Experimental study of a novel double temperature chiller based on R32/R236fa. (15th September 2016)

• Record Type: Journal Article
• Authors: Liu, Jian; She, Xiaohui; Zhang, Xiaosong; Man, Liang; Zhou, Wei
• Is Part Of: Energy conversion and management. Volume 124(2016)
• Page Start: 618
• Page End: 626
• Publication Date: 2016-09-15
• Subjects: Zeotropic refrigerant -- Water chiller -- Double temperature -- Mass fraction -- THIC; Direct energy conversion -- Periodicals; Energy storage -- Periodicals; Energy transfer -- Periodicals; Énergie -- Conversion directe -- Périodiques; Direct energy conversion; Periodicals; 621.3105
• DOI: 10.1016/j.enconman.2016.06.023
• Languages: English
• ISSNs: 0196-8904

Abstract

Highlights: A novel double-temperature chiller with zeotropic mixture R32 / R236fa is proposed. The chiller is applicable for temperature and humidity independent control system. Effects of mass fraction, fluid flow rate and temperature on chiller are studied. The suggested mass fraction of R32 is around 60%. The maximum COP and refrigerating capacity are 4.17 and 4.49 kW, respectively. Abstract: A novel double-temperature chiller with zeotropic mixture R32/R236fa is proposed in this paper, and chilled water with two different temperatures is produced, such as low temperature water ( TL, out = 7 °C) and high temperature water ( TH, out = 16 °C). An experimental setup is established to test the performance of the chiller. Effects of mass fraction of R32 in mixture R32/R236fa ( M (R32)), TL, out, TH, out and the heat transfer media flow rate on the performance of the chiller are studied. When TH, out is 18 °C, TL, out is 8 °C and M (R32) is 0.6, COP and refrigerating capacity are 4.11 and 4.42 kW, respectively. COP and refrigerating capacity increase as M (R32) increases. Exhausting pressure of the chiller increases with the increase of M (R32). As M (R32) is 0.6, exhausting pressure is about 1.95 MPa. Compression ratio decreases with the increase of M (R32). When M (R32) increases from 0.3 to 0.6, the compression ratio decreases from 3.0 to 2.9.