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
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.
