Experimental Investigation of Plate Fin Heat Sink Thermal Performance in Forced Convection

Öz

In this study, the thermal performance of the plate type fin (PID) heat spreader with the finless flat heat spreader (DID) was experimentally investigated at 30℃ ambient temperature, 33-66-99 W thermal powers and 2000-16000 Reynolds number ranges. Considering the average powers, the plate model has an advantage of 57 ℃ at surface temperature and 30.5 ℃ at junction temperature, compared to flat one. The plate model in Nu number is 79%, 35% and 38% higher for the powers, respectively, compared to the flat model, and it clearly showed a very good heat transfer performance at 33 W. In thermal resistance, the plate model had lower values of 0.61, 0.50 and 0.39 K/W for the powers, respectively, compared to the flat, and showed a decreasing trend with the increase in power. The pressure drop of the plate model was 0.88, 0.75 and 1.13 Pa higher for the powers compared to the flat one, respectively. These small differences in pressure drop are due to the fact that the plate model has fins parallel to the flow. In THP, the plate model provided a 40%, 10% and 10% advantage for the powers, respectively, compared to the flat one, and showed a significantly higher performance, especially for 33 W. With the increase in power, the advantage of the plate model in THP decreased.

Anahtar Kelimeler

• heat sink
• plate fin
• forced convection
• thermal performance

Plaka Kanatlı Isı Dağıtıcı Termal Performansının Deneysel Olarak Zorlanmış Konveksiyonda İncelenmesi

Öz

Bu çalışmada, plaka kanatlara (PID) sahip ısı dağıtıcının karşılaştırmalı olarak kanatsız düz ısı dağıtıcı (DID) ile termal performansı 30 ℃ ortam sıcaklığında, 33-66-99 W ısıl güçlerinde ve 2000-16000 Reynolds sayısı aralıklarında deneysel olarak incelenmiştir. Güç ortalaması dikkate alınarak plaka model düze göre yüzey sıcaklıklarında 57 ℃ ve eklem sıcaklıklarında 30.5 ℃’lik avantaj sağlamıştır. Nu sayısında plakalı model düze göre güçler için sırasıyla %79, %35 ve %38 daha yüksek olup buradan bariz olarak 33 W’ta oldukça iyi bir ısı transfer performansı sergilemiştir. Termal dirençte plakalı model düze göre güçler için sırasıyla 0.61, 0.50 ve 0.39 K/W daha düşük değerlere sahip olup güç artışıyla azalan bir eğilim göstermiştir. Plakalı modelin basınç kaybı düze göre güçler için sırasıyla 0.88, 0.75 ve 1.13 Pa yüksek gerçekleşmiştir. Basınç kaybındaki bu küçük farkların, plakalı modelin akışa paralel kanatlara sahip olmasının payı büyüktür. THP’de ise plakalı model düze göre güçler için sırasıyla %40, %10 ve %10 avantaj sağlamış ve özellikle 33 W için bariz yüksek bir performans sergilemiştir. Güç artışıyla THP’deki plakalı modelin avantajı azalmıştır.

Anahtar Kelimeler

• ısı dağıtıcı
• plaka kanat
• zorlanmış konveksiyon
• termal performans

Kaynakça

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