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TECHNICAL PAPERS

Return Air Leakage Impact on Air Conditioner Performance in Humid Climates

[+] Author and Article Information
Dennis L. O’Neal

Dept. of Mechanical Engineering, Texas A & M University, College Station, TXe-mail: doneal@mengr.tamu.edu

Angel Rodriguez

Enron Energy Services, Norcross, GA

Michael Davis

Oarsman Corp., Bryan, TX

Sekhar Kondepudi

Brecis Communications, San Jose, CA

J. Sol. Energy Eng 124(1), 63-69 (May 01, 2001) (7 pages) doi:10.1115/1.1435648 History: Received June 01, 2000; Revised May 01, 2001
Copyright © 2002 by ASME
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References

Modera,  M. P., 1989, “Residential Duct System Leakage: Magnitude, Impacts and Potential for Reduction,” ASHRAE Trans. 95, Pt. 2, pp. 561–569.
Lambert,  L. A., and Robison,  D. H., 1989, “Effects of Ducted Forced Air Heating Systems on Residential Air Leakage and Heating Energy Use,” ASHRAE Trans. 95, Pt. 2, pp. 534–541.
Robison,  D. H., and Lambert,  L. A., 1989, “Field Investigation of Residential Infiltration and Heating Duct Leakage,” ASHRAE Trans. 95, Pt. 2, pp. 542–550.
Cummings,  J. P., and Tooley,  J. J., 1989, “Infiltration and Pressure Differences Induced by Forced Air Systems in Florida Residences,” ASHRAE Trans. 95 Pt. 2, pp. 551–560.
Medina, M., 1992, “Development of a Transient Heat and Mass Transfer Model of Residential Attics to Predict Energy Savings Produced by the Use of Radiant Barriers,” Ph.D. dissertation, Texas A&M University.
ASHRAE, 1997, Handbook of Fundamentals, Chap. 26, Am. Society of Heating, Refrigerating, and Air Conditioning Engineers, Atlanta, GA.
AMCA, 1985, Laboratory Methods of Testing Fans for Rating, Standard 210, Air Movement and Control Association, Inc., Arlington Heights, IL.
ARI, 1989, Standard 210/240. Standard for Unitary Air-Conditioning and Air-Source Heat Pump Equipment, Air-Conditioning and Refrigeration Institute, Arlington, VA.

Figures

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Layout of the psychometric rooms showing the placement of the indoor and outdoor units and air-side instrumentation
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Instrumentation on the refrigerant side of the system
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Evaporator with return air leakage from hot attic space
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Baseline and modified tests used to simulate the effects of return air leakage
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Effective capacity at 54.4°C attic temperature and 37.8°C outdoor temperature for various attic humidities and leakage conditions
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Effective capacity at 65.6°C attic temperature and 37.8°C outdoor temperature for various attic humidities and leakage conditions
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Effective capacity at different attic temperature and a range of high attic humidity conditions
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Power consumption at 54.4°C attic temperature and 37.8°C outdoor temperature for various attic humidities and leakage conditions
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Effective COP at 54.4°C attic temperature and 37.8°C outdoor temperature for various humidities and leakage conditions
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Effective coefficient of performance at different attic temperature and a range of high attic humidity conditions
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Effective SHR at two attic conditions and 37.8°C outdoor temperature for various attic humidities and leakage conditions
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Effective SHR at 10% leakage and 37.8°C outdoor temperature for various attic temperatures and relative humidities

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