M. Casini, Small Vertical Axis Wind Turbines for Energy Efficiency of Buildings, ICCGE 2015, Amsterdam (original) (raw)

Small Vertical Axis Wind Turbines for Energy Efficiency of Buildings

Journal of Clean Energy Technologies, 2015

The integration of renewable resources in buildings is a fundamental aspect of the 21st-century architecture in order to achieve zero energy buildings (ZEB), reduce the consumption of fossil energy and cut carbon emissions in urban areas. Besides photovoltaic systems, nowadays Vertical Axis Wind Turbines, whose business is growing globally, are becoming particularly interesting because of the potential to produce energy and to be building integrated. These small wind generators (200 W-10kW) can be used as stand-alone systems or as grid connected systems, and both can be paired with other energy conversion systems, such as photovoltaics. With a height from 2 to 10 meters, small wind turbines can be placed on rooftops, on streets or in gardens, they have relatively little visual impact and are able to produce energy even from modest wind flows. In addition to that, small wind turbines may also be coupled to street lighting systems (smart lighting). The article presents an analysis of the different types of vertical wind turbines available on the market, including investigational products, and illustrates how it is possible to install them on buildings (Building Augmented Wind Turbines) and the benefits achieved in terms of energy production compared to photovoltaic systems. Index Terms-Energy efficiency of buildings, renewable energy, small wind turbines, building integrated wind turbines, building augmented wind turbines, vertical axis wind turbines.

Vertical axis resistance type wind turbines for use in buildings

Renewable Energy, 2009

Renewable energy generation in the urban environment has been receiving an increased attention over recent years due to the proximity with the point of use. Building integrated wind turbines are an interesting option in this respect. However, due to technical as well as architectural barriers, the uptake of wind energy converters into buildings has been rather limited. This paper analyses the oldest known form of wind energy converter, the Sistan type windmill, and discusses modern adaptations of this drag force type energy converter for building integration. It is shown that design improvements can lead to an increase of the theoretical efficiency of a drag force type rotor to about 48% (conservative) or 61% (optimistic). Initial experiments with a scale model have shown that efficiencies higher than 40% can be achieved. The integration of the proposed design into buildings is related to current building integrated wind turbine types and demonstrated architecturally.

Analysys of the Performance of Small Wind Turbines Darrieus and Options for Their Integration in Buildings

Contemporary Materials, 2015

Given the environmental and energy saving effect of the use of small wind turbines in urban environments, scientists, architects, manufacturers, investors and government institutions have joined forces for more extensive studies. The paper deals with research work of the optimized design of Darrieus turbine with 1 kW rated power in a particular climate. For purposes of the study a universal algorithm implemented with code in C++ has been developed. Thus it is possible to determine the turbine power developed and its efficiency in climate change factors air temperature, speed and intensity of the wind. The monitoring data cover a period of six months (a total of 18 533 measurements) for specific climatic region.

Utilization of Wind Energy in Green Buildings

As known, buildings and structures are blamable for great consumption of electricity, water and material. Green and sustainable buildings aim to decrease the environmental impact of buildings and reducing the power consumption. One of the methods to achieve these goals is by using a wind-energy system. To design this system, big or small turbines (home-scale turbines) may be utilized. Using any type of these turbines depends on location, wind speed, and building structure. In this paper, a building model is introduced with a suitable system of wind turbines.

Home-Scale Vertical-Axis Wind Turbine for Electricity Generation

Recently, there is a serious problem in energy supply because of the increasing demand, the lack of fossil fuels, and the scarcity of new petroleum discoveries. All these factors lead to the insane increase of power costs. Thus, it is vital to expand in the fields of renewable energy resources, especially, wind energy. Based on the report of the Egyptian Ministry of Environment [1], it is expected to reduce the use of fossil fuel and nature gases from 94% (2007/2008) to 40% (2021/2022) and increase the use of renewable energy from wind power from 1% to 9% for the same period. Thus, wind energy is a strong alternative resource of energy because it is clean, cheap, and suitable to remote areas. Moreover, utilizing wind energy helps in reducing pollution and global warming. The objective of the present work is to generate 200 to 300 Watts by a small-scale vertical-axis (VAWT) wind turbine. The height of the turbine is 1.0 m with five blades. The turbine can be placed on building roofs. Thus, the present research aims to design, fabricate, and implement a sustainable, easy-make, and low-cost turbine that produces a relatively good amount of power.