IMPROVEMENT OF THE HEATING PERFORMANCE IN A VARIABLE SPEED HEAT PUMP BY APPLYING THE GAS INJECTION TECHNIQUE INTO A TWIN ROTARY TYPE COMPRESSOR
For heat pumps used in the cold regions, it is very important to obtain appropriate heating capacity. Several studies have been performed to enhance heating capacity at low ambient temperatures. The heating performance was significantly improved by the application of a variable speed compressor. However, for outdoor temperature conditions below -15℃, it is still difficult to acquire enough heating capacity above the rated heating capacity. In this study, a twin rotary type compressor with gas injection was applied to a heat pump system in order to improve the heating capacity at low ambient temperatures. The heating performance of the gas injection cycle was measured and analyzed by varying outdoor temperature and compressor frequency. The tested heating performance of the gas injection cycle was compared with that of the non-injection cycle. The heating capacity of the gas injection system was increased by 11～23％ with the variation of outdoor temperature. The COP based on equal capacity was also improved by 28～35％.
JAEHYEOK HEO YONGTAEK LEE SUNIL LEE YONGCHAN KIM
Graduate school of Mechanical Engineering, Korea University Anam-Dong, Sungbuk-Ku, Seoul, 136-713, K Department of Mechanical Engineering, Korea University Anam-Dong, Sungbuk-Ku, Seoul, 136-713, Korea
国际会议
The 22nd International Congress of Refrigeration(第22届国际制冷大会)
北京
英文
2007-08-21（万方平台首次上网日期，不代表论文的发表时间）