Performance analysis and particle swarm optimization of molten salt-based nanofluids in parabolic trough concentrators

Kaood, Amr; Abubakr, Mohamed; Al–Oran, Otabeh; Hassan, Muhammed A.

doi:10.1016/j.renene.2021.06.049

Cited by 41 publications

(8 citation statements)

References 46 publications

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“…In the realm of solar applications, the performance of the system is notably influenced by the absorber tubes, encompassing not only the geometry but also the heat transfer fluids circulating within them [1][2]. Recent interest has surged in harnessing molten salt-based nanofluids as heat transfer agents within absorbers [3] due to their remarkable heat transfer capabilities [4][5]. Experimental studies by Chen et al [3] and numerical investigations conducted by Ying et al [4] and Kaood et al [5] all consistently report a significant enhancement in thermal performance when utilizing molten salt-based nanofluids for convection within absorbers, as opposed to conventional pure molten salt.…”

Section: Introductionmentioning

confidence: 99%

Computational Fluid Dynamics Analysis of Absorber Tube with Molten Salt-based Nanofluids and Porous Medium Inserts

Ying,

Yang,

2024

Proceedings of the 9th World Congress on Momentum, Heat and Mass Transfer

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In the field of solar applications, the performance of the system is significantly influenced by the design of the absorber tube, including the composition of heat transfer fluids within it and its geometric configuration. This study presents a computational fluid dynamics (CFD) model that combines molten salt-based nanofluids with porous medium inserts within the absorber tube. Two distinct configurations of porous inserts are investigated: one attached to the tube wall, referred to as 'enhanced tube 1 (ET1),' and the other integrated into the core zone, denoted as 'enhanced tube 2 (ET2).' This research explores how the thickness of the porous medium in these two configurations impacts the thermal and hydraulic performance of the absorber tube when used with molten salt-based nanofluids. Parameters considered include flow and heat transfer characteristics, as well as a performance evaluation criterion. The thickness of the porous medium is found to play an essential role in the thermo-hydraulic performance of the receiver tube. Across all sizes of ET1, significantly better heat transfer performance is consistently observed when compared to all ET2 configurations. It is important to note that the introduction of porous inserts does result in an increase in pressure drop, which varies with the thickness of the inserts in both ET1 and ET2 configurations. Consequently, when evaluating the overall thermo-hydraulic performance, the ranking stands as ET1 > smooth tube > ET2. Additionally, the performance evaluation criterion of ET1 exhibits an initial increase, followed by a subsequent decrease as the thickness of the porous inserts varies. This pattern suggests the presence of an optimal thickness, with a radius of 0.1, that maximizes performance. This study might contribute to the performance improvement of the absorber tube used in solar applications.

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Section: Introductionmentioning

confidence: 99%

Computational Fluid Dynamics Analysis of Absorber Tube with Molten Salt-based Nanofluids and Porous Medium Inserts

Ying,

Yang,

2024

Proceedings of the 9th World Congress on Momentum, Heat and Mass Transfer

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“…After wind energy, solar energy is the most common source of energy in renewables. It has a wide variety of applications, making it one of the most promising energy sources 9–11 . According to the IEA (International Energy Agency), generating electricity by solar thermal energy has increased significantly over the past decades.…”

Section: Introductionmentioning

confidence: 99%

“…It has a wide variety of applications, making it one of the most promising energy sources. [9][10][11] According to the IEA (International Energy Agency), generating electricity by solar thermal energy has increased significantly over the past decades. Also, during this time, the number of concentrating solar power (CSP) plants has risen considerably.…”

mentioning

confidence: 99%

A comparison of using organic Rankine and Kalina cycles as bottom cycles in a solar‐powered steam Rankine cycle

Mirjavadi

Pourfayaz

Pourmoghadam

et al. 2022

Energy Science & Engineering

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This study has attempted to compare two thermodynamic cascade cycles, which in this paper are presented as Systems A and B. System A was consisted of a steam Rankine cycle (SRC) as a top cycle and an organic Rankine cycle (ORC) as a bottom cycle. System B was consisted of the same SRC as the top cycle and a Kalina cycle as the bottom cycle. The comparison of both systems has been made by changing a number of parameters. The chosen parameters for this comparison were bottom cycle mass flow rate, aperture area of the collector, top cycle condensing pressure, and bottom cycle turbine inlet and outlet pressures. Also, a short economic evaluation has been made between two proposed cascade cycles (Systems A and B). The result indicated that the Kalina cycle shows superiority over the ORC as the bottom cycle in a solardriven SRC. Furthermore, it was determined that the most effective parameters on the overall efficiency of the systems are the condensing pressure of the top cycle and the outlet pressure of the bottom cycle turbine. Also, among the chosen parameters, the outlet pressure of the bottom cycle turbine had the highest effect on the efficiency of the bottom cycles.Considering the economic aspect, the results showed that the levelized costs of energy for both systems are quite equal at 0.011 ($/kWh).

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“…According to the technique of order preference similarity to the ideal solution (TOPSIS) solution, the optimum efficiency and the highest power of TEG modules operating in a hybrid system were 0.078% and 1.97 W, respectively. Kaood et al 22 optimized the efficiency of parabolic trough collectors using heat transfers based on the molten salt nanofluid at high temperatures. The optimal values of exergy and energy efficiencies are 69% and 73.1%, respectively, achieved with copper oxide and Hitec nanofluid at concentration, Reynolds number, and temperature of 0.019%, 39912.98, and 535 K, respectively.…”

Section: Introductionmentioning

confidence: 99%

Multi‐objective assessment of a DAPTC based on 4E analysis: Water‐energy‐environment nexus

Saray

Heyhat

2022

Intl J of Energy Research

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Summary This study aims to thermodynamic analysis and optimizes the performance of a nanofluid‐based direct absorption parabolic trough collector (DAPTC) using a non‐dominated sorting genetic algorithm (NSGA‐II). For this purpose, silicon carbide (SiC) and copper oxide (CuO) at three different volume fractions (0.01%, 0.05%, and 0.1%) are used as the nanoparticles and water as the base fluid. The results obtained using the method presented in the current study are verified through experimental results, which are in good agreement with those. A comprehensive analysis is conducted to determine the effect of operating conditions and geometric dimensions on the energy and exergy efficiencies and economic performance of the DAPTC. In addition, an environmental investigation is performed to determine the effect of using nanofluids on CO2, NOx, and SOx reduction. Under the operating conditions, the cost of energy production, when SiC/water and CuO/water nanofluids are utilized instead of the base fluid, is reduced by 31.08% and 47.92%, respectively. The use of SiC/water and CuO/water nanofluids can reduce CO2 emissions by 216.18 and 332.55 kg and also water consumption by 968.1 and 1489.1 m3, respectively. The optimum energy and exergy efficiencies are 65.53% and 38.97%, respectively. Also, the SiC/water and CuO/water nanofluids have a 35% and 67.35% environmental impact, respectively. Highlights Multi‐objective optimization of a DAPTC using the NSGA‐II algorithm. The energy, exergy, economic, and environment of solar collectors were analyzed. The 547.86 MJ energy and 1489.1 m3 water were saved by the exploitation of CuO/water nanofluid. The 316.15 MJ energy and 968.1 m3 water were saved by the exploitation of SiC/water nanofluid. CO2 emissions decreased by 332.55 and 216.18 kg using CuO/water and SiC/water.

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Performance analysis and particle swarm optimization of molten salt-based nanofluids in parabolic trough concentrators

Cited by 41 publications

References 46 publications

Computational Fluid Dynamics Analysis of Absorber Tube with Molten Salt-based Nanofluids and Porous Medium Inserts

Computational Fluid Dynamics Analysis of Absorber Tube with Molten Salt-based Nanofluids and Porous Medium Inserts

A comparison of using organic Rankine and Kalina cycles as bottom cycles in a solar‐powered steam Rankine cycle

Multi‐objective assessment of a DAPTC based on 4E analysis: Water‐energy‐environment nexus

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