Browse > Article
http://dx.doi.org/10.5916/jkosme.2012.36.8.1036

Exergy Analysis of R744 OTEC Power Cycle with Operation Parameters  

Yoon, Jung-In (부경대학교 냉동공조공학과)
Son, Chang-Hyo (부경대학교 냉동공조공학과)
Baek, Seung-Moon (부경대학교 대학원)
Kim, Hyeon-Ju (한국해양과학기술원 해양심층수연구센터)
Lee, Ho-Saeng (한국해양과학기술원 해양심층수연구센터)
Publication Information
Journal of Advanced Marine Engineering and Technology / v.36, no.8, 2012 , pp. 1036-1042 More about this Journal
Abstract
This paper describes an analysis on exergy efficiency of R744 OTEC power system to optimize the design for the operating parameters of this system. The operating parameters considered in this study include subcooling and superheating degree, evaporation and condensation temperature, and turbine and pump efficiency, respectively. The main results are summarized as follows : As the evaporation temperature, superheating degree, and turbine and pump efficiency of R744 OTEC power system increases, the exergy efficiency of this system increases, respectively. But condensation temperature and subcooling degree of R744 OTEC power system increases, the exergy efficiency of this system decreases, respectively. The effect of evaporation temperature and pump efficiency on R744 OTEC power system is the largest and the lowest among operation parameters, respectively. Therefore, the refrigerant temperature in the evaporator must be closely to the surface seawater temperature to enhance the exergy efficiency of R744 OTEC power system.
Keywords
Exergy analysis; Ocean thermal energy conversion (OTEC) power cycle; R744;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 H. S. Lee, H. J. Kim, D. H. Jung et al., "A study on the improvement for cycle efficiency of closed-type OTEC", Journal of the Korea Society of Marine Engineering, vol. 25, no. 1, pp. 80-84, 2011 (in Korean).   과학기술학회마을   DOI   ScienceOn
2 J. I. Yoon, C. H. Son, S. M. Baek et al., "Performance characteristic of R744 OTEC power cycle with operation parameters", Journal of the Korea Society of Marine Engineering, vol. 36, no. 5, pp. 10-14, 2012 (in Korean).   과학기술학회마을   DOI   ScienceOn
3 C. H. Son, H. K. Oh, "Heat exchanger for heat pump using $CO_2$", Journal of the Korea Society of Marine Engineering, vol. 32, no. 1, pp. 10-14, 2008 (in Korean).
4 C. H. Tseng, K. Kao, Y. Yang, et al., "Optimal design of a pilot OTEC power plant in Taiwan", J. Energy Resour. Technology, vol. 113, pp. 294-299, 1991.   DOI
5 R. H. Yeh, T. Z. Su, M. S. Yang, "Maximum output of an OTEC power plant", Ocean Engineering, vol. 32 pp. 685-700, 2005.   DOI   ScienceOn
6 N. J. Kim, C. N. Kim, W. Chun, "Using the condenser effluent from a nuclear power plant for Ocean Thermal Energy Conversion (OTEC)", International Communications in Heat and Mass Transfer, vol. 36, pp. 1008-1013, 2009.   DOI   ScienceOn
7 T. J. Rabas, C. B. Panchal, H. C. Stevens, "Integration and optimization of the gas removal system for hybrid-cycle OTEC power plants", Journal of Solar Energy Engineering, vol. 112, pp. 19-28, 1990.   DOI
8 H. Uehara, A. Miyara, Y. Ikegami, T. Nakaoka, "Performance analysis of an OTEC plant and a desalination plant using an integrated hybrid cycle", Journal of Solar Energy Engineering, vol. 118, pp. 115-122, 1996.   DOI   ScienceOn
9 Z. Shengjun, W. Huaixin, G. Tao, "Performance comparison and parametric optimization of subscritical organic rankine cycle(ORC) and transcritical power cycle system for low-temperature geothermal power generation", Applied Energy, vol. 88, pp. 2740-2754, 2011.   DOI   ScienceOn
10 A. Kazim, "Hydrogen production through an ocean thermal energy conversion system operating at an optimum temperature drop", Applied Thermal Engineering, vol. 25, pp. 2236-2246, 2005.   DOI   ScienceOn
11 T. Dylan, "Ocean thermal energy conversion: current overview and future outlook", Renew. Energy, vol. 6, no. 3, pp. 367-373, 1994.
12 EES: Engineering Equation Solver, fChart Software Inc, 2006.