Showing papers on "Diesel generator published in 1989"

Aging mitigation and improved programs for nuclear service diesel generators

Abstract: Recent NRC sponsored aging research work on nuclear service diesel generators has resulted in a recommendation that an improved engine management program should be adopted for aging mitigation and reliability improvement. The center of attention should be to ensure diesel-generator operational readiness. This report emphasizes a healthy engine concept'' and recommends parameters to be monitored to determine engine condition. The proposed program and approach recommended in this report represent balanced management where diesel generator testing, inspections, monitoring, trending, training, and maintenance all have appropriate importance. Fast-starting and fast-loading test of nuclear service diesels causes very rapid wear of certain engine components. This report documents this aging and wear mechanism and recommends ways to largely eliminate this unique aging stressor. Current periodic intrusive maintenance and engine overhaul practice have been found to be less favorable for safety assurance than engine overhauls based on monitoring and trending results or on a need to correct specific engine defects. This report recommends that the periodic overhaul requirements be re-evaluated. Diesel generator research on aging and wear is sponsored by the US Nuclear Regulatory Commission (NRC), Office of Nuclear Regulatory Research. The research reported in this report was conducted by Pacific Northwest Laboratory (PNL), which more » is operated for the Department of Energy by Battelle Memorial Institute. 23 refs., 3 figs., 8 tabs. « less

Technological development and perspectives of the electric propulsion. energy efficiency in land transport. proceedings of a seminar organised by the commission of the european communities, directorate general for energy, luxembourg, may 16-18, 1988

Abstract: This article describes the evaluation of electrical vehicles carried out by the European research programme action cost 302, and then presents current research into the energy supply and propulsion systems of such vehicles. The objective of action cost 302 was to evaluate the environmental and economic impact of electric vehicles in order to provide a cost benefit analysis of this type of transport. The fuel conservation, environmental benefits, operational adequacy, manufacturing costs and technical advantages or otherwise of such vehicles are reviewed. New technical achievements and current research into energy supplies and propulsion systems are then described. Battery operated, hybrid and dual mode vehicles are discussed briefly. Special reference is made to a dual mode approach which integrates an electric propulsion system using a nickel cadmium battery with the possibility of utilizing 2 other sources of power: the external trolleybus network and an on board diesel generator unit. A further development of this system uses a propulsion system consisting of the integration of 4 permanent magnetic brushless motors into the wheels of the second and third axle. The advantages of such a system are described. For the covering abstract of the conference see IRRD 824263.

Wear and tear studies of oil-lubricated machines using energy-dispersive X-ray fluorescence spectrometry

Abstract: The wear of oil-lubricated machines was monitored by establishing a correlation between the wear rate of the machine and the concentration of heavy metal contaminants in the lubricating oils used. The concentrations of heavy metal contaminants in the oil were determined using energy-dispersive X-ray fluorescence spectrometry. To obtain a representative sample, the procedure for sample collection and preparation was standardized. Samples were collected from a 30 KVA diesel generator set at BARC-NRL at regular intervals. The concentrations of Fe, Cr and Ni were found to increase with increase in the number of hours in service.

Design and fabricate a metallic-hydride heat pump with a cooling capacity of 9000 Btu/h. Final report

Abstract: Existing environmental control equipment (ECE) for truck mounted electronic communication shelters are powered by Army generator sets. Fully 50% of the generated power is consumed by the ECE and innovative ECE, technology was sought to reduce this electrical load. The heat content of the diesel generator exhaust gas was viewed as a potential 'waste heat' source for thermally driven ECE systems. Metal-hydride heat pumps were proposed as for this application. The purpose of this contract was to produce a prototype metal-hydride air conditioner of 9000 BTU/H capacity and compare system size, weight, electric power requirements and performance with a Standard Army Air Conditioner of the same capacity.

Diesel generator plant

Abstract: PURPOSE:To make a turning gear eleminable by installing pipeline feeding a cylinder with air for turning operation use and a regulating valve, in a starting air system. CONSTITUTION:Compressed air stored in a starting air receiver 1 opens a starting air feed valve 2 at the time of starting a diesel generator, and inhales air in a cylinder 5 directly via an air distributing valve 3, thereby producing engine torque. Incidentally, a turning air feed valve 10 is operated for its open only at the time of inspection of a diesel generator, and a requisite amount of air is fed to the inside of the cylinder 5 via a turning air feeding pipeline 9 and the air distributing valve 3, driving an engine, and it is always closed after an inspection end. Consequently, there is unnecessary to install a turning gear separately, and related equipment such as the power source of the like is also reducible.

Optimization of equipments size of photovoltaic power system with diesel generator

Abstract: Power generation plant in the remote islands involves many problems such as the maintenance, instability of fuel supply and the generation cost, etc.. One method to remedy these is a solar cell/diesel hybrid system consisting of a solar cell, a battery and a diesel generator. For a photovoltaic generation system for remote islands, it is necessary (a) to increase the fuel saving per plant capacity and (b) to reduce the fuel consumption. This report examines the item (a) on a hybrid system of AC parallel system wherein a solar cell and a diesel generator are combined by AAC by examining an optimum capacity of the solar cell, the battery and the diesel generator. As a result, it was concluded that the capacity combinatiion of the solar cell and the battery lies in relatively small region of the solar cell capacity; economically speaking, a system with relatively less dependency on the solar light is more advantageous. 7 refs., 11 figs., 1 tab.

Emergency power source for nuclear power facility

Abstract: PURPOSE:To obtain a power source, which is not cur off during the starting time of a diesel generator and has high reliability and large capacity, by feeding power from a superconducting coil cell during the starting time of the diesel generator. CONSTITUTION:Emergency diesel generators 104A-104C are installed into a nuclear power plant as power sources for backing up a main generator 100 while superconducting coil cells 105A-105C are mounted. Power is fed from the superconducting coil cells 105A-105C during the time when the diesel generators 104A-104C rise at the time of emergency. Accordingly, power can be supplied under an uninterruptive state at all times, and reliability can be improved. A sufficient capacity can be ensured.

Overload protection in parallel operation of diesel generator

Abstract: PURPOSE:To protect a diesel generator for overload in whatever the constitution of a power system it may be, by parallelling it off from a power bus bar due to the speed reduction of the diesel generator CONSTITUTION:An external power source 1 and a diesel generator 12 are combined through circuit breakers 8, 9 and 11 and feeds current to loads 5 and 7 through an external power bus bar 3 and a diesel bus bar 10 The diesel generator 12 is driven by a diesel engine 13 and its speed is controlled by a governor 14a with a drooping characteristic The overload of the diesel generator is discriminated by detecting the speed of the diesel generator with a speed detector 14b If found overloaded, the generator is prevented against overload by breaking off the breakers 9 and 11 as required

Secure power supplies for British Telecom's major computer centres

Abstract: The author describes how British Telecom provides no-break AC power to its biggest multi-office computerization project, Customer Services Systems, in almost thirty district offices. The new Customer Services Systems installations were provided with secure AC power supplies consisting of standby diesel generator, static UPS (uninterruptible power supply), and n+1 redundant frequency converters. The power systems procurement and installation standards have been managed by the part-time efforts of a small unit in the Head Office. Call-off contracts were established for all the major power supply equipment leading to economies of scale and a high degree of standardization. Several potential problems have been avoided by design and attention to the effects of one machine on another. For example, it is noted that sealed lead-acid batteries with voltages around 450 V can be installed safely in plant rooms provided precautions are observed. >