【摘 要】
：
Supercritical CO2 Brayton cycle has high efficiency,compactness,and excellent power generation potential.In the design of the cycle,some parameters,such as recuperator pinch point temperature difference(△Trec,pp),turbine inlet temperature(Ttur,in),and max
【机 构】
：
Key Laboratory for Thermal Science and Power Engineering of MOE,Beijing Key Laboratory for CO2 Utili
论文部分内容阅读
Supercritical CO2 Brayton cycle has high efficiency,compactness,and excellent power generation potential.In the design of the cycle,some parameters,such as recuperator pinch point temperature difference(△Trec,pp),turbine inlet temperature(Ttur,in),and maximum cycle pressure(Pmax),are often preset without optimization.Furthermore,different preferences on efficiency and cost tradeoff can significantly affect the optimal design of the cycle,and the influence of different parameters on the design condition and the optimum cycle configuration becomes unclear as the preference changes.In this study,different preferences on efficiency and cost tradeoff are considered,and the effects of cycle configuration and optimization parameter addition on the tradeoff are investigated.In addition,four configurations under different preferences on tradeoff are recommended.Results show that the design condition parameters △Trec,pp decrease and Ttur,in and Pmax increase as the preference of thermal efficiency(Wth)increases.Different optimized parameters affect the results of the design point and cycle performance.In addition,the simple recuperative cycle and reheating cycle are recommended when low cycle initial cost dominates(Wth＜0.598),and the re-compression cycle and intercooling cycle are recommended when high cycle thermal efficiency dominates(Wth＞0.701).The decision maker can select appropriate configuration according to specific preferences.
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