Theoretical investigation of vapor mass fraction measurement methods for two-phase injection compression

10th International Conference on Compressors and their Systems

Moesch, T.W.^1 ; Lumpkin, D.^2,3 ; Thomas, C.^1 ; Hesse, U.^1 ; Groll, E.^3

Bitzer Deparment of Refrigeration, Cryogenics and Compressor Technology, Institute of Power Engineering, Technische Universität Dresden, Dresden, Germany^1

School of Civil Engineering, Purdue University, West Lafayette

IN, United States^2

School of Mechanical Engineering, Ray W. Herrick Laboratories, Purdue University, West Lafayette

IN, United States^3

关键词: Compression chambers;    Discharge temperature;    Injection compression;    Propagation of uncertainties;    Refrigerant mixtures;    Refrigerant vapors;    Theoretical investigations;    Vapor compression refrigeration system;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/232/1/012089/pdf
DOI  :  10.1088/1757-899X/232/1/012089

来源: IOP

【 摘 要 】

The economized vapor injection (EVI) method is used to decrease the discharge temperature of scroll compressors and to improve the cycle performance of vapor compression refrigeration systems by directly injecting refrigerant vapor into the compression chamber. In previous studies, the optimal cycle performance for an air conditioning system using EVI was detected during two-phase injection. However, the exact vapor mass fraction could not be measured directly. For further investigations on two-phase injection systems, accurate vapor mass fraction (VMF) measurements need to be conducted. This paper compares different options for the VMF measurement using pure refrigerants or refrigerant mixtures. It focuses on the achievable accuracy of the VMF measurement, based on the propagation of uncertainty.