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논문 상세정보

2단압축 이산화탄소 사이클의 냉방성능 향상 특성에 대한 실험적 연구

Experimental Study on the Cooling Performance Improvement of a Two-stage Compression $CO_2$ Cycle

Abstract

A $CO_2$ system using the two-stage compression cycle was tested by varying $1^{st}-2^{nd}$ compressor frequencies in the cooling mode. To improve the cooling performance of the two-stage compression $CO_2$ cycle, the following cycle options were applied: a basic cycle, a cycle with an intercooler, a cycle with an IHX (internal heat exchanger), and a cycle with an intercooler and IHX. The cycle with the intercooler-IHX showed the highest cooling capacity improvement among the cycle options at all compressor frequencies. The cycle with the intercooler, the cycle with the IHX, and the cycle with the intercooler-IHX improved the cooling COP by 7, 12, and 15%, respectively, over the basic $CO_2$ cycle when the compressor frequencies for the first and second compressors were 50 Hz and 30 Hz, respectively. In addition, the applications of the selected cycle options enhanced system reliability.

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참고문헌 (10)

  1. Lorentzen, G. and Pettersen, J., 1993, A new, environmentally benign system for car air-conditioning, Int. Journal of Refrigeration, Vol. 16, No.1, pp.4-12 
  2. Yitai, M., Dong, W., Shitong, Z. and Minxia, L., 2002, Thermodynamic analysis and compression of expander for $CO_2$ transcritical cycle, 5th IIR-Gustav Lorentzen on Natural Working Fluids Conference at Guangzhou, pp. 292-297 
  3. Halozan, H. and Rieberer, R., 2000, $CO_2$ as refrigerant-possible application, The 4th IIR-Gustav Lorentzenon Natural Working Fluids at Purdue, pp. 43-50 
  4. Kim, S. and Kim, M., 2002, Experiment and simulation on the performance of an autocascade refrigeration system using carbon dioxide as a refrigerant, Int. Journal of Refrigeration, Vol. 25(8), pp. 1093-1101 
  5. ASHRAE, 1983, Methods of testing for seasonal efficiency of unitary air-conditioner and heat pumps, ASHRAE Standard 116 
  6. Hwang, Y. and Radermacher, R., 2002, Options for a two-stage transcritical carbon dioxide cycle, 5th IIR-Gustav Lorentzen Natural Working Fluids Conference at Guangzhou, pp. 143-149 
  7. Hwang, Y. and Radermacher, R., 1999, Experimental investigation of the $CO_2$ refrigeration cycle, ASHRAE Transactions, Vol. 105, Pt. 1, pp. 1219-1227 
  8. Groll, E., Baek, J., and Lawless, P., 2002, Effect of pressure ratios across compressors on the performance of the transcritical $CO_2$ cycle with. two-stage compression and intercooling, Compressor Engineering Conference at Purdue, R11-7 
  9. Neksa, P., Rekstad, H., Zakeri, R. and Schiefloe, P., 1998, $CO_2$-heat pump water heater: characteristics, system design and experimental results, Int. Journal of Refrigeration, Vol. 21, No.3. pp.172-179 
  10. Hrnjak, P., Richeter; M., Song, S., Yin, J., Kim, M. and Bullard, C., 2000, Transcritical $CO_2$ heat pump for residential application, 4th IIR-Gustav Lorentzen Natural Working Fluids Conference at Purdue, pp. 9-16 

이 논문을 인용한 문헌 (2)

  1. Han, Hwa-Taik ; Shin, Dong-Sin ; Choi, Chang-Ho ; Lee, Dae-Young ; Kim, Seo-Young ; Kwon, Yong-Il 2008. "Recent Progress in Air Conditioning and Refrigeration Research: A Review of Papers Published in the Korean Journal of Air-Conditioning and Refrigeration Engineering in 2006" 설비공학논문집 = Korean journal of air-conditioning and refrigeration engineering, 20(6): 427~446 
  2. Kwak, Myoung-Seok ; Cho, Hong-Hyun 2012. "Simulation Study on the Cooling Performance of the Two-Stage Compression CO2 Cycle with the a Flash Intercooler and Flash Gas Bypass" 大韓機械學會論文集. Transactions of the Korean Society of Mechanical Engineers. B. B, 36(1): 17~24 

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