CIMAC Congress - Schiff & Hafen

Monday, 14 June
Tuesday, 15 June
Wednesday, 16 June
Thursday, 17 June
vessel; such as propulsion, steering and power generation. By
introducing a function based set of rules, newdesigns and new
technology will be met by a technology neutral safety regime
allowing for innovation to take place within a controlled and
uniform verification scheme. The use of new technology and
new designs is a continuous process within the maritime
industry, and establishing the overall requirements to a vessel
will also contribute to a common safety level for all technologies
used and thus in a better way ensure that the safety regime is
not favoring one or more technologies. Det Norske Veritas is in
the forefront of this change towards a function based regime
and this paper will give a short look into how this may be
implemented.
An integrated modelling
framework for the design,
operation and control of
marine energy systems
G. G. Dimopoulos, N. M. P.
Kakalis, Det Norske Veritas,
Greece
Visit us at CIMAC Congress Bergen 2010
and rotating machinery such as heat exchangers, evaporators,
compressors, turbochargers, pumps, valves, pipes, etc. The
component process models are generic, reconfigurable, suitable
for different types of studies and valid for a wide range of
operating conditions. Then, following a hierarchical
decomposition approach the lower-level component models are
used to synthesise higher level subsystems and, in turn, complete
energy systems. Experimental or service data are used for model
verification and validation. The models are implemented in state
of the art process modelling tools, where they are coupled with
representations of operational scenarios/ profiles. In that manner
we are able to perform a variety of model-based studies and
applications like steady-state and dynamic simulation, design,
optimisation and control of user-defined energy system
configurations under realistic service conditions. The developed
Rapidly varying fuel costs, environmental
concerns and forthcoming emissions
regulations impose a pressure on ships to
operate in a more efficient, cost-effective
and environmentally friendly way. The
propulsion power and energy producing
onboard installation– i.e. the marine
energy system – is the main contributor
to the overall cost-effectiveness, emissions
footprint and efficiency of the vessel. To
meet those stringent and often
contradicting requirements, the
sophistication and, hence, complexity of
modern marine energy systems increases,
while operating frequently at extreme
conditions and close to the design limit.
The challenge of making both existing
and new marine energy systems more
energy efficient and environmentally
friendly imposes a need for new
approaches for system configuration,
design, operation and control that are
able to consider the energy production
and conversion onboard ships (fuel,
mechanical, electrical, thermal) in an
integrated manner. At the same time,
simultaneous assessment of performance,
safety, and reliability of marine systems,
especially under real service conditions
and transient operation modes are
becoming increasingly important for
both ship-owners and classification
societies. To date, however, there is no
formal methodological framework to
cover the aforementioned needs in a
holistic way. In this paper we present a
novel approach for integrated dynamic
process modelling and simulation of
marine energy systems. Our methodology
is based on the mathematical modelling
of the dynamic thermofluid behaviour of
components including energy conversion
L’Orange – Leading in
fuel injection technology
With its pioneering achievements in injection technology, L’Orange has again and
again met the most demanding challenges, setting milestones in the history of
technology. As a leading supplier of injection systems in the off-highway segment,
we contribute to our customers’ success with innovative technology and efficient
processes. Today our injection systems are found in high-speed and mediumspeed
engines from all successful manufacturers worldwide. We are committed to
building on this trust as market leader and as a reliable partner to all our international
customers offering unmatched expertise and innovation.
L’Orange GmbH, P.O. Box 40 05 40, 70405 Stuttgart, Germany
Tel. +49 711/8 26 09-0, Fax +49 711/8 26 09-61, www.lorange.com
PQ 4/2010
No. 3 | 2010 | Ship & Offshore
83