ANALYSIS THE THERMAL BEHAVIOR OF SOLAR CHIMNEY AT VARYING PARAMETERS

In this paper a computerized analysis of the fluid dynamics was conducted for a solar power plant stacked at collector height (H2 = 1.85 m, 3 m, 4 m and 5 m) with different solar irradiations such as 600 W / m2, 800 W / m2 m2, 900 W / m2 and 1000 W / m2. The slope of the roof and the radius of curvature of the manifold vary according to the height of the outlet manifold. The intake manifold height is set to H1 = 1.85 m from a solar cell power plant. The main objective of this work is to study the improvement of efficiency by modifying the design of the solar chimney system by diverging and radial curvature on the roof of the SCPP sensor. From the results, it was observed that the inclination and radius of curvature of the sensor roof had an effect on the efficiency of the sensor and that the efficiency of the sensor was at most 44.92% when the sensor height H2 = 5 m.


I.INTRODUCTION
Civilizations have used the energy of the sun for thousands of years. Ancient societies used mirrors and the sun to make fire. Exploring the architecture of early civilizations, one can see that the buildings were designed so that the sun could warm them up and, in turn, provide a heating system to people [1]. From these early beginnings, photovoltaic cells are now used to promote the untapped potential of the sun. Photovoltaic cells, more commonly known as solar cells, were discovered at the end of the 19th century and have been a source of electricity since the 1930s [2]. Individual panels can be used to power motor vehicles, but large solar cell fields can be used for power generation centers. The solar storage system is designed to generate hot air under the roof of the greenhouse sensor. The heated air rises through the buoyancy through a high structure in the middle of the sensor, called the solar chimney. The hot air drives during the ascent an air turbine that is arranged in the chimney to produce electricity. Several definitions can therefore be specified. The radiation of the beam is incident radiation from the direction of the sun. It means that it has not been dispersed. Radiation is the one that is useful for concentrated solar energy (CSP). Its intensity depends strongly on the orientation of the surface on which it is collected. As a result, the sensors must be aligned with the CSP technology during the day to maximize the received radiation. The orientation of the beam radiation can be calculated at any time of the season (for each latitude and longitude) of the Earth. This is due to geometric relationships, which will not be described later in this work

II.LITERATURE REVIEW Aakash Hassan, Majid Ali & Adeel Waqas [01]
In this study, parametric fluid parametric (CFD) analysis of a solar cell power plant was performed to illustrate the effects of the inclination of the sensor and the cutting angle on the performance of the Manzanares prototype. The numerical models were constructed with solar charge models, DO (discrete ordinate) and RNG k-3 turbulence. First, the CFD simulation results were validated by comparing the experimental data of the Manzanares prototype. Thus, based on the robustness of the numerical methods applied, several numerical simulations have been made with different inclinations of the deflection angles of the collector and of the chimney to improve the performance of the solar chimney.

Ehsan Gholamalizadeh & Man-Hoe Kim [04]
In this paper, we present a study of dynamic numerical calculation of fluids on a solar chimney system with inclined roof. A three-dimensional model that uses the turbulence closure R_G (normalization group) k_ε is simulated. The non-gray discrete orderly radiation model is used to implement the radiation transfer equation. To simulate solar radiation, the solar beam tracking algorithm is used. In a parametric study, the influence of the sensor configuration on the performance of the Manzanares power plant is shown. Nadia Saifia al el. [15] In this work, a detailed mathematical simulation and an experimental study of the air flow in the solar chimneys are studied. Several experimental tests have been performed on the solar chimney; The choice depends on the design parameters and the thermal performance for different geometric configurations. Experimental tests show that the field velocities in the chimney are influenced by the width of the channel and the angle of inclination of the chimney. Therefore, this article has conducted research to determine the effects of the inclination on household performance in the province of Ouargla, Algeria. Atit Koonsrisuk & Tawit Chitsomboon [11] The solar chimney system is a system that promises the production of electricity from free solar energy. In this study, a solar collector, a chimney and a turbine are theoretically modeled together and the iteration techniques are performed to solve the mathematical model obtained. The results are confirmed by the measurements of a true physical installation. In addition, the model is used to predict the performance characteristics of large-scale commercial sunshades, indicating that the size of the plant, the turbine drop pressure factor and the solar heat flux are important parameters for the performance of commercial sunshades. Performance improvement.
III.OBJECTIVE There are following objective of the present work.

3.
For the outlet boundary condition the gauge pressure needs to be set as zero because the flow of air inside the solar chimney is atmospheric. 4. Solar radiations were used on collector roof of solar chimney power plant vary with time and taken as 850 w/m 2 . 5. The Fluent solver is used for CFD analysis. 2) Computational fluid dynamics analysis for solar chimney power plant for with collector height H1 = H2 = 1.85 m (zero slope) at 600 W/m2 solar radiation: The maximum temperature 316K has been recorded and the temperature difference of 16 degree has been observed.  The maximum temperature 322K has been recorded and the temperature difference of 22 degree has been observed. The maximum velocity of 10.4 m/sec has been observed. The maximum temperature 324K has been recorded and the temperature difference of 24 degree has been observed.  The maximum temperature 325K has been recorded and the temperature difference of 25 degree has been observed.  The maximum temperature 327K has been recorded and the temperature difference of 27 degree has been observed.  The maximum temperature 319K has been recorded and the temperature difference of 19 degree has been observed. The computational fluid dynamics analysis has been performed on solar chimney power plant for with collector height H2 = 3 m at 600 W/m 2 solar radiation, to get velocity distribution of air inside the solar chimney. The maximum velocity of 8.01 m/sec has been observed. The computational fluid dynamics analysis has been performed on solar chimney power plant for with collector height H2 = 3 m at 800 W/m 2 solar radiation, to get temperature distribution over the solar chimney. The maximum temperature 326K has been recorded and the temperature difference of 26 degree has been observed. The computational fluid dynamics analysis has been performed on solar chimney power plant for with collector height H2 = 3 m at 800 W/m 2 solar radiation, to get velocity distribution of air inside the solar chimney. The maximum velocity of 8.01 m/sec has been observed. The computational fluid dynamics analysis has been performed on solar chimney power plant for with collector height H2 = 3 m at 850 W/m 2 solar radiation, to get temperature distribution over the solar chimney. The maximum temperature 324K has been recorded and the temperature difference of 24 degree has been observed.  The computational fluid dynamics analysis has been performed on solar chimney power plant for with collector height H2 = 3 m at 900 W/m 2 solar radiation, to get temperature distribution over the solar chimney. The maximum temperature 329K has been recorded and the temperature difference of 29 degree has been observed.   The maximum temperature 326K has been recorded and the temperature difference of 26 degree has been observed.  The maximum temperature 330K has been recorded and the temperature difference of 30 degree has been observed.  The computational fluid dynamics analysis has been performed on solar chimney power plant for with collector height H2 = 4 m at 900 W/m 2 solar radiation, to get temperature distribution over the solar chimney. The maximum temperature 329K has been recorded and the temperature difference of 29 degree has been observed.  The maximum temperature 333K has been recorded and the temperature difference of 33 degree has been observed.  The maximum temperature 321K has been recorded and the temperature difference of 21 degree has been observed.  The maximum temperature 328K has been recorded and the temperature difference of 28 degree has been observed.  The maximum temperature 331K has been recorded and the temperature difference of 31 degree has been observed. The maximum temperature 332K has been recorded and the temperature difference of 32 degree has been observed.  The maximum temperature 335K has been recorded and the temperature difference of 35 degree has been observed.  The maximum temperature 348K has been recorded and the temperature difference of 48 degree has been observed.  The maximum temperature 364K has been recorded and the temperature difference of 64 degree has been observed.  The maximum temperature 372K has been recorded and the temperature difference of 72 degree has been observed.  The maximum temperature 381K has been recorded and the temperature difference of 81 degree has been observed.  The maximum temperature 334K has been recorded and the temperature difference of 34 degree has been observed.  The maximum temperature 345K has been recorded and the temperature difference of 45 degree has been observed.  The maximum temperature 348K has been recorded and the temperature difference of 48 degree has been observed.  The maximum temperature 348K has been recorded and the temperature difference of 48 degree has been observed.  The maximum temperature 339K has been recorded and the temperature difference of 39 degree has been observed.  The maximum temperature 352K has been recorded and the temperature difference of 52 degree has been observed.  The maximum temperature 358K has been recorded and the temperature difference of 58 degree has been observed. The maximum temperature 365K has been recorded and the temperature difference of 65 degree has been observed.  The maximum temperature 321K has been recorded and the temperature difference of 21 degree has been observed.  The maximum temperature 328K has been recorded and the temperature difference of 28 degree has been observed.

Chimney efficiency:
The air heated in the collector and after passing through the turbine blades, will be entered in the chimney. Hot air flow obtained from the collector is converted into kinetic and potential energy, which causes convection currents in the chimney and drops pressure in the wind turbine.

Turbine efficiency:
Axial wind turbine is used in Solar Chimney Power Plant, which is located at the base of the chimney. The turbine converts kinetic energy of the air current into useful mechanical rotary work. Efficiency of a turbine can be taken as 0.8: ɳ ℎ 4 Collector Efficiency: According to reference Schlaich (1996), collector efficiency is ratio of the amount of heat obtained from air to the available heat from the sun irradiance, which is defined as: = ̇× × ∆ × The total efficiency of the system is defined by = × ℎ × Total power can be calculated as follows: = × ×      Fluid dynamics analysis was performed on a stacked power plant with collector height H1 = H2 = 1.85 m (zero waste) at 600 W / m 600 W / m2, 800 W / m2, 850 W / m2, 900 W / m2. m2 and 1000 W / m2 of solar radiation. The temperature distribution in the solar system was observed between 316K and 327K with a temperature increase of 16-27 degrees and the sensor efficiency increased from 29.58% to 33.27%.
The computer's fluid dynamics analysis was performed on a stacked power plant with H2 collector height = 3 but 600 W / m 600 W / m2, 800 W / m2, 850 W / m2, 900 W / m2 and 1000 W / m2 of solar radiation. The temperature distribution in the solar plant was observed in a range from 319 K to 332 K with a temperature increase of 19 to 32 degrees and the efficiency of the sensor increased from 31.26% to 35.48%.
Dynamic dynamic fluid analysis was performed on a stacked power plant with H2 collector height = 4 but 600 W / m 600 W / m2, 800 W / m2, 850 W / m2, 900 W / m2 and 1000 W / m2 of solar radiation. The temperature distribution within the solar cell stack was observed in a range from 319 K to 332 K with a temperature increase of Collector Efficiency at 600 w/m2 Collector Efficiency at 800 w/m2 Collector Efficiency at 850 w/m2 Collector Efficiency at 900 w/m2 Collector Efficiency at 1000 w/m2 19 to 32 degrees and the sensor efficiency increased from 32.20 to 37, 46%.
Dynamic dynamic fluid analysis was performed on a stacked power plant with H2 collector height = 5 but 600 W / m 600 W / m2, 800 W / m2, 850 W / m2, 900 W / m2 and 1000 W / m2 of solar radiation. The temperature distribution in the solar system was observed between 321K and 335K with a temperature increase of 21 to 35 degrees and the sensor efficiency increased from 34.55% to 38.82%.
CFD analysis was performed on a solar plant with a curvature on the main collector H1 = H2 = 1.85 m (zero offset) at 600 W / m2, 800 W / m2, 900 W / m2 and 1000 W / m2. M2 of solar radiation performed. The temperature distribution in the solar power plant was observed between 334 K and 366 K with a temperature increase of 34-66 degrees and the sensor efficiency increased from 31.42% to 39.04%.
CFD analysis was performed on a photovoltaic system stacked with a curvature on the collector with a height of H2 = 3 m and solar radiation of 600 W / m2, 800 W / m2, 900 W / m2 and 1000 W / m2. The temperature distribution in the solar system was observed between 339K and 365K with a temperature increase from 39 to 65 degrees and the sensor efficiency increased from 32.04% to 40.05%.
The CFD analysis was performed on a photovoltaic system stacked with a curvature on the collector with a height of H2 = 4 m with a solar radiation of 600 W / m2, 800 W / m2, 900 W / m2 and 1000 W / m2. The temperature distribution in the solar system was observed between 321K and 355K with a temperature increase of 21 to 55 degrees and the sensor efficiency increased from 34.51% to 42.02%.
The CFD analysis was performed on a stacked photovoltaic system with a curvature of the collector with a height of H2 = 5 m with solar irradiation of 600 W / m2, 800 W / m2, 900 W / m2 and 1000 W / m2. The temperature distribution in the solar plant was observed between 348K and 381K with a temperature increase of 48-81 degrees and the sensor efficiency increased from 35.49% to 44.92%.
From the above conclusion, it can be seen that the inclination and radius of curvature of the sensor roof influence the efficiency of the sensor and that the sensor efficiency is maximal when the height of the sensor H2 = 5 m.