Effect of thermal energy storage layer porosity on performance of solar chimney power plant considering turbine pressure drop

Sedighi, Ali Asghar; Deldoost, Zeynab; Karambasti, Bahram Mahjoob

doi:10.1016/j.energy.2019.116859

Cited by 31 publications

(12 citation statements)

References 30 publications

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“…The dispersion of pollutant is obtained in this study by solving the following governing equations of mass, momentum, energy, species transport and realizable k-ε [23][24][25].…”

Section: Mathematical Formulationmentioning

confidence: 99%

Desirable effects of cutting grooves on inner side of small cooling tower on reduction in ground level pollutant concentration

Sedighi

Deldoost

Bazargan

2020

J Braz. Soc. Mech. Sci. Eng.

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The pollutant dispersion from a small cooling tower is numerically investigated in the current study. The behavior of exhaust plume from a grooved cooling tower is studied to control the dispersion of pollutant by swirling the plume. The pollutant concentration, i.e., mass of pollutant per unit mass of the mixture, and the plume rise, i.e., the geometric loci of the highest pollutant concentration points at each flow cross sections downstream of cooling tower, are investigated as significant parameters in the problem of pollutant dispersion from sources of air pollution. The various ways by which the counterrotating vortex pair as well as swirling plume affect the behavior of outflow from source of air pollution are investigated. An innovative structure for inner side of cooling tower by cutting the angular grooves is proposed in this article for reduction in pollutant concentration on the ground level and moving the plume rise to the higher altitude. The results indicate that the minimum value of pollutant concentration on the ground level is obtained by applying parallel grooves with respect to the axis of the cooling tower and the plume rise occurs in a higher altitude by increasing in the angle of the grooves. The physics of the outflow from the tower is investigated to examine the effects of the grooves angle on the path of plume and dispersion of pollutant.

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“…The dispersion of pollutant is obtained in this study by solving the following governing equations of mass, momentum, energy, species transport and realizable k-ε [23][24][25].…”

Section: Mathematical Formulationmentioning

confidence: 99%

Desirable effects of cutting grooves on inner side of small cooling tower on reduction in ground level pollutant concentration

Sedighi

Deldoost

Bazargan

2020

J Braz. Soc. Mech. Sci. Eng.

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“…They investigated its impact on the performance of SCPP in the region of Semnan, Iran. Sedighi et al [21] investigated the effects of soil porosity on the output power and energy efficiency of SCPP. They found that land with less porosity and a location with high radiation is the most suitable place for the construction of solar chimney power plant.…”

Section: Introductionmentioning

confidence: 99%

Influence of environment and aging materials on the performance of solar chimney power plants

Boualleg

Larbi

Bouhdjar

et al. 2021

Renew. Energy Environ. Sustain.

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The simplicity of solar chimney power plant (SCPP) makes it very attractive for power generation. This paper investigates the technical feasibility of using a locally-produced plastic film (Low-Density Poly-Ethylene “LDPE”) as a solar chimney power plant collector cover. The idea is to combine a very low-cost material with a simple technical solution. As LDPE is subject to deterioration, the effect of aging on the initial properties of the used material is analyzed. Natural aging was privileged over the accelerated one by exposing the studied film, for a time duration of 3 years, to environmental constraints similar to the local conditions where the SCPP collectors are installed. Various experimental tests were carried out to show the decrease of mechanical resistance and to confirm the structural degradation. Results showed that after an exposure time of 3 years, a decrease of more than 50% of the failure stress is recorded. The spectroscopic analysis confirmed the progressive degradation of the structure of the aged films. Pyranometric measurements showed that the transmittance of the film proportionally decreases with the duration of aging which has a direct impact on the SCPP collector performance. A mathematical model is developed and validated to simulate the performance of the SCPP. An increase in the initial dimension of the collector by about 23% is necessary to maintain the design-targeted production during an exploitation period of three years. The study concluded that this type of film can be used in SCPP collectors for a maximum life cycle of 3 years under the considered environmental conditions.

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“…Moreover, it is also showed that the optimal slope would depending on the sloping distance under a different Rayleigh numbers examined. Ali Asghar et al, [8] presented a numerical study of the solar chimney power plant under the influent of the solar intensity, pressure drop of turbine and the soil porosity. The system could construct on the soil surface with a several specifications and porosities, for using as a layer of energy storage.…”

Section: Introductionmentioning

confidence: 99%

Natural Ventilation in Passive System of Vertical Two-Stores Solar Chimney

Mohammed¹,

Jubear²,

Obaid³

2020

ARFMTS

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The present work includes a numerical study that investigated in a thermal performance of the passive system of a vertical two stores solar chimney. A several models of a vertical solar chimneys were designed, by using the solid work 18 software, that then brought to the Ansys Fluent 18.2 software for simulation, under (Al-Kut, Iraq) city climatic conditions on the hot summer day of (5-8-2018). This simulation was comprised of a five testing models of a two stores solar chimney that oriented to the south and equipped with a wooden two stores facility building that having the size of (1 * 1 * 1) m 3 for each store. The testing models includes a vertical and long vertical solar chimney, with two different positions of (lower and upper) inlet holes. The testing was aimed to choosing the perfect model that could giving a suitable thermal performance under a various value of solar intensities and ambient temperatures during a constant interval of the daylight times. The results proved that the long vertical solar chimney was able to providing a best natural ventilation but with visible rising into the indoor temperatures.

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Effect of thermal energy storage layer porosity on performance of solar chimney power plant considering turbine pressure drop

Cited by 31 publications

References 30 publications

Desirable effects of cutting grooves on inner side of small cooling tower on reduction in ground level pollutant concentration

Desirable effects of cutting grooves on inner side of small cooling tower on reduction in ground level pollutant concentration

Influence of environment and aging materials on the performance of solar chimney power plants

Natural Ventilation in Passive System of Vertical Two-Stores Solar Chimney

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