Experimental study on two-stage compression refrigeration/heat pump system with dual-cylinder rolling piston compressor

Thermodynamic analyses on an ejector enhanced CO2 transcritical heat pump cycle with vapor-injection

“…A C C E P T E D ACCEPTED MANUSCRIPT 6 vapor flow from the evaporator and achieved 4% and 3-5% higher heating COP and exergy efficiency over the conventional flash tank cycle, respectively. Chen et al [26] In this paper, an ejector enhanced sub-cooler vapor injection CO 2 heat pump cycle (ESCVI)…”

A Review on Sliding Vane and Rolling Piston Compressors

“…Experimental evaluations of the two-stage, dual cylinder rolling piston compressor were carried out which showed that it had higher cooling capacity and COP [209]. To improve performance, a novel capacity modulation method to control compressor operation depending on flowrate requirements was proposed [210] and better performance was obtained when compared to other systems [211].…”

Performance Analysis of Isentropic Fluid Based Vapor Compression Refrigeration in Different Weather Conditions in Northern India

“…When the mass fraction of nanoparticles increased to 1% in refrigerant, COP is found to be lower than from pure R134a and this factor would result in decrease in the refrigeration effect. Shuxue and Guoyuan [14] analyzed thermodynamic model on the two-stage compression refrigeration/heat pump system with vapor injection. The results of comprehensive experiment for the prototype in the study showed that the cooling capacity and cooling COP can increase 5-15% and 10-12%, respectively.…”