Study on the operating performance of cross hot-gas bypass defrosting system for air-to-water screw heat pumps

Applied Thermal Engineering

Volumn 59, Issue 1-2, 2013, Pages 398-404

  Wang, Zhiyi ^a,b,c   Yang, Hongxing ^b   Chen, Song ^c  

^a ZHEJIANG SCI TECH UNIVERSITY   (China)

^b HONG KONG POLYTECHNIC UNIVERSITY   (Hong Kong)

^c Zhejiang Dun'an Artificial Environmental Equipment Co Ltd   (China)

Author keywords

Air to water screw heat pump; COP; Cross hot gas bypass defrosting; Pressure; Temperature

Indexed keywords

COP; DEFROSTING SYSTEMS; DISCHARGE TEMPERATURE; DYNAMIC CHARACTERISTICS; HEAT PUMPS; HOT-GAS BYPASS; OPERATING PERFORMANCE; OUTLET-WATER TEMPERATURES;

HEAT PUMP SYSTEMS; PRESSURE; SCREWS; TEMPERATURE;

DEFROSTING;

EID: 84879813429     PISSN: 13594311     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.applthermaleng.2013.06.007     Document Type: Article

References (12)

1. D. Huang, Q.X. Li, and X.L. Yuan Comparison between hot-gas bypass defrosting and reverse-cycle defrosting methods on an air-to-water heat pump Appl. Energy 86 2009 1697 1703
2. J.K. Dong, S.M. Deng, and Y.Q. Jiang An experimental study on defrosting heat supplies and energy consumptions during a reverse cycle defrost operation for an air source heat pump Appl. Therm. Eng. 37 2012 380 387
3. Y. Yasuda, T. Senshu, S. Kuroda, T. Atsumi, and K. Oguni Heat pump performance under frosting conditions: part II - simulation of heat pump cycle characteristics under frosting conditions ASHRAE Trans. 96 1990 330 336
4. S.N. Kondepudi, and D.L. O'Neal Frosting performance of tube fin heat exchanger with wavy and corrugated fins Exp. Therm. Fluid Sci. 4 1991 613 618
5. J.S. Byun, J. Lee, and C.D. Jeon Frost retardation of an air-source heat pump by the hot gas bypass method Int. J. Refrig. 31 2008 328 334 (Pubitemid 351282402)
6. Y.J. Ding, G.Y. Ma, and J. Yi Experiment investigation of reverse cycle defrosting methods on air source heat pump with TXV as the throttle regulator Int. J. Refrig. 27 2004 671 678
7. D. Huang, and X.L. Yuan Effect of fan-starting methods on the reverse-cycle defrost performance of an air-source heat pump Int. J. Refrig. 27 2004 107 112
8. D. Huang, Z.L. He, and X.L. Yuan Dynamic characteristics of an air-to-water heat pump under frosting/defrosting conditions Appl. Therm. Eng. 27 2007 1996 2002 (Pubitemid 46603301)
9. Y. Yao, Y.Q. Jiang, S.M. Deng, and Z.L. Ma A study on the performance of the airside heat exchanger under frosting in an air source heat pump water heater/chiller unit Int. J. Heat Mass Transf. 47 2004 3745 3756 (Pubitemid 38790924)
10. D.Y. Lee, Y. Ahn, Y. Kim, Y. Kim, Y.S. Chang, and L. Nam Experimental investigation on the drop-in performance of R407C as a substitute for R22 in a screw chiller with shell-and-tube heat exchangers Int. J. Refrig. 25 2002 575 585 (Pubitemid 34771868)
11. R.J. Moffat Describing the uncertainties in experimental results Exp. Therm. Fluid Sci. 1 1988 3 17
12. Hwan-Jong Choi, and Byung-Soon Kim Defrosting method adopting dual hot gas bypass for an air-to-air heat pump Appl. Energy 88 2011 4544 4555