Simulation and cost analysis of variable ratio gearbox (VRG) using vertical axis wind turbine (VAWT) and continuous variable transmission (CVT) assembly

Date

2025

Adviser

Abriel S. Bulasag

Principal

Mabel S. Buela

Abstract

Adopting wind energy as a renewable energy source is costly due to multiple factors such as the lower energy generation, high setup costs, and difficulty due to its strict criteria for locations where wind turbines can be deployed. The exploration of a configuration with a Vertical Axis Wind Turbine added with a type of Variable Ratio Gearbox, Continuous Variable Transmission holds promise for locations that have unstable and slower wind speeds. This study aims to understand and analyze its energy production and costing compared to the same turbine with a Single Ratio Gearbox through simulations and computer programs. The simulations were done with Autodesk Fusion 360, while the programs were made with Python 3.12.1. The same programs were used to configure the turbine dimensions and gear ratio range for the CVT. Using wind speed datasets in the Philippines from the National Renewable Energy Laboratory, the energy production and the cost of the turbine setup are examined. After analyzing 10 datasets, the results of this study found that a CVT had a higher energy output than an SRG due to its better efficiency through the changing wind speeds; however, the additional cost of the Variable Ratio Gearbox assembly and the marginal increase in energy production result in a lower Benefit- Cost Ratio and a slower payback period. This study concluded that the SRG assembly, while less efficient and producing less energy, was more cost-effective than the VRG assembly. These results suggest the capability of a CVT in small wind turbines, but require further research to improve its benefit-cost ratio by improving its energy production further or by lowering its cost.

Language

English

Location

UP Rural High School

Notes

To access this capstone, please contact the UP Rural High School Library at uprhslibrary.uplb@up.edu.ph. You may also visit the library in person, provided you secure prior confirmation from the librarian. We will be happy to assist you.

Document Type

Capstone

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