0
Article

Effect of Refrigerant Flow Control on the Heating Performance of a Variable-Speed Heat Pump Operating at Low Outdoor Temperature

[+] Author and Article Information
Bong H. Kim

Automotive, Industrial, and Mechanical Engineering Department, Daegu University, Korea

Dennis L. O’Neal

Mechanical Engineering Department, Texas A&M University, College Station, TX 77843

J. Sol. Energy Eng 127(2), 277-286 (Apr 25, 2005) (10 pages) doi:10.1115/1.1849224 History: Received April 07, 2004; Revised July 19, 2004; Online April 25, 2005
Copyright © 2005 by ASME
Your Session has timed out. Please sign back in to continue.

References

Stoecker,  W. F., Smith,  D. L., and Emde,  B. N., 1981, “Influence of Expansion Device on the Seasonal Energy Requirements of a Residential Air Conditioner,” ASHRAE Trans., 87, pp. 349–360.
Krakow,  K. I., Lin,  S., and Matsuki,  K., 1987, “A Study of Primary Effects of Various Means of Refrigerant Flow Control and Capacity Control on the Seasonal Performance of a Heat Pump,” ASHRAE Trans., 93, pp. 511–524.
Stoecker, W. F., and Jones, J. W., 1982, Refrigerant and Air Conditioning, McGraw–Hill, New York.
Rice, C. K., and Fisher, S. K., 1985, “A Comparative Analysis of Single and Continuously Variable-Capacity Heat Pump Concepts,” CONF-841231.
Kuehl,  S. J., and Goldschmidt,  V. W., 1991, “Modeling of Steady Flow of R-22 Through Capillary Tubes: Test Data,” ASHRAE Trans., 97, pp. 139–148.
Farzad,  M., and O’Neal,  D. L., 1993, “Influence of the Expansion Device on Air-Conditioner System Performance Characteristics Under a Range of Charging Conditions,” ASHRAE Trans., 99, pp. 3–13.
Choi,  J. M., Kim,  Y. C., Kim,  J. Y., and Bae,  Y. D., 1997, “An Experimental Study on the Performance of an Inverter Heat Pump With Variation of Fre-quency and Capillary Size,” Korean J. Air Conditioning and Refrigeration Engineering,9, pp. 64–72.
Park,  Y. C., Ha,  D. Y., and Min,  M. K., 1998, “The Effect of Seasonal Performance of an Inverter Compressor With Higher and Lower Operating Ranges,” Korean J. of Air-Conditioning and Refrigeration Eng.,10, pp. 173–179.
ASHRAE, 1983, Methods of testing for seasonal efficiency of unitary air-conditioners and heat pumps. ASHRAE Standard ANSI/ASHRAE 116–1983.
Japanese Industrial Standard. Testing methods for unitary air conditioners, JIS B 8615-1884.
ARI, 1989, Unitary air conditioning and air-source heat pump equipment, ARI Standard 210/240.
ASHRAE, 1981, ASHRAE Handbook of Fundamentals, ASHRAE, New York.
Robinson, J. H., 1996, “The Impact of Charge on Performance of an Air-to-Air Heat Pump for R22 and Three Binary Blends of Refrigerants 32 and 134a,” Master thesis, Texas A&M University.
McQuiston, F. C., and Parker, J. D., 1988, Heating, Ventilating, and Air Conditioning: Analysis and Design, Wiley, New York.
Incropera, F. P., and DeWitt, D. P., 2002, Fundamentals of Heat and Mass Transfer, John Wiley & Sons, New York.

Figures

Grahic Jump Location
A schematic diagram of the test set-up
Grahic Jump Location
Cross-sectional view of the electronic valve
Grahic Jump Location
Determination of the optimum charge: Variations of both cooling and heating capacity as a function of refrigerant charge for the rated compressor speeds (47 and 65 Hz)
Grahic Jump Location
Pressure-enthalpy diagrams for EEV with different opening angles (outdoor temperature=0°C, compressor speed=65 Hz)
Grahic Jump Location
Heating capacity and EER versus compressor speed for the given outdoor temperature (0°C)
Grahic Jump Location
Variation of refrigerant flow rate as a function of compressor speed for the given outdoor temperature (0°C)
Grahic Jump Location
Pressure–enthalpy diagrams for different expansion devices with the compressor speed=65 Hz (indoor: 21/15.5°C, outdoor: 0°C with 50% relative humidity)
Grahic Jump Location
Pressure–enthalpy diagrams for different outdoor temperatures when using the capillary tube (1400 mm): compressor speed=75 Hz
Grahic Jump Location
Variation of refrigerant flow rate as a function of outdoor temperature for different compressor speeds when using the capillary tube
Grahic Jump Location
Variation of the degree of superheat as a function of outdoor temperature for the given compressor speed (75 Hz)
Grahic Jump Location
Variation of heating capacity as a function of outdoor temperature for different compressor speeds
Grahic Jump Location
Variation of EER as a function of outdoor temperature for different compressor speeds

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In