Performance assessment of solar chimney power plants with the impacts of divergent and convergent chimney geometry

Cüce, Erdem; Saxena, Abhishek; Cuce, Pınar Mert; Sen, Harun; Guo, Shu-Guang; Sudhakar, K.

doi:10.1093/ijlct/ctaa097

Cited by 27 publications

(24 citation statements)

References 19 publications

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“…When the ground slope is 0.1°, the pressure difference across the turbine increases by 8.52% compared to the reference case (8) The increase in power output continues to decrease after 0.1°. The increase in power output falls below 1% after the ground inclination angle of 0.4°( 9) In further works, sloping ground design in SCPPs will be studied along with the divergent chimney geometry [33] for extra improvement in performance figures…”

Section: Discussionmentioning

confidence: 99%

Impacts of Ground Slope on Main Performance Figures of Solar Chimney Power Plants: A Comprehensive CFD Research with Experimental Validation

Cüce

Cuce

Sen

et al. 2021

International Journal of Photoenergy

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Geometric parameters in solar chimney power plants are numerically optimised for the purpose of better power output figures. Several parameters have been investigated in the pilot plant such as chimney height and diameter, collector diameter and slope, and slenderness. However, ground slope has not been studied to date despite its perspicuous impact on turbulent flow. In this study, the impacts of the different slope angles of the ground, where the solar radiation is absorbed through the collector, on the main performance parameters of the system are numerically analysed through a reliable CFD software ANSYS FLUENT. By considering the actual geometric figures of the pilot plant, a 3D model is constructed through DO (discrete ordinates) solar ray tracing algorithm and RNG k-ε turbulence model. For the solar intensity of 1000 W/m2, the maximum velocity inside the system is found to be 14.2 m/s, which is in good accordance with the experimental data of 15.0 m/s. Starting from 5 m inside the collector, the chimney inlet heights are reconfigured 0.209, 0.419, 0.625, 0.838, and 1.04 m, respectively, and when the ground slope is 0.1, 0.2, 0.3, 0.4, and 0.5°, the changes in the performance output of the system are investigated. For the reference case which refers to the horizontal ground, the maximum air velocity is determined to be 14.2 m/s and the power output is 54.3 kW. However, when the ground slope is made 0.5°, it is observed that the maximum velocity increases by 37% to 19.51 m/s, and the power output is enhanced to 63.95 kW with a rise of 17.7%. Sloping ground is found a key solution to improve the turbulent effects inside the plant, thus to enhance the electrical power output.

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Section: Discussionmentioning

confidence: 99%

Impacts of Ground Slope on Main Performance Figures of Solar Chimney Power Plants: A Comprehensive CFD Research with Experimental Validation

Cüce

Cuce

Sen

et al. 2021

International Journal of Photoenergy

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“…[ [19][20][21] Divergent chimney design increases the performance of the system, so much so that the power output for the pilot plant can exceed two times with the ideal divergence angle.…”

Section: -19]mentioning

confidence: 99%

Collector factor in a solar chimney power plant: CFD analysis for the pilot plant in Manzanares

Cüce¹,

Sen²,

Cuce³

2023

energetika

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Solar chimneys are popular systems for their simple structures and clean energy generation. Thanks to its semi-permeable structure, the collector, one of the system’s basic elements, transfers solar radiation to the system. As a result of the heating of the system air under the collector by the solar radiation passing through the collector, it is directed to the high chimney in the collector centre. During the upward movement of the system air, it converts its energy into electricity via a turbine. Due to its large structure, estimating the amount of energy entering the collector system creates a great cost. The ideal size for the collector is therefore important. This study offers a recommendation for the ideal collector size for the pilot plant in Manzanares in terms of collector size and power output. While 59 kW power output is obtained with the system with a collector radius of 122 m in the reference case, it is observed that the power output increases by 78% when the collector radius is increased to 170 m and the collector area is doubled. The ratio of the ideal collector radius to the reference size for the pilot plant should be in the range of 1–1.5.

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“…In Reference [26], the authors presented the solar chimney power plants-dimension matching for optimum performance. Cuce et al studied the performance assessment of solar chimney power plants with the impacts of divergent and convergent chimney geometry [27].…”

Section: Introductionmentioning

confidence: 99%

Modeling the Thermal Performance for Different Types of Solar Chimney Power Plants

2022

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Nowadays, due to restrictions on fossil fuels, the use of renewable energies is increasing day by day. Among renewable energies, solar energy has received more attraction due to its availability in all places. Among solar energy technologies, the solar tower has been welcomed due to its high power generation of electrical energy. For accurate modeling of the studied system, each component of the system has been evaluated and modeling has been done. Therefore, in this research, solar tower modeling has been conducted to achieve high electrical energy production, and to better compare the production rate, 5 cities in Iran with different weather conditions have been considered. According to the results, it can be mentioned that the highest production power by the studied system is related to Shiraz city with an average production of 20 kW/m2, and among the cities studied, the lowest rate is related to Mashhad with a production power of 15 kW/m2.

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Performance assessment of solar chimney power plants with the impacts of divergent and convergent chimney geometry

Cited by 27 publications

References 19 publications

Impacts of Ground Slope on Main Performance Figures of Solar Chimney Power Plants: A Comprehensive CFD Research with Experimental Validation

Impacts of Ground Slope on Main Performance Figures of Solar Chimney Power Plants: A Comprehensive CFD Research with Experimental Validation

Collector factor in a solar chimney power plant: CFD analysis for the pilot plant in Manzanares

Modeling the Thermal Performance for Different Types of Solar Chimney Power Plants

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