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Title:A Simple Approach to Performance Analysis of Alternative Refrigerant Rolling-Piston-Type Rotary Compressors
Author(s):Kim, M.H.; Bullard, C.W.
Subject(s):alternative refrigerants
rotary compressors
Abstract:A simple semi-empirical model for small rolling-piston-type rotary compressors using the most potential alternative refrigerants R-410A and R-407C including R-22 has been developed based on thermodynamic principles and large data sets from the compressor calorimeter test. The basic purpose of the compressor sub-model in a larger system model is to provide the refrigerant mass flow rate, power consumption and discharge states of the compressor using some given information. The input data are compressor geometry (displacement and clearance volume), compressor speed, suction pressure and temperature, discharge pressure, and ambient temperature as well as mass flow rate, power consumption, shell and discharge temperatures which are needed only for estimating the constants in the model. A mass flow rate model reflects clearance volumetric efficiency and simulates suction gas heating using an effectiveness method. Compressor work is calculated using the compressor efficiency represented by two empirical parameters. Compressor heat loss and a linear relationship between the discharge and shell temperatures are used for calculating the discharge temperature. The model proposed here is a general but simple and can predict the mass flow rate and power consumption and dis charge temperature within the RMS errors of ±3% and ±2.8°C, respectively.
Issue Date:2001-03
Publisher:Air Conditioning and Refrigeration Center. College of Engineering. University of Illinois at Urbana-Champaign.
Series/Report:Air Conditioning and Refrigeration Center CR-34
Genre:Technical Report
Date Available in IDEALS:2009-08-03

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