Natural Convection in Microencapsulated PCM Slurries

将进行一系列实验来研究自然 水平和垂直加热的对流换热 表面使用中性浮力悬浮液， 微胶囊相变浆料。 这些目标是 (1)来验证理论预测的数量级 单相强化传热 系统;（2）开发相关性来预测传热 对于不同的浆料浓度;以及（3）定义 各种外壳中的流场和温度场， 验证未来详细的理论模型。 电子设备的热管理变得更加 随着微型化技术的进步， 被动 通过自然对流冷却具有以下优点： 简单可靠，但传热系数 传统的工作流体不足以 处理非常高的热通量。 本研究旨在 显著地扩展自然对流的上限， 加入含有相的中性浮力微球， 将材料转变为流体，大大提高了容量 来储存热量。

A set of experiments will be carried out to study natural convection heat transfer over horizontal and vertical heated surfaces using neutrally buoyant suspensions of microencapsulated phase change slurries. The objectives are (1) to verify theoretical predictions of an order-of-magnitude enhancement of heat transfer effectiveness over single phase systems; (2) to develop correlations to predict heat transfer for different slurry concentrations; and (3) to define the flow and temperature fields in various enclosures for validation of future detailed theoretical models. Thermal management of electronic devices becomes more important as miniaturization technology advances. Passive cooling through natural convection has the advantage of simplicity and reliability, but the heat transfer coefficients resulting from traditional working fluids are insufficient to handle the very high heat fluxes. This research aims to significantly extend the upper limit on natural convection by adding neutrally buoyant microspheres containing a phase change material to the fluid, greatly increasing the capacity to store heat.