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Air Flow Distribution through an A-Shaped Evaporator under Dry and Wet Coil Conditions

Published

Author(s)

David A. Yashar, Piotr A. Domanski

Abstract

This paper presents a study of the air flow distribution through a residential air-conditioning heat exchanger. The test subject was a finned-tube, A-shaped coil outfitted with a condensation collection pan required for horizontal installation. We examined the air flow distribution approaching and exiting the coil at the rated and a reduced air flow rate, and at two humidity levels. Our measurements showed that the presence of the condensation collection hardware greatly impedes air flow through the lower slab of the coil, and uncovered portions of the coil where the airflow is blocked by the mounting hardware. The wet coil tests showed that the presence of water on the coil causes a large increase in air flow resistance which has an effect on the flow distribution. The distribution of water concentration was non-uniform and time dependent. We also developed a computational model of the flow through the test coil, based on a momentum resistance modeling approach.
Proceedings Title
13th International Refrigeration and Air Conditioning Conference at Purdue
Conference Dates
July 12-15, 2010
Conference Location
West Lafayette, IN

Keywords

air distribution, finned tube heat exchanger

Citation

Yashar, D. and Domanski, P. (2010), Air Flow Distribution through an A-Shaped Evaporator under Dry and Wet Coil Conditions, 13th International Refrigeration and Air Conditioning Conference at Purdue, West Lafayette, IN, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=905426 (Accessed July 15, 2024)

Issues

If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.

Created July 11, 2010, Updated February 19, 2017