Effect of reduced evaporator airflow on the high temperature performance of air conditioners

Two residential sized air conditioners were tested in psychrometric rooms at reduced evaporator airflows ranging from 0 to 50% below that recommended by the manufacture of each of the units. Outdoor temperatures ranged from 35 to 49°C. One of the units used a thermal expansion valve for flow control...

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Bibliographic Details
Published inEnergy and buildings Vol. 24; no. 3; pp. 195 - 201
Main Authors Rodriguez, Angel G., O'Neal, Dennis, Davis, Michael, Kondepudi, Sekhar
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.10.1996
Subjects
Air conditioners
Evaporator airflow
High temperature performance
Air conditioners
High temperature performance
Evaporator airflow
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Summary:Two residential sized air conditioners were tested in psychrometric rooms at reduced evaporator airflows ranging from 0 to 50% below that recommended by the manufacture of each of the units. Outdoor temperatures ranged from 35 to 49°C. One of the units used a thermal expansion valve for flow control while the other unit used a short tube orifice. Performance of the units was quantified by the capacity, power, coefficient of performance, and sensible heat ratio. Results at 35°C indicated that the reduction in air produced a larger drop in capacity and coefficient of performance for the orifice controlled unit than the thermal expansion valve controlled unit. The power showed less than a 4% reduction for either unit as the airflow was reduced by 50%.
ISSN:0378-7788
DOI:10.1016/S0378-7788(96)00976-0