The impact of refrigerant charge, airflow, and expansion devices on the measured performance of an air-source heat pump - Part I

Bo Shen, James E. Braun, Eckhard A. Groll

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

10 Scopus citations

Abstract

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.

Original languageEnglish
Title of host publicationASHRAE Transactions - Papers Presented at the 2011 Annual Conference in Montreal, Quebec, Canada of the American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc.
Pages533-551
Number of pages19
EditionPART 2
StatePublished - 2011
Event2011 ASHRAE Annual Conference - Montreal, QC, Canada
Duration: Jun 25 2011Jun 29 2011

Publication series

NameASHRAE Transactions
NumberPART 2
Volume117
ISSN (Print)0001-2505

Conference

Conference2011 ASHRAE Annual Conference
Country/TerritoryCanada
CityMontreal, QC
Period06/25/1106/29/11

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