2 rotor performance increases with the increasing of sweeping area of the curtain arrangement.
The sweeping area of curtain can be attained by the increase of curtain lengths and the angles. A new augmented shroud integrated with VAWT was introduced by Wong et al Wong,
Chong et al. 2014 to improve performance of wind turbine system for urban area. This power augmented shroud can increase the performance of the VAWT significantly by
increasing the wind speed. It increases self-starting behavior of VAWT andpower coefficient. The current study is to understand the influence of guide vane dimension designs to
meet Savonius wind turbine efficiency. Guide vanes are arranged surround the two-blade Savonius wind turbine. Several dimension designs of guide vane will tested to determine the
most appropriate one to improve the Savonius wind turbine performance.
1.2. Problem Statement
The problem statements of this research are as follow: 1.
How is the guide vane design influence to increase Savonius Wind Turbine performance? 2.
What is the most suitable design of guide vane to increase Savonius Wind Turbine performance?
1.3. Objective of the Study
This research has objectives as follow: 1.
To understand the influence of the guide vane design towards increasing of Savonius Wind Turbine performance
2. To identify the suitable design to get maximum performance of Savonius Wind Turbine
1.4. Limitation of the Study
The writer limits the study in order to be focused on main idea of the study which is as follow:
1. Model of wind turbine is vertical axis Savonius with specifications as follow:
a. Turbine diameter
: 20 cm b.
Turbine height : 18 cm
c. Overlap
: 1 cm d.
Number of blade : 2 blades
e. Material
: Aluminum 2.
Wind speed was considered stationery and constant speed. perpustakaan.uns.ac.id
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Wind speed frequency variant are 16 hz that was equal to 7.7 ms, 18 hz that was equal to 8.6 ms, 20 hz that was equal to 9.7 ms, and 22 hz that was equal to 10.7 ms.
1.5. Contribution of the Study
Savonius wind turbine is not much preferred to be used because of its lower aerodynamic performance than other high-speed wind turbines. There are many theoretical
and experimental studies have been conducted to increase the low aerodynamic performance of the Savonius wind turbine to get maximum efficiency in using it. A lot of modifications of
turbine models have been tested to understand the effect on Savonius wind turbine performance. The addition of guide vane has been carried out to increase performance of
Savonius wind turbine. Guide vane placed in front of Savonius wind turbine to prevent negative torque that affect convex surface. Therefore, it directs the wind into concave blade,
the flow that passes over the concave blade has been able to produce a torque with the new force on the concave of other blade that rotates opposite direction to the wind. That way
could increase the power of Savonius wind rotor Altan and Atılgan 2012. Modification of
the guide vane design will carry out in this research by increasing of guide vane angle to determine the Savonius wind turbine efficiency. This research is expected to be a reference to
develop vertical axis Savonius wind turbine for renewable energy production. perpustakaan.uns.ac.id
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CHAPTER II LITERATURE REVIEW AND BASIC THEORY
