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

  • 제16권10호
  • /
  • Pages.990-998
  • /
  • 2004
  • /
  • 1229-6422(pISSN)
  • /
  • 2465-7611(eISSN)
대한설비공학회 (The Society of Air-Conditioning and Refrigerating Engineers of Korea)
권호 표지

암모니아-물 흡수식 냉각기의 동적 해석

Dynamic Analysis of an Ammonia-Water Absorption Chiller

  • 김병주 (홍익대학교 기계/시스템디자인공학과)
  • Kim Byong Joo (Department of Mechanical and System Design Engineering, Hongik University)
  • 발행 : 2004.10.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

Dynamic behavior of an ammonia-water absorption system was investigated numerically. Thermal-hydraulic model for a single-effect 3 RT chiller was developed by applying transient conservation equations of total mass, $NH_3$ mass, energy and momentum to each component. Transient variations of system properties and transport variables were analysed during start-up operation. Numerical analyses were performed to quantify the effects of bulk concentration and charging ratio on the system performance in terms of cooling capacity, coefficient of performance, and time constant of system. For an absorption chiller considered in the present study, optimum charging ratio and bulk concentration were to found to exist, which resulted in the maximum cooling capacity and COP. The time constant increased as the charging ratio increased, but decreased with the increase of bulk concentration.

키워드

참고문헌

  1. Engler, M., Grossman, G. and Hellmann, H. M., 1997, Comparative simulation and in-vestigation of ammonia-water absorption cy-des for heat pump applications, Int. J. Re-frigeration, Vol. 20, No.7, pp.504-516.
  2. Kaushik, S. C., Rao, S. K and Kumari, R., 1991, Dynamic simulation of an aqua-am-monia absorption cooling system with re-frigerant storage, Energy Convers. Mgmt., Vol. 32, No.3, pp.197-206.
  3. Jeong, S., Kang, B. H., Lee, C. S. and Karng, S. W., 1993, Computer simulation on dynamic behavior of a hot water driven absorption chiller, AES-Vol.1, Int. Absorption Heat Pump Conf., ASME, pp.333-338
  4. Willers, E., Groll, M., Kulick, C., Meunier, F., Mostofizadeh, C., Neveu, P. and Wierse, M., 1999, Dynamic modelling of a liquid ab-sorption system, ISHPC, Munich, Germany, pp. 181-185.
  5. Butterworth, D., 1974, A comparison of some void fraction relationships for co-current gas-liquid flow, Int. J. Multiphase Flow, Vol. 1, pp.845-850.
  6. Ziegler, B. and Trepp, C., 1984, Equation of state for ammonia-water mixtures, Int. J. Refrigeration, Vol. 7, No.2, pp.101-106
  7. Lockhart, R.W. and Martinelli, R. C., 1949, Proposed correlation of data for isothermal two-phase two-component flow in pipes, Chem. Eng. Prog., Vol. 45, pp.39-48
  8. Beattie, D. R. H., 1973, A note on the cal-culation of two-phase pressure losses, Nuc. Eng. Des., Vol. 25, pp.395-402 https://doi.org/10.1016/0029-5493(73)90034-4
  9. Dittus, F. W. and Boelter, L. M. K., 1930, Univ. of California Pub., Eng .. Vol. 2, p.443
  10. Chen, J. C., 1963, A correlation for boiling heat transfer to saturated fluids in convec-tive flow, ASME paper 63-HT-34
  11. Forster, H. K. and Zuber, N., 1955, Dynam-ics of vapor bubbles and boiling heat trans-fer, AIChE J., Vol. 1, No.4, pp. 531-535
  12. Shah, M., 1979, A general correlation for heat transfer during film condensation in-side pipes, Int. J. Heat Mass Transfer, Vol. 22, pp.547-556 https://doi.org/10.1016/0017-9310(79)90058-9
  13. Gray, D. L. and Webb, R L., 1986, Heat transfer and friction correlations for plate fin an tube heat exchangers having plain fins, Heat Transfer, Vol. 6, pp.2746-2750
  14. Yih, S. M., 1986, Modeling heat and mass transport in falling liquid films, Edited by Cheremisinoff, N. P., Handbook of Heat and Mass Transfer, Vol. 2, pp. 111-210
  15. Seban, R. A. and McLaughlin, E. F., 1963, Heat transfer in tube coils with laminar and turbulent flow, Int. J. Heat Mass Transfer, Vol. 6, pp. 387-395.
  16. Lance, G. N., 1960, Numerical methods for high speed computer, lliffe & Sons, pp. 54-57