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Wyświetlanie 1-10 z 65
Tytuł:
Energy Efficiency Design Index as a new criterion in ship design
Autorzy:
Szelangiewicz, T.
Żelazny, K.
Powiązania:
https://bibliotekanauki.pl/articles/359076.pdf
Data publikacji:
2012
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
Energy Efficiency Design Index
International Energy Efficiency Certificate for the ship
Opis:
Since 2013 Energy Efficiency Design Index (EEDI) for new ships will be enforced. Ships meeting the CO2 emission standards will be granted energy certificate required for their exploitation. The paper presents EEDI in the current form, the certification procedure, reduced CO2 emission planned for coming years, as well as potential for further EEDI value reduction.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2012, 32 (104) z. 1; 97-101
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Retrofitting the bow of a general cargo vessel andevaluating Energy Efficiency Operational Index
Autorzy:
Denev, Yordan
Powiązania:
https://bibliotekanauki.pl/articles/34603369.pdf
Data publikacji:
2023
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
retrofitting
bulbous bow
energy efficiency design index
return costs
Opis:
This report examines the feasibility and impact of retrofitting the bulbous bow on a general cargo ship, in terms of the energy efficiency operational index (EEOI), in the areas of Western Europe and the Eastern Mediterranean. Three ship forms were developed and analysed: with a bulbous bow, without a bulbous bow, and with a modified bulbous bow. The goal in developing the ship forms and conducting the analysis was to achieve minimal differences in the ship’s characteristics with the same volumetric displacement, aided by PolyCAD software. A route was selected between two ports: Varna and Rotterdam. The labour intensity of the bulbous bow retrofitting process was evaluated and approximate values of labours costs and cost for the task were determined. The results obtained for resistance during ship motion, EEOI, and fuel consumption reductions, or increases, were compared against the retrofitting values. The return cost of retrofitting is evaluated and measured in terms of fuel saved.
Źródło:
Polish Maritime Research; 2023, 4; 17-23
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Niektóre aspekty statystyczne planowania doświadczeń nieortogonalnych typu split-split-plot
Some statistical aspects of the planning of non-orthogonal experiments of split-split-plot type
Autorzy:
Ambroży-Deręgowska, Katarzyna
Mejza, Iwona
Powiązania:
https://bibliotekanauki.pl/articles/2198735.pdf
Data publikacji:
2014-12-31
Wydawca:
Instytut Hodowli i Aklimatyzacji Roślin
Tematy:
doświadczenia nieortogonalne
efektywność układu
układ blokowy częściowo zrównowazony
układ split-split-plot
design efficiency
non-orthogonal experiment
partially balanced block design
split-split-plot design
Opis:
Celem pracy jest zaprezentowanie pewnej metody konstrukcji układów niekompletnych typu split-split-plot dla doświadczeń nieortogonalnych z co najmniej trzema czynnikami. W literaturze znanych jest wiele metod konstrukcji układów niekompletnych. Często wykorzystuje się w nich bogatą teorię układów blokowych. Wybierając jeden z nich lub więcej z takich układów do wygenerowania na przykład, niekompletnego układu split-split-plot, szczególny nacisk należy położyć, między innymi, na optymalne wykorzystanie materiału doświadczalnego. Należy również zwrócić uwagę na ewentualność zastosowania obiektów kontrolnych lub wzorca dla jednego lub więcej czynników oraz możliwość takiego zaplanowania doświadczenia, aby najbardziej interesujące dla eksperymentatora kontrasty obiektowe były estymowane z największą precyzją (efektywnością). W pracy powyższe rozważania zilustrowano opisując nowy układ niekompletny typu split-split-plot na przykładzie doświadczenia z pszenicą ozimą. Przedstawiono statystyczne konsekwencje planowania doświadczeń w takim układzie. W analizie statystycznej zastosowano techniki właściwe dla tak zwanych doświadczeń wielowarstwowych oraz korzystano z teorii kontrastów bazowych.
The aim of this paper is to present a method of constructing incomplete split-split-plot type designs for non-orthogonal experiments with at least three factors. Many methods of constructing incomplete designs are known from the literature, often drawing on the rich theory of block designs. When choosing one or more such designs to generate, for example, an incomplete split-split-plot design, special attention must be paid, inter alia, to the optimal use of the experimental material. Consideration should also be given to the possibility of using control or standard treatments for one or more factors, and the possibility of planning the experiment so that the treatment contrasts most interesting to the researcher are estimated with the greatest precision (efficiency). In this paper, the above considerations are illustrated with reference to a new incomplete split-split-plot design for an experiment with winter wheat. The statistical consequences of planning an experiment with such a design are described. The statistical analysis uses techniques appropriate to multi-stratum experiments, as well as the theory of basic contrasts.
Źródło:
Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin; 2014, 274; 41-49
0373-7837
2657-8913
Pojawia się w:
Biuletyn Instytutu Hodowli i Aklimatyzacji Roślin
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vessel main propulsion engine performance evaluation
Autorzy:
Borkowski, T.
Kowalak, P.
Myśków, J.
Powiązania:
https://bibliotekanauki.pl/articles/247310.pdf
Data publikacji:
2012
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
ship main propulsion
marine diesel engine
Energy Efficiency Design Index
Opis:
In general, the performance of a ship in service is different from that obtained on shipyard sea trial. Apart from any differences due to loading conditions, and for which due correction should be made, these differences arise principally from the weather, fouling and surface deterioration of the hull and propeller. The influence of the weather, both in terms of wind and sea conditions, is an extremely important factor in ship performance analysis. Consequently, the weather effects needs to be taken into account if a realistic evaluation is to be made. The primary role of the ship service analysis is a standard of performance data, under varying operational and environmental conditions. The resulting information, derived from this data, becomes the basis for operational and chartering decision. In addition, the part for the data records is to enable the analysis of trends of either the hull or machinery, from which the identification of potential failure scenarios and maintenance decisions can be derived. The traditional method of data collection is the deck and engine room log records, and this is the most commonly used method today. In terms of data processing and capabilities, this method of data collection is far from ultimate, since involves significant data distortion risk. Instrumentation errors are always a potential source of concern in performance analysis methods. Such errors are generally in the form of instrument drift or gross distortion of the reading. However, these can generally be detected by the use of trend analysis techniques. The procedure for the evaluation of the ship's service performance, that relies on proven methods of main propulsion engine service data analysis used and applied for container vessel - small feeder. The vessel is equipped with indirect main propulsion, driven by means of modern medium speed engine. The different approach demonstrated to achieve the reliable and accurate main engine performance. The difference in developed engine power has been found, that corresponds well to registered sea trial results and engine retrofitting reports done, in order to limit the effective power.
Źródło:
Journal of KONES; 2012, 19, 2; 53-60
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of chosen parameters on the Energy Efficiency Design Index
Autorzy:
Szelangiewicz, T.
Żelazny, K.
Powiązania:
https://bibliotekanauki.pl/articles/359074.pdf
Data publikacji:
2012
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
Energy Efficiency Design Index
ship speed
decrease of ship speed
Opis:
Since 2013 Energy Efficiency Design Index (EEDI) for new ships will be enforced. Ships meeting the CO2 emission standards will be granted energy certificate required for their exploitation. The paper presents EEDI in the current form and influence of the ship speed and decrease of the ship speed on EEDI.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2012, 32 (104) z. 1; 102-107
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Energy efficiency design index of container vessel - operational approach
Autorzy:
Borkowski, T.
Kasyk, L.
Kowalak, P.
Powiązania:
https://bibliotekanauki.pl/articles/241715.pdf
Data publikacji:
2012
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
ship
main propulsion
marine diesel engine
Energy Efficiency Design Index
exhaust emission
Opis:
The ship "Energy Efficiency Design Index (EEDI)" has been formulated by the IMO Marine Environment Protection Committee (MEPC) as a measure of the CO2 emission performance of ships. The ship EEDI is calculated based on characteristics of the ship at build, incorporating parameters including ship capacity, engine power and fuel consumption. Shipping is responsible for CO2 discharge of approximately 3.3% global emission and despite being an energy-efficient transport means, compared with other transport modes, there are opportunities for increasing energy efficiency. The EEDI requires a minimum energy efficiency level (CO2 emissions) per capacity mile (e.g. tonne mile) for different ship type and size sectors. With the level being tightened over time, the EEDI will stimulate continued technical development of all the components influencing the energy efficiency of a ship. The paper presents an overview of EEDI calculation method for container vessels and results of experimental approach. The experimental process results through comprehensive analysis of operational data, from modern container vessel, equipped with direct main propulsion unit have been introduced. Ship operators have already been implementing energy efficiency operational measures and set goals for reducing the energy consumption of their fleet. Performance and savings are not always monitored and reported. However, it can be foreseen that such activity when is successfully promoted, reduction of CO2 emissions can be achieved.
Źródło:
Journal of KONES; 2012, 19, 4; 93-100
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental research of the impact of ship’s rolling on the performance of PV panels
Autorzy:
Zeńczak, Wojciech
Zapałowicz, Zbigniew
Powiązania:
https://bibliotekanauki.pl/articles/32897005.pdf
Data publikacji:
2022
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
ship power system
PV system
ship’s energy efficiency design index
ship rolling
Opis:
The aim of the International Maritime Organization (IMO) to reduce by half the amount of greenhouse gases emitted by marine ships by 2050, and its vision of the fastest total decarbonisation in the maritime shipping industry within the present century, calls for implementation with various means of decarbonisation. The IMO approaches the process of decarbonisation in two phases. Firstly, short-term, compact projects are to be considered, next, more complex, medium- and long-term solutions should be aimed at. The preferred arrangements to be applied are photovoltaic systems. Their performance depends to a high degree on the solar incidence angle. In the case of a ship swinging as a result of its course in relation to the wave and incidence direction, the incidence angle undergoes significant periodic changes with a significant effect on the power generated by the PV panels. As a result, the total amount of energy produced by the PV panels diminishes. The paper presents experimental research results obtained on the stand that allowed the investigation of PV panels in simulated marine conditions. Two characteristic positions of a PV panel’s rotation axis in relation to the solar rays’ incidence direction were investigated. It was proved for both variants that the rolling period and solar incidence angle affected the power generated by the PV panel.
Źródło:
Polish Maritime Research; 2022, 4; 132-144
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
CO2 emission level as a criterion in modern transport ship design
Poziom emisji CO2 jako kryterium projektowe współczesnych statków transportowych
Autorzy:
Szelangiewicz, T.
Żelazny, K.
Powiązania:
https://bibliotekanauki.pl/articles/132888.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
carbon dioxide emission
ship design
Energy Efficiency Design Index
EEDI
emisja dwutlenku węgla
projektowanie statku
wskaźnik efektywności energetycznej
Opis:
From 2013 onwards Energy Efficiency Design Index (EEDI) for new ships has been in force. The EEDI value for a given ship is calculated according to a standard formula and compared against a ship specific standard by means of a so called reference line which will be gradually changing (decreasing) in subse-quent years. The article presents possible ways of increasing ship propulsion efficiency in order to decrease ship propulsion power, EEDI value and CO2 levels.
Od roku 2013 obowiązuje projektowy wskaźnik efektywności energetycznej (EEDI) dla nowych statków. Wartość tego wskaźnika dla określonego statku obliczana jest według ustalonego wzoru i porównywana z normą dla tego statku (tzw. linią referencyjną), która będzie zmieniana (obniżana) w następnych latach. W artykule przedstawiono możliwości zwiększenia sprawności napędowej statku, a tym samym obniżenia mocy napędu wskaźnika EEDI i emisji CO2.
Źródło:
Combustion Engines; 2014, 53, 1; 59-68
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Environmentally friendly cruise seaports in Northern Europe – onshore power supply
Autorzy:
Kizielewicz, J.
Powiązania:
https://bibliotekanauki.pl/articles/24201450.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
onshore power supply
cruise seaports
environmental ship index
cruise shipping
port infrastructure
environmental sustainability
energy efficiency
energy efficiency design index
Opis:
The investment policy applied by seaport authorities has a great impact on the state of the natural environment in coastal regions. Unfortunately, in many cases, their environmental efforts are limited to the issues which are defined by the applicable legal regulations determined by International Maritime Organization, the Organization of United Nations and the European Commission etc. However, in recent years we can observe significant improvement in this area, especially in the seaports of Northern Europe. They often decide on highly capital-intensive pro-ecological investments allowing to reduce the level of pollution emitted from cruise ships during their handling in ports, such as e. g. the opportunity of connecting vessels to the shore-side energy supply systems. Various solutions in this area are currently used in the world. The ports in Northern Europe are currently the leaders in this area. The use of such solutions is cost-intensive, but it significantly reduces the level of pollution emitted by ships into the environment, and the level of noise and vibration caused by engines. This paper aims to assess the seaports' involvement in Northern Europe in the preparation of seaport infrastructure enabling cruise ships to be connected to the onshore power supply systems. The article contains the results of surveys conducted with the use of two methods to adjust the research technique to the respondents’ needs, i.e. CASI (Computer-Assisted Self Interviewing) and EMS (Electronic Mail Survey). The empirical research was conducted among the seaports in Northern Europe. The results of the survey may be of interest to seaport authorities and cruise ship owners.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2023, 17, 2; 357--363
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Some constructions of nested balanced equireplicate block designs
Autorzy:
Rai, Shivani
Banerjee, Shakti
Kageyama, Sanpei
Powiązania:
https://bibliotekanauki.pl/articles/729854.pdf
Data publikacji:
2003
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
Balanced incomplete block (BIB) design
efficiency balanced (EB) design
variance balanced (VB) design
efficiency balanced ternary (EBT)
variance balanced ternary (VBT)
efficiency balanced quaternary (EBQ)
variance balanced quaternary (VBQ)
Opis:
arious methods of constructing nested ternary and quaternary efficiency balanced and variance balanced designs are proposed by applying some repetitions of treatments in all possible pairs of treatments. In these designs sub-blocks and super-blocks may form different p-ary designs, where sub-blocks have higher efficiency as compared to super-blocks, i.e., any two elementary treatment contrasts in the sub-blocks can be measured with higher efficiency than any two elementary contrasts in the super-block structure. A comparison is shown in Table 1.
Źródło:
Discussiones Mathematicae Probability and Statistics; 2003, 23, 1; 45-68
1509-9423
Pojawia się w:
Discussiones Mathematicae Probability and Statistics
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 65

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