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1
Content available remote Influence of adjustment of gas turbine controller on ship propulsion system behaviour in rough sea conditions. Part 1. The dynamic model of propulsion system
100%
Dzida M.
Polish Maritime Research
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2003
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tom nr 4
14-17
EN
The paper presents a dynamic model of ship propulsion system, elaborated with the use of the stiff finite element method. The ship propulsion system consisted of two gas turbines driving - through toothed gear - controllable pitch propeller, was used to analysis. In the simulation model disturbances both from setting of propeller shaft's angular speed and of propeller pitch during the system's operation in rough sea conditions, were accounted for.
2
Influence of adjustment of gas turbine controller on ship propulsion system behaviour in rough sea conditions. Part 1. The dynamic model of propulsion system
100%
Dzida M.
|
|
nr 4
3
Content available remote Simulation of ship propulsion gas turbine dynamics -- an educational laboratory model
100%
Dzida M.
|
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tom nr 4
6-10
EN
The paper presents mathematical model of an aircraft two-shaft gas turbine which operates on the basis of a simple open cycle. The model was used to simulate dynamic characteristics of the gas turbine. The simulation language Simulink, a part of Matlab package, was applied for educational purposes.
4
Content available Influence of gas turbine controller adjustment on ship propulsion system behavior in rough sea conditions. Part 2. The simulation investigations
100%
Dzida M.
|
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tom nr 1
15-23
EN
The paper presents simulation investigations of influence of gas turbine controller adjuŹstment on ship propulsion system operating in heavy sea conditions, based on the model presented in Part 1 of the paper. The ship propulsion system with two gas turbines driŹving - through mechanical gear - ship controllable pitch propeller, described in Part 1, was used to analysis. The harmonic disturbances due to sea waves with selected frequencies were used as input function in computing the system’s amplitude characteristics at different settings of P and PD controllers.
5
Application of the Flory’s Model for Description Thermal Pressure Coefficient and Internal Pressure of the Liquid Mixtures
100%
Dzida M.
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2006
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tom Vol. 27
343-351
EN
The Flory’s model has been applied for description thermal pressure coefficient and internal pressure of six mixtures: cyclohexane + benzene, cyclohexane + tetrachloromethane, ethylbenzene + n-octane, ethylbenzene + n-decane, n-hexane + cyclohexane and n-hexane + perfluorohexane. The excess thermal pressure coefficient and excess internal pressure has been calculated from the model values of thermal pressure coefficient and internal pressure. The thermodynamically correct formulas of these excesses have been used. Two mixing rules for characteristic pressure of mixture have been applied. A good agreement between calculated and experimental values has been obtained.
6
Simulation of ship propulsion gas turbine dynamics - an educational laboratory model
100%
Dzida M.
|
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tom 06
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nr 4
7
Content available An analysis 0f characteristics of ship gas turbine propulsion system (in the light of the requirements for ship operation in the Baltic Sea)
63%
Domachowski Z. , Dzida M.
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tom S 1
73-78
EN
The paper concerns a propulsion system of merchant ships intended for sailing in the Baltic Sea zone. Such system is to satisfy the ecological requirements determined by relevant international conventions for special zones to which the Baltic Sea also belongs. The paper draws attention to gas turbine used as a prime mover for such ships, because it satisfies the ecological requirements and has also other advantages. Application of gas turbine for ship powering does not require exhaust gas to be purified, however it requires fuel oils of a low sulphur content to be used. If the ecological rules impose the using of the fuel oils of similar quality for diesel engines then gas turbine propulsion system will be comparable - also economically (regarding specific fuel oil consumption cost) - with that of diesel engine. It would be even more favourable in a combine gas turbine /steam turbine system, especially at compound production of electric and heat energy (i.e. COGES systems). In the Baltic Sea zone gas turbines willfind application to powering a. o. such ships as : fast car-passenger ferries, fast cargo ships, special vehicles (hydrofoils, hovercraft, motor yachts).
8
Content available Operation evaluation method for marine turbine combustion engines in terms of energetics
63%
Dzida M. , Girtler J.
|
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tom nr 4
67--72
EN
An evaluation proposal (quantitative determination) of any 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 chambers occurs a conversion of chemical energy contained in the fuel-air mixture to the internal energy of the produced exhaust gases. This form of energy conversion has been called heat. It was also assumed that in the spaces between the blades of the rotor turbine, a replacement occurs of part of the internal energy of the exhaust gas, which is their thermal energy into kinetic energy conversion of its rotation. This form of energy conversion has been called the work. Operation of the combustion engine has been thus interpreted as a transmission of power receivers in a predetermined time when there the processing and transfer in the form (means) of work and heat occurs. Valuing the operation of this type of internal combustion engines, proposed by the authors of this article, is to determine their operation using physical size, which has a numerical value and a unit of measurement called joule-second [joule x second]. Operation of the combustion turbine engine resulting in the performance of the turbine rotor work has been presented, taking into account the fact that the impeller shaft is connected to the receiver, which may be a generator (in the case of one-shaft engine) or a propeller of the ship (in the case of two or three shaft engine).
9
Applicability of inlet air fogging to marine gas turbine
63%
Domachowski Z. , Dzida M.
|
|
tom 26
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nr 1
EN
The dependency of marine gas turbine on the ambient temperature leads to a decrease of the gas turbine power output in arid areas. Very often gas turbine power output demand is high and the power margins originally designed into the driver , has been exhausted. In such circumstances the inlet air fogging is an effective compensation of gas turbine power. In this paper an analysis of inlet air fogging applicability to marine gas turbine has been conducted. Different areas of ship’s voyage have been taken into account. The use of inlet air fogging in marine gas turbine must be evaluated on the basis of turbine characteristics, climate profile of ship’s voyage, and expectations of gas turbine power augmentation. The authors expect that the considerations provide useful guidance for users of marine gas turbines to decide the feasibility of installing an inlet air fogging system
10
Inlet air fogging of marine gas turbine in power output loss compensation
63%
Domachowski Z. , Dzida M.
|
|
tom 22
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nr 4
EN
The use of inlet air fogging installation to boost the power for gas turbine engines is widely applied in the power generation sector. The application of fogging to mechanical drive is rarely considered in literature [1]. This paper will cover some considerations relating to its application for gas turbines in ship drive. There is an important evaporative cooling potential throughout the world, when the dynamic data is evaluated, based on an analysis of coincident wet and dry bulb information. This data will allow ships’ gas turbine operators to make an assessment of the economics of evaporative fogging. The paper represents an introduction to the methodology and data analysis to derive the direct evaporative cooling potential to be used in marine gas turbine power output loss compensation
11
Content available Metale ciezkie w glebie na lakowo-pastwiskowych terenach przyleglych do autostrady
63%
Trzaskos M. , Dzida M.
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1995
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tom 421a
361-365
EN
The studies were carried out in 1992-1993 on the soil of meadow-pasture area in a vicinity of a motorway within two distances (5 m and 85 m). The content of Pb, Cu, Zn, Mn, Fe and pH in the soil was determined. All tested elements were found to accumulate in the upper layers of the soil. Pb and Cu quantity diminished in the deeper layers of the soil profile. In the distance of 85 m from the motorway the decline of Pb, Cu, Zn concentration and the enhancement of Mn and Fe was observed. Intensification of car communication affects an increase in Pb and Zn in tested soil.
PL
W pracy przedstawiono wyniki 3-letnich badań nad wpływem ruchu samochodowego na zawartość metali ciężkich (Pb, Cu, Zn, Mn, Fe) w glebach łąkowo-pastwiskowych w odległości 5 i 85 m od autostrady. Badania wykazały, że emisja spalin wpływa na skażenie gleby metalami, gdyż w odległości 85 m od autostrady stwierdzono niższą koncentrację Pb, Cu, Zn, a większą Mn i Fe.
12
Kurs na energię. Magazynowanie energii odpadowej z układów napędowych jednostek pływających jako jedno z narzędzi polityki zrównoważonego rozwoju
63%
Dzida M. , Gosz M.
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2017
|
tom Nr 5
78--84
PL
Okazuje się, że statki zużywają ponad 100 milionów ton paliwa rocznie! Należy podkreślić fakt, iż co najmniej kilkadziesiąt procent energii zawartej w paliwie jest bezpowrotnie „rozpraszana” w atmosferze. Olbrzymia więc ilość kilkudziesięciu ton paliwa rocznie stanowi niewykorzystany zasób energetyczny.
13
Content available CFD analysis of fluid flow through the labyrinth seal
63%
Kaszowski P. , Dzida M.
|
|
tom nr 130
57--69
EN
Steam and gas turbines are essential to produce electricity. Since the launch of the first turbine in the world, there become a tendency to constantly achieve higher efficiency. There are many solutions to overcome losses in the working steam turbine. One of such methods is the use of seals. To determine thermodynamic parameters of steam, which prevail in the seal, we could use experimental methods or numerical calculations. Experimental researchs are too expensive and time consuming. Therefore, computational fluid dynamics (CFD) is increasingly used in the analysis of fluid flow through the labyrinth seal. The paper describes the results using CFD simulation software with the help of contained a computational k-ε model.
14
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
63%
Dzida M. , Mucharski J.
|
|
nr 2
EN
The article presents a concept of a combined large-power ship propulsion system, composed of the leading internal combustion main engine associated with a power gas turbine and the steam turbine system, both utilising the energy taken from the main engine exhaust gas. In the examined variant the power turbine, arranged in parallel with a turbocharger, is fed with the exhaust gas from the exhaust manifold. A calculation algorithm is presented, along with sample calculations for particular subsystems: supercharging, gas power turbine, and steam turbine system. Assumptions were formulated for the calculations, and were complemented by the adopted limits. Selected system parameters were confronted with the experimental investigations available in the literature. The performed power optimisation of the entire combined marine power plant took only into account the thermodynamic point of view, leaving aside technical and economic aspects. The numerical calculations were performed for the 52 MW low-speed marine diesel engine
15
Struktura i charakterystyki napędów w systemie elektroenergetycznym w świetle spodziewanej prywatyzacji i demonopolizacji
63%
Domachowski Z. , Dzida M.
Wiadomości Elektrotechniczne
|
1998
|
tom nr 7
417-420
PL
Opisano znaczenie turbin gazowych w warunkach prywatyzacji i demonopolizacji systemu elektroenergetycznego. Przedstawiono strukturę wytwarzania energii elektrycznej w elektrowniach przemysłowych oraz spodziewaną rolę elektrowni przemysłowej w proponowanej prywatyzacji i demonopolizacji systemu elektroenergetycznego.
EN
The authors describe the importance of gas turbines in the conditions when the electric power system will be neither a state - owned property nor a monopoly and present the structure of generating electric energy in industrial power stations and also the expected role of an industrial power plant when the proposed privarization and demonopolization of the electric power system comes into being.
16
Content available Zagadnienie bilansowania obiegu cieplnego z zastosowaniem rachunku wyrównawczego w diagnostyce okrętowych turbinowych silników spalinowych
63%
Dzida M. , Adamkiewicz A.
|
|
tom nr 2(38)
217-223
PL
Referat przedstawia metodę określania niedostępnych pomiarowo parametrów stosowanych w diagnozowaniu okrętowych turbinowych silników spalinowych. Na przykładzie silnika jednowirnikowego pokazano parametry sygnału diagnostycznego. Przedstawiono wstępne szacowanie parametrów w bilansowaniu obiegu jednowirnikowego turbinowego silnika spalinowego. Pokazano przykładowe wyniki obliczeń sprawności termicznej komory spalania z wykorzystaniem uwiarygodnionych za pomocą rachunku wyrównawczego zarejestrowanych danych pomiarowych. Przedstawiono dyskusję otrzymanych wyników dla prezentowanej metody.
EN
This paper presents a method of determination of experimentally inaccessible parameters for diagnosing marine gas turbine engines. The applied parameters of the diagnostic signal were shown for a one-rotor engine, chosen as an example. Initial estimations of parameters for balancing the cycle of a one-rotor gas turbine engine were presented. Example results of calculating thermal efficiency of the combustion chamber, verified by reconciliation calculations of the recorded values, were given. A discussion of the obtained results for the studied method was presented.
17
Content available Zawartość litu w glebach i roślinach użytków zielonych
63%
Dzida M. , Czyz H.
Zeszyty Problemowe Postępów Nauk Rolniczych
|
1997
|
tom 448a
18
Content available Gas turbines – technological development and potential use in CAES systems
63%
Jakowski D. , Dzida M.
|
|
tom R. 55, nr 2
46--53
EN
This article briefly describes Compressed Air Energy Storage (CAES), focusing on the technological development of one of the key elements of such systems – the gas turbines. It presents the basic parameters and features of gas turbines, as well as turbine classes with example models. Main tendencies in the structural and technological development are discussed. Changes and trends on electric energy markets are becoming more and more dependent on sources with flexible operating characteristics, therefore, the advantages of gas turbines and the reasons for their development are listed as well.
PL
W artykule przedstawiono krótką charakterystykę magazynowania energii w sprężonym powietrzu (CAES), skupiając się na przeglądzie osiągnięć technologicznych jednego z podstawowych elementów tych układów – turbin gazowych. Opisano podstawowe parametry i cechy turbin gazowych, a następnie klasy turbin z przykładowymi modelami. Przedstawiono główne tendencje w rozwoju konstrukcyjnym i technologicznym. Zmiany i trendy na rynkach energii elektrycznej coraz bardziej zależą od źródeł o elastycznej charakterystyce pracy, dlatego zestawiono również zalety i powody rozwoju turbin gazowych.
19
Content available Comparing combined gas tubrine/steam turbine and marine low speed piston engine/steam turbine systems in naval applications
63%
Dzida M. , Olszewski W.
Polish Maritime Research
|
2011
|
tom nr 4
43-48
EN
The article compares combined systems in naval applications. The object of the analysis is the combined gas turbine/steam turbine system which is compared to the combined marine low-speed Diesel engine/steam turbine system. The comparison refers to the additional power and efficiency increase resulting from the use of the heat in the exhaust gas leaving the piston engine or the gas turbine. In the analysis a number of types of gas turbines with different exhaust gas temperatures and two large-power low-speed piston engines have been taken into account. The comparison bases on the assumption about comparable power ranges of the main engine.
20
Hydraulic impact in a long gas-pipelines
63%
Próchnicki W. , Dzida M.
|
2002
|
tom Vol. 13
141-149
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