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

  • 제24권11호
  • /
  • Pages.792-798
  • /
  • 2012
  • /
  • 1229-6422(pISSN)
  • /
  • 2465-7611(eISSN)
대한설비공학회 (The Society of Air-Conditioning and Refrigerating Engineers of Korea)
권호 표지
DOI QR코드

DOI QR Code

열역학적 사이클의 제2법칙 효율의 정의에 대한 기본 연구

Basic Study on the Definition of the Second Law Efficiencies of Thermodynamic Cycles

  • 박경근 (국민대학교 기계시스템공학부)
  • 투고 : 2012.08.10
  • 발행 : 2012.11.10
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

A general concept on the definition of the second law efficiencies of thermodynamic cycles is introduced. The efficiency is defined to be proportional to the entropy generation divided by the maximum possible entropy generation. This way of definition of the cycle efficiency is clear and concise and, moreover, follows faithfully the concept of the second law of thermodynamics. This definition is applied to heat engine, refrigerator and heat pump. The second law efficiencies of heat engine and refrigeration cycles are derived, which are the same as the existing ones, respectively. The second law efficiency of heat pump, however, finds to be different from the existing one. Discussion is given about the difference and its cause.

키워드

참고문헌

  1. Cengel, Y. A. and Boles, M. A., 2011, Thermodynamics： An Engineering Approach, 7th ed., McGraw-Hill, New York, pp. 432-435.
  2. Borgnakke, C. and Sonntag, R. E., 2009, Fundamentals of Thermodynamics, 7th ed., SI version, John Wiley and Sons, New York, pp. 351-357.
  3. Moran, M. J. and Shapiro, H. N., 2008, Fundamentals of Engineering Thermo-dynamics, 6th ed., John Wiley and Sons, Hoboken, NJ, pp. 359-365.
  4. DiPippo, R., 2004, Second law assessment of binary plants generating power from lowtemperature geothermal fluids, Geothermics, Vol. 33, pp. 565-586. https://doi.org/10.1016/j.geothermics.2003.10.003
  5. Dincer, I. and Rosen, M. A., 2007, Exergy： Energy, Environment and Sustainable Development, Elsevier, Amsterdam, pp. 11-15.
  6. Lior, M. and Zhang, N., 2007, Energy, exergy, and second law performance criteria, Energy, Vol. 32, pp. 281-296. https://doi.org/10.1016/j.energy.2006.01.019
  7. Marmolejo-Correa, D. and Gundersen, T., 2012, A comparison of exergy efficiency definitions with focus on low temperature processes, Energy, Vol. 44, pp. 477-489. https://doi.org/10.1016/j.energy.2012.06.001
  8. Sekulic, D. P., 1990, The second law quality of energy transformation in a heat exchanger, J. Heat Transfer(Trans. ASME), Vol. 112, pp. 295-300. https://doi.org/10.1115/1.2910375
  9. Yilmaz, M., Sara, O. N., and Karsli, S., 2001, Performance evaluation criteria for heat exchangers based on second law analysis, Exergy Int. J., Vol. 1, pp. 278-294. https://doi.org/10.1016/S1164-0235(01)00034-6
  10. Sciubba, E. and Wall, G., 2007, A brief commented history of exergy from the beginnings to 2004, Int. J. Thermodyn., Vol. 10, pp. 1-26.
  11. Park, K. K., Basic study on the definition of the second law efficiencies of processes and components, manuscript in preparation.