Generator sets

With respect to fuels utilized as heating fuels for industrial furnaces, or as motor fuels for large diesel engines such as those in ships or power generation sets, the characteristics of primary importance are viscosity, sulfur content and the content of extremely heavy materials (asphaltenes) whose combustion can cause high emissions of particulates which are incompatible with antipollution legislation. 

BE-7269 Protection and monitoring systems for hydroelectric generating sets Mr. F. Arregui IBERDROLA Tecnologiaa da... 

The alternative approach is to use the computational equivalent of a chemical reaction, or reaction transform. Here, one does not need to define a common template or to generate sets of clipped reagents. Rather, the library can be enumerated using as input the initial reagent structures and the chemical transforms required to operate upon them. In this... 

One of the oldest adjustable-speed drives is the Ward-Leonard system. This consists of an ac to dc motor-generator set and a shunt or compound-wound dc motor. Speed is adjusted by changing the generator voltage. A functional equivalent of this drive uses an adjustable-voltage rectifier feeding a dc motor. This system has only one rotating machine in contrast to the three of a conventional Ward-Leonard system. 

Figure 16.1 Diesel generator set (Courtesy Kirloskar Electric)...

Captive (emergency) power generation covers the application of a diesel generating set, its starting, protection, synchronizing and load sharing. This forms an important part of power distribution at any installation to provide a standby source of supply,... 

Load sharing or selective load shedding is of interest to many users of hot gas expanders. A particularly successful European FCC application is illustrated in Figure 6-43. The addition of an expander-generator set to the FCC unit at a major refinery presented a challenge because a trip of the expander could upset the process. The company that is the subject of this application case study, GHH Borsig, solved this problem with the installation of a computerized control system and through computer simulation of trips. 

Steam, gas and hydraulic turbines, and turbine generator set units... 

In the ease of an offshore facility, electrical power is generally ge ated on site by engine- or turbine-driven generator sets using natural or diesel as fuel. Most installations are designed to handle the total e tri. 1 even if one generator is out of service. To minimize the siz st quipment, some facilities have a system to automatically f... 

Advise of exciter power characteristics available, or specify manufacturer to provide required exciter (small synchronous motors may use permanent magnets) as direct-connected, belt-driven, or motor-generator set. 

For speed ranges of 3 to 1 or greater, adjustable-voltage operation is recommended. The adjustable-voltage drive usually includes a motor-generator set to supply an adjustable voltage supply to the armature of the drive motor. With this method of operation, a speed range of 10 to 1 readily obtained. 

A key issue also concerns the foundation requirements of the generator set. Most manufacturers will provide data on their machines requirements, but the detailed design of the block and its interface with the engine bedplate require close attention. Sometimes it is possible to provide... 

Figure 15.29 The layout of a typical diesel generator engine room. 1 Diesel generator set 2 jacket water header tank 3 lubricating oil service tank 4 air receiver 5 diesel-driven compressor 6 batteries and charger 7 engine control panel 8 pneumatic control panel 9 fuel oil control panel 10 engine exhaust silencer 11 charge air filter 12 daily service fuel oil tank 13 three-section radiator...

Manufacturers now offer as standard microprocessor-based control systems as part of their gas turbine generator set. The set can therefore be controlled and monitored from panels adjacent to the machine or, if required, remotely from a central control room. In combined-cycle installations, the system would be linked into the... 

Almost every unique frequency contained in the vibration signature of a machine-train can be directly attributed to a corresponding mechanical motion within the machine. For example, the constant endplay or axial movement of the rotating element in a motor-generator set generates elevated amplitude at the fundamental (lx), second harmonic (2x), and third harmonic (3x) of the shaft s true running speed. In addition, this movement increases the axial amplitude of the fundamental (lx) frequency. 

The high voltage is obtained either by a step-up transformer from the mains, or a motor-generator set, or alternatively from batteries and a vibrator with a high-tension coil. The battery-operated instruments, are most popular as they are easily portable and most suited for field use. Such an instrument is illustrated in Fig. 10.53. 

There are therefore four adjustable parameters per atom in the refinement (xy, yy, Zj, By). In the computer experiments we have carried out to test the assumptions of the nucleic acid refinement model we have generated sets of observed structure factors F (Q), from the Z-DNA molecular dynamics trajectories. The thermal averaging implicit in Equation III.3 is accomplished by averaging the atomic structure factors obtained from coordinate sets sampled along the molecular dynamics trajectories at each temperature ... 

Figure 23.10a illustrates the relationship between turbine efficiency and mass flow through the turbine. Because hMECH his, the major contribution to the nonlinear trend of the overall efficiency with part-load is from the isentropic efficiency his A turbine model needs to capture this behavior. It should also be noted that there will be an efficiency associated with an electricity generating set coupled to the steam turbine (typically 95 to 98%). 

Fig. 1.18 General view of the Pulsar system. Each applicator is connected to one or two microwave generators set in both side parts of the equipment (courtesy of MES company).

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