Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
권호 표지

An Experimental Study on the Optimal Intermediate Pressure of a 2-Stage Compression Heat Pump Using River Water

하천수 열원 2단압축 열펌프의 최적 중간압에 관한 실험적 연구

  • Published : 2009.06.10
Download PDF
⟨ Previous Next ⟩

Abstract

The objective of this study is to predict optimal intermediate pressure of a 2-stage compression heat pump system using river water. To determine the maximum performance of the 2-stage compression heat pump system, the experimental evaluations on the 2-stage compression cycle were carried out under various operating conditions. Electronic expansion valves were applied to control intermediate pressure and superheat. Based on the experimental data, an empirical correlation for predicting optimal intermediate pressure which considering cycle operating parameters was developed. The present correlation was verified by comparing the predicted data with the measured data. The predictions showed a good agreement with the measured data within a relative deviation of ${\pm}4%$ at various operating conditions.

Keywords

References

  1. Czaplinski, S., 1959, Uber den optimalen Zwischendruck bei Kälteprozessen, Algemeine Wärmetechnik, Vol. 91, pp. 3-6
  2. Stoecker, W. F. and Jones, J. W., Refrigeration and Air Conditioning, McGraw Hill
  3. Zubair, S. M., Yaqub, M. and Khan, S. H., 1996, Second-law-based thermodynamic analysis of two-stage ad mechanical subcooling refrigeration cycles, International Journal of Refrigeration, Vol. 19, No. 8, pp. 506- 516 https://doi.org/10.1016/S0140-7007(96)00045-X
  4. Domanski, P. A., 1995, Theoretical evaluation of the vapor compression cycle with a liquid- line/suction-line heat exchanger, economizer, and ejector, NIST Interagency Report 5606, NIST, Gaitersburg, MD
  5. Rasi, A., 1955, La pression intermédiare la plus correcte pour les cycles frigorifiques a deux phases, IX International Congress of Refrigeration Paris 1, pp. 3032-3039
  6. De Lepeleire, G., 1973, Une nouvelle facond'appreciation et de selection des compresserus frigorifiques bietages. In : XIII International Congress of Refrigeration Washington, pp. 39-48
  7. Ratts, E. B. and Brown, J. S., 2000, A generalized analysis for cascading single fluid vapor compression refrigeration cycles using an entropy generation minimization method, International Journal of Refrigeration, Vol. 23, No. 5, pp. 353-365 https://doi.org/10.1016/S0140-7007(99)00070-5