Enhanced boiling experiments of two different enhanced structures were carried out in a thermosyphon loop evaporator chamber. One was micro-columns array structure (MCAS), which was fabricated on copper plate surface ...Enhanced boiling experiments of two different enhanced structures were carried out in a thermosyphon loop evaporator chamber. One was micro-columns array structure (MCAS), which was fabricated on copper plate surface with interaction high speed wire electrode discharge machining (HS-WEDM). The other was the ramification of MCAS, named micro-column-array and sintered-copper compound structure (MSCS), which was fabricated with sintered method on micro-column array structure. Considering the wall superheat and critical heat flux (CHF), comparisons were made between them. The results show that both MCAS and MSCS can enhance the boiling heat transfer. It is also found that the enhanced boiling heat transfer ability of MSCS is changed obviously while the porosity of the sintered copper layer is changed.展开更多
微能源网是多能流耦合的微电网系统,为优化其设备容量配置,针对内部分布式可再生能源和负荷的不确定性,提出了综合范数约束下场景概率驱动的微能源网分布鲁棒规划方法。基于风-光出力和电-热-氢负荷的历史数据聚类提取典型场景,并构建基...微能源网是多能流耦合的微电网系统,为优化其设备容量配置,针对内部分布式可再生能源和负荷的不确定性,提出了综合范数约束下场景概率驱动的微能源网分布鲁棒规划方法。基于风-光出力和电-热-氢负荷的历史数据聚类提取典型场景,并构建基于1-范数和∞-范数约束的场景概率分布不确定集以描述源-荷不确定性。以年综合成本最低为目标建立min-max-min三层分布鲁棒规划模型,采用列与约束生成(column and constraint generation, C&CG)算法求解。仿真结果表明,引入所提场景概率不确定集和分布鲁棒模型后,系统年综合成本降低1.33%,且模型在经济性和鲁棒性的平衡方面相比传统随机优化和鲁棒优化更有优势,可在更短的迭代次数内降低年综合成本。展开更多
利用原位聚合法在玻璃微管道内制备阴离子交换型固相萃取(SPE)微柱,以NO-2 为分析对象,针对NaNO2 KI Luminol发光体系设计微流控芯片,并将SPE微柱与微流控芯片连接起来组建成带有SPE微柱的复合式微流控芯片。分析了SPE微柱对NO-2 的吸...利用原位聚合法在玻璃微管道内制备阴离子交换型固相萃取(SPE)微柱,以NO-2 为分析对象,针对NaNO2 KI Luminol发光体系设计微流控芯片,并将SPE微柱与微流控芯片连接起来组建成带有SPE微柱的复合式微流控芯片。分析了SPE微柱对NO-2 的吸附保留与富集作用,在复合式微流控芯片上,实现了NO-2的进样、分离富集和检测,通过漏点曲线和交换容量两种方法分析了SPE微柱的柱容量。为控制SPE微柱的最大进样体积提供有利保障,并实现了食品中NO-2 的在线分离富集与检测。展开更多
基金Projects(50605023 50436010) supported by the National Natural Science Foundation of China
文摘Enhanced boiling experiments of two different enhanced structures were carried out in a thermosyphon loop evaporator chamber. One was micro-columns array structure (MCAS), which was fabricated on copper plate surface with interaction high speed wire electrode discharge machining (HS-WEDM). The other was the ramification of MCAS, named micro-column-array and sintered-copper compound structure (MSCS), which was fabricated with sintered method on micro-column array structure. Considering the wall superheat and critical heat flux (CHF), comparisons were made between them. The results show that both MCAS and MSCS can enhance the boiling heat transfer. It is also found that the enhanced boiling heat transfer ability of MSCS is changed obviously while the porosity of the sintered copper layer is changed.
文摘微能源网是多能流耦合的微电网系统,为优化其设备容量配置,针对内部分布式可再生能源和负荷的不确定性,提出了综合范数约束下场景概率驱动的微能源网分布鲁棒规划方法。基于风-光出力和电-热-氢负荷的历史数据聚类提取典型场景,并构建基于1-范数和∞-范数约束的场景概率分布不确定集以描述源-荷不确定性。以年综合成本最低为目标建立min-max-min三层分布鲁棒规划模型,采用列与约束生成(column and constraint generation, C&CG)算法求解。仿真结果表明,引入所提场景概率不确定集和分布鲁棒模型后,系统年综合成本降低1.33%,且模型在经济性和鲁棒性的平衡方面相比传统随机优化和鲁棒优化更有优势,可在更短的迭代次数内降低年综合成本。
