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THERMODYNAMIC OPTIMIZATION OF A SOLAR-BOOSTED OCEAN THERMAL ENERGY CONVERSION SYSTEM BASED ON ORGANIC RANKINE CYCLE
Man Wang, Jiangfeng Wang, Pan Zhao, Yiping Dai
Session: Poster session & Sponsor Exhibition
Session starts: Monday 07 October, 14:00
Man Wang (Xi'an Jiaotong University)
Jiangfeng Wang (Xi'an Jiaotong University)
Pan Zhao (Xi'an Jiaotong University)
Yiping Dai (Xi'an Jiaotong University)
Abstract:
This paper presents a solar-boosted Ocean Thermal Energy Conversion system based on organic Rankine cycle. Flat-plate solar collectors are installed to collect the solar radiation to elevate the temperature of warm surface seawater. By establishing thermodynamic models of system, parametric optimization is conducted to obtain the optimal system performance using different working fluids. Genetic Algorithm is employed to conduct the optimization of the system. The exergy efficiency of entire system is selected as the objective function under given conditions, and turbine inlet pressure, turbine back pressure and pinch point temperature in evaporator are chose to be the decision variable. Optimization results indicate that three parameters all have significant impact on system performance. Compared with other working fluids, the system using R245fa has the best exergy efficiency, shown as 5.23%, and the net power output can be 79.16 kW.