Power Range

Most of the advantages of MCB technology can be used to make small anode-grounded metal-ceramic X-ray tubes as well. These could be water- or air-cooled and reach power ranges up to 1 kW at voltages up to lOOkV. 

Discharges initiate in the gap region between the electrodes and then spread into surface discharges at the surface of the dielectric layer. The bright surface discharges are on the order of a few mm in diameter and the power ranges from these lamps can be from a few watts to several kilowatts over a... 

Rietz disintegrators are normally supplied in rotor diameters from 10 to 60 cm (4 to 24 in), with rotational speeds to produce hammer tip speeds in ranges of 300 to 6700 m/min (1000 to 22,000 ft/min) and power ranges from 0.4 to 1.50 kW (V2 to 200 hp). Higher speeds and higher power are available. AC variable-frequency drives can eliminate belts and provide easier variation of speed. Models are available... 

The Andritz-Sprout-Bauer attrition miU (Fig. 20-51) is available in single- and double-runner models with 30- to 91-cm- (12- to 36-in.-) diameter disks and with power ranging up to 750 kW (1000 hp). By the use of a variety of plates and sheirconstruciions these units are represented in such applications as coarse granulating, piilveriz-ing, and shredding. 

In each case, the primary objective of turboexpanders is to conserve energy. Contemporary turboexpanders do this either by recovering energy from cold gas (cryogenic type) or from hot gases at temperatures of over 1,000 degrees. Current commercial models exist in the power range of 75 kW to 25-i- MW, so many applications are possible. 

Retrieval by output power. In this mode, the user should input the output power range of interest and thus obtain only data applying to that particular power setting. In this manner, he has only to consider the pertinent data to pinpoint the problem areas. 

Topology Power Range (W) n(dc) Range In/Out Isolation Typical Efficiency (%) Relative Parts Cost... 

The cost of a remote repair facility ranges from about 500,000 to 730,000, depending on the beam energy and power required. The current power range available for a portable accelerator is 45 to 300 W, with the energies varying from 1.5 to 9 MeV. 

The flow changes from laminar to turbulent in the range of Reynolds numbers from 2,100 to 4,000 [60]. In laminar flow, the friction pressure losses are proportional to the average flow velocity. In turbulent flow, the losses are proportional to the velocity to a power ranging from 1.7 to 2.0. 

Type of drive Power range (kW) Speeds Drive efficiency (%) Overall efficiency (%) including motor Power factor Main characteristics related to pump drives... 

Limited power range Careful maintenance essential. Life limitations... 

Limited power range. Limited life. Careful lubrication and maintenance essential... 

High speed expensive. Harmonics generation needs consideration. More maintenance than induction motors Limited power range. Low efficiency at reduced speed. Only speed reduction possible. Requires at least 30% derating of motor Automatic control expensive. Movable brush gear... 

Energy conversion method Efficiency (%) Power range (MW) Lifetime (years) Cost ( /kW) Environmental Safety... 

FCS curves for the quantum dots with mono-dispersity were obtained at various excitation laser powers ranging from 10 to 200 j,W. Figure 8.12 shows an autocor-... 

SUMMARIZE the operation of typical source, intermediate, and power range nuclear instruments. 

STATE the reason gamma compensation is NOT required in the power range. 

Given a block diagram of a typical power range instrument, STATE the purpose of major components. 

This term refers to a measurement or quantity that is capable of being represented on a scale (i.e., neutron flux on source range, intermediate range, and power range meters). 

The source range uses a proportional counter. The intermediate range uses a compensated ion chamber. The power range uses an uncompensated ion chamber. Terms used to describe the electrical circuits are summarized below. 

Three ranges are used to monitor the power level of a reactor throughout the full range of reactor operation. The power range makes use of an uncompensated ion chamber. 

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