Browse > Article
http://dx.doi.org/10.3795/KSME-B.2012.36.8.797

Potential Performance Enhancement of Dual Heat Pump Systems through Series Operation  

Baik, Young-Jin (High Efficiency and Clean Energy Research Division, Korea Institute of Energy Research)
Kim, Min-Sung (High Efficiency and Clean Energy Research Division, Korea Institute of Energy Research)
Chang, Ki-Chang (High Efficiency and Clean Energy Research Division, Korea Institute of Energy Research)
Lee, Young-Soo (High Efficiency and Clean Energy Research Division, Korea Institute of Energy Research)
Kim, Hyeon-Ju (Deep Ocean Water Application Research Center, Korea Ocean Research & Development Institute)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.36, no.8, 2012 , pp. 797-802 More about this Journal
Abstract
In this study, the potential performance enhancement in a dual heat pump system through series operation was investigated by a comparison between the performance for parallel and series operation for a heating supply temperature of $60^{\circ}C$. To compare the performance of each configuration fairly, the heat transfer surface area of the heat exchangers was fixed. The inlet temperatures and the flow rates of the heat source and the load were also fixed. In addition, the heat transfer and pressure drop characteristics of the working fluids were considered to achieve a more realistic comparison. The results show that the heating coefficient of performance (COP) of the series configuration is approximately 5% higher than that of the parallel configuration under the simulation conditions considered in the present study.
Keywords
Heat Pump; Series Operation; Parallel Operation;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Gungor, K. E. and Winterton, R. H. S., 1987, "Simplified General Correlation for Saturated Flow Boiling and Comparisons of Correlations with Data," Chem. Eng. Res. Des., Vol. 65, pp. 148-156.
2 Gnielinski, V., 1976, "New Equations for Heat and Mass Transfer in Turbulent Pipe and Channel Flow," Int. Chem. Eng., Vol. 16, pp. 359-368.
3 Shah, M. M., 1979, "A General Correlation for Heat Transfer During Film Condensation Inside Pipe," Int. J. of Heat Mass Transfer, Vol. 22, pp. 547-556.   DOI   ScienceOn
4 Muller-Steinhagen, H. and Heck, K., 1986, "A Simple Pressure Drop Correlation for Two-Phase Flow in Pipes," Chem. Eng. Process, Vol. 20, 297-308.   DOI   ScienceOn
5 Collier, J. G. and Thome, J. R., 1994, "Convective Boiling and Condensation," 3rd ed., Clarendon Press, Oxford.
6 Lemmon, E. W., Huber, M. L. and McLinden, M. O., 2007, NIST Standard Reference Database 23: Reference Fluid Thermodynamic and Transport Properties-REFPROP, Version 8.0, National Institute of Standards and Technology, Standard Reference Data Program, Gaithersburg.
7 O'Neill, P. A., 1993, "Industrial Compressors: Theory and Equipment," Butterworth-Heinemann, Oxford, p. 569.