Inlet casing

Figure 5-13. The Elliott TH expander is a single-stage hot gas expander with an axial inlet and vertical exhaust. The TH-line expanders range in horsepower from 4,000 to 50,000 and are of overhung rotor construction. The expander consists of four major components the inlet casing and its supports, the exhaust casing, the bearing housing and support system, and the rotor.

Fig ure 5-15. The inlet support, with the trunnion blocks, supports the inlet casing and is designed for thermal expansion of the casing while maintaining the centerline of the unit. 

Fig ure 5-22. Upstream view of the inlet casing assembly. The nose cone is supported by struts that also allow entry of cooling steam and instrumentation into the cone. 

Two 1-in., Class 300 borescope connections shall be provided on the inlet casing to inspect the condition of the stator blades and the upstream side of the rotor blades during periods the expander is shut down without disassembly to the expander. 

SOLUTION A liquid mixture flowing in a tube is subjected to uniform wall heat flux. The friction coefficients are to be determined for the bell-mouth and square-edged inlet cases. 

Square-Edged Inlet Case For this inlet shape, the Reynolds nurnber of the.flow Is the same as that of the bell-mouth inlet (Re = 7651), However, it is necessary to check the type of flow regime for this particular inlet with 8 kW/rn of heating. From Table 8-6, the transition Reynolds number range for this case is 3860 < Re < 5200, which means that the flow in this case is turbulent and Eq. 8-80 is the appropriate equation to use. It gives... 

Case 1 uses the same fuel rod diameter and pitch as for a commercial PWR but the rod was assumed to be composed of plutonium-aluminum fuel clad with aluminum. A core inlet pressure of 0.398 MPa (57.7 psia) was assumed, based on an atmospheric pressure condition at the top of the heat exchanger and the gravity-generated static pressure head at the core inlet. Case 1 shows the standard, but elongated, reactor configuration is capable of removing 655 MW under the assumed constraints. 

Paint and corrosion damage in air inlet manifolds. Some users are claiming that the corrosion protective paint applied originally inside the air inlet casing softens and some detaching paint spots are deposited by the airstream on IGVs due to frequent online washings, possibly because of the chemistry involved in the cleaner. 

Phenylacetylene. Support a 5-litre glass Dewar flask in a wooden case. Equip the flask with a lid of clear Perspex, provided with suitable apertures for a mechanical stirrer, introducing solids (e.g., sodium) or hquids, a calibrated dip stick for measuring the volume of liquid in the Dewar vessel, a gas mlet tube and an ammonia inlet arrange for an electric light to shine downwards into the flask. 

Apparatus 1-1 three-necked, round-bottomed flask with a dropping funnel combined with a gas inlet, a mechanical stirrer and a reflux condenser in the case of CHjMgBr, however, the apparatus in Fig. 1 is used. 

Apart from ES and APCI being excellent ion sources/inlet systems for polar, thermally unstable, high-molecular-mass substances eluting from an LC or a CE column, they can also be used for stand-alone solutions of substances of high to low molecular mass. In these cases, a solution of the sample substance is placed in a short length of capillary tubing and is then sprayed from there into the mass spectrometer. 

The choice of a mass spectrometer to fulfill any particular task must take into account the nature of the substances to be examined, the degree of separation required for mixtures, the types of ion source and inlet systems, and the types of mass analyzer. Once these individual requirements have been defined, it is much easier to discriminate among the numerous commercial instruments that are available. Once suitable mass spectrometers have been identified, it is then often a case of balancing capital and running costs, reUability, ea.se of routine use, after-sales service, and manufacturer reputation. 

In the second bounding case (Fig. 3b) the thermal capacity rate of the cold stream is much greater than that of the hot stream. Then, the minimum outlet temperature attainable by the hot stream would be the inlet temperature of the cold stream, and therefore ... 

A numerical study of the effect of area ratio on the flow distribution in parallel flow manifolds used in a Hquid cooling module for electronic packaging demonstrate the useflilness of such a computational fluid dynamic code. The manifolds have rectangular headers and channels divided with thin baffles, as shown in Figure 12. Because the flow is laminar in small heat exchangers designed for electronic packaging or biochemical process, the inlet Reynolds numbers of 5, 50, and 250 were used for three different area ratio cases, ie, AR = 4, 8, and 16. 

The flow distribution in a manifold is highly dependent on the Reynolds number. Figure 14b shows the flow distribution curves for different Reynolds number cases in a manifold. When the Reynolds number is increased, the flow rates in the channels near the entrance, ie, channel no. 1—4, decrease. Those near the end of the dividing header, ie, channel no. 6—8, increase. This is because high inlet velocity tends to drive fluid toward the end of the dividing header, ie, inertia effect. 

Pre-Keformer A pre-reformer is based on the concept of shifting reforming duty away from the direct-fired reformer, thereby reducing the duty of the latter. The pre-reformer usually occurs at about 500°C inlet over an adiabatic fixed bed of special reforming catalyst, such as sulfated nickel, and uses heat recovered from the convection section of the reformer. The process may be attractive in case of plant retrofits to increase reforming capacity or in cases where the feedsock contains heavier components. 

The second step is to disperse the core material being encapsulated in the solution of shell material. The core material usually is a hydrophobic or water-knmiscible oil, although soHd powders have been encapsulated. A suitable emulsifier is used to aid formation of the dispersion or emulsion. In the case of oil core materials, the oil phase is typically reduced to a drop size of 1—3 p.m. Once a suitable dispersion or emulsion has been prepared, it is sprayed into a heated chamber. The small droplets produced have a high surface area and are rapidly converted by desolvation in the chamber to a fine powder. Residence time in the spray-drying chamber is 30 s or less. Inlet and outlet air temperatures are important process parameters as is relative humidity of the inlet air stream. 

Most gas-fired, heavy-duty gas turbines installed as of 1996 operate at gas pressures between 1.2 and 1.7 MPa (180—250 psig). However, aero derivative gas turbines and newer heavy-duty units can have such high air-inlet compression ratios as to require booster compressors to raise gas inlet pressures, in some cases as high as 5.2 MPa (750 psig). 

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