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Heat transfer and residence time distribution of liquid flow in direct contact evaporation heat exchanger
Chemical Engineering and Processing: Process Intensification ( IF 3.8 ) Pub Date : 2020-01-22 , DOI: 10.1016/j.cep.2020.107829
Hailing Fu

To enhance the heat transfer of liquids, a new gas-liquid-liquid three-phase exchanger based on the SK elements was proposed for utilization in energy recovery. Visual experimental investigation of the particle transport characteristics was carried out. The effects of the flow velocity, pipe diameter, arrangement, number and length-to-diameter ratio of elements on the mean residence time (MRT) were studied. An analysis of the velocity distribution of the particles of the operated cell through the SK element was performed. A pentane-water direct contact evaporation heat transfer experiment was carried out to investigate the effect of the SK elements on the heat transfer performance. The results indicated that the SK elements reduced the evaporation height, and the volumetric heat transfer coefficient was more than two times greater than that in the heat exchanger without the SK elements.



中文翻译:

直接接触蒸发式换热器中液体流的传热和停留时间分布

为了提高液体的传热效率,提出了一种基于SK元件的新型气-液-液三相交换器,用于能量回收。目视实验研究了颗粒的传输特性。研究了流速,管径,布置,元件数量和长径比对平均停留时间(MRT)的影响。通过SK元件对手术细胞的颗粒的速度分布进行了分析。进行了戊烷-水直接接触蒸发传热实验,研究了SK元素对传热性能的影响。结果表明,SK元素降低了蒸发高度,

更新日期:2020-01-22
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