In Denmark a significant, and increasing, proportion of the country’s energy demand is met by wind energy. Windmills are developed for use in open landscapes and the sea, where it is the windiest; however the large windmills are difficult to locate elsewhere without bringing with them visual or noise disturbance to natural habitats or local communities. There is a need to produce far greater wind energy in response to both climatic considerations and the future security of energy supply. It is with this viewpoint that PLH wants to explore the potential of wind energy production in urban areas. We have an ongoing dialogue with researchers at the Technical University of Denmark’s wind energy department and the National Laboratory for Sustainable Energy (Risø), so that our ideas can be developed in collaboration with them.
Our first project involves the development of a windmill for use primarily in larger buildings in the industrial areas of cities. Although it is the windiest in the open countryside and sea, a significant wind supply can also be found in industrial areas characterized by spatially separated box shaped buildings with sparse vegetation. Local accelerations of the wind speed around the building’s corners and especially at the edges of the roof provide a sound basis for the development of wind mills that can capture this wind energy, found in an elongated belt ½-3 meters over the roof edge. PLH has designed a windmill that is a variant of the known Darrieus patent that, in contrast to the standard three-armed Danish windmill type, can function well in built-up areas with turbulent and gusting wind flows. The windmill is installed directly above the edge of the roof and has a horizontal format and elongated rotor. It can be modularly extended along its length.
Steen Enrico Andersen
+ 45 4036 6412