Abstract
The technical and economic features of a patented V-shape roof guide vane (VRGV) with a solar and wind power generation system mounted on an eco-roof system are presented in this paper. Moreover, this innovative VRGV was investigated on for the purpose of improving the performance of a vertical axis wind turbine (VAWT), which was installed on an eco-roof system to solve the low-efficiency power generation problem of the wind turbines under the condition of a low wind speed. This paper proposes a preliminary study for the performance of the VAWT with the VRGV on a building. This research used a mock-up building with a double slope roof, where a five straight-bladed VAWT was mounted and tested under two conditions, with and without the VRGV. From the comparative experiments, the self-starting performance and rotational speed of the VAWT mounted above a double slope roof with the VRGV have been significantly improved compared to the VAWT without the VRGV. Further, the power coefficient (Cp) of the VAWT can be augmented to about 71.2% increment due to the VRGV design. In addition, numerical simulations by computational fluid dynamics (CFD) were proposed to verify the augmented effect of the Cp of the VAWT under the influence of the VRGV in the experiment. Besides, economic estimation of the VRGV was conducted.
Highlights
The consumption of fossil fuels has become a major cause of environmental pollution in the world.Improvement in living standards has led to a significant growing demand for energy
Three sets of experiments with load were conducted for testing the wind turbine power performance using a dynamometer controller system, which were carried out under the same conditions, i.e., one for an open rotor (VAWT), another for a vertical axis wind turbine (VAWT) installed on a double slope roof and the third for a VAWT embedded in the double slope roof and V-Shape Roof Guide Vane (VRGV) were conducted
This VAWT-enabled eco-roof system integrated with VRGV can effectively maximize the house electricity generation compared to a conventional eco-roof
Summary
The consumption of fossil fuels has become a major cause of environmental pollution in the world. Improvement in living standards has led to a significant growing demand for energy. This increase in energy has caused an increment in the demand for fossil fuels, which has been known as the main cause of global warming issues. In order to prevent global warming, many countries have reached a consensus on inhibiting carbon dioxide emissions [1,2]. One effective strategy is to use renewable energy that generates electricity without pollution. A relevant research report shows that renewable
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