Vi er en gruppe studenter og phd-stipendiater som jobber med fornybar energi innenfor mange forskjellige fagtradisjoner. Vi vil jobbe for at Norge skal bli et foregangsland gjennom utviklingen av et nytt og mer miljøvennlig energisystem. Vi ønsker en opplyst klimadebatt og helhetlige løsninger på problemene.
Ole-Erik Endrerud, PhD Student,
NORCOWE, Department of Mechanical and Structural Engineering and Material
Science, University of Stavanger
has been a popular source of renewable energy for some time now, but still, it’s
too expensive to spur a large-scale industrial development. My project, which
is a part of the Norwegian Centre for Offshore Wind Energy (NORCOWE), is trying
to do something about the cost-problem.
Figure 1:Screenshot of the simulation model in action. This is from running a case with the offshore wind park Sheringham Shoal
To make offshore wind more affordable we
are exploring how maintenance costs (which is 30 % of the total cost of a wind
turbine park) can be reduced and at the same time increase electricity production.
Using computerized simulation models (see Figure 1) we are trying to
explain the relationship and interdependency between the maintenance
organization (technicians, vessels, onshore bases, etc.) and the wind park, to
understand how the former affects the latter and vice versa.
the typical maintenance strategy is corrective maintenance; if we get a flat
tire we change it. This can result in a long period of downtime before it is
repaired, e.g., because we need to wait for a new tire, and you might get late
to work. The same problem exist for offshore wind parks, and all other production
or manufacturing system, and can be a very expensive endeavor for a park
operator. To reduce the impact of failure and repair we are looking at methods
and technologies to predict when a failure will occur, and we do this by
analyzing trends in condition data collected from the wind turbines, e.g.,
vibration and temperature measurements. The consequence of predicting failure
times accurately is better planning of repair jobs, and we can change out a
part just before it fail; but without the waiting time for parts or suitable
What I want you
to remember is that maintenance is more than repairing something that is
broken; it is more than just a necessary evil. It is a major cost and risk
factor for any company producing or manufacturing something, and therefore it’s
time to take it to the next level and give maintenance the attention and
position it deserves. An offshore wind turbine can be as intelligently designed
as a space rocket, but if it fail it’s nothing more than a giant scarecrow in
the middle of the sea.