Tuesday August 27, 2019 from 15:40 to 17:00
EXPERIMENTAL ANALYSIS OF THE INTERMEDIATE CONDITIONS OF A VARIABLE SPEED VAPOR-INJECTION SCROLL COMPRESSOR WORKING WITH R-410A
Fernando Tello-Oquendo1, Bertrand Deschene 2, Emilio Navarro-Peris1, Jose Gonzalvez1, Vincent Lemort2.
1Universitat Politècnica de Valencia, Valencia, Spain; 2University of Liège, Liege, Belgium
This paper presents an experimental analysis of the intermediate conditions for a variable speed (VS) vapor-injection scroll compressor (SCVI) under several working conditions and speeds.
A set of experimental tests was conducted for a VS-SCVI working with R410A as a refrigerant. From the experimental data and based on previous correlations obtained for constant speed SCVI, a correlation for VS-SCVI was obtained to estimate the injection ratio depending on the compressor speed with an error lower than 10%. Results showed differences in the intermediate conditions of the compressor for low and high compressor speeds.
The correlation was checked with other sources of data available in the public literature obtaining similar deviations from the measured values. Finally, the optimum intermediate conditions for an injection heat pump with an economizer was determined under different external conditions. An improvement in COP up to 5% is observed from the theoretical analysis