Browse > Article
http://dx.doi.org/10.3795/KSME-B.2010.34.2.191

Numerical Simulation of a Two-Stage Hybrid Heat Pump  

Jeong, Si-Young (Dept. of Mechanical Engineering, Sogang Univ.)
Yun, Han-Gu (Dept. of Mechanical Engineering, Sogang Univ.)
Park, Ki-Woong (Dept. of Mechanical Engineering, Sogang Univ.)
Park, Seong-Ryong (Korea Institute of Energy Research)
Kim, Min-Sung (Korea Institute of Energy Research)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.34, no.2, 2010 , pp. 191-196 More about this Journal
Abstract
Hybrid heat pumps, which combine the vapor compression and absorption heat pump cycle, can efficiently produce hot water of $80^{\circ}-90^{\circ}C$ from the low temperature of ${\sim}50^{\circ}C$. In this study, the performance of a two-stage hybrid heat pump (HHP) was compared with a single-stage hybrid heat pump using EES (Engineering Equation Solver). For the same operating conditions, the two-stage HHP showed a slightly higher COP (Coefficient Of Performance) and more stable operating conditions than the single-stage HHP. Moreover, the maximum working fluid temperature of the two-stage HHP was found to be lower than that of the single-stage HHP by about 40 K, which makes the working conditions of the lubricating oil safer. The COPs of both systems decreased with increasing UA-values. However, the heat output of the HHP was increased at the same time.
Keywords
Hybrid Heat Pump; Single-Stage; Two-Stage; Cycle Simulation;
Citations & Related Records

Times Cited By SCOPUS : 0
연도 인용수 순위
  • Reference
1 Seong-Ryong Park, 2008, "Development of Hybrid Heat Pump by Using Waste Heat," KIER, p. 30.
2 Jeong, S., Chae, K. H., Park, S. W., Park, S. and Kim, M. S., 2008, "Cycle Analysis of an Absorption/Compression Hybrid Heat Pump System," ISHPC conference, Seoul, p. 2.
3 Jeong, S., Yun, H. G., Park, K., Park, S. and Kim, M. S., 2009, "Performance Analysis of a Vapor Compression Heat Pump and a Hybrid Heat Pump using Ammonia/Water," The 3rd Korean Congress of Refrigeration, pp. 144-147.
4 EES32, F-Chart Software.
5 Kwan-Tack Jeon and Dong-Soo Jung, 2000, "Opimization Study of the Hybrid Cycle," Journal of SAREK 2000 Summer Annual Conference(III), p. 1091.
6 Groll, E. A. and Radermacher, R., 1993, "Vapor Compression Heat Pump With Solution Circuit And Desorber/Absorber Heat Exchange," International Absorption Heat Pump Conference31, pp. 463-469.