TY - GEN
T1 - The impact of refrigerant charge, airflow, and expansion devices on the measured performance of an air-source heat pump - Part I
AU - Shen, Bo
AU - Braun, James E.
AU - Groll, Eckhard A.
PY - 2011
Y1 - 2011
N2 - This paper describes extensive tests performed on a 3-ton R-22 split heat pump in heating mode. The tests contain 150 steady-state performance tests, 18 cyclic tests, and 18 defrost tests. During the testing work, the refrigerant charge level was varied from 70% to 130%, relative to the nominal value; the outdoor temperature was altered by three levels at 17°F (-8.3°C), 35°F (1.7°C) and 47°F (8.3°C); indoor airflow rates ranged from 60% to 150% of the rated airflow rate; and the expansion device was switched from a fixed-orifice to a thermal expansion value. Detailed performance data from the extensive steady-state cyclic and defrost testing performed were presented and compared.
AB - This paper describes extensive tests performed on a 3-ton R-22 split heat pump in heating mode. The tests contain 150 steady-state performance tests, 18 cyclic tests, and 18 defrost tests. During the testing work, the refrigerant charge level was varied from 70% to 130%, relative to the nominal value; the outdoor temperature was altered by three levels at 17°F (-8.3°C), 35°F (1.7°C) and 47°F (8.3°C); indoor airflow rates ranged from 60% to 150% of the rated airflow rate; and the expansion device was switched from a fixed-orifice to a thermal expansion value. Detailed performance data from the extensive steady-state cyclic and defrost testing performed were presented and compared.
UR - http://www.scopus.com/inward/record.url?scp=84856628322&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84856628322
SN - 9781936504121
T3 - ASHRAE Transactions
SP - 533
EP - 551
BT - ASHRAE Transactions - Papers Presented at the 2011 Annual Conference in Montreal, Quebec, Canada of the American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc.
T2 - 2011 ASHRAE Annual Conference
Y2 - 25 June 2011 through 29 June 2011
ER -