Compressor, centrifugal reciprocating

Clay working machinery - Pug mills Compressors - Centrifugal Reciprocating, 3+ cylinders Conveyors - Heavy duly, NOT uniformly loaded... 

Compressors. There are two basic types of compressors centrifugal and reciprocating machines. The centrifugal compressor is usually used... 

Type Comparison. Reciprocating Compressors. Positive Displacement Rotary Compressors. Centrifugal Compressors. Axial Compressors. 

Compressor centrifugal, screw or reciprocating electric motor, steam turbine, or other driver... 

Centrifugal compressors increase gas pressure by accelerating the gas as it flows radially out from a rotating impeller. The increase in velocity is then converted to increase in pressure as the gas leaves the compression stage. Unlike reciprocating compressors, centrifugal compressors involve a constant flow through the compressor. 

The maximum efficiency of fans is 82-90%.34 Figure 8-8 gives the efficiency of reciprocating compressors. Centrifugal compressors are generally from 5-20% less efficient than reciprocating ones.30... 

Compressors 145 Centrifugals 145 Axial Flow Compressors 146 Reciprocating Compressors 146 Rotary Compressors 149... 

Table 2.8 Revamp options for reciprocating compressors, centrifugal fans, blowers, centrifugal pumps and electric motors.

Either of two methods can be used to take into account efficiency when calculating power requirements for compressors, whether they are centrifugal, reciprocating, or screw. One method is the polytropic method, based on the expression, PV" = constant during compression, where V is the gas volume and n is the polytropic coefficient, which lies between 1 and the specific heat ratio. 

Figure 16.9 Base f.o.b. purchase costs for centrifugal, reciprocating, and screw compressors.

Types of Compressor. Many different types of compression machinery are used in chlorine service. Low-pressirre and vacuitm applications are considered elsewhere (Section 9.1.12). For compression of the main process flow, we consider centrifugal, reciprocating, and rotary liquid-ring comfHessors. 

A typical performance curve of a centrifugal compressor in terms of head against flow is shown in Figure 6. Typical performance curves for axial compressor and reciprocating or rotary compressor are also shown in Figure 6. 

Canyover solid or liquid, polymer gas OFS compressor is known able to handle dirty gas vriih sold panicles, entrained liquidl or polymer gases. Centrifugal compressor can tolerate some solid or liquid, but OIS compressor and reciprocating compressor cannot tolerate solid, liquid, or polymer gases. 

Table 3 summarizes selection factors for centrifugal, reciprocating, and OIS and OFS compressors. [1]... 

Gas turbine driven centrifugal compressors are very efficient under the right operating conditions but require careful selection and demand higher levels of maintenance than reciprocating compressors. Compression facilities are generally the most expensive item in an upstream gas process facility. 

Motor-driven, multistage reciprocating compressors have reportedly been the most popular choice for aeroderivatives. Motor-driven, oil-fiooded screw compressors are also used in some cases. High horsepower, multistage centrifugal compressors, similar to those used at many pipeline compressor stations, may be required for the newer heavy-duty units if the distribution pipeline pressure is insufficient (see Pipelines). Gas turbines have more stringent fuel-gas specifications in terms of cleanliness than do gas-fired boilers. Thus oil- and water-knockout systems, coalescing filters, and fine-mesh filters are used. 

On a typical pipeline, compressor stations are located at 81—161-km intervals and may contain up to 15 compressors. These stations may use either gas-turbine, reciprocating-engine, and/or motor-driven centrifugal compressors capable of boosting pipeline pressure and keeping gas moving at an average speed of about 24 km/h. Gas-turbine-driven units are the most popular. 

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