Effect of using nanofluids and providing vacuum on the yield of corrugated wick solar still

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

doi:10.1016/j.enconman.2015.07.035

Cited by 254 publications

(44 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…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. The first was a conventional single slope solar still without any modification while the structure of the second one was modified by corrugated and wick absorbers, an internal reflector, and an external condenser.…”

Section: -Introductionmentioning

confidence: 99%

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

et al. 2017

View full text Add to dashboard Cite

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...

show abstract

Section: -Introductionmentioning

confidence: 99%

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

et al. 2017

View full text Add to dashboard Cite

show abstract

“…They found the maximum productivity of the hybrid system at 0.01 m water depth for fan rotational speeds less than 22 rpm, and at 0.03 m for speeds greater than 22 rpm. In recent times, few researcher studied the performance of solar stills by incorporating nanotechnology in order to enhance the system productivity (Kabeel et al, 2014;Omara et al, 2015;Elango et al, 2015;Saleh et al, 2017;Sharshir et al, 2017;Sahota et al, 2017). The systematic diagram of active single slope solar still (SSSS) coupled with series connected N-photovoltaic thermal partially covered flat plate collectors (N-PVT-FPC) is shown in Fig.…”

Section: Solar Still Integrated With N-photovoltaic Thermal Partiallymentioning

confidence: 99%

Review on series connected photovoltaic thermal (PVT) systems: Analytical and experimental studies

Sahota

Tiwari

2017

Solar Energy

View full text Add to dashboard Cite

“…In addition, the daily efficiencies of CSS and CnSS were approximately 60% and 35%, respectively. In other experimental study by Omara et al [19], a hybrid solar distillation system covering of corrugated and wick absorbers of solar stills was combined with an external condenser and internal reflectors to study their performance. They showed that the productivity of corrugated wick still with reflectors and external condenser was improved by about 182% over CnSS at a brine depth of 1.5 cm.…”

Section: Internal Reflectors (Ir):-mentioning

confidence: 99%

To Enhance the Performance of Solar Still With Reflectors.

Khan¹,

Nawaz²

2017

IJAR

View full text Add to dashboard Cite

Effect of using nanofluids and providing vacuum on the yield of corrugated wick solar still

Cited by 254 publications

References 39 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

Review on series connected photovoltaic thermal (PVT) systems: Analytical and experimental studies

To Enhance the Performance of Solar Still With Reflectors.

Contact Info

Product

Resources

About