Comparative studies on performance of solar towers with variable scale ratios

Rajamurugu, N.; Jayaraman, V; Sathyamurthy, Ravishankar

doi:10.1007/s11356-022-19079-0

Cited by 4 publications

(4 citation statements)

References 10 publications

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“…Additionally, the velocity profile was plotted for the location of the turbine blade section and the maximum velocity was found to be near the wall. The simulation results of case-3 are compared with the experimental work (11) by plotting the dimensionless velocity (v/V max ) against the dimensionless chimney radius (r/Ro) in Figure 7. (11) The comparison is found to be similar with the experimental results.…”

Section: Resultsmentioning

confidence: 99%

“…The simulation results of case-3 are compared with the experimental work (11) by plotting the dimensionless velocity (v/V max ) against the dimensionless chimney radius (r/Ro) in Figure 7. (11) The comparison is found to be similar with the experimental results. The Figure 8 shows the variation of air velocity at different (r/Ro) of a chimney.…”

Section: Resultsmentioning

confidence: 99%

“…Results indicate that a tower inclination of up to 22 • enhances SCPP performance and improves energy utilization with reduced entropy generation. Additionally, the chimney's divergence angle has been found to affect power output, with a divergence angle of 2 degrees yielding optimal results (11) . However, further investigation is required to determine the optimal chimney shape and divergence angle for enhanced performance.…”

Section: Introductionmentioning

confidence: 99%

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Computational Investigation of Under Expanded Solar Chimney Power Plant

Akhil,

Natarajan,

Yaknesh

2023

IJST

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Objectives:To study the effect of the Area Ratio of the chimney and collector on the driving potential of a Solar Chimney Power Plant (SCPP) using computational studies. Methods: The chimney whose area ratio (AR) is greater than unity is tested for three different collector shapes. The underexpanded chimneys are subjected to different collector configurations namely fully slopped, and sloped at midway. The computational analyses are carried out in ANSYS-FLUENT R2021. The temperature, velocity, and static pressure are compared with the Manzarnes prototype properties and found that the fully sloped collector is behaving best in comparison with the other two configurations. Then, a vertical Convergent Divergent (C-D) chimney with a fully sloped collector was investigated in at open environment in real-time conditions. Thermocouple, Anemometer is used to measure the temperature and anemometer respectively. Findings: The average temperature rise inside the SCPP is found to be 10K in the simulation studies using ANSYS-FLUENT. Sloped at midway collector configuration (case-2) achieved a peak velocity of 1.4m/s which is 12% superior to the fully slopped configuration (case-1). The case-1 outperformed the manzarnes plant by 23%. The Convergent Divergent (C-D) chimney with a fully sloped collector (case-3) behaves poorly which is inferior by 23%, and 12% to case-1 and case-2 respectively. Novelty: The novelty of this work lies in the comparison and simulation of three different configurations of the SCPP. This study is useful to society as it provides valuable insights into the design and optimization of solar power plants. The findings of this study can be used by engineers and energy experts to improve the efficiency of solar power plants, reduce the cost of energy production, and contribute to the global effort toward sustainable energy sources. The study also highlights the importance of considering different configurations and design elements in the optimization of solar power plants.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Computational Investigation of Under Expanded Solar Chimney Power Plant

Akhil,

Natarajan,

Yaknesh

2023

IJST

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“…Solar thermal technology captures sunlight, converts it into thermal energy, and generates electricity. Among solar thermal power systems, Solar Power Tower (SPT) systems excel in concentration ratio and operating temperature, enhancing efficiency [4][5][6]. However, SPT systems must address durability and efficiency challenges to compete effectively in energy production [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Real-Time Optimization of Heliostat Field Aiming Strategy via an Improved Swarm Intelligence Algorithm

Wang,

Wu,

2024

Applied Sciences

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Optimizing the heliostat field aiming strategy is crucial for maximizing thermal power production in solar power tower (SPT) plants while adhering to operational constraints. Although existing approaches can yield highly optimal solutions, their considerable computational cost makes them unsuitable for real-time optimization in large-scale scenes. This study introduces an efficient, intelligent, real-time optimization method based on a meta-heuristic algorithm to effectively and reliably manage SPT plant operations under varying solar conditions, such as cloud shadowing variations. To minimize redundant calculations, the real-time optimization problem is framed in a way that captures the operational continuity of the heliostat, which can be utilized to streamline the solution process. The proposed method is tested in a simulation environment that includes a heliostat field, cylindrical receiver, and cloud movement model. The results demonstrate that the algorithm presented in this paper offers higher intercept efficiency, improved robustness, and reduced optimization time in more complex scenes.

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Triple-renewable energy system for electricity production and water desalination

Abdelsalam

Almomani

Alnawafah

et al. 2022

Environ Sci Pollut Res

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This work presents a novel triple-renewable energy system (TRES) that is based on integrating the photovoltaic panels (PVPs), conventional solar chimney (CSC), and cooling tower (CT) in one structure. The ultimate objective of the proposed TRES system is to produce electrical power (Pelc), desalinated water (Dw), and if required cooling utilities. The components of the system include a chimney tower, collector, base, PVPs, water pool, bi-directional turbine, and water sprinklers. The TRES system can be operated as CSC during the daytime and CT at night providing 24-h operation. The PVPs were integrated within the structure to increase the Pelc production and enhance the process performance by heating the air inside the system. The TRES structure increased the efficiency to 0.860% in comparison with the CSC (0.313%). The annual Pelc production from the TRES system was found to be 792 MWh compared with only 380 MWh generated by the CSC achieving 2.1 folds overall improvement. The CSC-PV and CT contributed to 47% (494 MWh) and 24% (253 MWh) of the Pelc production, respectively. The annual Dw production was found to be 1.2-fold higher (163,142 tons) higher than the CSC (139,443 tons). The newly developed TRES system offers a great potential to produce Pelc and Dw and save fossil fuel consumption while reducing the emissions of greenhouse gasses (GHGs) to the atmosphere.

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Comparative studies on performance of solar towers with variable scale ratios

Cited by 4 publications

References 10 publications

Computational Investigation of Under Expanded Solar Chimney Power Plant

Computational Investigation of Under Expanded Solar Chimney Power Plant

Real-Time Optimization of Heliostat Field Aiming Strategy via an Improved Swarm Intelligence Algorithm

Triple-renewable energy system for electricity production and water desalination

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