panagiotis mouzakis - Academia.edu (original) (raw)
Papers by panagiotis mouzakis
Journal of Marine Engineering & Technology, 2010
Η παρούσα διπλωματική διατριβή περιλαμβάνει μία σε βάθος ανάλυση των προβλημάτων ποιότητας ηλεκτρ... more Η παρούσα διπλωματική διατριβή περιλαμβάνει μία σε βάθος ανάλυση των προβλημάτων ποιότητας ηλεκτρικής ισχύος σε συστήματα πρωραίων πλευρικών προωστηρίων μηχανισμών (bow thrusters) στα πλοία τροφοδοτούμενα με ηλεκτρική ισχύ από ατμοστροβιλογεννήτριες, δηζελογεννήτριες (συνοδευόμενες από τον ρυθμιστή στροφών ατμοστροβίλου / δηζελομηχανής , διεγέρτη εναλλασσομένου ρεύματος, σύγχρονη γεννήτρια, ατμοστρόβιλο και κινητήρα εσωτερικής καύσεως πετρελαίου) και ιδανικές πηγές τάσεως. Μελετώνται διάφορες διαμορφώσεις περιλαμβάνοντας τη χρήση ασύγχρονων ηλεκτρικών κινητήρων (squirrel cage / wound rotor σε μηχανική σύμπλεξη με έλικες σταθερού και ρυθμιζομένου βήματος). Επιπλέον, μία σύντομη ανάλυση όσον αφορά τα pods και τις εφαρμογές τους πραγματοποιήθηκε μελετώντας τις μεταβατικές απαιτήσεις τους σε ηλεκτρική ισχύ συμπεριλαμβανομένου τριών διαφορετικών σεναρίων ελιγμών και την χρήση δύο διαφορετικών κινητήρων (σύγχρονος και ασύγχρονος squirrel cage). Για τις εργασίες της παρούσας διπλωματικής δ...
2009 IEEE Electric Ship Technologies Symposium, 2009
Journal of Marine Engineering & Technology, 2016
Journal of Marine Engineering & Technology, 2016
Journal of Marine Engineering & Technology, 2016
This paper provides the main concept of reactive power compensation onboard ship electrical energ... more This paper provides the main concept of reactive power compensation onboard ship electrical energy systems mainly as a retrofitting means towards assisting the generator plant and improving the ship efficiency in terms of fuel consumption and emissions. The alternative means are presented and discussed via the support of actual case studies.
The target of this paper is twofold: primarily to highlight the significant effect of certain pow... more The target of this paper is twofold: primarily to highlight the significant effect of certain power supply quality problems on the normal operation of the entire ship grid, namely inrush currents and voltage dips due to manoeuvring thruster motor starting-ups. At a second stage, the paper aims at recommending some amelioration of standardization status. Hence, the authors suggest the exploitation of existing experience on pulsed load standardizing, taking into account the resemblance between the systems. The study is enriched by actual case studies and simulations in PSCAD computer program. . Keywords: power quality, thruster, pulsed loads.
At present, natural gas is a plausible part of the solution to reducing CO 2 emissions from shipp... more At present, natural gas is a plausible part of the solution to reducing CO 2 emissions from shipping due to a reduction in shipboard carbon emissions when it is used. Natural gas has a favourable energy density and price when compared to oil, as well as significant reductions in NO x , SO x and PM emissions. The established natural gas and LNG carrier market has also advanced the need for classification society rules for the storage of both liquid and gaseous fuels that have already been readily applied to ships using natural gas as a fuel supply. The main obstacles to the implementation of natural gas are its low storage density, the economic viability of retrofit into existing ships, its safe storage and its supply and availability in ports. This study focuses on examining the viability of natural gas for powering a panamax container carrier with a specific route and hence a specific operating profile in order to evaluate the overall ship impact and the potential CO 2 reductions from modifications to the ship including the selection of fuel, marine power plant and transmission combinations. A panamax container carrier has been investigated because this ship type represents a significant proportion of the market, has unique power requirements and is volume and stability limited. Solutions will examine a trade-off between the amount of shipboard natural gas utilised and the combined cost of fuel and CO 2 emissions, from the retrofitting of existing ships to more significant changes, only viable for a new build.
Journal of Marine Engineering & Technology, 2010
Η παρούσα διπλωματική διατριβή περιλαμβάνει μία σε βάθος ανάλυση των προβλημάτων ποιότητας ηλεκτρ... more Η παρούσα διπλωματική διατριβή περιλαμβάνει μία σε βάθος ανάλυση των προβλημάτων ποιότητας ηλεκτρικής ισχύος σε συστήματα πρωραίων πλευρικών προωστηρίων μηχανισμών (bow thrusters) στα πλοία τροφοδοτούμενα με ηλεκτρική ισχύ από ατμοστροβιλογεννήτριες, δηζελογεννήτριες (συνοδευόμενες από τον ρυθμιστή στροφών ατμοστροβίλου / δηζελομηχανής , διεγέρτη εναλλασσομένου ρεύματος, σύγχρονη γεννήτρια, ατμοστρόβιλο και κινητήρα εσωτερικής καύσεως πετρελαίου) και ιδανικές πηγές τάσεως. Μελετώνται διάφορες διαμορφώσεις περιλαμβάνοντας τη χρήση ασύγχρονων ηλεκτρικών κινητήρων (squirrel cage / wound rotor σε μηχανική σύμπλεξη με έλικες σταθερού και ρυθμιζομένου βήματος). Επιπλέον, μία σύντομη ανάλυση όσον αφορά τα pods και τις εφαρμογές τους πραγματοποιήθηκε μελετώντας τις μεταβατικές απαιτήσεις τους σε ηλεκτρική ισχύ συμπεριλαμβανομένου τριών διαφορετικών σεναρίων ελιγμών και την χρήση δύο διαφορετικών κινητήρων (σύγχρονος και ασύγχρονος squirrel cage). Για τις εργασίες της παρούσας διπλωματικής δ...
2009 IEEE Electric Ship Technologies Symposium, 2009
Journal of Marine Engineering & Technology, 2016
Journal of Marine Engineering & Technology, 2016
Journal of Marine Engineering & Technology, 2016
This paper provides the main concept of reactive power compensation onboard ship electrical energ... more This paper provides the main concept of reactive power compensation onboard ship electrical energy systems mainly as a retrofitting means towards assisting the generator plant and improving the ship efficiency in terms of fuel consumption and emissions. The alternative means are presented and discussed via the support of actual case studies.
The target of this paper is twofold: primarily to highlight the significant effect of certain pow... more The target of this paper is twofold: primarily to highlight the significant effect of certain power supply quality problems on the normal operation of the entire ship grid, namely inrush currents and voltage dips due to manoeuvring thruster motor starting-ups. At a second stage, the paper aims at recommending some amelioration of standardization status. Hence, the authors suggest the exploitation of existing experience on pulsed load standardizing, taking into account the resemblance between the systems. The study is enriched by actual case studies and simulations in PSCAD computer program. . Keywords: power quality, thruster, pulsed loads.
At present, natural gas is a plausible part of the solution to reducing CO 2 emissions from shipp... more At present, natural gas is a plausible part of the solution to reducing CO 2 emissions from shipping due to a reduction in shipboard carbon emissions when it is used. Natural gas has a favourable energy density and price when compared to oil, as well as significant reductions in NO x , SO x and PM emissions. The established natural gas and LNG carrier market has also advanced the need for classification society rules for the storage of both liquid and gaseous fuels that have already been readily applied to ships using natural gas as a fuel supply. The main obstacles to the implementation of natural gas are its low storage density, the economic viability of retrofit into existing ships, its safe storage and its supply and availability in ports. This study focuses on examining the viability of natural gas for powering a panamax container carrier with a specific route and hence a specific operating profile in order to evaluate the overall ship impact and the potential CO 2 reductions from modifications to the ship including the selection of fuel, marine power plant and transmission combinations. A panamax container carrier has been investigated because this ship type represents a significant proportion of the market, has unique power requirements and is volume and stability limited. Solutions will examine a trade-off between the amount of shipboard natural gas utilised and the combined cost of fuel and CO 2 emissions, from the retrofitting of existing ships to more significant changes, only viable for a new build.