scholarly journals Physical model of energetic processes in the marine diesel engine

2017 ◽  
pp. 1-1
Author(s):  
Artur Bogdanowicz ◽  
Tomasz Kniaziewicz ◽  
Marcin Zacharewicz
Keyword(s):  
Mathematical Model ◽  
Energy Efficiency ◽  
Diesel Engine ◽  
Physical Model ◽  
Dynamic Processes ◽  
Marine Diesel Engine ◽  
Naval Academy ◽  
Gas Dynamic ◽  
Marine Diesel

The paper describes the preliminary physical model of gas-dynamic processes that take place in the cylinder of marine diesel engine. The model is a part of the work undertaken at the Institute for Construction and Exploitation of Ships at the Polish Naval Academy. The physical model is the basis for the development of a mathematical model of marine diesel engine, which will be useful for determining the energy efficiency of Polish ships, as well as for diagnostic purposes.

scholarly journals The analysis of a diagnostic informativeness of gas dynamic parameters in a marine diesel engine turbocharging system through an entropy function

2009 ◽  
Vol 137 (2) ◽  
pp. 19-25
Author(s):  
Zbigniew KORCZEWSKI ◽  
Marcin ZACHAREWICZ
Keyword(s):  
Diesel Engine ◽  
Diagnostic Testing ◽  
Experimental Investigations ◽  
Diagnostic Purpose ◽  
Marine Diesel Engine ◽  
Spectral Correlation ◽  
Flow Process ◽  
Gas Dynamic ◽  
Marine Diesel ◽  
Entropy Functions

The article presents selected elements of the elaborated diagnostic testing method of marine diesel engine working spaces based on the energetic and spectral-correlation analysis of the course of the pulsating exhaust flow process in the channel powering a turbocharger. The investigations have been worked out within the scope of a realization of the research project No. 0T00B02129 funded by the Committee of Scientific Research. Conducting of an analysis of the diagnostic informativeness among the parameters characterizing the observed gas dynamic processes represented an essential methodological question of the project. A mathematical model, enabling simulations of well-known and recognizable engine working spaces failures as well as an entropy functions, as the measure of uncertainty of the set of identified states of the engine unfitness were applied for such a diagnostic purpose. Having evaluated the diagnostic information three diagnostic parameters were selected in the result of experiments of the numerical simulation. Thus, the adequate parameters of a technical state assessment of the marine diesel engine working spaces were chosen while there was no possibility to work out the cylinder indication (to create cylinder indicator diagrams). The conducted simulating investigations represented an introduction to the experimental investigations (to the diagnostic tests) of DETROIT DIESEL and ZVIEZDA engines that had been put into operation on the Polish Navy warships in recent years.

scholarly journals Model tests of a marine diesel engine powered by a fuel-alcohol mixture

2021 ◽  
Author(s):  
Marcin Zacharewicz ◽  
Tomasz Kniaziewicz
Keyword(s):  
Mathematical Model ◽  
Diesel Engine ◽  
Alternative Fuels ◽  
Fossil Fuels ◽  
Diesel Oil ◽  
Marine Diesel Engine ◽  
Engine Model ◽  
Marine Engines ◽  
Marine Diesel ◽  
The Mathematical Model

The paper presents the results of model and empirical tests conducted for a marine diesel engine fueled by a blend of n-butanol and diesel oil. The research were aimed at assessing the usefulness of the proprietary diesel engine model in conducting research on marine engines powered by alternative fuels to fossil fuels. The authors defined the measures of adequacy. On their basis, they assessed the adequacy of the mathematical model used. The analysis of the results of the conducted research showed that the developed mathematical model is sufficiently adequate. Therefore, both the mathematical model and the computer program based on it will be used in further work on supplying marine engines with mixtures of diesel oil and biocomponents.

scholarly journals High Reduction Efficiencies of Adsorbed NOx in Pilot-Scale Aftertreatment Using Nonthermal Plasma in Marine Diesel-Engine Exhaust Gas

Energies ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3800 ◽  
Author(s):  
Kuwahara ◽  
Yoshida ◽  
Kuroki ◽  
Hanamoto ◽  
Sato ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Diesel Engine ◽  
Nox Reduction ◽  
Nonthermal Plasma ◽  
High Energy ◽  
Particulate Filter ◽  
Marine Diesel Engine ◽  
Marine Diesel ◽  
High Reduction ◽  
Adsorption Desorption

An efficient NOx reduction aftertreatment technology for a marine diesel engine that combines nonthermal plasma (NTP) and NOx adsorption/desorption is investigated. The aftertreatment technology can also treat particulate matter using a diesel particulate filter and regenerate it via NTP-induced ozone. In this study, the NOx reduction energy efficiency is investigated. The investigated marine diesel engine generates 1 MW of output power at 100% engine load. NOx reduction is performed by repeating adsorption/desorption processes with NOx adsorbents and NOx reduction using NTP. Considering practical use, experiments are performed for a larger number of cycles compared with our previous study; the amount of adsorbent used is 80 kg. The relationship between the mass of desorbed NOx and the energy efficiency of NOx reduction via NTP is established. This aftertreatment has a high reduction efficiency of 71% via NTP and a high energy efficiency of 115 g(NO2)/kWh for a discharge power of 12.0 kW.

Marine Diesel Engine Simulator for Self-Propulsion Test in Evaluating the Fuel Saving Rate

2015 ◽  
Vol 799-800 ◽  
pp. 870-875
Author(s):  
Sunarsih ◽  
Izzuddin Nur ◽  
Agoes Priyanto
Keyword(s):  
Mathematical Model ◽  
Control System ◽  
Diesel Engine ◽  
Real Time ◽  
The Self ◽  
Marine Diesel Engine ◽  
Saving Rate ◽  
Fuel Saving ◽  
Rotating Speed ◽  
Marine Diesel

As the vessel operates in the rough open seas, a marine diesel engine simulator which engine rotation is controlled to transmit through propeller shaft is a new methodology for the self-propulsion tests to track the fuel saving in a real time. Considering the circumstance, this paper presents the real time of marine diesel engine simulator system to track the real performance of a ship through computer-simulated model. A mathematical model of marine diesel engine and the propeller are used in the simulation to estimate fuel rate, engine rotating speed, thrust and torque of the propeller thus achieve the target vessel’s speed. The input and output are real time control system of fuel saving rate and propeller rotating speed representing the marine diesel engine characteristics. The self-propulsion test simulation results in calm water [7] were compared to validate the present marine diesel engine simulator. The present simulator then was used to evaluate the fuel saving by employing a new mathematical model of turbocharged marine diesel engine and was applied to a full scale target vessel. The control system developed will be beneficial for users as to analyze different condition of vessel’s speed to obtain better characteristics and hence optimize the fuel saving rate.

Simulation Analysis on Wearing Quantity of Marine Low-Speed Diesel Engine’s Piston Ring

2012 ◽  
Vol 152-154 ◽  
pp. 1057-1062
Author(s):  
Guo Jin Chen ◽  
Zhang Ming Peng ◽  
Jian Guo Yang ◽  
Qiao Ying Huang
Keyword(s):  
Mathematical Model ◽  
Diesel Engine ◽  
Piston Ring ◽  
Simulation Analysis ◽  
Marine Diesel Engine ◽  
Axial Motion ◽  
Marine Diesel ◽  
The Mathematical Model ◽  
Online Monitor ◽  
Oil Tanker

This paper establishes the mathematical model of the piston ring’s wearing capacity for the marine diesel engine, studies the influence of the piston ring’s axial motion and radial motion to the magnetic field’s output signal, computes and analyzes the corresponding relationships of the magnetoresistive sensor’s output and the piston ring’s wearing capacity, and does the on-board experiment on the oil tanker with the 6RTA52U diesel engine. Measuring actually the magnetoresistive sensor’s output corresponding to the piston ring’s wearing capacity of the marine diesel engine confirms the correctness for the mathematical model of the wearing capacity. The research conclusions lay the technical foundation for the online monitor of the piston ring’s wear.

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

2021 ◽  
Vol 28 (4) ◽  
pp. 63-87
Author(s):  
Mohammad Hossein Ghaemi
Keyword(s):  
Mathematical Model ◽  
Diesel Engine ◽  
Simulation Model ◽  
Diesel Engines ◽  
Model Parameters ◽  
Marine Diesel Engine ◽  
Simple Method ◽  
Wide Range ◽  
Constant Pitch ◽  
Marine Diesel

Abstract 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 with high costs and the relevant data are not available publicly for a selected engine. The present paper delivers a rapid and relatively simple method for preparing a simulation model of a given marine diesel engine, based only on the widely available data in the project guides indicated for steady state conditions. After establishing the framework of the mathematical model, it describes how the parameters of the model can be adjusted for the simulation model and how the results can be verified as well. Conceptually, this is a trial and error method, but the presented case example makes clear how the parameters can be selected to reduce the number of trials and quickly determine the model parameters. The necessary descriptions are given through a case study, which is the MAN-B&W 8S65ME-C8 marine diesel engine. The engine is assumed to be connected to a constant pitch propeller. The presented mathematical model is a mean-value zero-dimensional type with seven state variables. The other variables of the engine are determined based on the state independent variables and the input value, which is the fuel rate. The paper can be used as a guideline to prepare a convenient mathematical model for simulation, with the minimum publicly available data.

scholarly journals Evaluation of adequacy of a model of a marine diesel engine based upon empirical research

2020 ◽  
Vol 181 (2) ◽  
pp. 40-45
Author(s):  
Tomasz KNIAZIEWICZ ◽  
Marcin ZACHAREWICZ
Keyword(s):  
Mathematical Model ◽  
Diesel Engine ◽  
Empirical Research ◽  
Technical Condition ◽  
Marine Diesel Engine ◽  
Marine Engine ◽  
Basic Assumptions ◽  
Innovative Method ◽  
Marine Diesel ◽  
Comparison Of The Results

The article presents a mathematical model of a marine diesel engine developed for the needs of the research on the innovative method of evaluating technical condition of a marine engine. Basic assumptions of the method under development have also been included. The main focus has been directed on the evaluation of adequacy of a mathematical model of a marine diesel engine proposed in this article. In addition, measures of adequacy for the needs of the conducted research have also been presented. A comparison of the results of empirical and modeling research was presented. Finally, the article shows results from the conducted research followed by conclusions.

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