Akış yönü ve hızının su soğutmalı ısı alıcısı performansına etkisinin nümerik incelenmesi

Year 2022, Volume: 12 Issue: 1, 151 - 163, 15.01.2022

Seyda Özbektaş , Bilal Sungur , Bahattin Topaloğlu

https://doi.org/10.17714/gumusfenbil.910468

Abstract

Elektronik bileşenlerin en önemli sorunları, yüksek güç tüketimi ve kısa ömürdür. Bu çalışmanın amacı, su soğutmalı ısı alıcının çalışma sürecini sayısal olarak modellemek ve bu sayede en etkili tasarımı elde etmektir. Bu kapsamda akış ve ısı transferini simüle etmek için suyun 0.25 m/s, 0.5 m/s ve 1 m/s hızlarında ve sabit hava hızında (6 m/s) farklı geçişlere sahip dört farklı geometri (Tip-A, Tip-B, Tip-C, Tip-D) dizayn edilmiştir. Sonuçlar, sıcaklık ve basınç konturları, akım çizgileri ve basınç farkı, çıkış sıcaklığı, sıcaklık farkı, havaya olan ısı transferi ve güç tüketiminin Reynolds ile değişimi grafiklerine bağlı olarak değerlendirilmiştir. Tüm analizlerde Reynolds sayısının artışıyla birlikte basınç farkı, çıkış sıcaklığı, güç tüketimi ve havaya olan ısı transferi artmıştır. Tüm modellerde suyun çıkış sıcaklıkları birbirine çok yakın olup Re=2500 için 63-65 °C, Re=5000 için 70-72 °C ve Re=10000 için 74-76 °C aralığındadır. Tüm modeller arasında Re=2500 için 63.40 °C, Re=5000 için 70.77 °C ve Re=10000 için 74.85 °C değerleriyle en düşük çıkış sıcaklığına Tip-A sahiptir. Ayrıca Tip-A, Re=2500 için 1346 W, Re=5000 için 1500 W ve Re=10000 için 1675 W değerleri ile havaya olan ısı transferi açısından diğer modellere göre daha iyi performans göstermiştir. En yüksek basınç farkı, 10000 Reynolds sayısında yaklaşık olarak 3500 Pa değeriyle Tip-A geometrisinde elde edilmiştir. Sonuçlar bütünüyle değerlendirildiğinde, Tip-B'nin ısı transferi, pompa gücü ve giriş-çıkış pozisyonları açısından kullanıma en uygun model olduğu sonucuna varılmıştır.

Keywords

Elektronik soğutma, Isı alıcı, Sıvı soğutma, Nümerik modelleme

Numerical investigation of the effect of flow circulation pattern and velocity on the performance of water-cooled heat sink

Abstract

The most critical problems of electronic components are the high power consumption and lesser life. This paper aims to numerically model the working process of the water-cooled heat sink to obtain the most effective design. In this context, four types of configurations with different passes (Type-A, Type-B, Type-C, Type-D) were designed at different water velocities, which were 0.25 m/s, 0.5 m/s, and 1 m/s with constant air velocity (6 m/s) to simulate fluid flow and the heat transfer. Results were evaluated as temperature and pressure contours, velocity streamlines, and the graphics of pressure difference, outlet temperature, temperature difference, heat transfer rate to air, and power consumption in relation to Reynolds number. Results showed that pressure difference, outlet temperature, power consumption, and heat transfer rate to air increased by increasing Reynolds number in all analyses. In all configurations, the water outlet temperatures were very close to each other, in the range of 63-65 °C for Re=2500, 70-72 °C for Re=5000, and 74-76 °C for Re=10000. Among all configurations, Type-A has the minimum outlet temperature with the value of 63.40 °C for Re=2500, 70.77 °C for Re=5000, and 74.85 °C for Re=10000. Also, Type-A showed better performance than other models in terms of heat transfer rate to air with the value of 1346 W for Re=2500, 1500 W for Re=5000, and 1675 W for Re=10000. The maximum pressure difference was obtained in Type-A geometry with the value of nearly 3500 Pa at a Reynolds number value of 10000. When the results were evaluated in full scope, it was concluded that Type-B was the most suitable model for use in terms of heat transfer, pump power, and inlet-outlet positions.

Keywords

Electronic cooling, Heat sink, Liquid cooling, Numerical modeling

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