compressor selection and sizing

[...]... Displacement Compressors IX Axial-Flow 60- 50 Compressors Centrifugal Compressors 60 70 80 90 100 110 120 PERCENT FLOW Figure 1-3 General performance curve for axial flow, centrifugal, and positive isplacement Compressors: Selection and Sizing Intermittent Mode Compressors Reciprocating Compressors The reciprocating compressor is probably the best known and the most widely used of all compressors It... helical-lobe compressor is the most ophisticated and versatile of the rotary compressor group and operates at he highest rotor tip Mach number of any of the compressors in the rotary amily This compressor is usually referred to as the "screw compressor" r the "SRM compressor. " The application range of the helical-lobe compressor is unique in that bridges the application gap between the centrifugal compressor and. .. extended to 20 psi The sliding-vane compressor uses a single rotating element (see Figure 1-8) The rotor is mounted eccentric to the center of the cylinder portion f the casing and is slotted and fitted with vanes The vanes are free to Compressors: Selection and Sizing Figure 1-8 Cross section of a sliding vane compressor (Courtesy of A-C Compressor Corporation) move in and out within the slots as the... perform the compression in an intermittent mode 3 They do not use inlet and discharge valves The helical and spiral-lobe compressors are generally similar and use wo intermeshing helical or spiral lobes to compress gas between the obes and the rotor chamber of the casing The compression cycle begins Compressors: Selection and Sizing s the open part of the spiral form of the rotors passes over the inlet... 1-1 Chart of compressor types Overview diagrams the relationship of the various compressors by type Figure 1-2 hows the typical application range of each compressor, and Figure 1-3 ompares the characteristic curves of the dynamic compressors, axial and entrifugal, with positive displacement compressors 200 o < DC yj QC 3 Ul cc a FLOW RATE (CFM) Figure 1-2 Typical application ranges of compressor types... referred to as side- 2 Compressors: Selection and Sizing treams Pressures of the multistage machine are quite varied, and difficult o generalize because of the many factors that control pressure Centrifuals are in service at relatively high pressures up to 10,000 psi either as a ooster or as the result of multiple compressors operating in series Axial compressors are large-volume compressors that are... is ingested by the compressor, acted upon, and discharged, efore the cycle is repeated The continuous compression mode is one in which the gas is moved into the compressor, is acted upon, moved hrough the compressor, and discharged without interruption of the flow t any point in the process Compressors using the intermittent compression mode are referred to s positive displacement compressors, of which... single-stage compressor When multiple ylinders on a common frame are connected in series, usually through a ooler, the arrangement is referred to as a multistage compressor Figures 1–4 and 1-5 are typical reciprocating compressor arrangements, beginning with the single-stage and ending with a more complex multistage Figure 1-4 A three-stage single-acting reciprocating compressor (Courtesy of ngersoll Rand)... Compression Compressors Ejectors Continuous compression compressors are of two types: ejector and dynamic The ejector can first be identified as having no moving parts (see Figure 1–10) It is used primarily for that feature as it is not as efficient as most of he mechanical compressors Simplicity and the lack of wearing parts conribute to the unit's inherent reliability and low-maintenance expense 0 Compressors:... pressure the compressor can generate The dynamic compressors are urther subdivided into three categories, based primarily on the direction f flow through the machine These are radial, axial, and mixed flow The radial-flow, or centrifugal compressor is a widely used compresor and is probably second only to the reciprocating compressor in usage n the process industries A typical multistage centrifugal compressor . Cycle Compressors 4 Reciprocating Compressors. Rotary Compressors. Continuous Compression Compressors 9 Ejectors. Dynamic Compressors. 2. Basic Relationships 14 Introduction 14 Gas and . pulp and paper, and utilities. A few typical applications are air separation, vapor extraction, refrigeration, steam recompression, process and plant air. 2 Compressors: Selection and . Accessories. Lube and Seal System. Drivers. Gear Units. Couplings. Mounting Plates. Controls and Instrumentation. Inspection and Testing. Vendor Data. Guarantee and Warranty. Bid and Quotation