A criterion to optimize ORC design performance taking into account real turbine efficiencies
Several studies on Organic Rankine Cycles(ORCs)in the literature search for the optimal cycle parameters and working fluids that maximize the net power output.Only few of these studies evaluate the real turbine efficiency,but this is done only after a thermodynamic optimization is performed assuming a fixed and somewhat arbitrary efficiency value.Instead,a new design optimization procedure of the ORCs is proposed here which embeds a correlation for the design turbine efficiency.The correlation was obtained from published data in the literature and uses the volumetric expansion ratio and the size parameter as predictors of the turbine efficiency.The procedure has a general validity being the correlation applicable to any fluid.Results show how the selection of the working fluid influences the achievable turbine efficiency and how the optimal maximum pressure of the cycle deviates from that obtained in a thermodynamic optimization in which the turbine efficiency is fixed.
Organic Rankine Cycle synthesis/design optimization turbine design working fluid selection power generation
Andrea Lazzaretto Giovanni Manente
University of Padova,Department of Industrial Engineering,Via Venezia 1,35131 Padova,Italy
国际会议
桂林
英文
1-9
2013-07-16（万方平台首次上网日期，不代表论文的发表时间）