Evaluation of the thermal performance of various nanofluids used to harvest solar energy

Alshuraiaan, Bader

doi:10.1007/s40974-021-00213-6

Cited by 8 publications

(3 citation statements)

References 28 publications

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“…In the concentration range of 2.0-2.2% SiO 2 the heat capacity decreases by 0.14 kJ/kgK, 2.6-3.0% MgO: by 0.12 kJ/kgK, 3.0-3.6% CuO: by 0.1 kJ/kgK, 3.38-3.88% Cu: by 0.12 kJ/kgK, after which the rate of change of the index decreases. As can be seen from Figure 3, nanofluids tend to decrease isobaric heat capacity, but because their thermal conductivity is higher than that of the base fluid, nanofluids are more efficient heat carriers [25]. Thus, further increasing the number of nanoparticles has almost no effect on the change in thermal conductivity.…”

Section: Resultsmentioning

confidence: 98%

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Improving the efficiency of solar-driven trigeneration systems using nanofluid coolants

Alshuraiaan

2023

STET

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This article is intended to evaluate methods to improve the efficiency of trigeneration plants, which are designed for the co-generation of heat, electricity, and cold. The possibility of using nanofluids with the addition of oxides of aluminum, silicon, magnesium, and copper, as well as copper itself in the concentration range of 1–6% has been analyzed. The results show that the use of nanofluids can increase the exergic efficiency of the system to 22.9–27.8% and increase thermal efficiency by 23.2–26.7%. It was found that nanofluids have low heat capacity, which may be one of the factors that increase the overall efficiency of trigeneration plants up to 43–60%. Magnesium oxide proved to be the most efficient for generating electricity, with 212.8 kW, aluminum oxide (197.5 kW) for cooling, and copper oxide for generating 98 kW of heat. The Pearson criterion was χ2 = 0.87, Student’s t-test 0.07–0.09, statistical significance of results p ≤ 0.005.

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Section: Resultsmentioning

confidence: 98%

“…To assess the reliability of calculating the energy efficiency of solar collectors for the generation of heat, cold, and electricity in trigeneration plants, it was decided to calculate Student's and Pearson's criteria and the statistical significance of the results according to Alshuraiaan [25].…”

Section: Statisticsmentioning

confidence: 99%

Improving the efficiency of solar-driven trigeneration systems using nanofluid coolants

Alshuraiaan

2023

STET

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“…Some have also introduced these types of suspensions to heat transfer systems containing structures made of phase changing materials (PCM), even fabricating nanofluids out of nanocomposites that are made of, for example, graphene with PCM embedded into the pores [ 15 ]. When it comes to graphene-based nanofluids, researchers have employed it as a working fluid to enhance oil recovery [ 16 , 17 ], cooling hybrid photovoltaic thermal collectors [ 18 ], solar harvesting [ 19 ], and many more [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

Graphene-Based Nanofluids: Production Parameter Effects on Thermophysical Properties and Dispersion Stability

Ali

2022

Nanomaterials

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In this study, the thermophysical properties and dispersion stability of graphene-based nanofluids were investigated. This was conducted to determine the influence of fabrication temperature, nanomaterial concentration, and surfactant ratio on the suspension effective properties and stability condition. First, the nanopowder was characterized in terms of crystalline structure and size, morphology, and elemental content. Next, the suspensions were produced at 10 °C to 70 °C using different concentrations of surfactants and nanomaterials. Then, the thermophysical properties and physical stability of the nanofluids were determined. The density of the prepared nanofluids was found to be higher than their base fluid, but this property showed a decrease with the increase in fabrication temperature. Moreover, the specific heat capacity showed very high sensitivity toward the graphene and surfactant concentrations, where 28.12% reduction in the property was achieved. Furthermore, the preparation temperature was shown to be the primary parameter that effects the nanofluid viscosity and thermal conductivity, causing a maximum reduction of ~4.9% in viscosity and ~125.72% increase in thermal conductivity. As for the surfactant, using low concentration demonstrated a short-term stabilization capability, whereas a 1:1 weight ratio of graphene to surfactant and higher caused the dispersion to be physically stable for 45 consecutive days. The findings of this work are believed to be beneficial for further research investigations on thermal applications of moderate temperatures.

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Characterization of Al2O3, TiO2, hybrid Al2O3-TiO2 and graphene oxide nanofluids and their performance evaluations in photovoltaic thermal system

Rubaiee,

Yahya,

Fazal

et al. 2023

J Therm Anal Calorim

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Evaluation of the thermal performance of various nanofluids used to harvest solar energy

Cited by 8 publications

References 28 publications

Improving the efficiency of solar-driven trigeneration systems using nanofluid coolants

Improving the efficiency of solar-driven trigeneration systems using nanofluid coolants

Graphene-Based Nanofluids: Production Parameter Effects on Thermophysical Properties and Dispersion Stability

Characterization of Al2O3, TiO2, hybrid Al2O3-TiO2 and graphene oxide nanofluids and their performance evaluations in photovoltaic thermal system

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