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An Evaluation of the Effects of Refrigerant Charge on a Residential Central Air Conditioner with Orifice Expansion
Abstract
Recent studies have been conducted at Texas A & M
University to quantify the effect of over/undercharging on
the performance of a residential central air conditioner
with two different expansion devices: capillary tubes and
thermal expansion valves. A third expansion device, the
short-tube orifice, is used by many manufacturers of
residential air conditioners. This report summarizes the
results of experiments performed for the Trane Dealer
Products Group on a Trane central air conditioner which
utilized short-tube orifices for flow control. The project
was conducted under Trane Purchase Order No. TYR1020264-
T280D.
Description
The report is divided into 5 chapters in addition to the this chapter. Chapter 2 describes the experimental facilities and procedures used to collect and analyze data. Results are presented in Chapters 3 through 5. In all three orifices were tested. In chapter 3, data for the nominal size orifice are presented first. Data on the other two orifices are presented in Chapter 4. Comparisons between the three orifices are presented in Chapter 5. Conclusions are provided in Chapter 6.Subject
overchargingundercharging
residential central air conditioner
capillary tube
thermal expansion device
short-tube orifice
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Citation
O'Neal, D. L.; Ramsey, C. J.; Farzad, M. (1989). An Evaluation of the Effects of Refrigerant Charge on a Residential Central Air Conditioner with Orifice Expansion. Energy Systems Laboratory (http://esl.tamu.edu), Texas A&M University; Department of Mechanical Engineering, Texas A&M University. Available electronically from https : / /hdl .handle .net /1969 .1 /2086.