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dc.creator | Farzad, M. | |
dc.creator | O'Neal, D. L. | |
dc.date.accessioned | 2005-07-25T21:01:31Z | |
dc.date.available | 2005-07-25T21:01:31Z | |
dc.date.issued | 1989 | |
dc.identifier.other | TR-89-08-01 | |
dc.identifier.uri | https://hdl.handle.net/1969.1/2089 | |
dc.description.abstract | The effect of the improper charging on steady state and cyclic performance (capacity, EER, power consumption, SEER, and coefficient of degradation) of a residential air conditioner which utilized a thermal expansion valve was investigated. This study was the continuation of ESL/CON/88-1 performed by Mohsen Farzad and Dennis O'Neal. A fully charged condition was established as a base case. The full charge was obtained by charging the unit to the subcooling specified by the manufacturer for a specific indoor and outdoor temperatures. Once the full charge was determined, the unit was subjected to 40%, 30%, 20%, 15%, 10%, and 5% undercharging and 5%, 10%, 15%, and 20% overcharging of refrigerant by mass. The fully charged tests were compared to those for under and overcharging. The performance of the unit was evaluated as a function of charge as well as at four outdoor room temperatures (82°F, 90°F, 95°F, and 100°F). As the outdoor temperature increased, the total capacity and EER dropped. The maximum total capacity, EER, and SEER were found at 10% undercharging (12 6 oz). The capacity and efficiency (EER and SEER) of the unit were found to be less sensitive to under/overcharging than the unit with a capillary tube expansion previously studied. Other data such as refrigerant flow rate, sensible heat ratio, superheat and subcooling were also presented. | en |
dc.format.extent | 13699526 bytes | en |
dc.format.mimetype | application/pdf | |
dc.language.iso | en_US | |
dc.publisher | Energy Systems Laboratory (http://esl.tamu.edu), Texas A&M University | |
dc.publisher | Department of Mechanical Engineering, Texas A&M University | |
dc.rights | All rights reserved by the Energy Systems Laboratory of Texas A&M and the authors. | en |
dc.subject | improper charging | en |
dc.title | An Evaluation of Improper Refrigerant Charge on the Performance of a Split System Air Conditioner with a Thermal Expansion Valve | en |
dc.type | Text | en |
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Technical Reports
Technical Reports from the Energy Systems Laboratory