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Analysis of the Effect of Solar Radiation on Ocean Thermal Energy Conversion (OTEC) in Vietnam 4. Conclusions References: The thermodynamic properties of 19 fluids are [1] analyzed to select a suitable working fluid for present SH-OTEC. Several criteria such as evaporating condensing pressure, volume flow rate, efficiency are [2] used for evaluation. Each of working fluid has still advantages and disadvantages. Any substance can not be a perfect working fluid for design. In summary, R152A R152A, R600, and R600A, in that order, are [3] considered as the most suitable working fluids for present SH-OTEC. The performance of the SH-OTEC for 1 kW work [4] output has been investigated theoretically in this study. The results present that the effective area of solar collector for 200C increase in collector outlet temperature fluctuates from 42.3 m2 to 82.2 m2 due to change in the monthly average solar gain in Nha [5] Trang, Vietnam. The annual average efficiency of the SH-OTEC increases up to 8.2% for the solar collector area of 90 m2. This value of efficiency is becoming increasingly important due to the rapid exhaustion of the earth’s fossil resources and the [6] increasing trend of fuel price. Yeh, R. H., Su, T. Z., and Yang, M. S., 2005, “Maximum output of an OTEC power plant,” Ocean Engineering, Vol. 32, pp. 685~700. Tong, W., Liang, D., Chuangang, G., and Bo, Y., 2008, “Performance analysis and improvement for CC-OTEC system,” Journal of Mechanical Science and Technology. Vol. 22, pp.1977~1983. Yamada, N., Hoshi, A., and Ikegami, Y., 2009, “Performance simulation of solar-boosted ocean thermal energy conversion,” Renewable Energy. Vol. 34, pp.1752~1758. Straatman, P. T. and van Sark, W. G., 2008, “A new hybrid ocean thermal energy conversion- offshore solar pond (OTEC-OSP) design: a cost optimization approach,” Solar Energy Vol. 82, pp. 520~5277. Tchanch, B. F., Papadakis, G., Lambrinos, G., and Frangoudakis, A., 2009, “Fluid selection for a low-temperature solar organic Rankine cycle,” Applied Thermal Engineering. Vol. 29, pp. 2468~2476. Duffie, J. A. and Beckman, W. A., Solar engineering of thermal processes, 2nd ed. John Wiley and Sons Inc, USA, 1991. International Journal of Renewable ISSN 2348-0157, Vol. 02, No. 02, April 2014, pp 100-104 [7] Solar Laboratory of Energy (USA): Manuals of TRNSYS ver.16, University of Wisconsin- Madison, USA, 1994. [8] Klein, S. A., Engineering Equation Solver. F- Chart Software. Commercial version 6.883-3D. Energy and Environmental EngineeringPDF Image | Analysis of the Effect of Solar Radiation on OTEC
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