RECIPROCATING COMPRESSOR（往复式压缩机）.docVIP

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RECIPROCATING COMPRESSOR（往复式压缩机）.doc

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RECIPROCATING COMPRESSOR（往复式压缩机）

ADVANTAGE DISADVANTAGE RECIPROCATING High Compression Ratio - Limitation is Controlled By Discharge Temperature ( Adiabatic Compression ) Complex Foundation and Piping Design - Suction ? Discharge??? Pulsation? Surpression?? ?? Device? ???? Fatigue Failure? ??? ? ??? Piping Design? ??? ? Constant Volume , Variable Pressure - Treating fairy constant volume at a wide range of pressure Pulsating Flow - Flow ??? ??? ? ????? ??? ??? ??? ??? ????? ? Molecular Weight Flexibility - H2?? Heavy Hydro carbon?? High Compression Ratio ?? ?? Vulnerable to Dirt and Liquid - Packing , Rings , Valve ?? Dirt? Liquid? ?? ???? S/U?? ?? Cleaning? ???? Suction Vessel? Liquid Entrainment? Condensation? ??? ??? Design??? ? Easy Maintenance - Dynamic Machine?? ??? ??? ??? ?? High Maintenance Cost - ?? $35 / BHP ??? ????? ??? High Efficiency - Low Flow , Wide Molecular Weight Range??? ??? ?? Large Area needed to install - ????? Size? ?? ??? ?? ??? ?? ??? Not Adequate for Large Volume Application - Large Volume? ???? ???? ?? ???? ?????? ??? ???? ?? Lubrication Contamination Torsional Implications - Pulsating Torque? ?? Driver Train ?? Electrical Circuit? ??? ??? CENTRIFUGAL High Reliability , Low maintenance - ????? ? 5???? Narrow Molecular Weight Range - Variable Speed Driver? ?????? Molecular Weight Variance? ????? Control ? ? ?? Large Volume Capability - 4~6 Feet? Diameter Barrel?? 8~10?? ???? ?? Recipro cating? ???? ??? Inefficiency at Low Flow - 1,000 acfm??? ??? ?? Reciprocating? ? 20~30% ?? Power? ? ??? More Safe to Liquid and Dirt than Reciprocating - ??? Dirt? Liquid? Valve? ??? ???? ?????. ?? Refinery??? ??? Washing? ??? Existance of Low Flow Limitations - ??? ???? ? 400~600 acfm??? ??? Smooth Flow - Flow??? ?? ?? ? ?? ???? Design? ?? Existance of Surge Area - Surging? Compressor? Damage? ????? Control? ??? ADVANTAGE DISADVANTAGE Centrifugal Wide Capacity Range - ?? ??? ????? ?? ??? ???? ??? ?? ??? Low Compression Ratio for Low Molecular Weight Saf