Query: llc fuel

title: WORKING PROCESS OF SB 2 DRYER (DOZA AGRO LLC) IN THE COMPOSITION OF FUEL PELLETS PRODUCTION LINES
abstract: Waste free wood processing technologies are conditioned by the economic and environmental aspects of human activity. One of the stages of such technologies is processing of wood waste into fuel pellets, for the production of which appropriate lines are used. They include a large number of different machines. The article presents the results of studies of the working process of SB 2 dryer produced by Doza Agro LLC, which is a part of these lines. The paper presents its scheme and describes the principle of operation, evaluates the efficiency of the dryer working process depending on the feedstock parameters. Work process of the drying drum was carried out in the conditions of IP Kabanov, IP Bratchikov, Penza Pellet LLC, Togliatinsky Pellet Plant LLC, Promlesilim LLC, Maslyaninsky LLC, Ekolesprom LLC, Bryansk Broiler LLC, Tandem VP LLC. The influence of feedstock moisture content, temperature of the feedstock and the particle size has been determined. The particle size was estimated by their surface area. The efficiency of the dryer was evaluated by its productivity, expressed as a percentage of the maximum possible one and obtained under optimal conditions. After processing statistical information, a second order regression model has been obtained, which characterizes the drying process of crushed material the SB 2 dryer. It was revealed that feedstock moisture content has the greatest influence on the working process of SB 2 dryer. The drying process of crushed wood material differs from the drying process of chips. Namely, the temperature of the dryer has the smallest effect on the performance when drying the crushed material. When drying the shavings, their size has the smallest effect.

title: Research on the quality of diesel fuel provided by LLC Ferronordic Trading House
abstract: Ferronordic is the official dealer for Volvo Construction Equipment, Dressta, Mecalac and Rottne. In addition to sales and aftersales support for Volvo Construction Equipment, the company is a dealer for servicing Volvo and Renault Trucks, as well as a dealer for Volvo Penta for servicing industrial and marine engines in some regions of Russia. The company collaborates with other well known brands and several suppliers of attachments. The Swedish concern Volvo Group supplies to the Russian market trucks equipped with diesel engines with Common Rail injection system, as well as with pump nozzles. Diesel mechanical and electronic pump nozzles perform timely and metered injection of the working mixture into the combustion chambers of the cylinders of a diesel engine. The mechanical nozzles are driven by a high pressure fuel pump, while the electronic ones are controlled by the Common Rail electronic injection system and are constantly under intense mechanical stress. Poor quality diesel fuel leads to: loss of power, lack of traction and instability of the engine; overexpenditure and fuel leakage from sprayers; change in spray angle and time; change in the amount of injected mixture; the appearance of knocks and noises, black and bluish smoke during exhaust. The results of research work on the study of the quality of diesel fuel of the company LLC Ferronordic Trading House are presented. The physicochemical properties of diesel fuel were studied experimentally, such as: density, fractional composition, mass fraction of sulfur, mass fraction of water, flash point, limiting filterability temperature and cloud point.

title: A Highly Efficient PV and Fuel Cell Powered Full Bridge Bidirectional LLC Resonant Converter
abstract: With development in the field of research, there is a need of improvement in present equipments. This paper is about improving the efficiency of DC DC converter that will be operated with renewable sources like PV panel, fuel cell, etc. In the proposed model, a full bridge LLC converter has been developed for bidirectional operation. A PV array is connected to LLC converter which may be inverted using an inverter in Simulink. The low efficiency of PV array, Fuel Cell due to their non linear characteristics have been improved by using MPPT controller which feeds the reference voltage in the converter's voltage regulator. The regulated DC voltage from LLC converter can be used with an inverter to provide a portable AC voltage source for electrical equipment.

title: Analysis. Design and Implementation of Fuel Cell LLC Resonant Converter Used in Electrical Vehicle
abstract: This paper presents actually analysis and design of a full bridge LLC resonant converter appropriate to a fuel cell used in electrical vehicle. In fact, the LLC converter has various required aspects such as high efficiency, low electromagnetic interference (EMI) and high power density. It provides additionally a detailed practical design aspect of a full bridge LLC resonant converter. Therefore, the resonant converter is made by a bridge on the primary side and a bridge rectifier on the secondary side. It includes the determination of the selection of components such as resonant inductor, resonant capacitor and magnetization inductor. Furthermore, the performance parameters such as voltage gain and output voltage ripple are determined. An experimental converter prototype has been simultaneously designed, built up, and tested in the laboratory. Finally, a 30V input and 180V output 300W prototype is built to demonstrate of the proposed converter and analysis.

title: An Isolated DC/DC Converter Using High Frequency Unregulated LLC Resonant Converter for Fuel Cell Applications

title: (Invited) Solid Oxide Fuel Cell Development at Redox Power Systems, LLC

title: Design and development of LLC DC/DC converter for fuel cell range extender application
abstract: This paper is focused on the design and development of a new DC/DC converter based on LLC topology for charging the traction battery in an electric vehicle from the fuel cell stack. The input voltage range is 16 22 V and the output voltage is 275 350 V operating at maximum power of 1.25 kW (5 kW, four in parallel) The presented demonstrator consists of four parallel converters. The DC/DC converter has a high efficiency of about 95 high power density and low cost.

title: Fuel Cell power system with LLC resonant DC/DC converter
abstract: Fuel Cells (FC) are widely investigated for their potential use in electric transportation due of their capability to provide significant amounts of energy with low noise and with almost zero emission. FC based power sources are non linear system with low voltage and high current capabilities and with efficiency close to 50% Several researches are in progress, aiming at increasing overall efficiency through optimised combination of components, mainly the FC and the DC/DC converter necessary for its interface with the vehicle DC bus or the recharging station. In this paper, a novel and efficient power system architecture suitable for fuel cell powered vehicles and for recharging stations is proposed. The proposed system includes a fuel cell stack and a LLC resonant DC/DC converter with step up capability. The latter due its to soft switching operations ensures enhanced efficiency over conventional hard switching counterpart. The proposed system has been modeled in a mixed PSIM MATLAB/Simulink environment; design criteria and procedures are discussed for further applications and simulation results are shown to validate the proposed solution.

title: A HIGH EFFICIENCY FUEL CELL REPLACEDBY AN LLC RESONANT DC DC CONVERTER
abstract: In this paper, a high efficiency fuel cell implemented by an LLC resonant dc dc converter is proposed to save the cost and energy of fuel cell. The proposed converter has zero voltage switching (ZVS) operation of the primary switches and zero current switching (ZCS) operation of the rectifier diodes. By frequency modulation control, the output impedance of an LLC resonant converter can be regulated from zero to infinite without shunt or serial resistors. Proton Exchange Membrane fuel cell (PEMFC) is one of the promising technologies for the distributed power generation. For designing high efficiency fuel cell power systems, a suitable DC DC converter is required. Among the various topologies, interleavedboost converter (IBC) is considered as a better solution for fuel cell systems, due to improved electrical performance, reduced weight and size.

title: A novel analysis of high frequency LLC converter for fuel cell systems
abstract: This paper presents the analysis and design of isolated dc/dc converter using an unregulated LLC converter for fuel cell applications. The LLC converter operates as an isolated voltage amplifier with a constant voltage gain, and a non isolated converter installed in the input stage regulates the output voltage under a wide variation of fuel cell stack voltage. By separating the functions, the unregulated LLC converter can be operated at an optimal switching condition, and the high frequency operation of 300 kHz can be accomplished without introducing an excessive switching loss. The prototype converter with a 1 kW design shows an improved efficiency under a 48V input and full load conditions. The circuit models are developed for simulation studies. Closed loop systems are modeled and they are simulated using Matlab Simulink. The results of simulation and hardware are presented. Experimental results are compared with simulation results.