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微通道内稀乳液流动沸腾换热特性的实验研究 被引量:3
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作者 张子涛 吴越 +1 位作者 何坤 晏鑫 《西安交通大学学报》 EI CAS CSCD 北大核心 2023年第4期60-70,共11页
采用实验方法,研究了3种水力直径、2种工质(去离子水,连续相为去离子水、分散相体积分数为1%的FC-72/水乳液)、3种质量流量、不同壁面有效热流密度条件下微通道内的流动沸腾传热和压降特性,获得了不同条件下微通道内的归一化流动传热性... 采用实验方法,研究了3种水力直径、2种工质(去离子水,连续相为去离子水、分散相体积分数为1%的FC-72/水乳液)、3种质量流量、不同壁面有效热流密度条件下微通道内的流动沸腾传热和压降特性,获得了不同条件下微通道内的归一化流动传热性能因子,并对典型流动沸腾工况下的流态进行了可视化测量。结果表明:向微通道内添加FC-72乳液分散相后,分散相的沸腾扰动使得气泡更容易脱离壁面,导致核态沸腾提前、换热强化,但换热强化效果随着壁温的增加而减弱。当微通道高度分别为217、433μm时,相对于去离子水工质,添加FC-72乳液分散相,可使微通道内的换热系数分别增加63.8%、103.5%,但微通道内压降略有增加。随着壁温的增加,压降先减后增、换热因子先增后减。当微通道内连续相产生核态沸腾时,换热因子达到极大值,微通道高度分别为217、433μm时,其流动换热因子极值分别为1.41和1.91。 展开更多
关键词 微通道 换热 流动沸腾 稀乳液 流动可视化
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Separation of Lactic Acid from Diluted Solution by Hybrid Short Path Evaporation and Reactive Distillation
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作者 Andrea Komesu Johnatt Allan Rocha de Oliveira +1 位作者 Maria Regina Wolf Maciel Rubens Maciel Filho 《Journal of Chemistry and Chemical Engineering》 2016年第6期271-276,共6页
This work describes the separation and purification of lactic acid from diluted solution by HSPE (hybrid short path evaporation) and RD (reactive distillation) as coupled process. The results showed that it is pos... This work describes the separation and purification of lactic acid from diluted solution by HSPE (hybrid short path evaporation) and RD (reactive distillation) as coupled process. The results showed that it is possible to increase lactic acid concentration up to 4.7 times higher than the raw material concentration. 展开更多
关键词 Lactic acid hybrid short path evaporation reactive distillation separation processes.
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Separation of Oil Phase from Dilute Oil/Water Emulsion in Confined Space Apparatus
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作者 王硕 秦炜 戴猷元 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2012年第2期239-245,共7页
A miniature process for separating the oil phase from dilute oil/water emulsion is developed.This process applies a confined space apparatus,which is a thin flow channel made of two parallel plastic plates.The space b... A miniature process for separating the oil phase from dilute oil/water emulsion is developed.This process applies a confined space apparatus,which is a thin flow channel made of two parallel plastic plates.The space between the two plates is rather narrow to improve the collisions between oil droplets and the plate surface.Oil droplets have an affinity for the plate surface and thus are captured,and then coalesce onto the surface.The droplet size distribution of the residual emulsion resulted from the separation process is remarkably changed.The oil layer on the plate weakens the further separation of oil droplets from the emulsion.Three types of plate materials,polypropylene(PP),polytetrafluoroethylene(PTFE) and nylon 66,were used.It is found that PP is the best in terms of the oil separation efficiency and nylon 66 is the poorest.The interaction between droplets in the emulsion and plate surface is indicated by the spreading coefficient of oil droplet on the plate in aqueous environment,and the influences of formed oil layer and plate material on the separation efficiency are discussed. 展开更多
关键词 oil/water emulsion confined space apparatus oil separation efficiency spreading coefficient
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