Angular velocity of a combined unloaded Savonius turbine with a vortex inducing chamber: a CFD approach

Al-Faruk, Abdullah and Sharifian, Ahmad (2012) Angular velocity of a combined unloaded Savonius turbine with a vortex inducing chamber: a CFD approach. In: 2012 Qld Southern Regional Engineering Conference (SREC 2012), 1 Sept 2012, Toowoomba, Australia.

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Abstract

The non-polluting and freely available wind energy is one of the best ways to meet our energy needs avoiding greenhouse gas emissions and depletion of fossil energy resources. Being low cost power generation technology, wind energy is gaining popularity among researchers and their performance are constantly improving and still far from achieving their full potential. When compared among the wind turbines in terms of power coefficient, Vertical Axis Wind Turbines (VAWT) offer lower efficiency than Horizontal Axis Wind Turbines (HAWT). However, VAWTs have many advantages over others such as simplicity in the construction, self-starting capability, and steadiness of the output power regardless of the wind direction. It is perceived that the performance of Savonius turbines (a type of VAWT) can be improved using hot swirling flows induced by a heat source inside the turbine chamber. Many industrial waste heats are not recovered due to the associated costs and possible adverse effects on the efficiency of the primary system. These waste heats or the naturally available heat sources such as volcanoes, geothermal, or solar energy can be utilized to produce swirling flow when there is a source of angular momentum which can be simply an inexpensive cylindrical channel. The channel includes one or a few vertical slits and is currently used to onset fire whirls in the laboratories. The geometric similarities between the cylindrical channel and the Savonius turbine led to investigate the possibility of combining the two mechanisms into one. It is expected that the combined configuration would be able to simultaneously resolve issues associated with utilizing the waste heat as well as efficiency of Savonius turbine. This work deals with a basic design of such combined configuration. The preliminary results show a limited speed increase of a modified and unloaded Savonius turbine.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: No
Item Status: Live Archive
Additional Information: USQ conference.
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Mechanical and Mechatronic Engineering
Date Deposited: 18 Apr 2013 03:48
Last Modified: 15 Sep 2017 04:35
Uncontrolled Keywords: renewable energy; wind energy; Savonius wind turbine; swirling flow
Fields of Research : 09 Engineering > 0913 Mechanical Engineering > 091305 Energy Generation, Conversion and Storage Engineering
14 Economics > 1402 Applied Economics > 140205 Environment and Resource Economics
09 Engineering > 0906 Electrical and Electronic Engineering > 090608 Renewable Power and Energy Systems Engineering (excl. Solar Cells)
Socio-Economic Objective: B Economic Development > 85 Energy > 8505 Renewable Energy > 850599 Renewable Energy not elsewhere classified
URI: http://eprints.usq.edu.au/id/eprint/23044

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