Shortening the defrost cycle time with active enhancement within the suction-line accumulator of an air-source heat pump

American Society of Mechanical Engineers, Advanced Energy Systems Division (Publication) AES

Volumn 36, Issue , 1996, Pages 59-63

  Nutter, Darin W ^a   O'Neal, Dennis L ^b  

^a 3202 Bell Engineering Center   (United States)

^b Texas AandM University   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

COMPRESSORS; COOLING; DEFROSTING; ELECTRIC HEATING; HEAT RESISTANCE; ORIFICES; PERFORMANCE; PRESSURE; REFRIGERANTS; TEMPERATURE;

ACCUMULATOR; AIR SOURCE HEAT PUMP; DEFROST CYCLE; HEATING SEASONAL PERFORMANCE FACTOR; SHORTENING; THERMAL EXPANSION VALVE;

HEAT PUMP SYSTEMS;

EID: 0030385411     PISSN: None     EISSN: None     Source Type: Conference Proceeding    
DOI: None     Document Type: Article

References (11)

1. ANSI/ASHRAE, 1983, "Methods of testing for seasonal efficiency of unitary air-conditioners and heat pumps" ANSI/ASHRAE Standard 116-1983.
2. ANSI/ASHRAE, 1985, "Laboratory methods of testing fans for rating" ANSI/ASHRAE Standard 51-1985 (ANSI/AMCA 210-85).
3. ARI, 1984 "Standard for unitary heat pump equipment" ARI Standard 210/240-84.
4. Bergles, A. E., 1988, "Some perspectives on enhanced heat transfer - - second generation heat transfer technology," Transactions, ASME Journal of Heat Transfer, Vol. 110, pp. 1082-1096.
5. Miller, W.A., 1987, "Laboratory examination and seasonal analysis of frosting and defrosting for an air-to-air heat pump," ASHRAE Transactions, Vol. 93, Part 1, pp. 1009-1025.
6. Mulroy, W. J., 1986, "The effect of short cycling and fan delay on the efficiency of a modified residential heat pump," ASHRAE Transactions, Vol. 92, Part 2, pp. 813-826.
7. O'Neal, D. L., Peterson, K., Anand, N., and Schliesing, J., 1989. "Refrigeration system dynamics during the reverse cycle defrost." ASHRAE Transactions, Vol. 95, Part 2, pp. 689-698.
8. Peterson, K., 1988, The effects of expansion devices on the transient response characteristics of the air-source heat pump during the reverse cycle defrost, Thesis, Texas A&M University.
9. Reay, P. A., 1991, Heat transfer enhancement - a review of techniques and their possible impact on energy efficiency in the U.K. Heat Recovery Systems & CHP, Vol. 11, No. 1 pp. 1-40.
10. Thome, J. R., 1990, Enhanced boiling heat transfer, New York: Hemisphere Publishing Co.
11. Webb, R. L., 1981, "The evolution of enhanced surface geometries for nucleate boiling," Heat Transfer Engineering, Vol. 2 Nos. 3-4 pp. 46-69.