The Power Block

The Power Block in the IGCC plant is essentially a gas turbine unit that operates on syngas. This gas turbine unit is basically the same as that used for natural gas with certain modifications. The areas that are modified and also that need to be critically evaluated for use with syngas are  

The gas turbine/combined cycle (GTCC) technology has been proven for use with natural gas as well as with syngas. 

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Two PRISM reactor modules are paired to form one power block. A PRISM power block is shown in Figure 6.1. The power block suppUes steam for one 622 MWe turbine generator. Plant electrical output can be tailored to local needs by the modular addition of power blocks. 

The building of the power block was idealized with a FEM model consisting of 28.068 elements with 104.287 DOF (Figs. 2 and 3). 

Fig. 1 shows the block diagram of the vibrometer, in which the most sensible to small phase variations interferometric scheme is employed. It consists of the microwave and the display units. The display unit consists of the power supply 1, controller 2 of the phase modulator 3, microprocessor unit 9 and low-frequency amplifier 10. The microwave unit contains the electromechanical phase modulator 3, a solid-state microwave oscillator 4, an attenuator 5, a bidirectional coupler 6, a horn antenna 7 and a microwave detector 11. The horn antenna is used for transmitting the microwave and receiving the reflected signal, which is mixed with the reference signal in the bidirectional coupler. In the reference channel the electromechanical phase modulator is used to provide automatic calibration of the instrument. To adjust the antenna beam to the object under test, the microwave unit is placed on the platform which can be shifted in vertical and horizontal planes. 

The electronic block, which includes block of the analysis and registration and control system engines, and block of the source-receiver of acoustic oscillations are universal for any installations of this type. As the source-receiver of acoustic oscillations the ultrasonic flow detector is usually use. It s, as a rule, the serial devices for example y/f2-12. The electronic block contains the microprocessor device or PC, device of the power supply and management of engines... 

Roller conveyors are quite frequently powered, the simplest method being use of a pressure belt in contact with the lower surface of the rolls. A special ripple belt with raised pads is capable of starting up the load but does not build up excessive blocked pressure if the line fills up. Other similar drives are available, with varying degrees of control over the applied power. Most expensive of the powered roller units are those in which each roll is equipped with V-belt or chain drives. Pusher bars suspended from overhead chain conveyors may also be used to move containers along a roller hne. 

A Generalized Design Approach to Power Supplies Introducing the Building-block Approach to Power Supply Design... 

Figure 3-7 The functional block diagram for a PWM switching power supply,...

The Building-block Approach to PWM Switching Power Supply Design 26... 

You can quickly identify these plant sections by reviewing process flow diagrams and valving arrangements. Isolation points are defined by control valves or powered block valves that can be remotely activated. Process hazard analysis techniques help you identify the maximum credible accident scenarios. (Note that manual valves should not be considered reliable isolation points unless they are located to be accessible following a major accident. However, remotely-activated valves can only be considered reliable isolation points if there are adequate reliability engineering and maintenance programs in place.)... 

It is required that the drawworks input power be able to lift 600,000 lb at a rate of 50 ft/min. There are eight working lines between the traveling block and the crown block. Three input power systems are available 1,100, 1,400, and 1,800 hp. Which of the three will be the most appropriate The value of e is... 

The second method of improving the power factor of an installation is to provide static capacitor banks. These can be installed as a single block at the point of supply busbar, as a set of switchable banks or as individual units connected to specific loads. For an installation where no synchronous machines are installed for other purposes (i.e. as prime movers or generators) then static capacitor banks are almost invariably the most cost-effective way of improving the power factor. 

AMCP 706-177 (1971) gives the power of PETN as 145% of TNT in the Ballistic Mortar and 173% of TNT in the Trauzl block. It also lists PETN s brisance at 1.5g/cc as 129% of TNT as detd in plate dent test. The Russians use a somewhat different measure of power which they call total efficiency . This involves computing expln product expansion to 1 atm. Andreev Belyaev (Ref 25, p 655) list the total efficiency of 1.6g/cc PETN as 134% of TNT... 

VIII. Explosive Characteristics. Picric Acid is generally considered to be a relatively insensi tive but brisant expl. On a qualitative sensitivity scale of comparing common expls, PA would be judged to be more sensitive than TNT but appreciably less sensitive than Tetryl. Its power and brisance are also similar to those of TNT (112% TNT in the Ballistic Mortar 101% of TNT in the Trauzl Block and 107% in the plate dent test (Ref 48). In this section we will consider the steady detonation parameters. initiation characteristics and potential hazards of PA... 

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