Fuel Consumption Estimate Of Variable Speed Diesel-Generator Unit On The Basis Of Matrix Frequency Converter

2019 ◽  
Author(s):  
A. Dar'enkov
Keyword(s):  
Fuel Consumption ◽  
Frequency Converter ◽  
Variable Speed ◽  
Diesel Generator ◽  
Generator Unit

scholarly journals Ship power plant with reversible shaft generator unit operating by dual-power machine scheme and variable speed diesel generator

2021 ◽  
Vol 2021 (3) ◽  
pp. 93-100
Author(s):  
Oleg Stanislavovich Khvatov ◽  
Ilya Aleksandrovich Tarpanov ◽  
Pavel Vadimovich Kuznecov
Keyword(s):  
Frequency Converter ◽  
Sharp Decrease ◽  
Simulation Models ◽  
Electric Power System ◽  
Small Displacement ◽  
Variable Speed ◽  
Diesel Generator ◽  
Low Speed ◽  
Operating Modes ◽  
Generator Unit

The article presents the analysis of the operating modes of small displacement vessels, which states that most of the working time the vessels are in standby mode, or move at low speed. The main ship diesel engines operate at a load of 10-15% (maximum 20%), which impacts the operational performance: the oil and water jacket of the engine do not have time to warm up, fuel and oil consumption increases. There takes place coking of piston rings, intercoolers and other components, which leads to a sharp decrease in the service life of the engine. In order to eliminate the disadvantages happening in the main engines operation in shared load modes, it is considered to use the shaft generator unit as a propeller shaft unit in the prolonged operation of the vessel at passing with a low speed and maneuvering. Such a variant of the shaft generator can be called a reversible shaft generator unit (RSGU) capable of operating in both generator and motor modes. At the same time, it is advisable to power the reversible shaft generator and general ship consumers from a diesel generator, which, in order to save fuel, can be applied as a variable speed diesel generator unit. There is presented a RSGU variant based on an asynchronous machine with a phase rotor and a frequency converter in the rotor (a double power supply machine). The functional and structural schemes of the ship’s electric power system using the variable speed diesel generator and the propulsive system based on the reversible shaft generator are presented. In the Matlab software there are developed the simulation models and presented the results of simulation modeling of the operating modes of the above systems.

scholarly journals Study on the Variable Speed Diesel Generator and Effects on Structure Vibration Behavior in the DC Grid

2021 ◽  
Vol 11 (24) ◽  
pp. 12049
Author(s):  
Quang Dao Vuong ◽  
Jongsu Kim ◽  
Jae-Hyuk Choi ◽  
Jae-ung Lee ◽  
Ji-woong Lee ◽  
...  
Keyword(s):  
Fuel Consumption ◽  
Air Pollutants ◽  
Engine Speed ◽  
New Technologies ◽  
Fuel Efficiency ◽  
Combustion Process ◽  
Shipping Industry ◽  
Variable Speed ◽  
Diesel Generator ◽  
Structure Vibration

Global warming and air pollutants are in general major worldwide concerns including for the marine shipping industry. Equipped with new technologies, the onboard DC grid has proven several advantages, including up to 27% reduction in specific fuel consumption with reduced emissions. That can be achieved by installing an optimized variable speed diesel generator. The engine speed is adjusted according to the required power, which allows to always keep the best efficiency of the combustion process. However, it also exposes some changes in the behavior of the structure vibrations. Measurements on an experimental variable speed diesel generator show that vibration increases when trying to slow down the engine for the same load. This behavior is closely related to the resonance in low rev range that usually occurs with general gensets. In other words, we can conclude that the DC grid’s variable speed generator may be beneficial for fuel efficiency, but not for mechanical life and safety. Several measures had been given, of which the alternation of the natural frequency is presented as an economical and efficient solution. The ultimate goal is to maintain operational safety while respecting reduced fuel consumption.

Research on Power Regulation Schedule Control System for Turboprop Engine

2018 ◽  
Vol 0 (0) ◽  
Author(s):  
Tianqian Xia ◽  
Xianghua Huang
Keyword(s):  
Control System ◽  
Steady State ◽  
Fuel Consumption ◽  
Reference Model ◽  
Sliding Mode ◽  
Speed Control ◽  
Variable Speed ◽  
Turboprop Engine ◽  
Speed Control System ◽  
Variable Speed Control

Abstract A method of variable speed control system for turboprop engine is presented in this paper. Firstly, the steady operation state of turboprop engine is analyzed, and the operating line is figured out in the steady state characteristic diagram, which is the design basis of Engine Thrust Management System (ETMS). Secondly, the reference model sliding mode multivariable control is used to design the control law to follow the speed instructions given by ETMS. Finally, the optimization of the minimum fuel consumption operating curve is realized, and the control system designed is applied to a numerical model of a turboprop engine. The simulation results show that compared with the constant speed control system, the variable speed control system can reduce the specific fuel consumption by 2.37 % on average and 3.1 % in steady state conditions. Furthermore, the method can enable the pilot to manipulate the turboprop aircraft by using only one throttle lever, which can greatly reduce the pilot operation burden.

scholarly journals Development of a mathematical model of diesel-generator units with a valve-inductor generator

2021 ◽  
Vol 2057 (1) ◽  
pp. 012076
Author(s):  
V A Zhigarev ◽  
A V Minakov ◽  
D V Guzei ◽  
M I Pryazhnikov ◽  
V I Panteleev
Keyword(s):  
Mathematical Model ◽  
Calculated Data ◽  
Power Losses ◽  
Diesel Generator ◽  
Fuel Injectors ◽  
Operating Modes ◽  
Effective Operation ◽  
Generator Unit ◽  
Operation Parameters

Abstract The paper presents a comprehensive mathematical model of a diesel-generator units with a valve-inductor generator. The calculated data obtained using this model allows optimizing the operation of fuel injectors and adjust the injection characteristics. The electromagnetic part of the model allows taking into account the power losses and efficiency of the generator, calculating the phase windings and their connection schemes, methods for setting the voltage or current of any shape that feeds the windings of the valve-inductor generator, as well as the characteristics of the rotor, stator, and winding materials to obtain the most effective operation parameters of the engine in various operating modes as part of the generator unit.

Implementation of IoT-Based Generator Management System Using GPy

2021 ◽  
Vol 10 (1) ◽  
pp. 33-49
Author(s):  
Deepak Sheshbadan Verma ◽  
Sumit Satish Pai ◽  
Krishna Nagendra Vishwakarma
Keyword(s):  
Real Time ◽  
Fuel Consumption ◽  
Mobile Application ◽  
Current Method ◽  
Diesel Generator ◽  
Current Management ◽  
Digital Devices ◽  
Ac Power ◽  
Modern Business ◽  
New System

In the era of digital devices, many industries still use traditional methods of pen and paper to maintain records. One such industry is the diesel generator industry where these generators are operated without any proper supervision. The current management of these generator vans is highly unorganized. This causes a lot of miscommunication between the owners and the customers. The idea focuses on monitoring the different parameters of a diesel generator using internet-connected sensors. Parameters such as fuel consumption, AC power ON time, RPM of the turbine, and temperature are measured in real time. The system helps the owners to monitor their generators vans through one mobile application rather than depending on the on-site operators. Both the owners and customers can see how much power was consumed and how their bill was generated. Rather than using pen and paper to maintain records in the current method, the new system completely transforms the old methods into a highly digitalized modern business.

scholarly journals Variable-Speed Engines on Wind Farm Support Vessels

2020 ◽  
Vol 8 (3) ◽  
pp. 229 ◽  
Author(s):  
Kristian Eikeland Holmefjord ◽  
Lars Husdal ◽  
Martijn de Jongh ◽  
Sverre Torben
Keyword(s):  
Direct Current ◽  
Diesel Engines ◽  
Wind Farm ◽  
East Coast ◽  
Frequency Converter ◽  
Real Life ◽  
Alternating Current ◽  
Variable Speed ◽  
Fixed Frequency ◽  
Fuel Savings

We examine the fuel savings of Edda Passat, a newly constructed wind farm support vessel that utilizes a common direct current (DC) grid. This enables its diesel engines to operate at variable speeds by using frequency converter technology. A detailed investigation of these benefits has been performed based on real-life measurements from three months of operations in the Race Bank wind farm off the east coast of England. The calculated fuel savings of Edda Passat achieved via its variable-speed engines are 21% lower compared to using a conventional alternating current (AC) grid with a fixed frequency. This paper will explain the technology, measurements, and results in detail.

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