Computational fluid dynamics analysis on the performance of the new design of savonius wind turbine for urban wind energy exploitation systems

Date of Publication

2017

Document Type

Master's Thesis

Degree Name

Master of Science in Mechanical Engineering

College

Gokongwei College of Engineering

Department/Unit

Mechanical Engineering

Thesis Adviser

Aristotle T. Ubando

Defense Panel Member

Gerardo L. Augusto
Lawrence A. Gan Lim
Neil S. Lopez
Jonathan R. Dungca

Abstract/Summary

The world energy demand is increasing from day to day, which caused to increase the fossil fuel consumption that it is the main reason to increase the greenhouse gas emission. Due to this reason, the improvement in the energy generation technology is required. Furthermore, the urban wind energy is also an important energy source which can produce the clean energy in the urban area. In this case, Savonius wind turbine became the most suitable type because it can work in the low wind speed conditions as well without any sound pollution.

Many computational methods were conducted in order to find-out its strength and weakness. By using numerical method to predict the performance of Savonius wind turbine provided us extremely benefit over the classical experimental techniques. The major advantages of the computational study are more economical than doing the experiment and avoided the human errors. In the present study, the design of the new Savonius wind turbine was performed by varying the diameter (D) ranged from 0.29- 0.4m, height (H) ranged from 0.16-0.35m, and twist angle ({u1D6FC}) ranged from 15-65o.

Furthermore, the statistical analysis software (JMP) with the space filling design method was used to generate the number of runs (sample size) and then it also produced a table which cosisted the design level of each factor. Moreover, the new design of Savonius wind turbine was designed by using SolidWorks software following the level of each factor in that table which was produced by sphere packing design method. Additionally, the statistical analysis software (JMP) was used to predict the effect of each parameter on the moment and power coefficient yields of the new design of Savonius wind turbine and Gaussian process (GASP) model was used to fit the model.

After the prediction was done, a geometry was selected in order to perform the simulation again with varying the tip speed ratio ({u1D706}). Moreover, after the simulation was done, the comparison of the performance between the new design of Savonius wind turbine with semi-cylindrical Savonius wind turbine and the previous studies were performed. The results showed that the model is fitted as well and the new design of Savonius wind turbine is very good at starting performance. Moreover, the performance gains of the new design of Savonius wind turbine over semi-cylindrical Savonius wind turbine, the study of Yan-Fei and Mao-Sheng (2013), the study of Larin et al. (2016) and David et al. (2016) are found to be 8.16%, 13.28%, 1.38% and 2.32%, respectively.

Abstract Format

html

Language

English

Format

Electronic

Accession Number

CDTG007158

Shelf Location

Archives, The Learning Commons, 12F Henry Sy Sr. Hall

Physical Description

1 computer disc ; 4 3/4 in.

Keywords

Wind turbines; Turbines; Windmills

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