Performance comparison of liquid, vapor, and liquid–vapor injection of single-screw compressor for an air-source heat pump

• DOI: 10.1063/5.0205332
• Publication Date: 2024-05-16T16:11:19Z
• Authors: Qiangyu Wen; Ruiping Zhi; Yuting Wu; Biao Lei; Yanjun Du
• Keywords: Vapor-compression evaporation

Refrigerant injection techniques are usually proposed to improve the performance and reliability of compressors when a single-screw compressor applied an air-source heat pump works at low temperatures in winter. In this study, experimental study was conducted present comparison under liquid, vapor, liquid–vapor refrigerant evaporation between −19 −8 °C. The results indicate that, temperature decreases from °C, heating capacity vapor increases by 16.7% 12.7%, respectively, compared with that liquid COPh increment is, 11.23% 39.21% 17.18% 30.82% injection. Therefore, method is conducive operation lower ambient temperature. can provide basis for future design pumps.