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.

随着当前装置小型化的趋势和微尺度工艺的发展，出现了对微尺度传热设备的需求。例如，在微电子处理器中，热传递正在成为提高性能的限制因素。与单相冷却系统相比，相变对流传热可显着提高性能。然而，在微观尺度通道中，控制相变和流量分布的机制与宏观尺度下的机制不同。该项目包括一项实验研究，旨在解决与微通道中相变相关的一些问题，以及沸腾/冷凝理论的数值模拟，以帮助实验设计和开发基于微通道中两相流的热交换过程的设计程序新型实验技术（例如用于热通量和温度测量的微传感器、流体二极管）的开发将能够表征沸腾和冷凝的局部参数以及沸腾过程的主动控制。最先进的数值技术将补充实验研究，使结果应用于其他系统。这种使用创新的微传感器和控制系统的实验组合，使用先进的微加工设施开发，与数值建模相结合，为此类微型传热系统的设计程序的开发提供了独特的机会。