CFD analysis on flow and performance parameters estimation of solar updraft tower (SUT) plant varying its geometrical configurations

Das, Pritam; Chandramohan, V.P.

doi:10.1080/15567036.2018.1477881

Cited by 31 publications

(14 citation statements)

References 29 publications

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“…One is the treatment of the incident solar irradiance. Treating the incident solar energy as an internal heat source inside the soil layer, 27,28 a uniform heat source within the airflow, 29 and heat flux on the ground surface 3,10 might be simple but conceptually incorrect according to the heat transfer scheme in the SCPP. The solar ray tracing (SRT) algorithm provided by Fluent is adopted to simulate the input energy due to the solar radiation in the present work.…”

Section: Methodsmentioning

confidence: 99%

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Numerical investigation and multi‐objective thermo‐economic optimization of a solar chimney power plant

et al. 2021

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Summary This study was conducted to optimize a solar chimney power plant from the aspects of performance improvement and cost saving. Numerical simulation was performed for a Spanish prototype to investigate the parametric sensitivity of several key variables and identify a reasonable range for the variables as the constraints of the optimization. A multi‐objective optimization on the prototype was conducted using orthogonal design of experiments, response surface methodology, and the non‐dominated sorting genetic algorithm. The optimum chimney diameter tends to reach the upper bound of 30 m, while the optimum collector radius is almost uniformly distributed over the allowable range. The optimum range of the turbine pressure drop ratio is between 0.82 and 0.88 for the cases with a 200‐m high chimney. The optimized capital cost per unit power production ranges from 0.018 to 0.026 M€/kW, which is much less than 0.054 M€/kW of the Spanish prototype. Considering the output power and construction cost comprehensively, the Pareto solution set obtained from the optimization may provide a guide to the system design and operation.

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Section: Methodsmentioning

confidence: 99%

“…Since the construction of the Spanish prototype, many studies have focused on the influence of geometry on the SCPP performance 7‐11 . The ideal thermodynamic power cycle in the SCPP is the Brayton cycle 12,13 .…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation and multi‐objective thermo‐economic optimization of a solar chimney power plant

et al. 2021

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“…Das and Chandramohan [17] developed a three-dimensional numerical model for a solar chimney station to estimate and evaluate flow and efficiency parameters. They studied the effects of geometric variables such as the chimney height and the solar collector roof angle.…”

Section: Introductionmentioning

confidence: 99%

CFD Simulation of a 3D Solar Chimney Integrated with an Axial Turbine for Power Generation

et al. 2021

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The solar chimney is one of the uninvestigated areas in the possible selection in the field of renewable solar energy utilization. CFD can be demonstrated as a useful tool of figure confidence in the design and employment of a solar chimney. A realistic numerical model for a solar-based updraft power plant for power generation was established through this research work. Iraqi weather in Kirkuk, northern Iraq was considered for this case study. A three-dimensional (3D) simulation of the main geometric dimensions of the Spanish, Manzanares model integrated with a real turbine was performed using computational fluid dynamics (CFD). The turbulent model of RNG k-e, the nongrey discrete coordinate (DO) radiation model, and the solar raytracing algorithm were used. It was observed that the air velocity below the turbine was graded according to the seasons of the year and was at its maximum in July with 18.28 m/s due to the high ambient temperature, and the lowest value was recorded in January with 8.64 m/s. The overall average daily and monthly energy production values for the Kirkuk system were higher than those of the Kubang system, with values of 310 kWh/day and 9314 kWh/month, respectively, for the Kirkuk system, and 246 kWh/day and 7398 kWh/month, respectively, for the Kubang system. The simulation results showed that the electricity generation from the Kirkuk city power plant varied seasonally to be at its maximum value of 14,424 kWh/month in July. This research work will help to determine the possibility of producing electricity in this Kirkuk city, which would then contribute in a great way to reduce the cash spent on electricity.

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“…Five design parameters (collector radius, collector inlet height, collector outlet height, chimney height and diameter) that affect system performance were simultaneously optimized for the system efficiency, power output and system expenditure [14]. Numerical investigations on canopy slopes and chimney geometries (heights and angles) have been conducted [15][16][17]. Five canopy shapes including new geometries (segmented and stepped profile) were studied to confirm the aerodynamic performance of each design [18].…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation on the Effects of Baffles with Various Thermal and Geometrical Conditions on Thermo-Fluid Dynamics and Kinetic Power of a Solar Updraft Tower

2018

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Solar updraft towers (SUTs) are used for renewable power generation, taking advantage of the thermal updraft air flow caused by solar energy. Aerodynamic devices have been applied to SUTs to improve their performance and the baffle is one such device. Here, we investigate the effect of baffle installation on the thermo-fluid dynamic phenomena in the collector of an SUT and how it enhances the overall SUT performance using computational fluid dynamics analysis. Two geometric parameters (height and width of baffle) and two thermal boundary conditions of the baffle (adiabatic condition and heat flux condition) were tested through simulations with 10 different models. The vortex generated by the baffle has a positive effect on the delivery of heat energy from the ground to the main flow; however, one disadvantage is that the baffle inherently increases the resistance of the main flow. Over 3% higher kinetic power was achieved with some of the simulated baffle models. Therefore, an optimum design for baffle installation can be achieved by considering the positive and negative thermo-fluid dynamics of baffles.

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CFD analysis on flow and performance parameters estimation of solar updraft tower (SUT) plant varying its geometrical configurations

Cited by 31 publications

References 29 publications

Numerical investigation and multi‐objective thermo‐economic optimization of a solar chimney power plant

Numerical investigation and multi‐objective thermo‐economic optimization of a solar chimney power plant

CFD Simulation of a 3D Solar Chimney Integrated with an Axial Turbine for Power Generation

Numerical Investigation on the Effects of Baffles with Various Thermal and Geometrical Conditions on Thermo-Fluid Dynamics and Kinetic Power of a Solar Updraft Tower

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