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

  • 제25권4호
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  • Pages.173-179
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  • 2013
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  • 1229-6422(pISSN)
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  • 2465-7611(eISSN)
대한설비공학회 (The Society of Air-Conditioning and Refrigerating Engineers of Korea)
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중형 이산화탄소 급탕기의 최적 설계

Optimum Design of Middle-Sized CO2 Water Heater

  • 박한빛 (한밭대학교 기계공학과) ;
  • 윤린 (한밭대학교 기계공학과) ;
  • 김영득 (인덕대학교 기계자동차공학과)
  • Park, Hanvit (Department of Mechanical Engineering, Hanbat National University) ;
  • Yun, Rin (Department of Mechanical Engineering, Hanbat National University) ;
  • Kim, Young Deug (Department of Mechanical and Automotive Engineering, Induk University)
  • 투고 : 2012.11.01
  • 발행 : 2013.04.10
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초록

Middle-sized $CO_2$ water heater having compressor power of 7.45 kW was designed, and its performances were experimentally tested. Besides, optimum design of the $CO_2$ water heater was conducted by cycle simulation. When ambient temperature of $7^{\circ}C$ and hot water outlet temperature of $80^{\circ}C$ the $CO_2$ water heater showed the COP of 3.2. As hot water temperature increased the COP is getting decreased due to significant increase of compressor power consumption compared to increasing rate of heating capacity. When ambient temperature increased from $-3^{\circ}C$ to $12^{\circ}C$ the COP increased by 30%. The optimum components design of a gas cooler, an internal heat exchanger, and an evaporator were conducted, and the experimental correlation between amount of EEV opening and ambient temperature, and hot water temperature was suggested.

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참고문헌

  1. Laipradit, P., Tiansuwan, J., Kiatsiriroat, T., and Aye, L., 2008, Theoretical performance analysis of heat pump water heater using carbone dioxide as refrigerant, Int. J. Energy Res, Vol. 32, pp. 356-366. https://doi.org/10.1002/er.1357
  2. Swamee, P. K., Aggarwal, N., and Aggarwal, V., 2008, Optimum design of double pipe heat exchanger, International Journal of Heat and Mass Transfer, Vol. 51, pp. 2260-2266. https://doi.org/10.1016/j.ijheatmasstransfer.2007.10.028
  3. Cho, H. H., Lee, M. Y., and Kim, Y. C., 2009, Numerical evaluation on the performance of advanced $CO_2$ cycles in the cooling mode operation, Applied Thermal Engineering, Vol. 29, pp. 1485-1492. https://doi.org/10.1016/j.applthermaleng.2008.06.030
  4. Beak, C. H., Lee, E. C., Kang, H., Kim, Y. C., Cho, H. H., and Cho, S. W., 2008, Experimental study on the heating performance of a $CO_2$ heat pump water heater, Proceeding of the SAREK 2008 Winter Annual Conference, pp. 310-315.
  5. Choi, K. M., Jeon, M. J., Son, C. H., and Oh, H. K., 2009, Performance analysis of R744(carbon dioxide) transcritical refrigeration system using internal heat exchanger, Proceedings of the KSME 2009 Thermal Engineering Division Spring Annual Meeting, pp. 538-544.
  6. Son, C. H., Lee, D. G., Oh, H. K., and Kim, Y. L., 2004, The heat transfer and pressure drop characteristics of $CO_2$ during supercritical region in a horizontal tube, Journal of Korean Society of Marine Engineers, Vol. 28, No. 3, pp. 500-508.
  7. Park, H. V. and Yun, R., 2012, Studies on performance of $CO_2$ water heater by numerical modeling, Korean Journal of Air-Conditioning and Refrigeration, Vol. 25, pp. 1-8. https://doi.org/10.6110/KJACR.2013.25.1.020