Rok 2009

• On the possible increasing of efficiency of ship power plant with the system combined of marine diesel engine, gas turbine and steam turbine in case of main engine cooperation with the gas turbine fed in parallel and the steam turbine

  Publikacja

  • M. Dzida
  • J. Mucharski

  - Polish Maritime Research - Rok 2009

  W pracy przedstawiono koncepcję układu kombinowanego okrętowego dużej mocy złożonego z wiodącego silnika głównego spalinowego silnika tłokowego i skojarzonych z nim turbiny gazowej mocy i układu turbiny parowej, wykorzystujących energię zawartą w spalinach wylotowych głównego silnika spalinowego. Rozpatrzono wariant układu kombinowanego, w którym główny jest silnik tłokowy skojarzony z turbiną gazową mocy i układem turbiny parowej,...

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• On the possible increasing of efficiency of ship power plant with the system combined of marine diesel engine, gas turbine and steam turbine in case of main engine cooperation with the gas turbine fed in series and the steam turbine

  Publikacja

  • M. Dzida
  • J. Girtler
  • S. Dzida

  - Polish Maritime Research - Rok 2009

  W pracy przedstawiono koncepcję układu kombinowanego okrętowego dużej mocy złożonego z wiodącego silnika głównego silnika spalinowego tłokowego oraz skojarzonych z nim turbiny gazowej mocy i układu turbiny parowej, wykorzystujących energię zawartą w spalinach wylotowych silnika spalinowego. Rozpatrywano wariant układu kombinowanego, którym turbina mocy jest zasilana szeregowo spalinami wylotowymi. Podano algorytm i obliczenia...

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• Optimization of steam cycles with respect to supercritical parameters

  Publikacja

  • M. Piwowarski

  - Polish Maritime Research - Rok 2009

  Artykuł zawiera analizę budowanych aktualnie bloków nadkrytycznych stosowanych na świecie. W pracy przeprowadzono analizę obiegów z pojedynczym oraz podwójnym przegrzewem międzystopniowym dodatkowo z regeneracyjnym podgrzewem wody zasilającej odpowiednio z sześcioma, siedmioma, ośmioma, dziewięcioma oraz dziesięcioma wymiennikami regeneracyjnymi. Obliczenia wykonywano dla różnych wartości temperatur i ciśnienia pary świeżej, różnych...

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• Optimization of transformation of measurements of ship hull blocks

  Publikacja

  • A. Kniat

  - Polish Maritime Research - Rok 2009

  Artykuł przedstawia analizę wyników pomiarów wykonanych na blokach kadłuba statku, aby ocenić ich przydatność montażową podczas ostatniej fazy montażu w suchym doku lub na pochylni. Analiza realizowana jest w dwóch krokach. Najpierw sprawdza się, czy bloki zostały wykonane z zachowaniem wymaganych tolerancji, a następnie czy istnieje możliwość połączenia ze sobą dwóch sąsiednich bloków. Ponieważ każdy blok jest mierzony w innym...

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• Parametric method for determination of motion characteristics of underwater vehicles, applicable in preliminary designing.

  Publikacja

  • J. Michalski

  - Polish Maritime Research - Rok 2009

  artykuł zawiera opis metody wstępnego projektowania autonomicznych pojazdów podwodnych (auv), przydatnej szczególnie w przypadku, gdy w założeniach projektowych stawiane są wymogi dotyczące parametrów kinematyczno-dynamicznych ruchu pojazdu. koncepcja metody zasadza się na równaniach dynamiki opisujących ruch płaski pojazdu w kierunku poziomym i pionowym, wywołanych odpowiednio napędem śrubowym lub balastem wodnym. równania ruchu...

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• Position accuracy evaluation of the modernized Polish DGPS

  Publikacja

  • M. Dziewicki
  • C. Specht

  - Polish Maritime Research - Rok 2009

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• Problems of the starting and operating of hydraulic components and systems in low ambient temperature (Part II)

  Publikacja

  • R. Jasiński

  - Polish Maritime Research - Rok 2009

  Podczas rozruchu zespołów hydraulicznych w warunkach szoku termicznego dochodzi do dynamicznej zmiany wymiarów elementów tych zespołów. Odkształcenia elementów powodują zmianę efektywnego luzu między współpracującymi elementami. Na zmiany luzu ma pływ między innymi: różnica temperatur pomiędzy gorącym olejem a zimnym zespołem hydraulicznym, natężeniem przepływu czynnika roboczego, konstrukcji zespołu, rodzaju materiału i kształtu...

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• Problems of the starting and operating of hydraulic components and systems in low ambient temperature. Part III.Methods of determining parameters for correct start-ups of hydraulic components and systems in low ambient temperatures

  Publikacja

  • R. Jasiński

  - Polish Maritime Research - Rok 2009

  W artykule przedstawiono metody: eksperymentalną, analityczną i symulacji komputerowej określania zdatności oziębionych zespołów hydraulicznych do pracy w warunkach zasilania gorącym czynnikiem roboczym powodujących tzw. szok termiczny.

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• Ring thruster - a preliminary optimisation study

  Publikacja

  • L. Matuszewski

  - Polish Maritime Research - Rok 2009

  The ring thruster is a new type of propeller, for which there is no experimental data to verify analytical design calculations. A significant feature of the ring thruster is the absence of a shaft. Propeller blades are mounted to the ring rotating inside the housing, which has the shape of a nozzle. For this reason the ring thruster is closest, with respect to both the construction and principle of operation, to the Kort nozzle...

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Rok 2022

• On the Use of Selected 4th Generation Nuclear Reactors in Marine Power Plants

  Publikacja

  • M. Drosińska-Komor
  • J. Głuch
  • Ł. Breńkacz
  • P. Ziółkowski

  - Polish Maritime Research - Rok 2022

  This article provides a review of the possibility of using different types of reactors to power ships. The analyses were carried out for three different large vessels: a container ship, a liquid gas carrier and a bulk carrier. A novelty of this work is the analysis of the proposal to adapt marine power plants to ecological requirements in shipping by replacing the conventional propulsion system based on internal combustion engines...

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• Prediction of Weld Deformations by Numerical Methods - Review

  Publikacja

  • J. Kozak

  - Polish Maritime Research - Rok 2022

  The welding process is the basic technique of joining in the shipbuilding industry. This method generates welding distortions that cause a lot of problems during the manufacturing process due to both the time and cost of straightening as well as their influence on later stages of production. Proper preparation of welding processes plays a growing role in the shipbuilding industry and the development of calculating tools is being...

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Rok 2011

• Operating and economical conditions of cooling water control for marine steam turbines condensers

  Publikacja

  • A. Błaszczyk
  • J. Głuch
  • A. Gardzilewicz

  - Polish Maritime Research - Rok 2011

  W pracy dokonano analizy ekonomicznej i eksploatacyjnej sterowania pracą pomp wody chłodzącej skraplacze turbin okrętowych. Wzięto pod uwagę cechy konstrukcyjne pomp wody chłodzącej skraplacze główne i najnowsze wyniki badań dla takich pomp w zastosowaniach lądowych. Uwagę skupiono przede wszystkim na turbinowych parowych siłowniach okrętowych.

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Rok 2016

• Operation evaluation method for marine turbine combustion engines in terms of energetics

  Publikacja

  • J. Girtler
  • M. Dzida

  - Polish Maritime Research - Rok 2016

  An evaluation proposal (quantitative determination) of an y combustion turbine engine operation has been presented , wherein the impact energy occurs at a given time due to Energy conversion. The fact has been taken into account that in this type of internal combustion engines the energy conversion occurs first in the combustion chambers and in the spaces between the blade of the turbine engine. It was assumed that in the combustion...

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• Parametrical Method for Determining Optimal Ship Carrying Capacity and Performance of Handling Equipment

  Publikacja

  • J. Michalski

  - Polish Maritime Research - Rok 2016

  The paper presents a method of evaluating the optimal value of the cargo ships deadweight and the coupled optimal value of cargo handling capacity. The method may be useful at the stage of establishing the main owners requirements concerning the ship design parameters as well as for choosing a proper second hand ship for a given transportation task. The deadweight and the capacity are determined on the basis of a selected economic...

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Rok 2017

• OPERATION OF TWO-SHAFT GAS TURBINE IN THE RANGE OF OPEN ANTI-SURGE VALVE

  Publikacja

  • M. Dzida
  • J. Frost

  - Polish Maritime Research - Rok 2017

  This paper presents experimental tests of full-scale two-shaft gas turbine in the range of open anti-surge valve (ASV). The tests were carried out in a laboratory gas- turbine test stand belonging to Department of Automation and Power Engineering , Faculty of Ocean Engineering and Ship Technology , Gdańsk University of Technology. The tests covered the start-up and low load operation of the turbine set in the range of open...

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• PHYSICAL MODELLING OF GEOTECHNICAL STRUCTURES IN PORTS AND OFFSHORE

  Publikacja

  • L. Bałachowski

  - Polish Maritime Research - Rok 2017

  The physical modelling of subsoil behaviour and soil-structure interaction is essential for the proper design of offshore structures and port infrastructure. A brief introduction to such modelling of geoengineering problems is presented and some methods and experimental devices are described. The relationships between modelling scales are given. Some examples of penetration testing results in centrifuge and calibration chamber...

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• Possibilities of heat transfer augmentation in heat exchangers with minichannels for marine applications

  Publikacja

  • D. Mikielewicz
  • J. Wajs

  - Polish Maritime Research - Rok 2017

  In the paper, new trends in development of microchannel heat exchangers are presented. The exchangers developed in this way can be applied in marine applications. Main attention was focused on heat exchangers design with reduced size of passages namely based on microchannels. In our opinion future development of high power heat exchangers will be based on networks micro heat exchangers.

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• PRELIMINARY FIELD TESTS AND LONG-TERM MONITORING AS A METHOD OF DESIGN RISK MITIGATION: A CASE STUDY OF GDAŃSK DEEPWATER CONTAINER TERMINAL

  Publikacja

  • M. Miśkiewicz
  • O. Mitrosz
  • T. Brzozowski

  - Polish Maritime Research - Rok 2017

  Appropriate risk assessment plays a fundamental role in the design. . The authors propose a possible method of design risk mitigation, which follows recommendations included in Eurocode 7. The so-called “Observational Method” (OM) can produce savings in costs and programmes on engineering projects without compromising safety. The case study presented is a complex design solution that deals with the heavy foundations of a gantry...

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• PROBLEMS OF THE STARTING AND OPERATING OF HYDRAULIC COMPONENTS AND SYSTEMS IN LOW AMBIENT TEMPERATURE (PART IV) MODELLING THE HEATING PROCESS AND DETERMINING THE SERVICEABILITY OF HYDRAULIC COMPONENTS DURING THE STARTING-UP IN LOW AMBIENT TEMPERATURE

  Publikacja

  • R. Jasiński

  - Polish Maritime Research - Rok 2017

  Designers of hydraulically driven machines and devices are obliged to ensure during design process their high service life with taking into account their operational conditions. Some of the machines may be started in low ambient temperature and even in thermal shock conditions (due to delivering hot working medium to cold components). In order to put such devices into operation appropriate investigations, including experimental...

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• PROBLEMS OF THE STARTING AND OPERATING OF HYDRAULIC COMPONENTS AND SYSTEMS IN LOW AMBIENT TEMPERATURE (PART V) METHODS ENSURING CORRECT START-UP OF HYDRAULIC COMPONENTS OF SHIP’S ONBOARD DEVICES IN LOW AMBIENT TEMPERATURES

  Publikacja

  • R. Jasiński

  - Polish Maritime Research - Rok 2017

  A large number of hydraulic devices and systems are started in low ambient temperatures. A good example of such a device is the hoisting winch on the ship. Starting hydraulic drive units in thermal shock conditions (rapid supply of hot oil to the cold unit) may lead to incorrect operation of the actuating system, for instance, due to the loss of clearance between cooperating elements. The article presents methods to prevent the...

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Rok 2010

• Operational causes of fatigue failures within the passages of gas turbine engines

  Publikacja

  • Z. Korczewski

  - Polish Maritime Research - Rok 2010

  The short profile of a fatigue wear process of gas turbine engine's constructional elements has been introduced in the article. The primary causes of a fatigue cracks formation within the mechanical system as well as within the passages of the engine have been showed. Especial attention was devoted to the low-cycle fatigue, what is associated with unsteady thermal-flow processes being worked out in the passages.The selected damages...

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• Operational problems of large power diesel engines combusting biofuels, considered togetherwith assessment of their operation

  Publikacja

  • J. Girtler
  • Z. Korczewski
  • J. Mańczak

  - Polish Maritime Research - Rok 2010

  Within this article the issue of large power self ignition engines fed with biofuels has been undertaken. The analysis focused mainly on operation problems. There has been noticed some advantages and difficulties associated with the biofuel application to self ignition engines. The research problem has been characterised and the research purposes have been proposed enabling the most profitable formation of energetic features of...

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• Preliminary designing method of external pressure vessels for sea subsurface aplications

  Publikacja

  • J. Michalski

  - Polish Maritime Research - Rok 2010

  This paper describes a unique engineering method intended for the preliminary designing of marine subsurface buoy mooring systems. The solved designing problem consists in determining geometrical parameters and selecting structural materials for a vessel of a buoyancy necessary to contain measuring instruments of a given mass, as well as its maximum dimensions and operational submersion depth. The assumed variability range of...

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Rok 2020

• OPTIMISING RIG DESIGN FOR SAILING YACHTS WITH EVOLUTIONARY MULTIOBJECTIVE ALGORITHM

  Publikacja

  • M. Pawłusik
  • R. Szłapczyński
  • A. Karczewski

  - Polish Maritime Research - Rok 2020

  The paper presents a framework for optimising a sailing yacht rig using Multi-objective Evolutionary Algorithms and for filtering obtained solutions by means of a Multi-criteria Decision Making method. A Bermuda sloop with discontinuous rig is taken under consideration as a model rig configuration. It has been decomposed into its elements and described by a set of control parameters to form a responsive model which can be used...

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• Parametric method applicable in assessing breakout force and time for lifting slender bodies from seabed

  Publikacja

  • J. Michalski

  - Polish Maritime Research - Rok 2020

  The article presents a parametric method applicable in assessing the suction force of a slender body to the seabed, and prognosing the body extrication time. Along with the body weight in water, the information on the suction force is essential for assessing the force needed to lift the object from the seabed. Based on the Foda theory and the resulting integral equation, which relates the maximum suction force with basic parameters...

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• Potential and Use of the Googlenet Ann for the Purposes of Inland Water Ships Classification

  Publikacja

  • K. Bobkowska
  • I. Bodus-olkowska Izabela

  - Polish Maritime Research - Rok 2020

  This article presents an analysis of the possibilities of using the pre-degraded GoogLeNet artificial neural network to classify inland vessels. Inland water authorities monitor the intensity of the vessels via CCTV. Such classification seems to be an improvement in their statutory tasks. The automatic classification of the inland vessels from video recording is a one of the main objectives of the Automatic Ship Recognition and...

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• SAILING ROUTE PLANNING METHOD CONSIDERING VARIOUS USER CATEGORIES

  Publikacja

  • M. Życzkowski

  - Polish Maritime Research - Rok 2020

  The article describes the methodology related to determining the multi-criteria routes for sailing ships. Details of sea area discretisation and discretisation of the description of the sailing vessel properties and manoeuvring principles are shown. User requirements were specified (for five different categories of users) and on this basis the criteria for selecting the most suitable shipping route were formulated. The presented...

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Rok 2021

• PARAMETRIC ANALYSIS OF THE EFFICIENCY OF THE COMBINED GAS-STEAM TURBINE UNIT OF A HYBRID CYCLE FOR THE FPSO VESSEL

  Publikacja

  • S. Serbin
  • N. Washchilenko
  • M. Dzida
  • J. Kowalski

  - Polish Maritime Research - Rok 2021

  A thermal diagram of the combined gas‒steam turbine unit of a hybrid cycle, which is an energy complex consisting of a base gas turbine engine with a steam turbine heat recovery circuit and a steam-injected gas turbine operating with overexpansion, is proposed. A mathematical model of a power plant has been developed, taking into consideration the features of thermodynamic processes of simple, binary, and steam-injected...

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• Performance and Emission Modelling and Simulation of Marine Diesel Engines using Publicly Available Engine Data

  Publikacja

  • M. H. Ghaemi (dawniej: M. Ghaemi)

  - Polish Maritime Research - Rok 2021

  To analyse the behaviour of marine diesel engines in unsteady states for different purposes, for example to determine the fuel consumption or emissions level, to adjust the control strategy, to manage the maintenance, etc., a goal-based mathematical model that can be easily implemented for simulation is necessary. Such a model usually requires a wide range of operating data, measured on a test stand. This is a time-consuming process...

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• PREDICTION OF SHIP MOTIONS IN IRREGULAR WAVES BASED ON RESPONSE AMPLITUDE OPERATORS EVALUATED EXPERIMENTALLY IN NOISE WAVES

  Publikacja

  • S. Bielicki

  - Polish Maritime Research - Rok 2021

  The most common methods for predicting ship roll motions in a specified sea state are direct measurements of motions in a representative irregular wave realisation (time domain) or calculations of motions from response amplitude operators (RAOs) in the frequency domain. The result of the first method is valid only for the tested sea state, whilst the second method is more flexible but less accurate. RAO-based predictions are calculated...

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Rok 2019

• Parametric method applicable in calculating breakout force and time for lifting axisymmetric objects from seabed.

  Publikacja

  • J. Michalski

  - Polish Maritime Research - Rok 2019

  The issue of calculating parameters for lifting objects of axisymmetric shapes from the seabed is studied. The article presents the results of numerical simulation examination of the equation formulated by Foda for the force needed to extricate the object from the seabed depending on soil and water parameters, extrication speed, and object diameter. The simulations were performed within the range of parameters characteristic for...

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• Polish DGPS System: 1995–2017 – Study of Positioning Accuracy

  Publikacja

  • C. Specht
  • L. Smolarek
  • J. Pawelski
  • M. Specht
  • P. S. Dąbrowski

  - Polish Maritime Research - Rok 2019

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• REVIEW OF WEATHER FORECAST SERVICES FOR SHIP ROUTING PURPOSES

  Publikacja

  • M. Życzkowski
  • J. Szłapczyńska
  • R. Szłapczyński

  - Polish Maritime Research - Rok 2019

  Weather data is nowadays used in a variety of navigational and ocean engineering research problems: from the obvious ones like voyage planning and routing of sea-going vessels, through the analysis of stability-related phenomena, to detailed modelling of ships’ manoeuvrability for collision avoidance purposes. Apart from that, weather forecasts are essential for passenger cruises and fishing vessels that want to avoid the risk...

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• Robust Model Predictive Control for Autonomous Underwater Vehicle – Manipulator System with Fuzzy Compensator

  Publikacja

  • H. Nejatbakhsh Esfahani

  - Polish Maritime Research - Rok 2019

  This paper proposes an improved Model Predictive Control (MPC) approach including a fuzzy compensator in order to track desired trajectories of autonomous Underwater Vehicle Manipulator Systems (UVMS). The tracking performance can be affected by robot dynamical model uncertainties and applied external disturbances. Nevertheless, the MPC as a known proficient nonlinear control approach should be improved by the uncertainty estimator...

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• Robust Model Predictive Control for Autonomous Underwater Vehicle–Manipulator System with Fuzzy Compensator

  Publikacja

  • H. Nejatbakhsh Esfahani

  - Polish Maritime Research - Rok 2019

  This paper proposes an improved Model Predictive Control (MPC) approach including a fuzzy compensator in order totrack desired trajectories of autonomous Underwater Vehicle Manipulator Systems (UVMS). The tracking performancecan be affected by robot dynamical model uncertainties and applied external disturbances. Nevertheless, the MPCas a known proficient nonlinear control approach should be improved by the...

Rok 2014

• Parametric method for evaluating optimal ship deadweight

  Publikacja

  • J. Michalski

  - Polish Maritime Research - Rok 2014

  The paper presents a method of choosing the optimal value of the cargo ships deadweight. The method may be useful at the stage of establishing the main owners requirements concerning the ship design parameters as well as for choosing a proper ship for a given transportation task. The deadweight is determined on the basis of a selected economic measure of the transport effectiveness of ship – the Required Freight Rate (RFR). The...

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• Problems of modelling toxic compounds emitted by a marine internal combustion engine in unsteady states

  Publikacja

  • J. Rudnicki
  • R. Zadrąg

  - Polish Maritime Research - Rok 2014

  Contemporary engine tests are performed based on the theory of experiment. The available versions of programmes used for analysing experimental data make frequent use of the multiple regression model, which enables examining effects and interactions between input model parameters and a single output variable. The use of multi-equation models provides more freedom in analysing the measured results, as those models enable simultaneous...

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Rok 2015

• Problems of Determination of Welding Angular Distortions of T-fillet Joints in Ship Hull Structures

  Publikacja

  • J. Kozak
  • J. Kowalski

  - Polish Maritime Research - Rok 2015

  Ship hull structure elements are in majority joined by welding. Welding distortions can cause a lot of problems during the manufacturing process. In the literature it is proposed wide spectrum of suggestions for a correct estimation of welding deformation in particular angular deformation in the fillet welded T joint. In the work verification of selected methods is proposed basing upon of the results of the laboratory measurements....

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Rok 2006

• Problems of strength modelling of steel sandwich panels under in-plate load

  Publikacja

  • J. Kozak

  - Polish Maritime Research - Rok 2006

  W pracy omówiono zagadnienia wytrzymałości statycznej stalowych paneli typu sandwich spawanych laserowo. Omówiono charakterystyki sztywności podczas zginania, przedstawiono zachowanie pod obciążeniem równomiernie rozłożonym a także sposób niszczenia pod obciążeniem ściskającym. Omówiono możliwości stosowania takich konstrukcji na podstawie wniosków z badań.

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• Sandwich panels in shipbuilding

  Publikacja

  • B. Metschkow

  - Polish Maritime Research - Rok 2006

  W publikacji przedstawiono charakterystykę i podstawowe własności nowego tworzywa dla konstrukcji statku jakim są stalowe, spawane laserowo panele typu sandwich. Omówiono podstawowe zalety nowego typu konstrukcji, przedstawiono problemy wynikające z jej stosowania.

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• Scale effects in cavitation experiments with marine propeller models

  Publikacja

  • J. Szantyr

  - Polish Maritime Research - Rok 2006

  Praca zawiera przegląd specyficznych efektów skali występujących w badaniach kawitacyjnych modeli śrub okrętowych oraz analizę ich wpływu na prognozowane osiągi śrub okrętowych w skali rzeczywistej.

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Rok 2008

• Problems of the starting and operating of hydraulic components and systems in low ambient temperature (Part I)

  Publikacja

  • R. Jasiński

  - Polish Maritime Research - Rok 2008

  W artykule przestawnie są problemy rozruchu i działania zespołów i układów hydraulicznych w niskich temperaturach otoczenia. Z tych powodów autor przebadał hydrauliczne zespoły i układy w warunkach szoku termicznego (oziębione zespoły zasilano gorącym czynnikiem roboczym). Określono parametry rozruchu w tych warunkach kilku zespołów oraz układów hydraulicznych, przy których ich eksploatacja jest bezpieczna. Badania eksperymentalne...

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• Research on a control system based on stepping motor for ship's controllable pitch propellers

  Publikacja

  • C. Dymarski

  - Polish Maritime Research - Rok 2008

  W artykule przedstawiono opis stanowiska laboratoryjnego do badania serwomechanizmów okrętowych śrub nastawnych małej mocy oraz opracowany układ sterowania zdalnego śruby z wykorzystaniem elektrycznego silnika krokowego. Przedstawiono także wyniki pierwszej serii badań układu sterowania śruby nieobciążonej dla skokowego zadawanych wartości skoku śruby przy dwóch różnych prędkościach obrotowych silnika krokowego.

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• Results of acoustic emission tests of corrosion protection degree of ship steel tanks covered by means of protective coatings (Phase I)

  Publikacja

  • H. Bugłacki
  • P. Eichert

  - Polish Maritime Research - Rok 2008

  This paper presents methods and results of the 1st series of tests of acoustic emission (AE) signals, aimed at assessing degree of corrosion protection of a tank made of hull structural steel, protected by means of a protective coating combined from polyurethane layer and concrete filler. The tests were carried outin compliance with a method specially elaborated for application to the work in question. In the method were used requirements...

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Rok 2012

• Processing data on sea bottom structure obtained by means of the parametric sounding

  Publikacja

  • E. Kozaczka
  • G. Grelowska
  • S. Kozaczka
  • W. Szymczak

  - Polish Maritime Research - Rok 2012

  The aim of the paper is to analyze data obtained during sounding the Gdansk Bay sea bed by means of the parametric echo-sounder. The accuracy of the sea bottom structure investigation needs correct configuration of research equipment and proper calibration of peripheral devices (GPS, heading sensor, MRU-Z motion sensor and navigation instruments which provide necessary data to bathymetrical measurement system, enabling its work...

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Rok 2018

• Propagation of Ship-Generated Noise in Shallow Sea

  Publikacja

  • E. Kozaczka
  • G. Grelowska

  - Polish Maritime Research - Rok 2018

  Contamination of sea environment by noise and any energy radiated to water constitutes today a problem to which more and more attention is paid, in view, a.o., of consequences of an impact of these factors onto marine fauna. European Union has introduced a directive by which EU countries are made responsible to undertake efforts aimed at reaching a good envirenmental status of European seas by 2020. A main source of underwater...

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Rok 2023

• Quantumness in Diagnostics of Marine Internal Combustion Engines and Other Ship Power Plant Machines

  Publikacja

  • J. Rudnicki
  • J. Girtler

  - Polish Maritime Research - Rok 2023

  The article provides proof that the diagnostics of marine internal combustion engines and other ship power plant machines should take into account the randomness and unpredictability of certain events, such as wear, damage, the variations of mechanical and thermal loads, etc., which take place during machine operation. In the article, the energy E, like the other forms (methods) that it can be converted into (heat and work), is...

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• Reduction of CO2 Emissions from Offshore Combined Cycle Diesel Engine-Steam Turbine Power Plant Powered by Alternative Fuels

  Publikacja

  • W. Olszewski
  • M. Dzida
  • V. G. Nguyen
  • D. N. Cao

  - Polish Maritime Research - Rok 2023

  Diverse forms of environmental pollution arise with the introduction of materials or energy that exert adverse effects on human health, climate patterns, ecosystems, and beyond. Rigorous emission regulations for gases resulting from fuel combustion are being enforced by the European Union and the International Maritime Organization (IMO), directed at maritime sectors to mitigate emissions of SOx, NOx, and CO2. The IMO envisions...

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• ROLE OF GREEN LOGISTICS IN THE CONSTRUCTION OF SUSTAINABLE SUPPLY CHAINS

  Publikacja

  • N. D. K. Pham
  • G. H. Dinh
  • H. T. Pham
  • J. Kozak
  • P. N. Hoang

  - Polish Maritime Research - Rok 2023

  The global supply chain has been growing strongly in recent years. This development brings many benefits to the economy, society, and human resources in each country but also causes a large number of concerns related to the environment since traditional logistics activities in the supply chain have been releasing significant amount of emissions. For that reason, many solutions have been proposed to deal with these environmental...

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Rok 2007

• Ring thruster - a preliminary optimisation study of ferrofluid seal and propeller

  Publikacja

  • L. Matuszewski
  • Z. Szydło

  - Polish Maritime Research - Rok 2007

  The article reports the course of preliminary examination of a ferrofluid seal applied in liquid environment.A newly built research rig is described, and results of pressure tests performed for different shaft rotationsare discussed. Other studies carried out in the past only referred to the gas environment, while the presentexamination aims at finding an answer to the question whether magnetic liquids can be successfully used...

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