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1. Vertical wake deflection for offshore floating wind turbines by differential ballast control

Author

Carlo L. Bottasso, Mario A. Rotea, Stefano Letizia, Daniel J. Barreiro Clemente, Valerio I. Iungo, Emmanouil M. Nanos, and Chengyu Wang

Subjects
Paper, Ballast, History, Wind power, business.industry, Wake, ddc, Computer Science Applications, Education, Deflection (engineering), Environmental science, Submarine pipeline, business, Marine engineering
Abstract

This paper discusses the idea of vertical wake deflection for offshore wind turbines using active ballast control. First, the concept of active ballast control for changing the attitude of an offshore wind energy semi-submersible platform is presented and briefly explored. Next, the influence of vertical wake deflection on the wake behavior and power production of a cluster of two wind turbines is studied through wind tunnel experiments and LES simulations. Results show that vertical deflection changes substantially the wake characteristics and affects the inflow at a downstream wind turbine in terms of available kinetic energy and turbulence intensity. For the most favorable case considered here, the cluster power was increased by approximately 8%.

Published
2020
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2. Swedish partners target 1GW of wind

Subjects
Green technology, Wind power plants, Wind power, Wood pulp industry, Renewable energy, Paper, Paper industry, Petroleum, energy and mining industries
Abstract

Swedish pulp and paper producer SCA is working with OX2 to develop up to 1000MW of new wind power on its land within five years. Initially SCA and OX2 have [...]

Published
2019

3. Conservation Is Key.

Author

Avery, Tim

Subjects
GREEN movement, PRINTING, SUPPLIERS, PAPER, WIND power, CERTIFICATION
Abstract

The article reports that several U.S. printing firms and suppliers are supporting the burgeoning green movement to make their operations more sustainable. Smart Papers has expanded its Genesis paper line and it now offers 17 colors of paper and nine weights from 24 to 160 lb. The Paper Mill Store has reduced its annual natural gas usage by 1,250 therms when it started using only Green-e certified wind power for electricity. Moreover, Consolidated Graphics Inc. has achieved Forest Stewardship Council (FSC) certification for all 68 of its facilities in U.S. and Canada. The firm has also partnered with American Forests to contribute to reforestation efforts.

Published
2007