Showing papers on "Prime mover published in 2012"

System and method for powering a hydraulic pump

Abstract: A hydraulic pump powering system includes a mobile vehicle, a first electric current generator device, and one or more electric pump motors. The mobile vehicle has first and second prime movers. The first electric current generator device is disposed onboard the mobile vehicle and is configured to be mechanically coupled with the first prime mover to convert movement created by the first prime mover into first electric current. The one or more electric pump motors are configured to receive the first electric current to power a hydraulic pump. The second prime mover is configured to generate movement that is converted into a propulsive force that propels the mobile vehicle. The one or more electric pump motors are configured to receive the first electric current in order to power the hydraulic pump to pump a fluid into a pumping location located off-board the mobile vehicle.

Vehicle and method of controlling a vehicle

Abstract: Embodiments of the present invention provide a motor vehicle having: prime mover means; at least first and second groups of one or more wheels; and a driveline operable to connect the prime mover means to the first and second groups of one or more wheels such that the first group of one or more wheels and not the second group is coupled to a torque transmission path from the prime mover means when the driveline is in a first mode of operation and both the first and second groups of one or more wheels are coupled to a torque transmission path from the prime mover means when the driveline is in a second mode of operation, the driveline including an auxiliary portion for connecting the second group to the torque transmission path from the prime mover means, the auxiliary portion comprising first and second releasable torque transmitting means and a prop shaft, the first releasable torque transmitting means being operable to connect a first end of the prop shaft to the torque transmission path from the prime mover means, the second releasable torque transmitting means being operable to connect a second end of the prop shaft to the second group of one or more wheels, the vehicle further comprising control means operable to control the first and second torque transmitting means to switch the driveline between the first and second modes of operation such that in the first mode the prop shaft is disconnected from both the torque transmission path from the prime mover means and said second group of one or more wheels, wherein when in the first mode the vehicle is operable to control the driveline to switch from first mode to the second mode responsive to a speed of the vehicle.

Sizing analysis of a combined cooling, heating, and power system for a small office building using a wood waste biomass‐fired Stirling engine

Abstract: SUMMARY When wood chips are available and used to fuel a combined cooling, heating, and power (CCHP) waste heat recovery system, they can represent an economically viable source of biomass energy that can meet a facility's electric and thermal demands. Using a Stirling engine as the CCHP prime mover provides several important advantages over conventional internal combustion engines including no additional processing of the waste wood chips, a potentially higher thermal efficiency, flexibility of fuel sources, and low maintenance. This study shows how the operational characteristics of a constant output, biomass-fired, Stirling engine-based CCHP system are affected by the performance of the individual components, including the prime mover, heat recovery system, auxiliary boiler, absorption chiller, and heating coil unit The results are assessed by examining the primary energy consumption and operational cost compared with a reference case. The analysis provides insight on the prime mover sizing and selection of each component to properly implement the system. In addition to examining the effects of each component, the effect of excess electricity production and buyback are considered. Copyright © 2010 John Wiley & Sons, Ltd.

Engine control device of work machine and engine control method therefor

Abstract: An engine control device is provided including: detection units for detecting a driving state of a work machine using a generator, target engine speed setting units for causing, on the basis of the driving state, a target engine speed set for a case where electric power generation by the generator is OFF to be the same as a target engine speed set for a case where the electric power generation by the generator is ON, and engine target output calculation units for calculating an engine target output during electric power generation OFF that can be output at most when the electric power generation by the generator is OFF, and calculates an engine target output obtained by adding an output corresponding to an electric power generation amount by the generator to the engine target output when the electric power generation by the generator is ON.

Power transmission device

Abstract: A power transmission system having a positive displacement pump which is driven by a prime mover, and an output member which is driven by a fluid discharged from the positive displacement pump, characterized by comprising a rotational direction switching mechanism for switching a rotational direction of the output member between forward direction and backward direction. The rotational direction switching mechanism comprises a mechanism for switching a direction of a torque applied to the output member through the fluid between forward direction and backward direction.

Two-speed transmission and electric vehicle

Abstract: A two-speed transmission is provided. The transmission comprises a planetary gear train ( 8 ) having a sun gear, a fixed annular gear ( 8 b ), at least one planet gear ( 8 c ) and a planet carrier ( 8 d ). A dual clutch ( 10 ) is disposed between the planetary gear train and a prime mover which outputs rotational movement. The dual clutch is configured to be driven into a first clutching mode in which it kinematically couples the sun gear with the prime mover, and a second clutching mode in which it kinematically couples the planet carrier with the prime mover. And an actuator is configured to selectively drive the dual clutch into one of its first and second clutching modes. An electric vehicle comprises the two-speed transmission.

Modeling and Performance Analysis of Microturbine Generation System in Grid Connected/Islanding Operation

Abstract: Distributed generation (DG) has drawn a great attention in distribution network due to reduction in transmission loss, load sharing property and improving the power quality. Among the different source of DG, the microturbine generation (MTG) system has a good record of improving the system stability, reliability and power quality. This paper presents modeling and performance analysis of MTG system in grid connected and islanding modes of operation. The model developed in this work includes the individual components of prime mover like, compressor, heat exchanger, burner and turbine. The model of MTG system consists of microturbine, permanent magnet synchronous machine (PMSM) and power electronics interfacing circuit for generation and conversation from AC/DC/AC respectively. The MTG system uses a DC link voltage to control the microturbine output power by fuel and air flow control methodology. The DC link power is delivered to the load through a voltage source inverter (VSI) with pulse width modulation (PWM) technique. The model of MTG system has been implemented using Matlab/Simulink environment and its simulation result shows the load following performance of MTG system for various loads.

Part-Load Performance of Gas Turbines: Part II — Multi-Point Adaptation With Compressor Map Generation and GA Optimization

Abstract: Accurate gas turbine performance simulation is a vital aid to the operational and maintenance strategy of thermal plants having gas turbines as their prime mover. Prediction of the part load performance of a gas turbine depends on the quality of the engine’s component maps. Taking into consideration that compressor maps are proprietary information of the manufacturers, several methods have been developed to encounter the above limitation by scaling and adapting component maps.This part of the paper presents a new off-design performance adaptation approach with the use of a novel compressor map generation method and Genetic Algorithms (GA) optimization. A set of coefficients controlling a generic compressor performance map analytically is used in the optimization process for the adaptation of the gas turbine performance model to match available engine test data.The developed method has been tested with off-design performance simulations and applied to a GE LM2500+ aeroderivative gas turbine operating in Manx Electricity Authority’s combined cycle power plant in the Isle of Man. It has been also compared with an earlier off-design performance adaptation approach, and shown some advantages in the performance adaptation.Copyright © 2012 by ASME

Reciprocating pump assembly and method thereof

Abstract: A reciprocating pump assembly including a first fluid assembly; a second fluid assembly; and, a power assembly operable by a prime mover. A prime mover including one of an engine and a motor. The power assembly interposed between and shared by the first fluid assembly and the second fluid assembly. The power assembly including at least one rotatable crankshaft operating the first and second fluid assemblies. Also included is a method of pumping fluid for a downhole operation.

Probabilistic Multiobjective Operation Management of MicroGrids With Hydrogen Storage and Polymer Exchange Fuel Cell Power Plants

Abstract: This paper models and solves the operation management problem of MicroGrids (MGs) including cost and emissions minimization under uncertain environment The proposed model emphasizes on fuel cells (FCs) as a prime mover of combined heat and power (CHP) systems An electro-chemical model of the proton exchange membrane fuel cell (PEMFC) is used and linked to the daily operating cost and emissions of the MGs A reformer is considered to produce hydrogen for PEMFCs Moreover, in high thermal load intervals, in order to make the MG more efficient, a part of produced hydrogen is stored in a hydrogen tank The stored hydrogen can be reused by PEMFCs to generate electricity or be sold to other hydrogen consumers A probabilistic optimization algorithm is devised which consists of 2m + 1 point estimate method to handle the uncertainty in input random variables (IRVs) and a multi-objective Self-adaptive Bee Swarm Optimization (SBSO) algorithm to minimize the cost and emissions simultaneously Several techniques are proposed in the SBSO algorithm to make it a powerful black-box optimization tool The efficiency of the proposed approach is verified on a typical grid-connected MG with several distributed energy sources

A doubly-fed induction generator test facility for grid fault ride-through analysis

Abstract: This paper has described a laboratory-scale DFIG test facility commissioned to investigate the low voltage fault behavior of a DFIG wind turbine generator. In this DFIG test facility, a dc motor driven by a four-quadrant dc drive is used as a prime mover to replicate the torque input from a wind turbine's drive shaft. A mechanical model created in Simulink is executed by the dSpace controller. The IGBT power converter and dc-link capacitors are over-rated to withstand various grid faults. The fault emulator permits a flexible approach to the application of grid faults and also provides an opportunity to mimic the typical grid connection impedance of a wind turbine.

Vehicle, and method and system of controlling a vehicle

Abstract: Embodiments of the present invention provide a motor vehicle having: a prime mover; first and second groups of one or more wheels; and a driveline to connect the prime mover to the first and second groups of one or more wheels such that the first group of one or more wheels and not the second group may be driven by the prime mover when the driveline is in a first mode of operation and both the first and second group of one or more wheels may be driven by the prime mover when the driveline is in a second mode of operation, the driveline including an auxiliary portion comprising a first releasable torque transmitting means, a prop shaft and a second releasable torque transmitting means, the first releasable torque transmitting means being operable to connect a first end of the prop shaft to the prime mover, the second releasable torque transmitting means being operable to connect a second end of the prop shaft to the second group of one or more wheels, the vehicle further comprising control means operable to control the first and second torque transmitting means to switch the driveline between the first and second modes of operation such that in the first mode the prop shaft is disconnected from both the prime mover and said second group of one or more wheels by means of the first and second releasable torque transmitting means, in the first mode the control means being operable automatically to connect the prop shaft to only one selected from amongst the prime mover and the second group of one or more wheels by means of the first or second releasable torque transmitting means responsive to a value of a temperature parameter determined by the control means, the temperature parameter corresponding to a temperature of a component of the vehicle.

Electromagnetic braking systems and methods

Abstract: An electromagnetic braking system of a power generation system includes an electrically conductive disc coupled to a rotatable shaft operatively coupled between a prime mover and a generator; a controller for receiving a status signal from the power generation system and for generating a control signal based on the status signal; and an inducting unit for applying an electromagnetic braking force on the electrically conductive disc when commanded by the control signal to regulate a rotational speed of the rotatable shaft.

Systems and methods for providing an uninterruptible power supply to a ship-service bus of a marine vessel

Abstract: A marine vessel power and propulsion system that provides a vessel-wide uninterruptible power supply is described The power and propulsion system includes a propulsion system including a prime mover coupled to a motor/generator and a propulsion device The motor/generator is configured to be driven by the prime mover and to generate alternating current (AC) electric power The power and propulsion system also includes a ship-service electrical system including a generator set and a ship-service bus The generator set is configured to generate ship-service electric power for distribution over the ship-service bus The power and propulsion system also includes a bi-directional converter configured to couple the propulsion system to the ship-service electrical system and to convert AC electric power generated by the propulsion system to ship-service electric power for distribution over the ship-service electrical system

Improvement in ship propulsion engine fuel efficiency

Abstract: A propulsion system for a vessel is provided, which comprises at least two generator sets, each including an prime mover and a generator, an electric propulsion unit, an energy storage, and a main switchboard by which the at least two generator sets, the electric propulsion unit and the energy storage are connected to each other. Excess electrical power is stored in the energy storage when the generator produces electric power in excess for the instantaneous needs of the vessel, and needed additional energy is taken from the energy storage for the use of the ship electricity network when the electric generator produces electric power instantaneously insufficiently, and the generator of one of the two generator sets is operated as a phase compensator for supplying reactive power to the propulsion system.

Apparatus and method for power production, control, and/or telematics, suitable for use with locomotives

Abstract: A power system housed in one or more modules or containers may be located as a unitary structure where desired, for example secured to a locomotive platform, allowing easy retrofits. A control subsystem may maintain an RPM of a prime mover at minimum that still provides an expected level of power from an electric machine for any one of a finite number of throttle settings. The control subsystem may dynamically adjust loads between various combinations of series and/or parallel couplings. A set of processor executable instructions may be configured for specific platforms by selecting appropriate set of values based on number of loads (e.g., driven axles), rating (e.g., horse power), other criteria (e.g., manufacturer, model, year). Characteristics may be determined and verified, and operation based on the outcome of such. A telematics system method logs and provides remote access to operational data, engine data, power system data, anti-idling overrides, unauthorized changes, and/or location.

Artificial lift fluid system

Abstract: An artificial lift fluid system for use in a wellbore with a casing engaging a well head can include a prime mover in communication with a variable frequency drive controller, or connected with a throttle, sensors, and a programmable logic controller for optimizing production from the wellbore by comparing data with preset production parameters. The artificial lift fluid system can include upper bearings connected to the prime mover, and an on-off tool connected with a shaft. The shaft can be engaged with the upper bearings, prime mover, and the on-off tool. The on-off tool can be connected with the centrifugal pump. A seal can be engaged with the shaft, a bottom bearing can be connected with the centrifugal pump to support loads, and bushings can separate the on-off tool and shaft from tubing in the casing.

A power train for an amphibian

Abstract: The present invention provides, with reference to Figure 1, a power train for an amphibian, the power train comprising a first prime mover, a first land propulsion means, and a first marine propulsion means. The first prime mover is arranged to selectively drive the first land propulsion means, or the first marine propulsion means, or both. The power train further comprises a second prime mover. The second prime mover is arranged to selectively drive the first land propulsion means, or the first marine propulsion means, or both, either in place of the first prime mover or in addition thereto.