 76% with and without operating the vacuum fan.…”

Section: Using Nanofluids In Solar Stillsmentioning

confidence: 99%

“…Kabeel et al [33] Al2O3/water solar still using nanofluids improves the solar still water productivity by about 116% and 76% with and without operating the vacuum fan Al-Nimr et al [34] silver-water shallow solar pond energy stored in the nanofluid pond is about 216% more than the energy stored in the brine pond Liu et al [35] CuO/water maximum and mean values of the collecting efficiency of the collector with open thermosyphon using nanofluids increased 6.6% and 12.4%, respectively.…”

Section: Using Nanofluids In Solar Pondmentioning

confidence: 99%

Performance evaluation of nanofluids in solar energy: a review of the recent literature

Bozorgan

Shafahi

2015

Micro and Nano Syst Lett

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Utilizing nanofluid as an absorber fluid is an effective approach to enhance heat transfer in solar devices. The purpose of this review is to summarize the research done on the nanofluids' applications in solar thermal engineering systems in recent years. This review article provides comprehensive information for the design of a solar thermal system working at the optimum conditions. This paper identifies the opportunities for future research as well.

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“…The basin area of solar still was 0.5m x 0.5m (0. A E Kabee [7] enhanced the performance of solar still by integrating it with external condenser & using nanofluids in it. Two solar still set up manufactured shown in fig.…”

Section: Fig 8 Variation Of Productivity With and Without Nanofluidmentioning

confidence: 99%

REVIEW OF EFFECT OF GEOMETRY & USE OF NANOFLUIDS ON PERFORMANCE OF SOLAR STILL

2017

IJAERD

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Enhancement of modified solar still integrated with external condenser using nanofluids: An experimental approach

Cited by 358 publications

References 21 publications

Nanofluids effects on the evaporation rate in a solar still equipped with a heat exchanger

Nanofluids effects on the evaporation rate in a solar still equipped with a heat exchanger

Performance evaluation of nanofluids in solar energy: a review of the recent literature

REVIEW OF EFFECT OF GEOMETRY & USE OF NANOFLUIDS ON PERFORMANCE OF SOLAR STILL

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