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

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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암모니아/물 흡수식 냉동기의 대향류 판형 재생기의 수치모델

  • 지제환 (홍익대학교 기계·시스템디자인공학과) ;
  • 정은수 (홍익대학교 기계·시스템디자인공학과) ;
  • 정시영 (서강대학교 기계공학과)
  • Published : 2001.10.01
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Abstract

A numerical model which simulates the flow boiling process of the ammonia/water solution within a plate type generator for ammonia/water absorption refrigerators was developed. The ammonia/water solution flows downward under gravity and the ammonia/water vapor generated by flow boiling flows upward. The heating medium flows counter to the ammonia/water solution. The flow pattern within the generator was assumed to be a bubbly flow, and the liquid and vapor phases were assumed to be saturated. It was shown that the boiling of ammonia occurred mainly in the upper part of the generator. The effects of the heating medium inlet temperature, the mass flow rate of the heating medium and the mass flow rate of ammonia/water solution into the generator on the generation of ammonia/water vapor were investigated.

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References

  1. Air-Conditioning and Refrigeration Engineering v.27 no.1 Ammonia-water absorption technologies in USA and Japan(1) Kang, Y.T.
  2. Korean Journal of Air-Conditioning and Refrigeration Engineering v.13 no.4 Void fraction and pressure gradient of countercurrent two-phase flow in narrow rectangular channels Kim, B.J.;Jeong, E.S.;Sohn, B.H.
  3. Proceedings of the SAREK '98 Summer Annual Conference(Ⅲ) An analysis of the heat transfer characteristics of a regenerator of absorption heat pump with a capacity of 150 RT Park, C.W.;Jurng, J.;Chin, S.M.;Chung, B.C.;Ryu, B.S.
  4. Proceedings of the 3rd KSME-JSME Thermal Engineering Conference v.2 Experiments on a regenerator with thermosyphon for absorption heat pumps Park, C.W.;Nam, P.W.
  5. International Absorption Heat Pump Conference v.31 Boiling heat transfer in high temperature generation of absorption chiller/heater Furukawa, M.;Enomoto, E.;Segokuchi, K.
  6. ASHRAE Trans. v.103 GAX component simulation and validation Shailesh, V.P.;Gomezplata, A.;Papar, R.A.;Anand, G.;Erickson, D.C.
  7. Int. J. Multiphase Flow v.9 no.6 Counter current gas-liquid vertical flow model for flow pattern and pressure drop Taitel, Y.;Barnea, D.
  8. Trans. ASME J. Heat Transfer v.87 Average volumetric concentration in two-phase flow systems Zuber, N.;Findlay, J.
  9. AIChE J. v.6 Velocity of large drops and bubbles in media of infinite or restricted extent Harmathy, T.Z.
  10. Int. J. Heat Mass Transfer v.32 no.9 A study of flow boiling heat transfer with refrigerant mixture Jung, D. S.;McLinden, M.;Radermacher, R.;Didion, D.
  11. Int. J. Heat Mass Transfer v.27 no.9 Reflux condensation in a two-phase closed thermosypon Chen, S.J.;Reed, J.G.;Tien, C.L.
  12. International Journal of Refrigeration v.7 no.2 Equation of state for ammonia-water mixtures Ziegler, B.;Trepp, Ch.
  13. Absorption Chillers and Heat Pumps Herold, K.E.;Rademacher, R.;Klein, S.A.
  14. Korean Journal of Air-Conditioning and Refrigeration Engineering v.13 no.6 A numerical analysis of a revised VX absorption cooling cycle Chang, W.Y.;Jeong, E.S.;Kim, B.J.
  15. Convective Boiling and Condensation (3rd ed.) Collier, J.G.;Thome, J.R.