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Wyszukujesz frazę "Girtler, J." wg kryterium: Autor

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    Wyświetlanie 1-6 z 6
    Tytuł:
    A method for evaluating theoretical and real operation of diesel engines in energy conversion formulation taking into account their operating indices
    Autorzy:
    Girtler, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/260600.pdf
    Data publikacji:
    2011
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    operation
    energy
    diesel engine
    ship’s main engine
    Opis:
    The article proposes valuating the operation of an arbitrary diesel engine, based on the sample case of a ship’s main engine in which energy conversion processes take place in a given time. The above operation is understood as the energy transfer to the screw propeller in the given time in which the energy conversion into work and/or heat and its further transmission take place. The here proposed method for evaluating the operation of the main engines installed in marine power plants consists in comparing the operation of these engines to a physical quantity the measuring unit of which is the joule-second (joule×second). A new term is introduced which bears the name of the theoretical engine operation and is the standard (ideal) operation which can be compared to the operation of real engines revealing different levels of wear. It was shown that the calculations of the theoretical operation defined in the above way cannot make direct use of commonly known theoretical Diesel and Sabathe cycles. Instead they should use the cycles modified by heat abstraction taking place in accordance with the isobaric, or isothermal process. Other new terms introduced in the article are: the degree of excellence of energy conversion to work, considered as the measure of excellence of engine operation, and the degree of engine operation dissipation, being the measure of its real operation. It is shown that if in time t of engine operation the case takes place that: Li = idem and Le = idem, then the engine operation dissipation is equal to its mechanical efficiency.
    Źródło:
    Polish Maritime Research; 2011, 3; 31-36
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Energetyczny aspekt diagnostyki maszyn
    Energy-based aspect of machine diagnostics
    Autorzy:
    Girtler, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/327526.pdf
    Data publikacji:
    2008
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    diagnostyka
    działanie
    maszyna
    energia
    stan techniczny
    diagnostics
    operation
    machine
    energy
    technical state
    Opis:
    W artykule zaproponowano interpretację wartościującą działania, które (podobnie jak przedstawione mechanice klasycznej działania Hamiltona i Maupertiusa oraz działanie wynikające ze zmiany pędu ciała) jest rozpatrywane jako wielkość fizyczna o jednostce miary zwanej dżulosekundą [dżulxsekunda]. Przedstawiono oryginalną metodę analizy i oceny działania maszyn w ujęciu energetycznym dla potrzeb diagnostycznych. Do uzasadnienia przydatności tak interpretowanego działania zastosowano jednorodny proces Poissona i proces semi-Markowa. Procesy te umożliwiły skonstruowanie modelu przebiegu pogarszania się działania maszyny z upływem czasu jej funkcjonowania. Modelem tym jest więc proces losowy Poissona lub semi-Markova. Rozważania dotyczące energetycznego aspektu diagnostyki maszyn przedstawiono na przykładzie silników spalinowych, w szczególności silników o zapłonie samoczynnym.
    The paper presents a proposal of quantitative interpretation of operation which (just like in physics: the operations of Hamilton and Maupertius and the operation issuing from the changes of body momentum) is considered as a physical quantity with the unit of measure: a joule-second [joule´second]. The original method for analysis and estimation of machine operation has been showed in energy-based terms for the needs of diagnostics. In order to give the grounds for usability of such interpreted operation the homogeneous process of Poisson and process of semi-Markov have been herein applied. The two processes have enabled building a model of run of getting-worse (decreasing) operation of a machine at the lapse of its operation time. Thus, the model is a random process of Poisson or semi-Markov. The considerations concerning energy-based aspect of machine diagnostics have been provided on the example of combustion engines, mainly diesel engines.
    Źródło:
    Diagnostyka; 2008, 1(45); 149-156
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Metoda identyfikacji stanu technicznego urządzeń na podstawie oceny ich działania
    Identification method of technical state of the objects on the ground of estimation of their work
    Autorzy:
    Girtler, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/327922.pdf
    Data publikacji:
    2001
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    diagnostyka
    działanie
    energia
    stan techniczny
    urządzenie
    device
    energy
    diagnostics
    technical state
    work
    Opis:
    Przedstawiono propozycję ilościowej interpretacji działania dowolnego urządzenia, w którym zachodzą oddziaływania energetyczne w określonym czasie. Według tej interpretacji, działanie urządzeń zostało przyrównane do pojęcia wielkości fizycznej, z jednostką miary [dżulxsekunda], którą można przedstawić zależnością podobną do tych, jakie są używane w fizyce, a ściślej w mechanice klasycznej i mechanice kwantowej. Uzasadniono, że w przypadku przyjęcia zaproponowanej interpretacji działania urządzeń, w których następują przemiany energetyczne, działanie może być nośnikiem informacji o stanie tych urządzeń, a więc - sygnałem diagnostycznym. Do uzasadnienia tego zastosowano jednorodny proces Poissona, który umożliwił skonstruowanie modelu przebiegu pogarszania działania urządzeń, jako procesu losowego o jednorodnych i niezależnych przyrostach spadku generowanej przez nie energii w określonym czasie.
    The paper presents suggestion of quantitative interpretation of work of a objects, in which energetic interactions proceed in determined time. According to the interpretation, work of the object is considered as a physical quantity with the unit of measure [joulexsecond], which can be presented by the dependence similar to these ones which are used in classic mechanics ad quantum mechanics. It has been motivated that, in the case of accepting the suggested interpretation of work of objects, in which energetic changes proceed, such work can be a carrier of information about states of these systems - so, it can be a diagnostic signal. To motivate this, it has been used homogeneous Poisson's process, which made possible designing model of the course of getting the objects' work worse. This model is a random process of homogeneous, independent, single and the same gains e in energy drop, in determined time.
    Źródło:
    Diagnostyka; 2001, 25; 5-12
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Conception of valuation of combustion engine operation
    Autorzy:
    Girtler, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/244104.pdf
    Data publikacji:
    2008
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    heat
    operation
    energy
    work
    semi-Markov process
    combustion engine
    Opis:
    The work provides a proposal of interpretation showing operation in terms of values being compared to a physical quantity with the unit of measure called joule-second, just like operations of Hamilton and Maupertius demonstrated in classical mechanics. Operation in this interpretation is also considered in quantum mechanics, referring to body electromagnetic radiation source of which operation is characterized by Planck constant. An original method of analysis and evaluation of machine operation is herein presented in the energetic aspect, as the result of applying the theory of semi-Markov processes. In order to give grounds for usability of such interpreted operation it has been employed the model describing changes in energy of combustion engines, in the form of state-discrete and time-continuous semi-Markov process. The process is thus a semi-Markov model of getting worse combustion engine operation run with the lapse of time and regaining the initial energetic state of the engine after its refurbishment. The limiting distribution of the process has been determined with probabilities of occurring the distinguished energetic states of mentioned engines. The paper shows that the proposed interpretation for the operation enables making a graph of operation, which demonstrates engine operation in the form of field. The attention is paid that the engine operation in the presented version has got the advantage that can be expressed as a quantity with the joule-second as a unit of measure and as a graph in the form of operation field. The coordinate system for presenting the operation as a field, proposed in this paper, refers to the known in thermodynamics possibility of expressing the energy conversion sorts like work and heat (according to the conception of Clapeyron and Belpaire) in the form of fields.
    Źródło:
    Journal of KONES; 2008, 15, 2; 89-96
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The semi-Markov model of energy state changes of the main marine internal combustion engine and method for evaluating its operation during ship voyage
    Autorzy:
    Girtler, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/260072.pdf
    Data publikacji:
    2011
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    operation
    energy
    semi-Markov process
    piston internal combustion engine
    Opis:
    The article presents a method for evaluating the operation of internal combustion engines used as the main engines in the propulsion systems of sea-going ships in various operating conditions. This method enables calculating the engine operation value based on the theory of semi-Markov processes and mathematical statistics. What is noteworthy, the operation of the examined internal combustion engines is compared to a physical quantity which is expressed in the form of a number with the measure unit called joule-second. a model having the form of a semi-Markov process is proposed to describe the energy state changes taking place in the main engines during their operation. Also proposed is the use of the point and interval estimation at a given confidence level â for determining the value of the energy converted in the engine during its operation for the known and unknown standard energy deviation treated as the random variable. The semi-Markov model of changes of the energy converted in the engine during its operation is presented in a general form. The above model was used for determining the ship’s main engine operation, which is in the examined case a function of the energy converted in particular energy states, the expected value of the time of duration of these states and the probability of their existence. These probabilities compose the limiting distribution of the semi-Markov process, the values of which are the specified main engine energy states.
    Źródło:
    Polish Maritime Research; 2011, 4; 36-42
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Operation evaluation method for marine turbine combustion engines in terms of energetics
    Autorzy:
    Dzida, M.
    Girtler, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/259307.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
    Tematy:
    work
    Hamilton work
    Maupertius work
    energy
    turbine combustion engine
    Opis:
    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).
    Źródło:
    Polish Maritime Research; 2016, 4; 67-72
    1233-2585
    Pojawia się w:
    Polish Maritime Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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