Design of an automatic transmission system to improve energy capture of vertical axis wind turbine

Nowadays, renewable energies are highly demanded as they are sustainable and environmentally friendly. One of the renewable energy is wind, and it can be harvested by using a wind turbine. There are two types of wind turbines: Horizontal Axis Wind Turbine (HAWT) and Vertical Axis Wind Turbine (VA...

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Main Author:	Aladwani, Habeeb A H R
Format:	Thesis
Language:	English
Published:	2021
Subjects:	Vertical axis wind turbines
Online Access:	http://psasir.upm.edu.my/id/eprint/104051/1/HABEEB%20A%20H%20R%20ALADWANI%20-%20IR.pdf
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spelling	my-upm-ir.1040512023-07-07T01:22:09Z Design of an automatic transmission system to improve energy capture of vertical axis wind turbine 2021-05 Aladwani, Habeeb A H R Nowadays, renewable energies are highly demanded as they are sustainable and environmentally friendly. One of the renewable energy is wind, and it can be harvested by using a wind turbine. There are two types of wind turbines: Horizontal Axis Wind Turbine (HAWT) and Vertical Axis Wind Turbine (VAWT). Large scale wind turbines mostly use Continuously Variable Transmission (CVT) as the transmission system, which is needless to say its efficiency; it is highly efficient. However, it comes with high complexity and cost too. Meanwhile, most small-scale wind turbines in the current market offer a one-speed gearing system only, which means no gear ratios are varied, resulting in low energy efficiency and leading to gears failure. They have recognized a need for the continuous monitoring of major wind turbine components, gearbox parts. These components are seen to require substantial maintenance and repair efforts. For a fixed-speed wind turbine, the generator is directly connected to the electrical grid and they have several drawbacks in which the reactive power or the grid voltage level cannot be controlled. This research concerns the design of an automatic transmission system in VAWT to increase its efficiency in harvesting energy. The gear and clutch system was designed and fabricated for VAWT and the system was analyzed. The gear and clutch system was calculated using the gear and clutch formula. Then, the system was designed using Solidworks and fabricated using a 3D printer for VAWT. The gear ratios have been varied and the number of gears has been increased to two. A Centrifugal clutch is applied to the gear to perform its automatic gear shifting. During the test, incoming wind speed is firstly increased until the vertical axis wind turbine started to spin, then the wind speed is decreased. The incoming wind speed is restricted from 0 m/s to 20 m/s. The energy harvesting efficiency is measured by comparing a vertical axis wind turbine's output voltage and output power with automatic and without automatic transmission systems. The result shows that applying automatic transmission systems with a centrifugal clutch for VAWT is reliable and improves its efficiency. Generally, with the application of an automatic transmission system, the start-up wind speed for VAWT to spin was reduced from 20 m/s to 13 m/s. The VAWT with an automatic transmission system started to spin at 13 m/s of wind speed and it could maintain its spinning even the incoming wind speed was reduced. The voltage and power produced also show that the VAWT can optimize energy harvesting efficiency with less energy loss. Vertical axis wind turbines 2021-05 Thesis http://psasir.upm.edu.my/id/eprint/104051/ http://psasir.upm.edu.my/id/eprint/104051/1/HABEEB%20A%20H%20R%20ALADWANI%20-%20IR.pdf text en public doctoral Universiti Putra Malaysia Vertical axis wind turbines Ariffin, Mohd Khairol Anuar
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English
advisor	Ariffin, Mohd Khairol Anuar
topic	Vertical axis wind turbines
spellingShingle	Vertical axis wind turbines Aladwani, Habeeb A H R Design of an automatic transmission system to improve energy capture of vertical axis wind turbine
description	Nowadays, renewable energies are highly demanded as they are sustainable and environmentally friendly. One of the renewable energy is wind, and it can be harvested by using a wind turbine. There are two types of wind turbines: Horizontal Axis Wind Turbine (HAWT) and Vertical Axis Wind Turbine (VAWT). Large scale wind turbines mostly use Continuously Variable Transmission (CVT) as the transmission system, which is needless to say its efficiency; it is highly efficient. However, it comes with high complexity and cost too. Meanwhile, most small-scale wind turbines in the current market offer a one-speed gearing system only, which means no gear ratios are varied, resulting in low energy efficiency and leading to gears failure. They have recognized a need for the continuous monitoring of major wind turbine components, gearbox parts. These components are seen to require substantial maintenance and repair efforts. For a fixed-speed wind turbine, the generator is directly connected to the electrical grid and they have several drawbacks in which the reactive power or the grid voltage level cannot be controlled. This research concerns the design of an automatic transmission system in VAWT to increase its efficiency in harvesting energy. The gear and clutch system was designed and fabricated for VAWT and the system was analyzed. The gear and clutch system was calculated using the gear and clutch formula. Then, the system was designed using Solidworks and fabricated using a 3D printer for VAWT. The gear ratios have been varied and the number of gears has been increased to two. A Centrifugal clutch is applied to the gear to perform its automatic gear shifting. During the test, incoming wind speed is firstly increased until the vertical axis wind turbine started to spin, then the wind speed is decreased. The incoming wind speed is restricted from 0 m/s to 20 m/s. The energy harvesting efficiency is measured by comparing a vertical axis wind turbine's output voltage and output power with automatic and without automatic transmission systems. The result shows that applying automatic transmission systems with a centrifugal clutch for VAWT is reliable and improves its efficiency. Generally, with the application of an automatic transmission system, the start-up wind speed for VAWT to spin was reduced from 20 m/s to 13 m/s. The VAWT with an automatic transmission system started to spin at 13 m/s of wind speed and it could maintain its spinning even the incoming wind speed was reduced. The voltage and power produced also show that the VAWT can optimize energy harvesting efficiency with less energy loss.
format	Thesis
qualification_level	Doctorate
author	Aladwani, Habeeb A H R
author_facet	Aladwani, Habeeb A H R
author_sort	Aladwani, Habeeb A H R
title	Design of an automatic transmission system to improve energy capture of vertical axis wind turbine
title_short	Design of an automatic transmission system to improve energy capture of vertical axis wind turbine
title_full	Design of an automatic transmission system to improve energy capture of vertical axis wind turbine
title_fullStr	Design of an automatic transmission system to improve energy capture of vertical axis wind turbine
title_full_unstemmed	Design of an automatic transmission system to improve energy capture of vertical axis wind turbine
title_sort	design of an automatic transmission system to improve energy capture of vertical axis wind turbine
granting_institution	Universiti Putra Malaysia
publishDate	2021
url	http://psasir.upm.edu.my/id/eprint/104051/1/HABEEB%20A%20H%20R%20ALADWANI%20-%20IR.pdf
_version_	1776100399525134336

Design of an automatic transmission system to improve energy capture of vertical axis wind turbine

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