一种类表皮微流控散热装置：构建、能耗与适用面扩展探讨

发布时间：2018-01-26 10:16

本文关键词： 微流控表皮传热叶脉分叉结构节能减排　出处：《重庆大学》2016年硕士论文　论文类型：学位论文

【摘要】：微流控技术是在微尺度空间中构建微流动流路并加以精微控制的技术。近年来,这一技术领域从过去仅着眼于阐明微流路内在流动控制或操纵规律,也将一些注意力延展到这种内在微流动性能与外在世界之间的相互作用现象上。类表皮微流控装置,正是其中的一个例子。本论文在构建表皮型微流控技术装置的基础上,探讨这种具有微尺度特征装置的热能耗效应及其应用的可能性。首先,从表皮仿生出发,设计具有叶脉特点的微流路,探讨基于UV平板打印的微流控装置的构建工艺,加工出PDMS/玻璃复合的类表皮型微流控装置。接着,对上述步骤构建的类表皮型微流控装置的热力性能进行了实验表征。为此,在其通道出入口接入热电偶,并将所构建的类表皮微流控装置固定到可适宜温控操作与热成像的实验台上。实验时,使该微流控装置预热至35~40oC,在入口处分别灌以室温与0oC的纯水,在0.5、5、15ml/min的流量下,通过热电偶及红外热像仪记录观测其装置内部流路以及装置外表面的温度变化。结果表明,在0oC的纯水灌流下,该类表皮装置可以15min左右从原先的35~40oC降低到17oC,室温纯水灌流也可达7~10oC的降温效果。进一步从能耗角度的对比分析表明,这种看似简单的类表皮微流控装置,当其内部微流动与外界温度场相互作用,也显示出极为可观的降温与节能效力。围绕这种类表皮装置,我们建立一维稳态传热模型,结合现有经典公式,根据所设计的通道尺寸,推导出装置内部流量、温度与PDMS/玻璃装置尺寸之间的关系,并结合实验测定数据,通过MATLAB绘制出相关温度的拟合方程,与实验结果进行对比,进一步证明了实验结果的准确性。最后,对类表皮微流控装置技术在生物工程领域的场合如反应器温控、温室大棚,以及其它工程场合的应用可能与前景作了初步分析与展望。
[Abstract]:Microfluidic technology is a technique to construct and control micro-flow path in micro-scale space. In recent years, this field has focused only on clarifying the internal flow control or manipulation law of micro-flow path in the past. Some attention has also been extended to the interaction between the intrinsic microfluidity and the outside world. Epidermal microfluidic devices. On the basis of constructing the epidermal microfluidic device, this paper discusses the thermal energy consumption effect of the microfluidic device with microscale and the possibility of its application. Firstly, starting from the epidermis bionics. The microfluidic system with the characteristics of leaf vein was designed, and the construction process of the micro-fluidic device based on UV plate printing was discussed, and the PDMS / glass composite epidermoid microfluidic device was fabricated. The thermal performance of the epidermoid microfluidic device constructed by the above steps is experimentally characterized. For this purpose, the thermocouple is connected at the entrance and exit of the channel. The epidermis like microfluidic device was fixed to the experimental platform which was suitable for temperature control operation and thermal imaging. During the experiment, the microfluidic device was preheated to 35 ~ 40oC. Room temperature and 0oC pure water were perfused at the entrance, at the flow rate of 0.5 渭 g / min and 15 ml / min, respectively. The temperature changes of the inner flow path and the outer surface of the device were observed by thermocouple and infrared thermal imager. The results show that the flow is filled with pure water at 0oC. This kind of epidermal device can be reduced from 35 ~ 40oC to 17oC in about 15 minutes. The cooling effect of room temperature pure water irrigation can also reach 710oC. The comparison and analysis of energy consumption shows that this seemingly simple epidermis microfluidic control device. When the internal microflow interacts with the external temperature field, it also shows considerable cooling and energy-saving effects. Around this kind of epidermis device, we establish a one-dimensional steady-state heat transfer model, combining with the existing classical formulas. According to the designed channel size, the relationship between the internal flow rate, temperature and PDMS / glass device size is deduced, and the experimental data are combined. The fitting equation of correlation temperature is drawn by MATLAB, and compared with the experimental results, the accuracy of the experimental results is further proved. Finally. The application of epidermal microfluidic technology in bioengineering fields such as reactor temperature control greenhouse greenhouse and other engineering applications is analyzed and prospected.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TK172

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