Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Experimental Study on Optimization of Absorber Configuration in Compression/Absorption Heat Pump with NH3/H2O Mixture

NH3/H2O 혼합냉매를 사용한 압축/흡수식 히트펌프 시스템의 흡수기 최적화에 관한 실험적 연구

  • Kim, Ji-Young (Solar Thermal and Geothermal Research Center, Korea Institute of Energy Research) ;
  • Kim, Min-Sung (Solar Thermal and Geothermal Research Center, Korea Institute of Energy Research) ;
  • Baik, Young-Jin (Solar Thermal and Geothermal Research Center, Korea Institute of Energy Research) ;
  • Park, Seong-Ryong (Solar Thermal and Geothermal Research Center, Korea Institute of Energy Research) ;
  • Chang, Ki-Chang (Solar Thermal and Geothermal Research Center, Korea Institute of Energy Research) ;
  • Ra, Ho-Sang (Solar Thermal and Geothermal Research Center, Korea Institute of Energy Research) ;
  • Kim, Yong-Chan (Dept. of Mechanical Engineering, Korea Univ.)
  • 김지영 (한국에너지기술연구원 태양열지열연구센터) ;
  • 김민성 (한국에너지기술연구원 태양열지열연구센터) ;
  • 백영진 (한국에너지기술연구원 태양열지열연구센터) ;
  • 박성룡 (한국에너지기술연구원 태양열지열연구센터) ;
  • 장기창 (한국에너지기술연구원 태양열지열연구센터) ;
  • 나호상 (한국에너지기술연구원 태양열지열연구센터) ;
  • 김용찬 (고려대학교기계공학과)
  • Received : 2010.05.26
  • Accepted : 2011.01.05
  • Published : 2011.03.01
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Abstract

This research aims todevelopa compression/absorption hybrid heat pump system using an $NH_3/H_2O$ as working fluid.The heatpump cycle is based on a combination of compression and absorption cycles. The cycle consists of two-stage compressors, absorbers, a desorber, a desuperheater, solution heat exchangers, a solution pump, a rectifier, and a liquid/vapor separator. The compression/absorption hybrid heat pump was designed to produce hot water above $90^{\circ}C$ using high-temperature glide during a two-phase heat transfer. Distinct characteristics of the nonlinear temperature profile should be considered to maximize the performance of the absorber. In this study, the performance of the absorber was investigated depending on the capacity, shape, and arrangementof the plate heat exchangers with regard tothe concentration and distribution at the inlet of the absorber.

본 연구는 암모니아/물 혼합냉매를 이용한 압축/흡수식하이브리드 히트펌프 개발에 관한 연구이다. 히트펌프 사이클은 증기압축식과흡수식을 혼합한 개념으로 이단압축기, 흡수기, 재생기, 과열냉각기, 용액열교환기(SHX), 용액펌프, 정류기, 기액분리기 등으로 구성되어 있다. 압축/흡수식 히트펌프는 상변화 열교환과정에서 높은 온도구배를 이용하여 $90^{\circ}C$ 이상의 고온을 제조하기 위한 목적으로 고안되었다. 특히 흡수기에서의 응축과정은 비열변화로 인하여 온도변화에 비선형성이 뚜렷한데, 시스템 성능 최적화를 위하여는 흡수기의 설계가 중요하다. 본 연구에서는 다수의 판형열교환기로 흡수기를 구성하였는데 열교환기의 용량, 형태, 배치에 따른 성능특성을 실험적으로 관찰하였다.

Keywords

References

  1. Kim, M., Baik, Y.-J., Shin, K.-H., Park, S.-R., Chang, K.-C., Lee, Y.-S. and Ra, H.-S., 2006, “Development of a Compression/absorption Hybrid Heat Pump System Using NH3/H2O Mixture for High Temperature Generation,” Proc. of the SAREK 2007 Summer Annual Conference, pp. 1249-1254.
  2. Baik, Y.-J., Park, S.-R., Chang, K.-C. and Ra, H.-S., 2004, “Simulation of Compression/absorption Hybrid Heat Pump System using Industrial Wastewater Heat Source,” Korean J. of Air- Conditioning and Refrigeration Engineering, Vol. 16, No. 12, pp. 1117-1126.
  3. Baik, Y.-J., Park, S.-R., Kim, S.-J., Chang, K.-C. and Ra, H.-S., 2005, “Evaluation of DAHX Cycle in a Hybrid Heat Pump Hot Water Maker,” Proc. of the SAREK Summer Annual Conference, pp. 159-165.
  4. Ahlby, L., Hodgett, D. and Berntsson, T., 1991, “Optimization Study of the Compression/absorption Cycle,” Int. J. Refrig., Vol. 14, pp. 16-23. https://doi.org/10.1016/0140-7007(91)90017-B
  5. Itard, L.C.M. and Machielsem, C.H.M., 1994, “Considerations When Modeling Compression Resorption Heat Pump,” Int. J. Refrig., Vol. 17, No. 7, pp. 453-460. https://doi.org/10.1016/0140-7007(94)90005-1
  6. Kang, Y.T., Akisawa, A. and Kashiwangi, T., 2000, “Analytical Investigation of Two Different Absorption Modes: Falling Film and Bubbles,” Int. J. Refrig., Vol. 23, No. 6, pp. 430-443. https://doi.org/10.1016/S0140-7007(99)00075-4
  7. Nordtvedt, S. R., 2005, “Experimental and theoretical study of a compression/absorption heat pump with ammonia/water as working fluid,” Ph. D. dissertation, Norwegian University of Science and Technology, Kjeller, Norway
  8. Herold, K.E., Radermacher, R., Klein, S.A., 1996, Absorption Chillers and Heat Pump, CRC Press, New York, p. 218.

Cited by

  1. Experimental Study on Compression/Absorption High-Temperature Hybrid Heat Pump with Natural Refrigerant Mixture vol.35, pp.12, 2011, https://doi.org/10.3795/KSME-B.2011.35.12.1367