Numerical Simulation of the Influence of Platform Pitch Motion on Power Generation Steadiness in Floating Offshore Wind Turbines
Journal Title: Environmental Science and Sustainable Development - Year 2017, Vol 2, Issue 1
Abstract
Offshore wind energy is a valuable renewable resource that is inexhaustible, strong, and consistent. To reduce cost and improve energy production efficiency, future trends are moving towards wind turbines in deep water, which use floating platforms such as tension leg platforms, barges, and semi-submersible designs. Compared to fixed based substructures, these floating platforms are in a state of constant motion which affects the power generation steadiness. The resulting complex dynamic behavior might compromise their efficiency and reduce their nominal life. The complex analysis of floating wind turbines requires computer tools that couple all the different components to represent the complete dynamic response. One such tool, developed by the National Renewable Energy Laboratory, is the aero-hydro-servo-elastic tool FAST. In this work, simplified models are used for three platform types, and the results are compared with FAST as a way of understanding the essential dynamics. Secondly, using FAST, the influence of platform pitch motion on the steadiness of power generation is examined. This analysis is done for all three platforms for a constant above rated wind speed and above average wave load. Results demonstrate that the power output fluctuation depends on the platform type and blade pitch motion. The effect of platform pitch on the steadiness of power output is only apparent under large oscillating pitch motion, where recurring power drops are observed. The semi-submersible design performs well with relatively steady power output, while the barge design has the most unsteady output, as a result of its susceptibility to typical wave loads.
Authors and Affiliations
Yehezkiel Tumewu,Petrone Crescenzo,Mettupalayam Sivaselvan,
Rebuilding Cultural Identity
Ever since the completion of the High Dam in 1964, Nubians have lost their culture and heritage as a result of sacrificing their land to flooding. Eventually, they became dispersed all over Sudan and Egypt with some endi...
Sustainability and diversity in the architecture of intercultural universities in Mexico
Intercultural universities in Mexico have been created since 2001, currently there are 12, the last one to be created is the Intercultural University of Baja California in San Quintin. These universities are governed by...
The Environmental and Economical Impacts of Using Media Façades in Commercial Buildings in Egypt
Media façades is a subdivision of urban computing integrating digital displays into buildings, including structures and road furniture. It is frequently connected with over dimensional screens and vivified, lit up public...
Regional Resource Urbanism, Envisioning an Adaptive Transition for the Urbanising Periphery of Kathmandu
Despite a strong tradition of harmony between the landscape and its settlements, Kathmandu's periphery now stands altered due to the contemporary challenges of modernisation. It has become the contested territory where r...
Numerical Simulation of the Influence of Platform Pitch Motion on Power Generation Steadiness in Floating Offshore Wind Turbines
Offshore wind energy is a valuable renewable resource that is inexhaustible, strong, and consistent. To reduce cost and improve energy production efficiency, future trends are moving towards wind turbines in deep water,...