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CAPACITY CONTROL OF SCREW COMPRESSOR UNITS.

Author(s) : LUNDBERG A.

Type of article: Article

Summary

THE AUTHOR DESCRIBES A PACKAGED WATER-CHILLER EQUIPPED WITH AN OPEN DRIVE SCREW COMPRESSOR, OIL SEPARATOR, CONDENSER, LIQUID PRE-COOLER (ECONOMISER), EVAPORATOR AND HEAT EXCHANGER. COMPRESSOR CAPACITY IS CONTROLLED BY A SLIDING VALVE SYSTEM ELECTRONICALLY OPERATED BY PI CONTROL USING CHILLED WATER TEMPERATURE OR, FOR A HEAT PUMP, CONDENSER WATER TEMPERATURE AS THE CONTROL SENSE. THE EXPANSION VALVE IS ELECTRIC MOTOR DRIVEN VIA ELECTRONIC CONTROL SENSING EVAPORATION PRESSURE, CHILLED WATER TEMPERATURE AND SUCTION VAPOUR TEMPERATURE. THE ECONOMY OF THIS SYSTEM IS ILLUSTRATED AND DISCUSSED. D.W.H.

Details

  • Original title: CAPACITY CONTROL OF SCREW COMPRESSOR UNITS.
  • Record ID : 1985-1903
  • Languages: English
  • Source: Heat. Aircond. Refrig. - vol. 16 - n. 6
  • Publication date: 1984/11

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