Solar Chimney Cycle Analysis With System Loss and Solar Collector Performance

2000 ◽  
Vol 122 (3) ◽  
pp. 133-137 ◽  
Author(s):  
Anthony J. Gannon ◽  
Theodor W. von Backstro¨m
Keyword(s):  
Experimental Data ◽  
Simple Model ◽  
Power Plant ◽  
Kinetic Energy ◽  
Solar Collector ◽  
Large Scale ◽  
Small Scale ◽  
Energy Losses ◽  
Solar Chimney ◽  
Solar Chimney Power Plant

An ideal air standard cycle analysis of the solar chimney power plant gives the limiting performance, ideal efficiencies and relationships between main variables. The present paper includes chimney friction, system, turbine and exit kinetic energy losses in the analysis. A simple model of the solar collector is used to include the coupling of the mass flow and temperature rise in the solar collector. The method is used to predict the performance and operating range of a large-scale plant. The solar chimney model is verified by comparing the simulation of a small-scale plant with experimental data. [S0199-6231(00)00503-7]

Thermoeconomic Optimization of a Solar Chimney Power Plant

2008 ◽  
Vol 130 (2) ◽  
Author(s):  
Johannes P. Pretorius ◽  
Detlev G. Kröger
Keyword(s):  
Power Plant ◽  
Computer Simulations ◽  
Large Scale ◽  
Cost Model ◽  
Solar Chimney ◽  
Construction Costs ◽  
Cost Structures ◽  
Solar Chimney Power Plant

No physical optimum solar chimney power plant exists when only regarding the dimensions of such a plant. However, if construction costs are introduced, thermoeconomically optimal plant configurations may be established. This paper investigates the thermoeconomic optimization of a large-scale solar chimney power plant. Initially, relevant dimensions are selected, which are to be optimized. An approximated cost model is then developed, giving the capacity for finding optimum plant dimensions for different cost structures. Multiple computer simulations are performed and results are compared to the approximated cost of each specific plant. Thermoeconomically optimal plant configurations are obtained.

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

2006 ◽  
Vol 128 (3) ◽  
pp. 302-311 ◽  
Author(s):  
Johannes P. Pretorius ◽  
Detlev G. Kröger
Keyword(s):  
Power Plant ◽  
Large Scale ◽  
Power Production ◽  
Plant Performance ◽  
Solar Chimney ◽  
Roof Shape ◽  
Reference Plant ◽  
Computer Simulation Program ◽  
Solar Chimney Power Plant ◽  
Plant Power

This paper evaluates the performance of a large-scale solar chimney power plant. The study considers the performance of a particular reference plant under specified meteorological conditions at a reference location in South Africa. A computer simulation program is employed to solve the governing conservation and draught equations simultaneously. Newly developed convective heat transfer and momentum equations are included in the numerical model and multiple simulations are performed. Results indicate 24hr plant power production, while illustrating considerable daily and seasonal power output variations. It is shown that plant power production is a function of the collector roof shape and inlet height.

Evaluation of the experimental data to determine the performance of a solar chimney power plant

2020 ◽  
Vol 27 ◽  
pp. 102-106 ◽  
Author(s):  
Pramod Belkhode ◽  
Chandrasshekhar Sakhale ◽  
Ajay Bejalwar
Keyword(s):  
Experimental Data ◽  
Power Plant ◽  
Solar Chimney ◽  
Solar Chimney Power Plant

Sensitivity Analysis of the Operating and Technical Specifications of a Solar Chimney Power Plant

2006 ◽  
Vol 129 (2) ◽  
pp. 171-178 ◽  
Author(s):  
Johannes P. Pretorius ◽  
Detlev G. Kröger
Keyword(s):  
Sensitivity Analysis ◽  
Power Plant ◽  
Large Scale ◽  
Ambient Pressure ◽  
Ground Surface ◽  
Lapse Rate ◽  
Solar Chimney ◽  
Technical Specifications ◽  
Solar Chimney Power Plant ◽  
Ground Surface Roughness

This paper conducts a sensitivity analysis on the influence of the quality, thickness, reflectance, emissivity, shape, and insulation of the collector roof glass, the cross section of the collector roof supports, various ground types, ground surface roughness, absorptivity and emissivity, turbine inlet and bracing wheel loss coefficients, and the ambient pressure and lapse rate on the performance of a large-scale (reference) solar chimney power plant. Computer simulation results indicate that collector roof insulation, emissivity and reflectance, the ambient lapse rate, and ground absorptivity and emissivity all have a major effect on the power production of such a plant.

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