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Boiling and Condensation in Microchannels

微通道中的沸腾和冷凝

基本信息

批准号：
EP/D500095/1
负责人：
Tassos Karayiannis
金额：
$ 29.96万
依托单位：
Brunel University London
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2006
资助国家：
英国
起止时间：
2006 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=EP%2FD500095%2F1
关键词：
Boiling Condensation Microchannels

项目摘要

With the present trend towards miniaturisation of devices and development of microscale processes, there has arisen the need for microscale heat transfer equipment. For instance, in microelectronic processors, heat transfer is becoming the limiting factor in relation to increasing performance. Convective heat transfer with phase change offers significant performance improvements over single phase cooling systems. However, in microscale channels the mechanisms controlling the phase change and flow distribution differ from those at the macroscale. This project comprises an experimental study to solve some of the problems associated with phase change in microchannels and also the numerical modelling of boiling/condensation theory to both aid in design of experiments and develop design procedures for heat exchange processes based on two phase flow in microchannels.Development of novel experimental techniques (eg microsensor for heat flux and temperature measurement, fluid diode) will enable characterisation of local parameters in both boiling and condensation and active control of the boiling process.State-of-the-art numerical techniques will supplement the experimental investigation, enabling results to be applied to other systems. This combination of experimentation using innovative microsensors and control systems, developed using advanced microfabrication facilities, with numerical modelling offers a unique opportunity for the development of design procedures for such microscale heat transfer systems.

随着当前设备小型化和微尺度工艺的发展，出现了对微型传热设备的需求。例如，在微电子处理器中，热传递正在成为与提高性能相关的限制因素。与单相冷却系统相比，相变对流换热提供了显著的性能改进。然而，在微尺度通道中，控制相变和流动分布的机制与宏观尺度上的不同。该项目包括一项实验研究，以解决微通道中与相变相关的一些问题，以及沸腾/冷凝理论的数值模拟，以帮助设计实验和开发基于微通道中两相流的换热过程的设计程序。新实验技术的发展(如用于热流和温度测量的微传感器，流体二极管)将使沸腾和冷凝局部参数的表征和沸腾过程的主动控制成为可能。最先进的数值技术将补充实验研究，使结果能够应用于其他系统。利用先进的微制造设备开发的创新微传感器和控制系统的实验与数值建模相结合，为开发此类微尺度热传递系统的设计程序提供了独特的机会。