Elektrosprey Soğutmada Aseton-Su Karışımlarının Deneysel Olarak İncelenmesi

Öz

Bu çalışmada, elektrosprey (ES) soğutma yönteminde çalışma akışkanı olarak aseton-su karışımlarının performansı deneysel olarak incelenmiştir. Literatürde ES soğutmada yaygın olarak etanol esaslı çözeltiler tercih edilmekte olup, bu çalışmada ilk defa aseton–su karışımları kullanılarak özgün bir yaklaşım ortaya konulmuştur. Deneyler, 12 kV sabit voltaj, 55 mm nozul–ısı alıcı mesafesi, farklı debiler (10, 30, 50, 70 ve 90 ml/h) ve ısı akıları (2,72, 3,23, 3,69, 4,26 ve 4,91 kW/m²) altında gerçekleştirilmiştir. Karışım oranı olarak %25 aseton–%75 su ve %50 aseton–%50 su çözeltileri kullanılmıştır. Sonuçlar, sprey debisi ve karışım oranının ısı transfer performansı üzerinde belirleyici rol oynadığını göstermektedir. Düşük debilerde püskürtmenin yüzeyi alanına yeteri kadar nüfus edememesi nedeniyle sıcaklık farkı (ΔT) yüksek çıkarken, artan debilerle birlikte yüzey alanını kaplama etkinliği artmış ve daha düşük ΔT değerleri elde edilmiştir. Ayrıca, %50 aseton içeren karışım, düşük yüzey gerilimi ve yüksek buharlaşma eğilimi sayesinde daha yüksek ısı transfer katsayısı (h) sağlamıştır. Elde edilen bulgular, ES soğutmada aseton–su karışımlarının kullanılabilirliğini ortaya koymakta ve yüksek ısı akılarında mikroelektroniklerin termal yönetiminde potansiyel bir çözüm sunduğunu göstermektedir.

Anahtar Kelimeler

• Elektrosprey soğutma
• Aseton-su karışımları
• Isı transferi
• Isı akısı

Experimental Investigation of Acetone-Water Mixtures in Electrospray Cooling

Öz

In this study, the performance of acetone–water mixtures as working fluids in the electrospray (ES) cooling method was experimentally investigated. While ethanol-based solutions are commonly preferred in the literature for electrospray cooling, this work introduces a novel approach by employing acetone–water mixtures for the first time. The experiments were conducted under a constant voltage of 12 kV, a nozzle to heat sink distance of 55 mm, various flow rates (10, 30, 50, 70, and 90 ml/h), and heat fluxes (2.72, 3.23, 3.69, 4.26, and 4.91 kW/m²). Two different mixture ratios were tested: 25% acetone–75% water and 50% acetone–50% water solutions. The results indicate that both spray flow rate and mixture ratio play a decisive role in heat transfer performance. At low flow rates, the insufficient surface coverage of the spray led to higher temperature differences (ΔT), whereas with increasing flow rates, the surface coverage efficiency improved, resulting in lower ΔT values. Moreover, the 50% acetone mixture exhibited a higher heat transfer coefficient (h) due to its lower surface tension and higher volatility. The findings demonstrate the feasibility of employing acetone–water mixtures in electrospray cooling and highlight their potential as an effective thermal management solution for microelectronics operating under high heat flux conditions.

Anahtar Kelimeler

• Electrospray cooling
• Acetone–water mixtures
• Heat transfer
• Heat flux

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