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.
Dittus, F. W. and Boelter, L. M. K., 1930, Univ. of California Pub., Eng .. Vol. 2, p.443
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.
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
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.
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.
Beattie, D. R. H., 1973, A note on the cal-culation of two-phase pressure losses, Nuc. Eng. Des., Vol. 25, pp.395-402
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
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.
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
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.
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
Ziegler, B. and Trepp, C., 1984, Equation of state for ammonia-water mixtures, Int. J. Refrigeration, Vol. 7, No.2, pp.101-106
Lance, G. N., 1960, Numerical methods for high speed computer, lliffe & Sons, pp. 54-57
Chen, J. C., 1963, A correlation for boiling heat transfer to saturated fluids in convec-tive flow, ASME paper 63-HT-34
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
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
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Choi, Yong-Don ; Kang, Yong-Tae ; Kim, Nae-Hyun ; Kim, Man-Hoe ; Park, Kyoung-Kuhn ; Park, Byung-Yoon ; Park, Jin-Chul ; Hong, Hi-Ki 2007. "Recent Progress in Air Conditioning and Refrigeration Research - A Review of Papers Published in the Korean Journal of Air-Conditioning and Refrigeration Engineering in 2004 and 2005 -" 설비공학논문집 = Korean journal of air-conditioning and refrigeration engineering, 19(1): 94~131