An Energy Potential Estimation Methodology and Novel Prototype Design for Building-Integrated Wind Turbines

Oscar Garcia,Mario Del Rio,Andoni Gonzalez-Arceo,Alain Ulazia,Sheila Carreno-Madinabeitia

doi:10.3390/en12102027

Abstract

ROSEO-BIWT is a new Building-Integrated Wind Turbine (BIWT) intended for installation on the edge of buildings. It consists of a Savonius wind turbine and guiding vanes to accelerate the usual horizontal wind, together with the vertical upward air stream on the wall. This edge effect improves the performance of the wind turbine, and its architectural integration is also beneficial. The hypothetical performance and design configuration were studied for a university building in Eibar city using wind data from the ERA5 reanalysis (European Centre for Medium-Range Weather Forecasts’ reanalysis), an anemometer to calibrate the data, and the actual small-scale behavior in a wind tunnel. The data acquired by the anemometer show high correlations with the ERA5 data in the direction parallel to the valley, and the calibration is therefore valid. According to the results, a wind speed augmentation factor of three due to the edge effect and concentration vanes would lead to a increase in working hours at the rated power, resulting annually in more than 2000 h.

Highlights

In general terms, the market for small wind turbines is currently growing, the sector of small wind turbines intended for installation in buildings is increasing at a lower rate
An integral methodology with preliminary results is presented for a new type of Building-Integrated Wind Turbine (BIWT)
An annual energy production (AEP) increase of 20% via PAGVs at the edge of the buildings must be demonstrated using a real prototype of ROSEO-BIWT at the edge of the building in Eibar

Summary

Introduction

The market for small wind turbines is currently growing, the sector of small wind turbines intended for installation in buildings is increasing at a lower rate. According to the World Wind Energy Association (WWEA) [1], the installation of small wind turbines will increase by around 12% annually in the 2015–2020 period. In the last several years, research is increasingly being focused on the development of different technologies that help minimize the energy consumption of buildings. This philosophy is known as nZEB (nearly Zero-Energy Building) [2], and it is included in the EU 2010/31/CE directive related to the energy efficiency of buildings. After 2018, every new public building should be constructed in accord with this regulation and, after 2020, every new building should be compliant

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