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

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

Simulation of the Refrigeration Cycle Equipped with a Non-Adiabatic Capillary Tube

비단열 모세관의 영향을 고려한 냉동 사이클 시뮬레이션

  • Park, Sang-Goo (School of Mechanical Engineering, Pusan National University) ;
  • Son, Ki-Dong (School of Mechanical Engineering, Pusan National University) ;
  • Jeong, Ji-Hwan (School of Mechanical Engineering, Pusan National University) ;
  • Kim, Lyun-Su (LG Electronics)
  • Published : 2009.03.10
Download PDF
⟨ Previous Next ⟩

Abstract

The simulation of refrigeration cycle is important since the experimental approach is costly and time-consuming. The present paper focuses on the simulation of a refrigeration cycle equipped with a capillary tube-suction line heat exchanger(SLHX), which is widely used in small vapor compression refrigeration systems. The present simulation is based on fundamental conservation equations of mass, momentum, and energy. These equations are solved through an iterative process. The non-adiabatic capillary tube model is based on homogeneous two-phase flow model. This model is used to understand the refrigerant flow behavior inside the non-adiabatic capillary tube. The simulation results show that both of the location and length of heat exchange section influence the coefficient of performance (COP).

Keywords

References

  1. Domanski, P. A., 1995, Theoretical evaluation of the vapor compression cycle with a liquid-line/suction-line heat exchanger, economizer, and ejector, NIST Report, NISTIR5606
  2. Fischer, S. K. and Rice, C. K., 1980, The Ork Ridge heat pump models : 1 A steady-state computer design model for air to air heat pumps, ORNL/CON-80/R1, Energy Division, Oak Ridge National Lab., pp. 47-67
  3. Domanski, P. A., 1982, Computer modeling and prediction of performance of an air source heat pump with a capillary tube, Ph.D. Dissertation, The Catholic Univ. of America., pp. 62-93
  4. Yoon. B., 1999, Air-conditioner cycle simulation using tube-by-tube method. Korean Journal of Air-Conditioning and Refrigeration Engineering, Vol. 11, No. 4, pp. 499-510
  5. Dabiri, A. E. and Rice, C. K., 1981, A compressor simulation method with corrections for the level of suction gas superheat, ASHRAE Trans., Vol. 87, No. 1. pp. 771-782
  6. Hilpert, R., 1933, Forsch. Geb. Ingenieurwes., Vol. 4, p. 215 https://doi.org/10.1007/BF02719754
  7. Kakac, S. and Liu, H., 2002, Heat exchangers : selection, rating, and thermal design, CRC Press, p. 96
  8. Gneilinski, V., 1976, New equation for heat and mass transfer in turbulent pipe and channel flow, International Journal of Chemical Engineering, Vol. 16, pp. 359-368
  9. Cavallini, A. and Zecchin, R., 1974, A dimensionless correlation for heat transfer in forced convection condensation, Proc. 5th Heat Transfer Conf., Tokyo, Japan, September, Vol. 3-7, pp. 309-313
  10. Sadik, K. et al., 1998, Heat exchangers selection, rating, and thermal design, CRC Press, p. 119
  11. Churchill, S. W., 1977, Friction equation spans all fluid flow regimes, Chemical Engineering, Vol. 84, pp. 91-92
  12. Lin, S. et al., 1991, Local frictional pressure drop during vaporization of R-12 through capillary tubes, International Journal of Multiphase Flow, Vol. 17, No. 1, pp. 95-102 https://doi.org/10.1016/0301-9322(91)90072-B
  13. Chen, J. C., 1966, A correlation for boiling heat transfer to saturated fluids in convective flow, Ind. Eng. Chem. Process Des. Dev., Vol. 5, pp. 322-329 https://doi.org/10.1021/i260019a023
  14. Forster, H. K. and Zuber, N., 1955, Dynamics of vapor bubbles and boiling heat transfer, AIChE Journal, Vol. 1, No. 4, pp. 531-535 https://doi.org/10.1002/aic.690010425
  15. Mezavila, M. M. and Melo, C., 1996, CAPHEAT : a homogeneous model to simulate refrigerant flow through non-adiabatic capillary tubes, International Refrigeration Conference at Purdue, pp. 95-100