The Experts below are selected from a list of 222 Experts worldwide ranked by ideXlab platform
Stefanos N. Manias - One of the best experts on this subject based on the ideXlab platform.
-
a data driven process controller for energy efficient variable speed pump operation in the central cooling water system of Marine vessels
IEEE Transactions on Industrial Electronics, 2015Co-Authors: Spyridon V Giannoutsos, Stefanos N. ManiasAbstract:In this paper, a data-driven process controller is designed and implemented onboard a typical Marine vessel for optimal variable-speed pump operation, leading to the energy efficiency optimization of its central cooling water system. To match variable flow rate requirements due to changes in the vessel's operational profile with respect to plant limitations, real-time process measurements are used as feedback signals to adjust the parameters and set-points of a data-driven process controller with self-tuned proportional-integral-differential control loops, which is realized through a commercial programmable logic controller and regulates the speed of sea water cooling pumps in order to maximize power saving potential during sea-going and cargo unloading periods. Data-driven control establishes system dynamics according to process parameter variation and ensures system reliability through parameter monitoring, regardless of the controlled plant model. The plant power saving potential is initially examined through a practical case study, whereas experimental results provided after the proposed control system retrofit installation onboard a tanker vessel show significant power balance improvement and reduction of diesel generator fuel consumption compared to existing pump throttle control methods, verifying that Marine Industry can be greatly benefited from this energy efficiency upgrade.
Dracos Vassalos - One of the best experts on this subject based on the ideXlab platform.
-
passenger ship safety containing the risk
Marine technology, 2006Co-Authors: Dracos VassalosAbstract:This paper presents a review of current risk-based design as applied to passenger ship safety and highlights future developments. Emphasis Is placed on demonstrating the considerable potential offered to the Marine Industry by embracing innovation, in terms of routine utilization in the ship design process of scientific and technological breakthroughs, to contain risk. Language: en
Green, Jonathan A. - One of the best experts on this subject based on the ideXlab platform.
-
First biologging record of a foraging red-throated loon Gavia stellata shows shallow and efficient diving in freshwater environments
Pacific Seabird Group, 2020Co-Authors: Duckworth James, O'brien Susan, Väisänen Roni, Lehikoinen Petteri, Petersen, Ib Krag, Daunt Francis, Green, Jonathan A.Abstract:Recently, Red-throated Loons Gavia stellata (RTL) have been the subject of increased interest due to their negative interactions with shipping, offshore wind farms, and other Marine Industry activities. This has driven a desire to quantify the behaviour and ecology of this understudied species, particularly during the non-breeding season. To achieve this, Time Depth Recorder (TDR) and Global Location Sensor (GLS) tags were deployed on individuals from several European locations. Due to an incidental mortality, one set of tags was retrieved early. The single set of tags recorded activity from June to August 2018. The TDR collected records for 14 d, providing the first ever biologging data on RTL foraging in Europe. The bird was tagged 90 km from the coast; therefore, it only used freshwater lakes and was never recorded entering saltwater. The individual mostly undertook shallow dives, with maximum and mean depths of 20 m and 5.4 m, respectively. Foraging constituted 22.9 % of total activity during the sampling period. The RTL had diel foraging patterns, with dives being shallower and more frequent at times of “twilight” compared to “daylight.” These results provide novel information on an RTL's diurnal patterns of water depth usage and foraging effort during the summer, demonstrating the potential of data loggers to provide key insights into the foraging ecology of this species
Ja Green - One of the best experts on this subject based on the ideXlab platform.
-
First biologging record of a foraging red-throated loon gavia stellata shows shallow and efficient diving in freshwater environments
2020Co-Authors: Duckworth J, O’brien S, Väisänen R, Lehikoinen P, Ik Petersen, Daunt F, Ja GreenAbstract:© 2020, Marine Ornithology. All rights reserved. Recently, Red-throated Loons Gavia stellata (RTL) have been the subject of increased interest due to their negative interactions with shipping, offshore wind farms, and other Marine Industry activities. This has driven a desire to quantify the behaviour and ecology of this understudied species, particularly during the non-breeding season. To achieve this, Time Depth Recorder (TDR) and Global Location Sensor (GLS) tags were deployed on individuals from several European locations. Due to an incidental mortality, one set of tags was retrieved early. The single set of tags recorded activity from June to August 2018. The TDR collected records for 14 d, providing the first ever biologging data on RTL foraging in Europe. The bird was tagged 90 km from the coast; therefore, it only used freshwater lakes and was never recorded entering saltwater. The individual mostly undertook shallow dives, with maximum and mean depths of 20 m and 5.4 m, respectively. Foraging constituted 22.9% of total activity during the sampling period. The RTL had diel foraging patterns, with dives being shallower and more frequent at times of “twilight” compared to “daylight.” These results provide novel information on an RTL’s diurnal patterns of water depth usage and foraging effort during the summer, demonstrating the potential of data loggers to provide key insights into the foraging ecology of this species
Spyridon V Giannoutsos - One of the best experts on this subject based on the ideXlab platform.
-
a data driven process controller for energy efficient variable speed pump operation in the central cooling water system of Marine vessels
IEEE Transactions on Industrial Electronics, 2015Co-Authors: Spyridon V Giannoutsos, Stefanos N. ManiasAbstract:In this paper, a data-driven process controller is designed and implemented onboard a typical Marine vessel for optimal variable-speed pump operation, leading to the energy efficiency optimization of its central cooling water system. To match variable flow rate requirements due to changes in the vessel's operational profile with respect to plant limitations, real-time process measurements are used as feedback signals to adjust the parameters and set-points of a data-driven process controller with self-tuned proportional-integral-differential control loops, which is realized through a commercial programmable logic controller and regulates the speed of sea water cooling pumps in order to maximize power saving potential during sea-going and cargo unloading periods. Data-driven control establishes system dynamics according to process parameter variation and ensures system reliability through parameter monitoring, regardless of the controlled plant model. The plant power saving potential is initially examined through a practical case study, whereas experimental results provided after the proposed control system retrofit installation onboard a tanker vessel show significant power balance improvement and reduction of diesel generator fuel consumption compared to existing pump throttle control methods, verifying that Marine Industry can be greatly benefited from this energy efficiency upgrade.