A simplified analytical approach for evaluation of the optimal ratio of pressure drop across the turbine in solar chimney power plants

Nižetić, Sandro; Klarin, Branko

doi:10.1016/j.apenergy.2009.05.019

Cited by 81 publications

(14 citation statements)

References 11 publications

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“…Maia et al [19,20] and Ferreira et al [21] gave detailed theoretical evaluations of the influence of geometric parameters and materials on the behavior of the airflow in an SC prototype and analyzed the airflow characteristics of the systems, which can also be used as driers for agricultural use. Nizetic and Klarin [22] presented a simplified analytical approach for evaluating the factor of turbine pressure drop in solar chimney power plants, in which it was concluded that for solar chimney power plants, turbine pressure-drop factors are in the range of 0.8-0.9. Ming et al [23] presented an analysis on the influence of ambient crosswind on the thermal performance of SC.…”

Section: Introductionmentioning

confidence: 99%

Analysis of output power smoothing method of the solar chimney power generating system

Ming

Meng

Liu

et al. 2012

Int. J. Energy Res.

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SUMMARY Severe fluctuation of the output power is a common problem in the generating systems of various renewable energies. The concept of output power fluctuation factor of renewable energy power generating systems was put forward in this paper. Aiming to decrease the fluctuation factor of output power in solar chimney power generating systems (SC), a novel hybrid energy storage system made of water, and sandstone was employed to replace the traditional sandstone energy storage system. The mathematical models of fluid flow, heat transfer and power generating features of SC were established and the influences of material, depth, areas and location of the energy storage layer upon output power were analyzed. The simulation results indicated that adopting the hybrid energy storage of water and sandstone can effectively decrease the fluctuation factor of SC output power and hence smooth the SC output power. In addition, according to the largest daily power generating capability or the smallest peak fluctuation factor, the corresponding optimum depth of the water energy storage layer would be 5 cm or 20 cm, respectively. Copyright © 2012 John Wiley & Sons, Ltd.

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Section: Introductionmentioning

confidence: 99%

Analysis of output power smoothing method of the solar chimney power generating system

Ming

Meng

Liu

et al. 2012

Int. J. Energy Res.

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“…Fluri and von Backström compared different modeling approaches and layouts for solar updraft turbines, and confirmed the assumptions of previous researchers that the turbine efficiency of a solar updraft tower is approximately 80% [24,25]. Nizetic and Klari evaluated the influence of turbine pressure drop on the updraft tower; the turbine pressure drop factors were in the range of 0.8 to 0.9 [26].…”

Section: Introductionmentioning

confidence: 63%

Performance Analysis of an Updraft Tower System for Dry Cooling in Large-Scale Power Plants

2017

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An updraft tower cooling system is assessed for elimination of water use associated with power plant heat rejection. Heat rejected from the power plant condenser is used to warm the air at the base of an updraft tower; buoyancy-driven air flows through a recuperative turbine inside the tower. The secondary loop, which couples the power plant condenser to a heat exchanger at the tower base, can be configured either as a constant-pressure pump cycle or a vapor compression cycle. The novel use of a compressor can elevate the air temperature in the tower base to increases the turbine power recovery and decrease the power plant condensing temperature. The system feasibility is evaluated by comparing the net power needed to operate the system versus alternative dry cooling schemes. A thermodynamic model coupling all system components is developed for parametric studies and system performance evaluation. The model predicts that constant-pressure pump cycle consumes less power than using a compressor; the extra compression power required for temperature lift is much larger than the gain in turbine power output. The updraft tower system with a pumped secondary loop can allow dry cooling with less power plant efficiency penalty compared to air-cooled condensers.

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“…Pressure distribution in the solar chimney power plant has a large effect on the mass flow rate and consider as an important to analyze the solar chimney system and for finding the suitable ratio of pressure drop cross the turbines to predict the volume of energy produced of solar chimney power plant [52], [40], where static pressure into the solar collector will increase with flow direction and this disagreement with flow theory [18], which proved that the relative static pressure into a solar collector will decrease with the flow direction depending on Bernoulli equation which considered not suitable to get the pressure difference by the solar collector [53], [9]. While the investigation has conducted to 3D numerical simulations to define the optimal ratio of pressure drop across the turbine.…”

Section: Pressure Dropmentioning

confidence: 99%

“…The results indicate that the ratio of the effective absorption coefficient to the factor of commensurate convective energy lack and the ratio of the pressure drop by the turbine to the overall available pressure drop are parameters that thermodynamic analysis depends on it. [9], [64].…”

Section: Thermodynamic Cycle Analysismentioning

confidence: 99%

Evaluating The Performance of Solar Chimney Power Plant

Alktranee

Yaseen

2019

Int J Cont Res Rev

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Growing global energy demand has become worrying due to the fluctuating fossil fuel prices, the damage caused by the use of conventional fuels as the toxic emissions and global warming. Therefore, dependence on alternative and sustainable sources has become a pressing topic. In this paper will review the performance of solar chimney power plant, the parameters that affect on the performance, conversion efficiency and power output for a different collection of prototypes. During this study there are found that power output of the solar chimney power plant is directly proportional to increase of the height of the chimney, specifically when the solar chimney is sloped where the performances is better as well as the conversion efficiency. While increasing the diameter of collector will provide a big heating area which cause a decrease of air density due to rise in the air temperature under the solar collector which lead to increase the flow of driving force and the mass flow rate that causes an increase in the power output. Pressure drop is an important factor for identifying the maximum power output when the solar radiation is a constant which effect on thermodynamic properties. Therefore, the efficiency will increase with increasing the optimal proportion of pressure drop.

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A simplified analytical approach for evaluation of the optimal ratio of pressure drop across the turbine in solar chimney power plants

Cited by 81 publications

References 11 publications

Analysis of output power smoothing method of the solar chimney power generating system

Analysis of output power smoothing method of the solar chimney power generating system

Performance Analysis of an Updraft Tower System for Dry Cooling in Large-Scale Power Plants

Evaluating The Performance of Solar Chimney Power Plant

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