COMPARISON OF THE CHARACTERISTICS OF LOW-TEMPERATURE SCROLL COMPRESSORS FOR HEAT PUMP APPLICATIONS

摘要

Ceteris paribus, the efficiency of heat pumps is higher in the systems with moderate temperature levels for heat consumers. The selection of a scroll compressor for a low-temperature heat pump is defined by its operating characteristics which include isentropic efficiency, feed coefficient and compression ratio. To demonstrate the manufacturer's specifications for low-temperature scroll compressors, the authors investigated the compressors of three manufacturers: Copeland, Danfoss and Invotech. The study of low-temperature compressors was carried out in the range of refrigerant boiling temperatures from 0 to minus 40 degrees C (in increments of 5 degrees C). The obtained data were used to plot diagrams of respective dependences for various compressor models.