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Variable speed drive heat pump performance

Author

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  • Jeter, S.M.
  • Wepfer, W.J.
  • Fadel, G.M.
  • Cowden, N.E.
  • Dymek, A.A.

Abstract

Development of a simulation model for variable speed heat pumps is described and representative results are presented. The system under consideration employs a hermetic compressor driven by an integral three-phase induction motor. Compressor speed can be modulated hy varying the frequency of the current synthesized by an inverter which supplies power to the system. A modular simulation system is used wherein an executive program manages the input and output of data and coordinates the numerical simulation procedure. The executive program calls various subroutines which model the system components, evaluate thermodynamic properties, and perform numerical tasks. Simulation results demonstrate that the variable speed heat pump has an improved COP at reduced frequency, desirable for enhancing energy conservation under part load conditions, and higher heating rates at high frequency, a useful feature for reducing supplementary resistance heat. The simulation program is used to generate performance data over a range of ambient conditions. These data are then used as the basis for seasonal energy consumption calculations performed using a temperature bin format.

Suggested Citation

  • Jeter, S.M. & Wepfer, W.J. & Fadel, G.M. & Cowden, N.E. & Dymek, A.A., 1987. "Variable speed drive heat pump performance," Energy, Elsevier, vol. 12(12), pages 1289-1298.
    • Handle: RePEc:eee:energy:v:12:y:1987:i:12:p:1289-1298
    DOI: 10.1016/0360-5442(87)90037-5
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    Cited by:

    1. Muhammad Abid & Neil Hewitt & Ming-Jun Huang & Christopher Wilson & Donal Cotter, 2021. "Domestic Retrofit Assessment of the Heat Pump System Considering the Impact of Heat Supply Temperature and Operating Mode of Control—A Case Study," Sustainability, MDPI, vol. 13(19), pages 1-26, September.
    2. DeBenedictis, A. & Haley, B. & Woo, C.K. & Cutter, E., 2013. "Operational energy-efficiency improvement of municipal water pumping in California," Energy, Elsevier, vol. 53(C), pages 237-243.
    3. Singh, H. & Muetze, A. & Eames, P.C., 2010. "Factors influencing the uptake of heat pump technology by the UK domestic sector," Renewable Energy, Elsevier, vol. 35(4), pages 873-878.
    4. Muhammad Abid & Neil Hewitt & Ming-Jun Huang & Christopher Wilson & Donal Cotter, 2021. "Performance Analysis of the Developed Air Source Heat Pump System at Low-to-Medium and High Supply Temperatures for Irish Housing Stock Heat Load Applications," Sustainability, MDPI, vol. 13(21), pages 1-31, October.

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