Model analysis of a novel compressor with a dual chamber for high-efficiency systems

Abstract

In this study, a rotary type compressor with a novel structure based on the rolling piston type rotary compressor design was proposed to improve the cooling capacity and the mechanical efficiency, and its performance was analyzed. The novel structure utilized the inner space of the roller as additional working volume. Therefore, it was possible to compress more refrigerant under the same main dimensions of the compressor, and thus, the cooling capacity was improved. As a result, the cooling capacity of the proposed compressor increased by 31.28–37.99% compared to that of the conventional rolling piston type rotary compressor. Furthermore, the mechanical loss at the vane was reduced because of the structure—the vane is connected and fixed between the inner and outer cylinders. The mechanical efficiency of the proposed compressor improved by 4.34% at a pressure ratio of 3.4 and a rotation speed of 60 Hz. The input power of the proposed compressor increased by 13.53–31.68% compared to that of conventional compressor, depending on the operating conditions. The energy efficiency ratio (EER) of the proposed compressor increased by 4.5–16.64%.