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Wyszukujesz frazę "design efficiency" wg kryterium: Temat


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
Tytuł:
An analysis of the efficiency of design methods
Autorzy:
Rogalska, M.
Słowik, M.
Powiązania:
https://bibliotekanauki.pl/articles/348495.pdf
Data publikacji:
2016
Wydawca:
Akademia Wojsk Lądowych imienia generała Tadeusza Kościuszki
Tematy:
reinforced concrete members
load carrying capacity
statistical analysis
standard code
efficiency of design methods
Opis:
The objective of the paper is to analyze the efficiency of design methods proposed in different codes according to the load carrying capacity of concrete structures. In particular, three standard recommendations have been considered: the ACI 318 shear design model, the equation by Eurocode 2 and a new design procedure from Model Code 2010. In the paper the flexural concrete members, which are reinforced longitudinally but without transverse reinforcement, are considered. The design values of the load carrying capacity of such members obtained from these three codes were compared with experimental results. An advanced statistical analysis has been applied to predict of dependent variable (load carrying capacity of tested beams) and to perform a comparative analysis. On the basis of the analysis conclusions have been drawn according to the fit between the design methods and the test data.
Źródło:
Zeszyty Naukowe / Wyższa Szkoła Oficerska Wojsk Lądowych im. gen. T. Kościuszki; 2016, 4; 146-160
1731-8157
Pojawia się w:
Zeszyty Naukowe / Wyższa Szkoła Oficerska Wojsk Lądowych im. gen. T. Kościuszki
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Uwagi do eksploatacyjnego wskaźnika efektywności energetycznej statku
Remarks about ship’s energy efficiency operational indicator
Autorzy:
Herdzik, J.
Powiązania:
https://bibliotekanauki.pl/articles/310426.pdf
Data publikacji:
2017
Wydawca:
Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:
emisja CO2
współczynnik efektywności energetycznej EEDI
statek
CO2 emission
Energy Efficiency Design Index (EEDI)
ship
Opis:
W artykule omówiono powody, dla których wyznacza się eksploatacyjny wskaźnik efektywności energetycznej statku. Podano jego definicję i określono, jakie dane wejściowe muszą być znane, aby można go było wyliczyć. Wskazano, jaki aspekt bierze się pod uwagę, przy wyznaczaniu tego wskaźnika. Podano możliwości obniżenia wartości tego wskaźnika, uzasadniając, które z nich mogą zostać zrealizowane w warunkach eksploatacji statku. Zgłoszone uwagi są oceną wartości porównawczej wskaźnika EEOI w stosunku do oszacowanej wartości tego wskaźnika uzyskanego w fazie projektowej statku EEDI. Ponadto są oceną jakości wskaźnika EEOI – tzn. jaką przedstawia wartość informacyjną.
Paper discussed the reasons for assigning the Energy Efficiency Operational Indicator (EEOI) for ships. The definition of EEOI was determined and needed data for its calculating. It was indicated the aspects taken into consideration during its calculating. The possibilities for decreasing value of the indicator were passed with justification which ones may be realized during ship operation and exploitation process. Notified remarks are the assessment for comparison the EEOI with EEDI (Energy Efficiency Design Index). Additionally they are the assessment of its quality and what is the information value of EEOI.
Źródło:
Autobusy : technika, eksploatacja, systemy transportowe; 2017, 18, 6; 209-213, CD
1509-5878
2450-7725
Pojawia się w:
Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza eksploatacyjnego wskaźnika efektywności energetycznej statku w aspekcie ekonomicznym i ekologicznym
Analysis of the Energy Efficiency Operational Indicator in Economic and Ecological Aspect
Autorzy:
Wysocki, J.
Powiązania:
https://bibliotekanauki.pl/articles/341522.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Morski w Gdyni. Wydawnictwo Uniwersytetu Morskiego w Gdyni
Tematy:
eksploatacyjny wskaźnik efektywności energetycznej
konstrukcyjny wskaźnik efektywności energetycznej
plan zarządzania efektywnością energetyczną statku
energy efficiency operational indicator
energy efficiency design index
energy efficiency management plan
Opis:
Artykuł przedstawia wybrane narzędzia do poprawy i oszacowania efektywności energetycznej statku oraz analizę eksploatacyjnego wskaźnika efektywności energetycznej statku (EEOI).Głównym zadaniem rozpatrywanych narzędzi jest ograniczenie emisji gazów cieplarnianych, a w szczególności dwutlenku węgla, do atmosfery podczas eksploatacji statku. Celem przeprowadzonej analizy było wykazanie możliwości stosowania EEOI w czasie eksploatacji statku.
This article presents selected tools for improving and estimating vessel energy efficiency and analysis of energy efficiency operational indicator EEOI. The main task of the tools under consideration is to reduce greenhouse gases emissions and, in particular, emission into the atmosphere during ship operation. The purpose of the study was to demonstrate the applicability of the EEOI during ship operation.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Gdyni; 2017, 100; 200-213
1644-1818
2451-2486
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Gdyni
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Study on the Propulsion Performance in the Actual Sea by means of Full-scale Experiments
Autorzy:
Kayano, J.
Yabuki, N.
Sasaki, N.
Hiwatashi, R.
Powiązania:
https://bibliotekanauki.pl/articles/116354.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Propulsion Performance
Propulsion
mechanical engineering
Energy Efficiency Design Index (EEDI)
Ship Energy Efficiency Management Plan (SEEMP)
Energy Efficiency Operational Indicator (EEOI)
Self Propulsion Factors
Power Curves
Opis:
The IMO has adopted Energy Efficiency Design Index (EEDI), Ship Energy Efficiency Management Plan (SEEMP) and Energy Efficiency Operational Indicator (EEOI) in order to reduce GHG emissions from international shipping. And, the shipping industry is required to develop and improve the energy saving ship operation technologies to meet the above IMO guideline. The weather routing is one of the energy saving navigation technologies and widely adopted by oceangoing merchant ships. The effectiveness of the weather routing mainly depends on the accuracy of weather forecast data and the ship’s propulsion performance prediction. The propulsion performance in the actual sea is usually predicted using the Self Propulsion Factors obtained by model tests. It is necessary to understand the propulsion performance characteristics in the actual sea conditions for the improvement of propulsion performance prediction. From the above points of view, the authors performed full‐scale experiments using a training ship in order to investigate the propulsion performance characteristics in the actual sea. This paper describes the analysis results on the characteristics of Power Curves and Self Propulsion Factors under various weather and sea conditions.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2013, 7, 4; 521-526
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Projektowy wskaźnik efektywności energetycznej (EEDI) – czy jest możliwa redukcja emisji CO2 na statkach morskich
Energy efficiency design index (EEDI) – is it possible to reduce CO2 emission on vessels
Autorzy:
Szelangiewicz, T.
Żelazny, K.
Powiązania:
https://bibliotekanauki.pl/articles/254355.pdf
Data publikacji:
2012
Wydawca:
Instytut Naukowo-Wydawniczy TTS
Tematy:
projektowy wskaźnik efektywności energetycznej
EEDI
emisja CO2
statki morskie
energy efficiency design index
CO2 emission
vessels
Opis:
Od 2013 roku ma obowiązywać projektowy wskaźnik efektywności energetycznej (EEDI) dla nowych statków. Statki spełniające normy emisji CO2 będą uzyskiwały certyfikat energetyczny dopuszczające je do eksploatacji. W artykule przedstawiono aktualną postać wskaźnika EEDI, procedurę przyznawania Certyfikatu oraz planowaną na następne lata redukcję emisji CO2. Większość obecnie eksploatowanych statków spełnia normy emisji CO2 ustalone na 2012 r. ale dalsze obniżanie tych norm wymagać będzie poważnych zmian w projektowaniu i budowie nowych statków. Przedstawione zostały potencjalne możliwości obniżania emisji CO2 oraz przykładowe obliczenia wpływu tych możliwości na obniżenie wartości EEDI dla statku transportowego.
Since 2013 onwards EEDI for newly built ships will become mandatory. Ships meeting the CO2 emission standards will be granted International Energy Certificate necessary for exploitation The article presents the current version of EEDI, certification procedure as well as reduction in CO2 emission planned for subsequent years. The majority of ships currently in service, meet the CO2 emission standards for 2012, however further reduction in these standards will require major changes in ship design. The article presents possible ways to reduce CO2 emissions as well as sample calculations to estimate EEDI value reduction for a transport ship.
Źródło:
TTS Technika Transportu Szynowego; 2012, 9; 485-493, CD
1232-3829
2543-5728
Pojawia się w:
TTS Technika Transportu Szynowego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design Vulnerability as the Key Element of the Logistics Efficiency of a Product
Autorzy:
Bielecki, Maciej Mieczysław
Madej, Mateusz
Skoczylas, Aleksandra
Powiązania:
https://bibliotekanauki.pl/articles/504309.pdf
Data publikacji:
2014
Wydawca:
Międzynarodowa Wyższa Szkoła Logistyki i Transportu
Tematy:
design
vulnerability
efficiency
product
Opis:
The article highlights the importance of the influence a product itself has on the broadly understood logistics-related issues, referred to as the logistical efficiency of a product. It constitutes the foundation for the concept of design vulnerability of a product, along with its determinants. The paper shows the impact these determinants have on logistics processes on selected examples from the market. The authors of the article also suggest what actions might be undertaken in the strategic and operational sphere of the company logistics, depending on the design vulnerability of a product.
Źródło:
Logistics and Transport; 2014, 21, 1; 5-12
1734-2015
Pojawia się w:
Logistics and Transport
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effectiveness of current technology in GHG reduction – A literature survey
Autorzy:
Klakeel, T.
Anantharaman, M.
Islam, R.
Garaniya, V.
Powiązania:
https://bibliotekanauki.pl/articles/24201381.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
effectiveness evaluation
greenhouse gas
literature review
marine environment
IMO guidelines
hydrogen fuel cell
heavy fuel oil
energy efficiency design index
Opis:
In 2018 during the 72nd session of the Maritime Environmental Protection Committee (MEPC) IMO adopted its initial strategy for the reduction of greenhouse gas emissions (GHG) from the ships to meet the Paris Agreement Goals, 2015. This is considered as a major milestone in formulizing a clear strategy by IMO towards its objective of reducing the global GHG emissions from the ships. The strategy had two primary objectives: the first was to decrease total annual GHG emissions by at least 50% by 2050 compared to 2008 levels. The second objective was to promote the phasing out of GHG emissions entirely. In 2020, the International Maritime Organization (IMO) conducted a study which revealed that greenhouse gas (GHG) emissions from shipping had increased by 9.6%. The rise in global maritime trade was identified as the main factor behind this increase. IMO's 2020 study also concluded that reducing GHG emissions by focusing only on energy-saving technologies and ship speed reduction would not be enough to meet the IMO's 2050 GHG reduction target. Therefore, greater attention needs to be given to the use of low-carbon alternative fuels. To understand the effectiveness of currently available technologies in reducing GHG emissions from ships, a literature survey was conducted in this study. The survey examined a range of related articles published between 2018 and 2022. This study aimed to identify the current stage and the quantity of literature available on various technologies and, more importantly, serve as a decision-making support tool for selecting a technology under specific circumstances in a quantitative manner. The technologies were divided into four groups: those that utilize fossil fuels, those that use renewable energy, those that use fuel cells, and those that use low-carbon or alternative fuels. The literature survey was conducted using Web of Science (WoS) and Google Scholar. The results of this study will also help to identify clear research gaps in comparing the effectiveness of various available technologies to reduce GHG emissions. Ultimately, the aim is to develop a comprehensive strategy that can be used to reduce GHG emissions from shipping and contribute to the global fight against climate change.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2023, 17, 1; 171--176
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A unified terminology in block designs
Autorzy:
Caliński, Tadeusz
Kageyama, Sanpei
Powiązania:
https://bibliotekanauki.pl/articles/729764.pdf
Data publikacji:
2004
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
block design
PEB design
efficiency factor
basic contrast
Opis:
Partially efficiency balanced (PEB) designs with m efficiency classes have been defined by Puri and Nigam [15] as block designs which have simple analysis and, if properly used, allow the important contrasts to be estimated with desired efficiency. Such designs can be made available in varying replications and/or unequal block sizes. However, any block design is a PEB design with m efficiency classes for some m < v, where v is the number of treatments in the design. So the term "PEB" itself is not much informative in a statistical sense. More information may be added to this term. In this paper, a unified terminology is suggested, aimed at giving more statistical meaning to the PEB designs, which may or may not be connected. The paper is essentially based on our recent books "BLOCK DESIGNS: A Randomization Approach", Springer Lecture Notes in Statistics, Vol. 150 (2000), Vol. 170 (2003), with some new additions.
Źródło:
Discussiones Mathematicae Probability and Statistics; 2004, 24, 1; 127-145
1509-9423
Pojawia się w:
Discussiones Mathematicae Probability and Statistics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation study on the Influence of EEDI requirements to shiphandling in heavy weather
Autorzy:
Nishizaki, C.
Okazaki, T.
Yabuki, H.
Yoshimura, Y.
Powiązania:
https://bibliotekanauki.pl/articles/116458.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
ship handling
Energy Efficiency Design Index (EEDI)
CO2
heavy weather
main engine
Energy Efficiency Operational Index (EEOI)
Maritime Environmental Protection Committee (MEPC)
Pure Car Carrier (PCC)
Opis:
In order to reduce the CO2 emission from ships, International Maritime Organization executes the restriction of Energy Efficiency Design Index (EEDI) which limits amount of CO2 when freight of one ton is carried at one mile. Although the realization of higher efficiency of main engine without reduction of engine output is the best solution, it might be impossible. To comply with the EEDI requirements, it is assumed that the ship’s engine power becomes smaller than the existing ship by means of improving the ship propulsive efficiency. However, shiphandling in rough seas is expected to become difficult when the engine power is reduced. In this paper it is shown that the influence of the degraded main engine exerts on the safety of shiphandling in heavy weather based on the simulation study. In these experiments, both the simulation model that decreased engine power corresponding to EEDI requirement and that with the conventional engine power were tested, and masters in active service maneuvered the test ships in the rough seas.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2019, 13, 4; 855-860
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Efficiency analysis in the design of walking machines
Autorzy:
Zielińska, T.
Powiązania:
https://bibliotekanauki.pl/articles/281568.pdf
Data publikacji:
2000
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
energy efficiency
walking machines
design methods
Opis:
The problem of energy efficiency in the design of walking machine is discussed in this paper. Attention is paid to the calculation of motor powers, gear ratios and to the choice of energetically efficient leg configuration. The motor power is evaluated bassing on the knowledge about the range of reaction forces during the hexapod movement, assuming that the body moves at the constant velocity, maintaining the heigt of the centre of gravity above the ground what is expected of hexapods. The results presented were applied to the walking machine being currently built.
Analiza efektywności w projektowaniu maszyn kroczących. W artykule przedstawiono problem efektywności energetycznej, jaki musi być uwzględniony przy projektowaniu maszyny kroczącej. Uwagę poświęcono zagadnieniu doboru mocy silników, doboru przekładni oraz wyborowi energetycznie efektywnej konfoguracji nóg. Moc silników została wyznaczona na podstawie znajomości rozkładu sił reakcji w czasie chodu maszyny kroczącej, przy ruchu ze stałą prędkością i przy stałej wysokości środka ciężkości maszyny nad podłożem. Przyjęte założenia są typowe dlachodu maszyn sześcionożnych. Omówione wyniki zostały zastosowane przy projektowaniu aktualnie budowanej maszyny kroczącej
Źródło:
Journal of Theoretical and Applied Mechanics; 2000, 38, 3; 693-708
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An alternative approach for dissemination of mass unit after the new definition of the kilogram
Autorzy:
Vâlcu, Adriana
Powiązania:
https://bibliotekanauki.pl/articles/2051844.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
new definition of the kilogram
efficiency of the weighing design
subdivision method
multiplication method
mass dissemination
Opis:
The paper proposes an alternative approach to the dissemination of the mass unit in the context of the new definition of the kilogram. Considering the fact that redefinition allows mass to be directly realized at any value, the paper presents a model of the dissemination of mass which can be used for diferent series in grams, where the measurements are performed in the downward direction, but using 1 g as the reference standard (whose mass value is assumed to be determined after the redefinition using the capacitive or electrostatic techniques). The subdivision method presented (suitable for 1 weights) has as its starting point the approach used by Mihailov-Romanowski for the calibration of series in kilograms which uses an orthogonal system of equations. Thus, according to this method, a solution for obtaining the orthogonality of a system can be the use as defining standard of the ratio between the mass having the highest nominal value in the set and the standard (unit). The results obtained for a set of weights from 10 to 1 g using the subdivision method, in accordance with the Mihailov-Romanowski principle, are validated with those obtained with the multiplication method, where the measurements start from 1 to 10 g, as in the case of the kilogram series. The mass values obtained with both methods are equal, while the estimated uncertainties are slightly diferent, yet insignificant. The results obtained previously for the same sequence of weights using the traditional dissemination method, where the 1 kg standard is used as reference, are also presented in the paper. The results show that only three weights out of six have a mass value insignificantly diferent by 1 × 10-4 mg compared to those obtained with the methods presented in this article, but, in terms of uncertainty, there are some diferences. The way of disseminating the mass unit presented in this article can be extended to other diferent sequences of nominal values such as: (5 . . . 1) g, (20 . . . 1) g, (50 . . . 1) g or (500 . . . 100) g if the reference standard is 100 g.
Źródło:
Metrology and Measurement Systems; 2022, 29, 1; 3-16
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Technical and operational energy efficiency measures for ships
Techniczne i operacyjne środki efektywności energetycznej dla statków morskich
Autorzy:
Pyć, Dorota
Powiązania:
https://bibliotekanauki.pl/articles/1954763.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
MARPOL
GHG
Energy Efficiency Design Index (EEDI)
Ship Energy Efficiency Management Plan (SEEMP)
sustainable shipping
projektowy wskaźnik efektywności energetycznej – EEDI
plan efektywności energetycznej – SEEMP
zrównoważona żegluga morska
Nauki Humanistyczne i Społeczne
Opis:
Techniczne i operacyjne środki efektywności energetycznej dla statków morskich takie, jak projektowy wskaźnik efektywności energetycznej (EEDI) oraz plan zarządzania efektywności energetyczną statku (SEEMP), mają na celu poprawę efektywności energetycznej międzynarodowej żeglugi morskiej. Badania pokazują, że bezwzględny poziom emisji z międzynarodowej żeglugi morskiej wzrośnie pomimo ich obowiązkowego stosowania. Z tego względu istotna jest ocena wpływu w zakresie skuteczności stosowania obowiązkowych środków efektywności na przyszłe emisje. W Międzynarodowej Organizacji Morskiej opracowywane są kolejne środki w celu kontroli emisji ze statków, w tym w szczególności gazów cieplarnianych (GHG), przyczyniających się do zmian klimatu. W styczniu 2019 r. wprowadzono system gromadzenia danych o zużyciu paliwa przez statki (Ship Fuel Oil Consumption Database). Środki efektywności energetycznej wypracowane przez Komitet Ochrony Środowiska Morskiego IMO, początkowo jako fakultatywne, następnie jako obowiązkowe, wykazują silny charakter prewencyjny. Obligatoryjne stosowanie środków efektywności energetycznej przez statki morskie, jak i rozwój polityki zarządzania efektywnością energetyczną przez przedsiębiorstwa żeglugowe, przyczynia się do ochrony klimatu oraz adaptacji do zmian klimatu.
Technical and operational energy efficiency measures for ships, such as the energy efficiency design index (EEDI) and ship energy efficiency management plan (SEEMP), aim to improve the energy efficiency of international shipping. Studies show that absolute emissions from international shipping will increase despite their mandatory application. For this reason, it is important to assess the impact on the effectiveness of the application of mandatory efficiency measures on future emissions. Further measures are being developed at the International Maritime Organization to control emissions from ships, in particular greenhouse gases (GHG) that contribute to climate change. In January 2019, a system of collecting fuel consumption data by ships (Ship Fuel Oil Consumption Database) was introduced.Energy efficiency measures promoted by the IMO Maritime Environment Protection Committee, initially as facultative, then as mandatory, show strong preventive character. The mandatory use of energy efficiency measures by ships as well as the development of energy efficiency management policies by shipping companies contributes to climate protection and adaptation to climate change
Źródło:
Prawo Morskie; 2019, XXXVII; 105-117
0860-7338
Pojawia się w:
Prawo Morskie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of waste heat recovery systems on energy efficiency improvement of a heavy-duty diesel engine
Autorzy:
Ma, Z.
Chen, H.
Zhang, Y.
Powiązania:
https://bibliotekanauki.pl/articles/240819.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
energy efficiency design index
energy efficiency operational indicator
waste heat recovery system
performance analysis
reduction factor
wskaźnik efektywności energetycznej
wskaźniki eksploatacyjny efektywności energetycznej
system odzysku ciepła odpadowego
analiza wydajności
współczynnik redukcyjny
Opis:
The increase of ship’s energy utilization efficiency and the reduction of greenhouse gas emissions have been high lightened in recent years and have become an increasingly important subject for ship designers and owners. The International Maritime Organization (IMO) is seeking measures to reduce the CO2 emissions from ships, and their proposed energy efficiency design index (EEDI) and energy efficiency operational indicator (EEOI) aim at ensuring that future vessels will be more efficient. Waste heat recovery can be employed not only to improve energy utilization efficiency but also to reduce greenhouse gas emissions. In this paper, a typical conceptual large container ship employing a low speed marine diesel engine as the main propulsion machinery is introduced and three possible types of waste heat recovery systems are designed. To calculate the EEDI and EEOI of the given large container ship, two software packages are developed. From the viewpoint of operation and maintenance, lowering the ship speed and improving container load rate can greatly reduce EEOI and further reduce total fuel consumption. Although the large container ship itself can reach the IMO requirements of EEDI at the first stage with a reduction factor 10% under the reference line value, the proposed waste heat recovery systems can improve the ship EEDI reduction factor to 20% under the reference line value.
Źródło:
Archives of Thermodynamics; 2017, 38, 3; 63-75
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Man-algorithm Cooperation Intelligent Design of Clothing Products in Multi Links
Autorzy:
Han, Chen
Lei, Shen
Shaogeng, Zhang
Mingming, Wang
Ying, Tang
Powiązania:
https://bibliotekanauki.pl/articles/2056307.pdf
Data publikacji:
2022
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:
intelligent algorithm
cooperation
clothing design
machine learning
efficiency
Opis:
The changes in technology have led to a synchronous change in the clothing design method, as well as media and artistic aesthetics in the same period. The intelligence algorithm is constantly increasing its participation in development and production in the clothing industry. In this study, a variety of intelligent algorithms, including the parameterised numer state algorithm, Generative Adversarial Networks, and style transfer were introduced into the multi-links of clothing product design and development, such as clothing shape, print pattern, texture craft, product vision, and so on. Then, an innovative clothing design method based on the cooperation of the intelligent algorithm and various human functional roles was constructed. The method improves the efficiency of the multiple links of clothing design, such as generating 10000 printing patterns every 72.12 seconds, and completing the migration of 92.7 frames of the garment process style every second. To a certain extent, this study realizes the scale economy of clothing design and reduces its marginal cost through the unlimited computing power brought about by Moore’s law of digital technology, which provides a reference for the exploration of clothing design in the era of industry 4.0.
Źródło:
Fibres & Textiles in Eastern Europe; 2022, 1 (151); 59--66
1230-3666
2300-7354
Pojawia się w:
Fibres & Textiles in Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Examination of samples public buildings according to energy efficient
Badanie obiektów użyteczności publicznej w aspekcie ich sprawności energetycznej
Autorzy:
Alagöz, Meryem
Sarıcıoğlu, Pelin
Woloszyn, Marek
Powiązania:
https://bibliotekanauki.pl/articles/370006.pdf
Data publikacji:
2019
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
energy efficiency
ecotect software
building design
public buildings
Opis:
Public utility buildings are formal, structurally and functionally complex entities. In order to demonstrate energy-related defects of building designs developed by students, the conduct of analyses was proposed. The completed designs of public utility buildings were examined with regard to the energy efficiency of the solutions they feature through the application of the following program: Ecotect software was sufficient. Thus, it has been reached that how can be designed public utility buildings according to energy efficiency. Paying more attention to the energy aspect must change the previously designed architectural design of buildings.
Źródło:
Przestrzeń i Forma; 2019, 38; 111-122
1895-3247
2391-7725
Pojawia się w:
Przestrzeń i Forma
Dostawca treści:
Biblioteka Nauki
Artykuł

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