A Study on the Simulations of a Trapezoidal Shaped Micro Heat Exchanger

梯形微熱交換器之模擬探討

鄧成忠(Thanhtrung Dang) ； 張耀仁(Yaw-Jen Chang) ； 鄧治東(Jyh-Tong Teng)

《先進工程學刊》 4卷4期 (2009/10) Pp. 397-402

https://doi.org/10.29948/JAE.200910.0013

摘要

微熱交換器常用於電子元件、汽車、化學工程和商業與住宅冷熱空調的加熱或冷卻。本文以模擬來探討梯形微熱交換器的流體流動和熱傳遞的特徵。此方法與傳統方法比較，分析結果相同。由這項研究，雷諾數得到從0到165.7，為層流。最小的雷諾數是0，發生在渠道邊緣，其速度為零；最大的雷諾數發生在入口歧管，有最大的溫度和速度。水入口溫度為80℃，流率0.0579 g/s，經由熱交換器可得到總熱通量為12 W/平方公分。

關鍵字

微熱交換器 ； 單相 ； 不可壓縮納米亞－斯多克 ； 溫度場 ； 速度場

並列摘要

Micro heat exchangers are employed to heat or cool in cooling electronic devices, automobiles, chemical engineering and commercial and residential heating/cooling. A trapezoidal shaped micro heat exchanger was simulated to carry out fluid flow and heat transfer characteristics. These approaches are compared with the traditional method which the results are the same. For this study, the Reynolds numbers get from 0 to 165.7 which is laminar flow. The minimal Reynolds number is zero that occurs at the edge of channels where the velocity is zero, the maximal Reynolds number occurs at the inlet manifold where the temperature and velocity term are maximum. A total heat flux of 13.6 W/cm^2 could be achieved from this heat exchanger for water with the inlet temperature of 80℃ and flow rate of 0.1158 g/s.

並列關鍵字

micro heat exchanger ； single phase ； incompressible Navier-Stokes ； temperature field ； velocity field