Unsteady Conjugate Numerical Simulation of the Solar Chimney Power Plant System with Vertical Heat Collector

2011 ◽  
Vol 704-705 ◽  
pp. 535-540 ◽  
Author(s):  
Yan Zhou ◽  
Xiao Hui Liu ◽  
Qing Ling Li
Keyword(s):  
Numerical Simulation ◽  
Power Plant ◽  
Solar Radiation ◽  
Output Power ◽  
Maximum Output Power ◽  
Maximum Output ◽  
Solar Chimney ◽  
Air Velocity ◽  
Heat Collector ◽  
Solar Chimney Power Plant

A new kind of solar chimney power plant system combining chimney and heat collector was designed. Paraffin was chosen as the material of energy storage layer and the unsteady conjugate numerical simulation of the system was done by Fluent software. The operation condition of the system was simulated when the solar radiation value was changed with time according to the actual situation. Simulation results showed that: with the increase of solar radiation, flow velocity of the air and the maximum output power increased. At twelve o'clock, the air velocity could reach 1.24 m/s and output power was 122W. Due to the energy storage effect of phase change materials, the system had output power of 1.3W at night. Moreover because of the continuous work of the heat storage layer, in the same condition of solar radiation, the air velocity and maximum output power increased with the system operation days extended.

scholarly journals Experimental Investigation on The Effect of Divergent Tower Solar Chimney on The Theoretical Power Potential

2021 ◽  
Vol 81 (1) ◽  
pp. 140-149
Author(s):  
Ahmad Jawad ◽  
Mohd Suffian Misaran ◽  
Md. Mizanur Rahman ◽  
Mohd Azlan Ismail
Keyword(s):  
Power Plant ◽  
Cost Ratio ◽  
Main Body ◽  
Test Results ◽  
Solar Chimney ◽  
Air Velocity ◽  
Higher Temperature ◽  
Electric Heat ◽  
Solar Chimney Power Plant ◽  
Tall Structure

Solar chimney power plant is a sustainable alternative for electricity generation using solar as the source of energy. In general, the main body of a solar chimney plant requires a tall structure which is costly and challenging to construct. Thus, it is important to increase the performance of the solar chimney power plant and have a better energy-cost ratio. This study aims to experimentally investigate the influence of divergent solar chimney as opposed to a cylindrical chimney on solar chimney performance. Three divergent scaled-down solar chimney model at 1-meter, 1.5-meter and 2-meter were fabricated and tested for its performance at various simulated heat loads. The test results were compared with similar heights cylindrical solar chimney. The experiments show that divergent solar chimney increases the theoretical power generation potential and improves the stalk effect and have higher outlet velocity compared to a cylindrical solar chimney. The power potential of the divergent chimney is increased up to 18 times with the maximum theoretical power obtain at 0.183W on the 2-meter divergent chimney. Higher temperature was recorded on the 2-meter divergent chimney outlet at 341.3k compared to 330.4k on the cylindrical chimney indicates better stack effect. The highest average velocities in the divergent and cylindrical chimneys were recorded under the electric heat load of 2 kW at 0.994 m/s and 0.820 m/s respectively in the 1-meter configuration. It is also observed that the air velocity in a shorter divergent chimney is higher than taller divergent chimney models while better compared to all cylindrical height. This study finds that a shorter divergent solar chimney produces greater energy compared to a higher cylindrical solar chimney. Therefore, it is possible to reduce the overall cost of solar chimney by reducing the height of the main structure without sacrificing the performance of the solar chimney.

Theoretical Performance Analysis of Solar Chimney Power Plant for Kota Region of Rajasthan, India

2015 ◽  
Vol 787 ◽  
pp. 157-161 ◽  
Author(s):  
Zainab Akhtar ◽  
K.V.S. Rao
Keyword(s):  
Power Plant ◽  
Solar Radiation ◽  
Power Output ◽  
Average Power ◽  
Energy Generation ◽  
Solar Chimney ◽  
Minute Interval ◽  
Average Power Output ◽  
Solar Chimney Power Plant ◽  
Theoretical Performance

A solar chimney power plant (SCPP) sometimes also called 'solar updraft tower' is a part of the solar thermal group of indirect solar conversion technologies, utilizing a combination of solar air collector and central updraft tube or chimney to generate a solar induced convective flow which drives pressure staged turbines to generate electricity. In this paper the performance of a solar chimney power plant (SCPP) is evaluated if established in the Kota region of Rajasthan in India. Kota has high intensity of solar radiation with more than 270 sunny days in a year. To investigate the theoretical performance evaluation of the solar chimney power plant in Kota region, total energy generation and average power output for every ten minute interval has been calculated on the basis of solar radiation and temperature data provided by Centre for wind energy Technology (C-WET) available for the period from June 2011-May 2012 for every ten minute interval. Subsequently day wise and month wise calculations have been performed for energy generation and power output for the year June 2011 - May 2012. Further, annual average power output of SCPP is calculated at Kota for different sets of dimensions of SCPP and assuming different values of collector efficiency. Power produced at the plant established in Kota region is compared with power output estimated by J. Schlaich by their experience gained from prototype of SCPP in Manzanares, Spain. Land area required for solar chimney power plant if installed in Kota region of Rajasthan India is calculated for 200 MW capacity plant.

Numerical simulation of the solar chimney power plant systems coupled with turbine

2008 ◽  
Vol 33 (5) ◽  
pp. 897-905 ◽  
Author(s):  
Ming Tingzhen ◽  
Liu Wei ◽  
Xu Guoling ◽  
Xiong Yanbin ◽  
Guan Xuhu ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Power Plant ◽  
Solar Chimney ◽  
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.

Numerical simulation of solar chimney power plant adopting the fan model

2018 ◽  
Vol 126 ◽  
pp. 1093-1101 ◽  
Author(s):  
Rayan Rabehi ◽  
Abla Chaker ◽  
Tingzhen Ming ◽  
Tingrui Gong
Keyword(s):  
Numerical Simulation ◽  
Power Plant ◽  
Solar Chimney ◽  
Solar Chimney Power Plant

scholarly journals Tandem Solar Cells Based on Cu2O and c-Si Subcells in Parallel Configuration: Numerical Simulation

2017 ◽  
Vol 2017 ◽  
pp. 1-6 ◽  
Author(s):  
Mihai Răzvan Mitroi ◽  
Valerică Ninulescu ◽  
Laurenţiu Fara
Keyword(s):  
Numerical Simulation ◽  
Solar Cells ◽  
Solar Cell ◽  
Output Power ◽  
High Efficiency ◽  
Low Cost ◽  
Maximum Output Power ◽  
Model Parameters ◽  
Maximum Output ◽  
Parallel Configuration

A tandem solar cell consisting of a bottom c-Si high-efficiency subcell and a top low-cost Cu2O subcell in parallel configuration is evaluated for the first time by a use of an electrical model. A numerical simulation based on the single-diode model of the solar cell is performed. The numerical method determines both the model parameters and the parameters of the subcells and tandem from the maximization of output power. The simulations indicate a theoretical limit value of the tandem power conversion efficiency of 31.23% at 298 K. The influence of temperature on the maximum output power is analyzed. This tandem configuration allows a great potential for the development of a new generation of low-cost high-efficiency solar cells.

Numerical simulation of the effect of chimney configuration on the performance of a solar chimney power plant

2021 ◽  
Author(s):  
Mazdak Arzpeyma ◽  
Saad Mekhilef ◽  
Kazi Md. Salim Newaz ◽  
Ben Horan ◽  
Mehdi Seyedmahmoudian ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Power Plant ◽  
Solar Chimney ◽  
Solar Chimney Power Plant
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