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

Bozorgan, Navid; Shafahi, Maryam

doi:10.1186/s40486-015-0014-2

Cited by 73 publications

(14 citation statements)

References 36 publications

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“…It is belived that this is attributed to the fact that the nanolfuid CuO has higher thermo-physical properties compared to the other nanolfuids, including water as the heat transfer fluid. Due to the lack of experimental data published in the literature on the new concept presented hereby, to validate our numerical model, the predicted values of the efficiency of the ORC cycle at the specific conditions reported in this study were compared with what has been published in the literature on low-temperature applications of ORC , namely Sami [5][6][7]16,28], and were found to be in fair agreement with these references and Demirkaya et al [11] and Goswami [12]. In addition, the PV solar panels efficiency values reported elsewhere in this paper were also found to be in agreement with what has been published, namely, Faragli [8], and Sami [24][25][26].…”

Section: Discussion and Analysismentioning

confidence: 99%

Analysis of Nanofluids Behavior in a PV-Thermal-Driven Organic Rankine Cycle with Cooling Capability

Sami

2020

ASI

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This paper discusses the performance of nanofluids in a PV Thermal-driven Organic Rankine Cycle (ORC) with cooling capabilities. This study was intended to investigate the enhancement effect and characteristics of nanofluids; Al2O3, CuO, Fe3O4 and SiO2 on the performance the hybrid system composed of PV Thermal, ORC and cooling coil. The quaternary refrigerant mixture used in the ORC cycle to enhance the ORC efficiency is an environmentally sound refrigerant mixture composed of R152a, R245fa, R125, and R1234fy. It was shown that the enhancement of the efficiency of the hybrid system in question is significantly dependent upon not only the solar radiation but also the nanofluids concentration and the type of nanofluid as well as the fluid temperature driving the ORC. A higher hybrid system efficiency has been overserved with nanofluid CuO. Moreover, it has been also shown that on the average, the hybrid system efficiency was higher 17% with nanofluid CuO compared to water as the heat transfer fluid. In addition, it was also observed that the higher cooling effect produced is significantly increased with the use of the nanofluid CuO compared to the other nanofluids under investigation and water as heat transfer fluid. The results observed in this paper on ORC efficiency and PV solar panel efficiency are comparable to what has been published in the literature.

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Section: Discussion and Analysismentioning

confidence: 99%

Analysis of Nanofluids Behavior in a PV-Thermal-Driven Organic Rankine Cycle with Cooling Capability

Sami

2020

ASI

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“…This study also highlighted the importance of using the appropriate fluid for a specific solid phase to gain the most desirable thermal conductivity enhancements. For further information regarding the performance of nanofluids and their application in solar energy systems, the authors would like to recommend the following three recent reviews by Bozorgan & Shafahi [160], Kasaeian et al [41] and Reddy et al [161]. …”

Section: Types Of Nanofluidsmentioning

confidence: 99%

Nanofluid Types, Their Synthesis, Properties and Incorporation in Direct Solar Thermal Collectors: A Review

et al. 2017

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The global demand for energy is increasing and the detrimental consequences of rising greenhouse gas emissions, global warming and environmental degradation present major challenges. Solar energy offers a clean and viable renewable energy source with the potential to alleviate the detrimental consequences normally associated with fossil fuel-based energy generation. However, there are two inherent problems associated with conventional solar thermal energy conversion systems. The first involves low thermal conductivity values of heat transfer fluids, and the second involves the poor optical properties of many absorbers and their coating. Hence, there is an imperative need to improve both thermal and optical properties of current solar conversion systems. Direct solar thermal absorption collectors incorporating a nanofluid offers the opportunity to achieve significant improvements in both optical and thermal performance. Since nanofluids offer much greater heat absorbing and heat transfer properties compared to traditional working fluids. The review summarizes current research in this innovative field. It discusses direct solar absorber collectors and methods for improving their performance. This is followed by a discussion of the various types of nanofluids available and the synthesis techniques used to manufacture them. In closing, a brief discussion of nanofluid property modelling is also presented.

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“…Choi 1 was the first to introduce the term "nanofluid." [5][6][7][8][9][10][11][12][13][14] The efficiency of solar energy systems was proven to improve profoundly through the use of nanofluids. From the beginning of the emergence of this concept, researchers quickly figured out that the performance of thermal devices such as cooling of microchips, heating, and cooling of buildings, and solar heating, could be raised by dispersing nanopowder in a base fluid.…”

Section: Introductionmentioning

confidence: 99%

“…5 In the last decade, the efficiency of storages and solar energy conversion devices has been evaluated in a number of studies. [5][6][7][8][9][10][11][12][13][14] The efficiency of solar energy systems was proven to improve profoundly through the use of nanofluids. Using a nanofluid dish receiver, a 10% enhancement in the efficiency of solar collectors was reported by Taylor et al 6 A similar study was conducted by Shin and Banerjee, 7 Lenert and Wang, 8 and Yousefi et al 9 Shin and Banerjee 7 have noted that the efficiency benefited from the heat capacity and the thermal conductivity enhancement due to the use of nanofluids.…”

Section: Introductionmentioning

confidence: 99%

Optimal characteristics and heat transfer efficiency of SiO ₂ /water nanofluid for application of energy devices: A comprehensive study

et al. 2019

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Summary In a comprehensive study, the thermal conductivity, dynamic viscosity, and the rheological behavior of a SiO2/water nanofluid are investigated experimentally at the temperatures, solid concentrations, and the shear rates of 25°C to 50°C, 0% to 1.5%, and 400 to 1400(s−1), respectively. The Response Surface Methodology (RSM) is utilized to obtain regression models for the thermal conductivity and the dynamic viscosity. Subsequently, the sensitivity of the aforementioned models to 10% changes in the temperature, and the nanofluid concentration is analyzed. Afterward, Nondominated Sorting Genetic Algorithm II (NSGA‐II) is utilized to find the maximum thermal conductivity and the minimum viscosity. The nondominated optimal points are presented through a fitted correlation on a Pareto front to make the results more practical. The measurements of the investigated nanofluid could be summarized as a paper of a handbook. The workability of the investigated nanofluid is also examined in both laminar and turbulent flow regimes through analysis of the heat transfer merit graphs. To this end, the ratio of the dynamic viscosity enhancement to the thermal conductivity enhancement and the Mouromtseff number are chosen as two criteria of the laminar and turbulent flow regimes, respectively. Finally, the results are compared with those for SiO2/glycerin and SiO2/ethylene glycol nanofluids to check the workability in different base fluids. From a thermal‐efficiency point of view, the SiO2/water nanofluid is not suggested for use in both laminar and turbulent pipe flows, except in temperatures higher than 30°C and volume concentrations lower than 1% for the case of laminar flow. This is because the favorable heat transfer enhancement of the nanofluid is more than the unfavorable increase of the pumping power. From the rheological point of view, though, a SiO2/water nanofluid would be a good choice in lubricating moving surfaces for both laminar and turbulent flow regimes. It is found that in higher nanofluid concentrations, the thermal conductivity of a SiO2/water nanofluid is highly influenced by temperature. Moreover, adding nanoparticles at temperatures of 35°C to 40°C would have the highest increasing effect on the thermal conductivity. It is also revealed that increasing the temperature does not significantly affect the viscosity when 1% SiO2 nanoparticles are suspended within the water.

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

Cited by 73 publications

References 36 publications

Analysis of Nanofluids Behavior in a PV-Thermal-Driven Organic Rankine Cycle with Cooling Capability

Analysis of Nanofluids Behavior in a PV-Thermal-Driven Organic Rankine Cycle with Cooling Capability

Nanofluid Types, Their Synthesis, Properties and Incorporation in Direct Solar Thermal Collectors: A Review

Optimal characteristics and heat transfer efficiency of SiO ₂ /water nanofluid for application of energy devices: A comprehensive study

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

Cited by 73 publications

References 36 publications

Analysis of Nanofluids Behavior in a PV-Thermal-Driven Organic Rankine Cycle with Cooling Capability

Analysis of Nanofluids Behavior in a PV-Thermal-Driven Organic Rankine Cycle with Cooling Capability

Nanofluid Types, Their Synthesis, Properties and Incorporation in Direct Solar Thermal Collectors: A Review

Optimal characteristics and heat transfer efficiency of SiO 2 /water nanofluid for application of energy devices: A comprehensive study

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Optimal characteristics and heat transfer efficiency of SiO ₂ /water nanofluid for application of energy devices: A comprehensive study