scholarly journals Flow Through a Solar Chimney Power Plant Collector-to-Chimney Transition Section

2006 ◽  
Vol 128 (3) ◽  
pp. 312-317 ◽  
Author(s):  
Carl F. Kirstein ◽  
Theodor W. von Backström
Keyword(s):  
Power Plant ◽  
Power Plants ◽  
Guide Vane ◽  
Full Scale ◽  
Loss Coefficient ◽  
Inlet Guide Vane ◽  
Empirical Equations ◽  
Solar Chimney ◽  
Transition Section ◽  
Solar Chimney Power Plant

A solar chimney power plant consists of a large greenhouse-type collector surrounding a tall chimney. The air, heated within the collector, passes through an inlet guide vane (IGV)cascade and then through a transition section to a turbine that powers a generator. The transition section contains the turbine inlet guide vanes that support the whole chimney and guides the flow entering the turbine. The primary objective of the study was to determine the loss coefficient and mean exit swirl angle of the flow passing through the collector-to-chimney transition section of a full-scale solar chimney power plant as dependent on IGV stagger angle and collector roof height. Very good agreement was found between experimental values measured in a scaled model and commercial CFD code predictions of flow angles, velocity components, and internal and wall static pressures. The agreement between measured and predicted total pressure loss coefficient was reasonable when considering how small it is. The CFD code served to extend the predictions to a proposed full-scale geometry. Semi-empirical equations were developed to predict the loss coefficient and turbine mean inlet flow angles of solar chimney power plants as dependent on collector deck height and inlet guide vane setting angle. The two empirical equations may be useful in solar chimney plant optimization studies.

scholarly journals Flow Through a Solar Chimney Power Plant Collector-to-Chimney Transition Section

Solar Energy ◽  
2005 ◽  
Author(s):  
Carl F. Kirstein ◽  
Theodor W. von Backstro¨m ◽  
Detlev G. Kro¨ger
Keyword(s):  
Power Plant ◽  
Guide Vane ◽  
Primary Objective ◽  
Loss Coefficient ◽  
Inlet Guide Vane ◽  
Solar Chimney ◽  
Scaled Model ◽  
Transition Section ◽  
Pressure Loss Coefficient ◽  
Solar Chimney Power Plant

A solar chimney power plant consists of a large greenhouse type collector surrounding a tall chimney. The air, heated within the collector, passes through an inlet guide vane (IGV) cascade and then through a transition section to a turbine that powers a generator. The transition section contains the turbine inlet guide vanes that support the whole chimney and guides the flow entering the turbine. The primary objective of the study was to determine the loss coefficient of this section as dependent on IGV stagger angle and collector roof height. Very good agreement was found between experimental values measured in a scaled model and commercial CFD code predictions of flow angles, velocity components and internal and wall static pressures. The agreement between measured and predicted total pressure loss coefficient was reasonable. The CFD code served to extend the predictions to a proposed full-scale geometry.

Effect of the number of turbine blades on the air flow within a solar chimney power plant

2017 ◽  
Vol 232 (4) ◽  
pp. 425-436 ◽  
Author(s):  
Ahmed Ayadi ◽  
Zied Driss ◽  
Abdallah Bouabidi ◽  
Mohamed Salah Abid
Keyword(s):  
Power Plant ◽  
Kinetic Energy ◽  
Power Plants ◽  
Turbulent Viscosity ◽  
Air Flow ◽  
Turbine Blades ◽  
Electrical Power ◽  
Thermal Characteristics ◽  
Solar Chimney ◽  
Solar Chimney Power Plant

Solar chimney power plants generate thermal heat and electrical power using the radiation from sun. These systems are characterized by their high costs. In fact, it is required to optimize the components of the solar system such as the collector, the chimney, the absorber, and the turbine. This paper focuses on the effect of the number of turbine blades on the air flow within a small prototype of a solar chimney power plant. Four configurations with different turbine blades are proposed to study the effect of the turbine blades number on the thermal characteristics of a solar chimney power plant. For each configuration, the distribution of the magnitude velocity, the air temperature, the pressure, the turbulent kinetic energy, and the turbulent viscosity are presented and discussed. This paper is identified to be of interest for engineers and designers for increasing the power output of a solar chimney power plant.

Solar Chimney Power Plant Performance Analysis in the Central Regions of Iran

2012 ◽  
Vol 135 (1) ◽  
Author(s):  
A. Asnaghi ◽  
S. M. Ladjevardi ◽  
A. Haghparast Kashani ◽  
P. Saleh Izadkhast
Keyword(s):  
Power Plant ◽  
Performance Analysis ◽  
Solar Radiation ◽  
Power Plants ◽  
Plant Performance ◽  
Solar Chimney ◽  
Electrical Grid ◽  
Central Regions ◽  
Solar Chimney Power Plant ◽  
A Site

In the current study, the performance analysis of a solar chimney power plant expected to provide off-grid electric power demand for villages located in Iranian central regions is presented. High annual average of solar radiation and available desert lands in the central parts of Iran are factors to encourage the full development of a solar chimney power plant for the thermal and electrical production of energy for various uses. The interested is in Kerman where solar radiation is much better than other areas of Iran. The obtained results clear that solar chimney power plants having 244 m diameter can produce from 25.3 to 43.2 MW h of electricity power on a site like Kerman during different months of a year, according to an estimation calculated from the monthly average of sunning. This power production is sufficient for the needs of the isolated areas and can even used to feed the main electrical grid.

Influence of Inlet Guide Vane Control on Combined Cycle Power Plant Transients

2002 ◽  
Author(s):  
Zygfryd Domachovski ◽  
Merek Dzida
Keyword(s):  
Power Plant ◽  
Gas Turbine ◽  
Power Plants ◽  
Position Control ◽  
Guide Vane ◽  
Combined Cycle ◽  
Inlet Guide Vane ◽  
Combined Cycle Power Plant ◽  
Exhaust Temperature ◽  
Turbine Efficiency

The gas turbine efficiency drops quickly at part load as it is very dependant on turbine firing temperature. Therefore in combined cycle power plants the inlet guide vane is adjusted to maintain the high combustion chamber exhaust temperature. Simulations on influence of the inlet guide vane position control on combined cycle power plant transients have been carried out.

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

2021 ◽  
Vol 6 ◽  
pp. 11
Author(s):  
Salim Mekki Boualleg ◽  
Salah Larbi ◽  
Amor Bouhdjar ◽  
Dalila Amokrane ◽  
Abdallah Sofiane Berrouk
Keyword(s):  
Power Plant ◽  
Power Plants ◽  
Low Cost ◽  
Natural Aging ◽  
Mechanical Resistance ◽  
Technical Solution ◽  
Solar Chimney ◽  
Time Duration ◽  
Local Conditions ◽  
Solar Chimney Power Plant

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.

Effect of the turbine diameter on the generated power of a solar chimney power plant

2018 ◽  
Vol 29 (5) ◽  
pp. 822-836 ◽  
Author(s):  
Ahmed Ayadi ◽  
Zied Driss ◽  
Abdallah Bouabidi ◽  
Mohamed S Abid
Keyword(s):  
Power Plant ◽  
Solar Radiation ◽  
Air Temperature ◽  
Power Plants ◽  
Thermal Study ◽  
Technical Solution ◽  
Solar Chimney ◽  
Solar Chimney Power Plant

The solar chimney power plants produce electricity and thermal heat using the solar radiation. The thermal study of the solar chimney power plants is required since these systems are characterized by their high costs. This paper focuses on the study of a solar chimney power plant coupled with a turbine to increase the generated power. Thus, four turbine diameters are proposed. For each configuration, the distribution of the magnitude velocity, the air temperature, and the pressure was discussed. The results indicate that the generated power increases with the increase of the turbine diameter. This technical solution is identified interesting for designers to increase the generated power.

scholarly journals Numerical Simulation and Comparison of Conventional and Sloped Solar Chimney Power Plants: The Case for Lanzhou

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Fei Cao ◽  
Huashan Li ◽  
Yang Zhang ◽  
Liang Zhao
Keyword(s):  
Fluid Dynamics ◽  
Numerical Simulation ◽  
Power Plant ◽  
Power Plants ◽  
Effective Pressure ◽  
Cfd Model ◽  
Solar Chimney ◽  
Computational Fluid Dynamics Cfd ◽  
Solar Chimney Power Plant

The solar chimney power plant (SCPP) generates updraft wind through the green house effect. In this paper, the performances of two SCPP styles, that is, the conventional solar chimney power plant (CSCPP) and the sloped solar chimney power plant (SSCPP), are compared through a numerical simulation. A simplified Computational Fluid Dynamics (CFD) model is built to predict the performances of the SCPP. The model is validated through a comparison with the reported results from the Manzanares prototype. The annual performances of the CSCPP and the SSCPP are compared by taking Lanzhou as a case study. Numerical results indicate that the SSCPP holds a higher efficiency and generates smoother power than those of the CSCPP, and the effective pressure in the SSCPP is relevant to both the chimney and the collector heights.

Performance analysis of a solar chimney power plant system in two Algeria regions

2021 ◽  
pp. 1-26
Author(s):  
Sellami Ali ◽  
Benlahcene Djaouida ◽  
Abdelmoumène Hakim Benmachiche ◽  
Zeroual Aouachria
Keyword(s):  
Power Plant ◽  
Performance Analysis ◽  
Solar Chimney ◽  
Plant System ◽  
Solar Chimney Power Plant
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