Influence of geometric parameters on the hydrodynamics control of solar chimney

Lebbi, Mohamed; Chergui, Toufik; Boualit, Hamid; Boutina, I.

doi:10.1016/j.ijhydene.2014.04.215

Cited by 19 publications

(11 citation statements)

References 25 publications

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“…This behavior can be caused by the boundary conditions imposed on the collector. A further comparison is made with the velocity distribution presented with the numerical results of Lebbi et al [17], as shown in Figure 4b. From these recent results, the obtained results correspond well with those in ref.…”

Section: Validation and Comparison With Anterior Resultsmentioning

confidence: 87%

“…They evaluated the solar radiation performance of unfavorable conditions at the SCPP and suggested a simple improvement to predict the maximum power. The hydrodynamic behavior of the flow in a solar chimney and the effect of the geometrical parameters on the SC were numerically studied by Lebbi et al [17]. The effect of the chimney radius on the thermal field indirectly throughout the system by using a change in the mean value of the temperature was examined.…”

Section: Introductionmentioning

confidence: 99%

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Parametric Study of the Airflow Structure in a Solar Chimney

Ghernaout¹,

Bouabdallah²,

Attia³

et al. 2020

IJHT

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Solar chimney converts solar thermal energy into kinetic energy to generate electricity and it is an alternative technology for electricity generation from solar energy. In this work, we are interested in the study of geometrical parameters on convection airflow within a solar chimney. For this, we have considered a two-dimensional prototype model of a solar chimney. The boundary conditions are chosen to be similar to those in reality. The considered mathematical model is a system of partial differential equations formed by the continuity, momentum, and energy equations in conjunction with the standard k-ε turbulence model. The numerical simulations were performed by a commercial Computational Fluid Dynamics (CFD) code based on the finite volume method. Good agreements of the present results with experimental and numerical data were obtained. The effects of the tower and collector radius/ heights on the aerodynamic structure were studied and examined. The obtained results can be used for the design of new solar chimney systems.

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Section: Validation and Comparison With Anterior Resultsmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Parametric Study of the Airflow Structure in a Solar Chimney

Ghernaout¹,

Bouabdallah²,

Attia³

et al. 2020

IJHT

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“…The collector inlet opening, the collector outlet diameter, the divergence angles, the chimney inlet opening were changed, while the collector diameter and chimney height were fixed. Lebbi et al [174] Analyzing an inclined roof-top solar chimney was an interesting work which was done by AlKayiem et al [175] by studying the effects of the collector dimensions and chimney height on the system. Gholamalizadeh and Kim [176] studied the greenhouse effect on the natural convection heat transfer characteristics in solar chimney.…”

Section: Analytical and Simulation Studiesmentioning

confidence: 99%

A review on solar chimney systems

Kasaeian

Molana

Rahmani

et al. 2017

Renewable and Sustainable Energy Reviews

143

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The increased utilization of solar energy has gained the attention of researchers to develop the solar chimney (SC) technology in recent years. Many studies have been conducted in this aear both experimentally and theoretically, whereas experimental studies are mainly focused on small-scale systems. This work provides a comprehensive and updated review that include most of the experimental studies, analytical and simulation works, the solar chimney applications, hybrid systems and geographical case studies based on extended references, citation of the updated works and the specified way of looking at different sections. The technological gaps in differnet sections are identified and a summary of suggestions is given for the future work, including more experimental works on the large-scale systems, and CFD analyses for optimization between the geometrical parameters and the output power. More studies on new applications of solar chimney technology including hybrid systems are also recommended.

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“…At the base of the chimney, beside the plate floor, there are outdoor air intake grids. The air coming from outside, due to an increase in temperature of the hot plate, will flow into the chimney and will travel upward [21].…”

Section: Description Of the Suggested Configurationmentioning

confidence: 99%

A First Approach to Natural Thermoventilation of Residential Buildings through Ventilation Chimneys Supplied by Solar Ponds

et al. 2015

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Abstract:The exploitation of natural ventilation is a good solution to improve buildings from an energetic point of view and to fulfill the requirements demanded by the thermohygrometric comfort and the air quality in enclosed spaces. Some past researches demonstrated how some devices, useful to this purpose, follow the principles of solar chimneys and are able to move air masses while exploiting the Archimedes thrust. The natural ventilation must be supplied by a flow moving upward, generated by a heat source performing at temperatures slightly higher than the one present in the environment. To have a minimum energetic effect, the heat can be extracted from solar ponds; solar ponds are able to collect and store solar energy in the geographical regions characterized by sufficient values of solar radiation. Thus it is possible, in summer, to provoke a nocturnal natural ventilation useful for the air change in indoor spaces (in those climatic areas where, during the night, there is a temperature gradient).

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Influence of geometric parameters on the hydrodynamics control of solar chimney

Cited by 19 publications

References 25 publications

Parametric Study of the Airflow Structure in a Solar Chimney

Parametric Study of the Airflow Structure in a Solar Chimney

A review on solar chimney systems

A First Approach to Natural Thermoventilation of Residential Buildings through Ventilation Chimneys Supplied by Solar Ponds

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