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Karl Merz

Research Scientist

Karl Merz

Research Scientist

Karl Merz
Phone: 918 01 670
Department: Energy Systems
Office: Trondheim

Publications and responsibilities

Publications

Publication

Roadmap to the multidisciplinary design analysis and optimisation of wind energy systems

http://www.sintef.no/en/publications/publication/?pubid=CRIStin+1408029

A research agenda is described to further encourage the application of Multidisciplinary Design Analysis and Optimisation (MDAO) methodologies to wind energy systems. As a group of researchers closely collaborating within the International Energy Agency (IEA) Wind Task 37 for Wind Energy Systems Eng...

Authors Perez-Moreno S. Sanchez Zaaijer M.B. Bottasso C.L. Dykes K. Merz Karl Otto Réthoré P-E Zahle F.
Year 2016
Type Journal publication
Publication

Basic controller tuning for large offshore wind turbines

http://www.sintef.no/en/publications/publication/?pubid=CRIStin+1387909

Wind turbines are controlled through the electrical torque on the generator and the pitch of the blades. The tuning of the controller determines the dynamics of the system, which can then be good (smooth yet responsive) or bad (ineffective or unstable). A methodical investigation was conducted to de...

Authors Merz Karl Otto
Year 2016
Type Journal publication
Publication

Environment Loads for Frequency-Domain Aeroelastic Analysis of Offshore Wind Turbines

http://www.sintef.no/en/publications/publication/?pubid=CRIStin+1254083

Methods have been developed for the calculation of environmental loads, as input to the STAS wind power plant analysis program. A spectral model of rotationally-sampled atmospheric turbulence was extended using the multi-blade coordinate transformation. This gives the correct frequency spectra, domi...

Authors Merz Karl Otto
Year 2015
Type Report/thesis
Publication

A linear State-Space Model of an Offshore Wind Turbine, Implemented in the STAS Wind Power Plant Analysis Program

http://www.sintef.no/en/publications/publication/?pubid=CRIStin+1234629

A set of MATlab/Octave scripts have been developed, which output state matrices describing the linearized aerolastic dynamics of an offshore wind turbine. The aerodynamic model is based on momentum balance,and includes time-lag models for dynamic inflow, circulation lag, and dynamic stall. The struc...

Authors Merz Karl Otto
Year 2015
Type Report/thesis
Publication

Floating offshore turbines

http://www.sintef.no/en/publications/publication/?pubid=CRIStin+1142788

Floating wind turbines enable harvesting the offshore wind resources over deep sea. About 20 concepts are under development, at varying stages of maturity. Two concepts are demonstrated in full scale; these are HyWind and WindFloat. Both employ a standard on-shore wind turbine with only minor modifi...

Year 2015
Type Journal publication
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