A computational and an experimental study on the effect of the chimney height on the thermal characteristics of a solar chimney power plant

Ayadi, Ahmed; Driss, Zied; Bouabidi, Abdallah; Nasraoui, Haythem; Bsisa, Moubarek; Abid, Mohamed Salah

doi:10.1177/0954408917719776

Cited by 24 publications

(16 citation statements)

References 28 publications

(43 reference statements)

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“…One of the chief benefits the solar ventilation is the reduction of the energy consumption by using renewable sources (renewable energy) [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Effect of the turbulence model on the heat ventilation analysis in a box prototype

Benguesmia¹,

Bakri²,

Driss³

et al. 2020

Diagnostyka

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Investigations of the flow in a building system are crucial for understanding the fundamental basis of the aerodynamic structure characteristics. The CFD simulations were conducted using ANSYS Fluent 17.0 software, which solves the Navier-Stokes equations in conjunction with different turbulence models and by a finite volume discretization method. Particularly, a comparison between the experimental and standard k-ω, BSL k-ω, SST k-ω, standard k-ɛ, RNG k-ɛ and Realizable k-ɛ turbulence model has been developed. The comparison between the founded results affirms that the standard k-ω turbulence model is the most efficient to model the air flow in the present application. Indeed, the numerical results compared using the experimental data developed in the LASEM laboratory confirms the validity of the numerical method. The good agreements validate the considered computational method.

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“…One of the chief benefits the solar ventilation is the reduction of the energy consumption by using renewable sources (renewable energy) [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Effect of the turbulence model on the heat ventilation analysis in a box prototype

Benguesmia¹,

Bakri²,

Driss³

et al. 2020

Diagnostyka

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“…In their study, authors established a mathematical model of the inclined collector roof. Ayadi et al stated experimental and numerical investigation to present the consequence of varying the chimney height on the performance of an existing SCPP. Researchers discussed the characteristics of the air flow characteristics of temperature, velocity, pressure, and turbulence.…”

Section: Introductionmentioning

confidence: 99%

Experimental and computational analysis of the collector geometry of a solar chimney

Ayadi

Driss

Abid

2019

Env Prog and Sustain Energy

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The solar chimney power plants (SCPP) are thermodynamic devices that transform the heat produced by the solar radiation into electricity. A SCPP make significant contributions to the energy generating in countries where sunlight is available. The optimization of the solar setups is essential to enhance their economic profitability. In this article, a numerical method is investigated by the use of the commercial CFD code Ansys Fluent to analyze the airflow within the solar chimney. Different considered cases have been studied. Indeed, a new design of the SCPP is presented and compared with a conventional solar chimney power plant (CSCPP). The proposed design is characterized by a convergent collector output. For each case, the local flow characteristics were presented and discussed. This technical solution favorite the generated power of CSCPP. This article is identified important to increase the generated power for an existing SCPP.

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“…The system is characterized by a chimney height equal to 9 m, chimney diameter equal to 0.31 m, and a collector with an approximate area of 12.5 m 2 . Ayadi et al developed a prototype of a solar chimney at the National School of Engineers of Sfax (ENIS). Ayadi et al compared a convergent collector roof, a divergent collector roof, and a conventional collector roof of a solar chimney power plant.…”

Section: Introductionmentioning

confidence: 99%

“…In their work, the collector roof angle was varied and the air characteristics within the setup were presented for each case. In another work, Ayadi et al presented a computational and an experimental study on the effect of the chimney height on the thermal characteristics of a solar chimney power plant. As a result, they noted that the increase of the chimney height causes the increase in the generated power.…”

Section: Introductionmentioning

confidence: 99%

The impact of placing obstacles on the distribution of the airflow inside a solar chimney

Ayadi

Driss

Abid

2019

Env Prog and Sustain Energy

Self Cite

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Solar energy sources are alternative solutions to creating energy by the use of solar radiation. The solar chimney power plants (SCPPs) are non-concentrated thermal systems that use the solar radiation to produce green energy. The main components of an SCPP are a collector, an absorber, a chimney, and a turbine that is coupled with a generator. The feasibility study of these thermal devices is required. In this paper, a study of a solar chimney power plant is reported. In fact, a numerical investigation of the obstacle effect on the distributions of the airflow in a solar chimney is presented using the commercial CFD code Ansys Fluent. The comparison between numerical and experimental findings has shown good agreement for the considered instance. Accordingly, the presented numerical model is capable of estimating the airflow characteristics inside the solar device. Results showed that the placement of obstacles at the collector output favors the performance of an existing solar chimney. The generated power could be enhanced by 11.5% using one obstacle and 14.75% using two obstacles.

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A computational and an experimental study on the effect of the chimney height on the thermal characteristics of a solar chimney power plant

Cited by 24 publications

References 28 publications

Effect of the turbulence model on the heat ventilation analysis in a box prototype

Effect of the turbulence model on the heat ventilation analysis in a box prototype

Experimental and computational analysis of the collector geometry of a solar chimney

The impact of placing obstacles on the distribution of the airflow inside a solar chimney

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